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Elnagdy NA, Ragab TIM, Fadel MA, Abou-Zeid MA, Esawy MA. Bioethanol Production from Characterized Pre-treated Sugarcane Trash and Jatropha Agrowastes. J Biotechnol 2024; 386:28-41. [PMID: 38461861 DOI: 10.1016/j.jbiotec.2024.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/25/2024] [Accepted: 02/25/2024] [Indexed: 03/12/2024]
Abstract
Low production costs and a potential feedstock supply make lignocellulosic ethanol (bioethanol) an important source of advanced biofuels. The physical and chemical preparation of this kind of lignocellulosic feedstock led to a high ethanol yield. In order to increase the yield of fermentable sugars, pretreatment is an essential process step that alters the lignocellulosic structure and improves its accessibility for the expensive hydrolytic enzymes. In this context, the chemical composition of sugarcane trash (dry leaves, green leaves, and tops) and jatropha (shell and seed cake) was determined to be mainly cellulose, hemicellulose, and lignin. Hydrogen peroxide and sodium hydroxide were applied in an attempt to facilitate the solubilization of lignin and hemicelluloses in five agrowastes. The extraction of hydrogen peroxide was much better than that of sodium hydroxide. A comparative study was done using SEM, EDXA, and FTIR to evaluate the difference between the two methods. The pretreated wastes were subjected to saccharification by commercial cellulases (30 IU/g substrate). The obtained glucose was fortified with nutrients and fermented statically by Saccharomyces cerevisiae F-307 for bioethanol production. The results revealed the bioethanol yields were 325.4, 310.8, 282.9, 302.4 and 264.0 mg ethanol/g treated agrowastes from green leaves of sugarcane, jatropha deolied seed cake, tops sugarcane, dry leaves of sugarcane, and jatropha shell, respectively. This study emphasizes the value of lignocellulosic agricultural waste as a resource for the production of biofuels as well as the significance of the extraction process.
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Affiliation(s)
- Naglaa A Elnagdy
- Department of Microbiology, Faculty of Science, Ain Shams University, Egypt
| | - Tamer I M Ragab
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries and Drug Research Institute, National Research Centre, Dokki, Cairo 12622, Egypt.
| | - Mohamed A Fadel
- Microbial Chemistry Department, Biotechnology Research Institute, National Research Centre, Giza 12622, Egypt
| | - Mohamed A Abou-Zeid
- Department of Microbiology, Faculty of Science, Ain Shams University, Egypt; Faculty of Science, Galala University, Egypt
| | - Mona A Esawy
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries and Drug Research Institute, National Research Centre, Dokki, Cairo 12622, Egypt
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Zhang K, Jiang Z, Li X, Wang D, Hong J. Enhancing simultaneous saccharification and co-fermentation of corncob by Kluyveromyces marxianus through overexpression of putative transcription regulator. Bioresour Technol 2024; 399:130627. [PMID: 38522677 DOI: 10.1016/j.biortech.2024.130627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/20/2024] [Accepted: 03/20/2024] [Indexed: 03/26/2024]
Abstract
Overexpression of a gene with unknown function in Kluyveromyces marxianus markedly improved tolerance to lignocellulosic biomass-derived inhibitors. This overexpression also enhanced tolerance to elevated temperatures, ethanol, and high concentrations of NaCl and glucose. Inhibitor degradation and transcriptome analyses related this K. marxianusMultiple Stress Resistance (KmMSR) gene to the robustness of yeast cells. Nuclear localization and DNA-binding domain analyses indicate that KmMsr is a putative transcriptional regulator. Overexpression of a mutant protein with deletion in the flexible region between amino acids 100 and 150 further enhanced tolerance to multiple inhibitors during fermentation, with ethanol production and productivity increasing by 36.31 % and 80.22 %, respectively. In simultaneous saccharification co-fermentation of corncob without detoxification, expression of KmMSR with the deleted flexible region improved ethanol production by 5-fold at 42 °C and 2-fold at 37 °C. Overexpression of the KmMSR mutant provides a strategy for constructing robust lignocellulosic biomass using strains.
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Affiliation(s)
- Kehui Zhang
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, Anhui, China; Biomedical Sciences and Health Laboratory of Anhui Province, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Ziyun Jiang
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Xingjiang Li
- School of Food Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
| | - Dongmei Wang
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, Anhui, China; Biomedical Sciences and Health Laboratory of Anhui Province, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Jiong Hong
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, Anhui, China; Hefei National Laboratory for Physical Science at the Microscale, Hefei 230026, Anhui, China; Biomedical Sciences and Health Laboratory of Anhui Province, University of Science and Technology of China, Hefei 230027, Anhui, China.
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Alotaibi AS, Alhumairi AM, Ghabban H, Alenzi AM, Hamouda RA. Simultaneous production of biofuel, and removal of heavy metals using marine alga Turbinaria turbinata as a feedstock in NEOM Region, Tabuk. Ecotoxicol Environ Saf 2024; 275:116224. [PMID: 38518610 DOI: 10.1016/j.ecoenv.2024.116224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/06/2024] [Accepted: 03/14/2024] [Indexed: 03/24/2024]
Abstract
Depletion of fossil fuel and pollution by heavy metals are two major global issues. The cell wall of algae consists of polymers of polysaccharides such as cellulose, hemicellulose, alginate, starch, and many others that are readily hydrolyzed to monosaccharides and hence are amenable to fermentation into bioethanol. Moreover, algae contain lipids that may undergo trans-esterification to biodiesel, and can be absorbed by heavy metals. In this study, extraction of lipids from Turbinaria turbinata (common brown alga) from the beach of Sharma, NEOM, Tabuk, Saudi Arabia by different solvents hexane, methanol, and hexane: methanol (1:1), and trans-esterification was performed to obtain biodiesel and investigated by GC.MS. The alga residue after fats extractions by different solvents was used in bioremediation synthetic wastewater containing 50 ppm of As-3, Co+2, Cu+2, Fe+2, Mn+2, and Zn+2. The residue of defatted alga was hydrolyzed by 2% H2SO4 and then fermented to obtain bioethanol. The combination of hexane: methanol (1:1) gave the greatest amount of petroleum hydrocarbons, which contain Tetradecane, 5-methyl, Octacosane, Pentatriacontane, and a small amount of Cyclotrisiloxane, Hexamethyl. The most effective removal % was obtained with alga residue defatted by hexane: methanol (1:1), and methanol, 100% removal of As-3, 83% Co+2, 95% Cu+2, 97.25% Fe+2, Mn+2 79.69%, Zn+2 90.15% with 2 g alga /L at 3 hours. The lowest value of sugar was obtained with hexane: methanol residue but gave the highest bioethanol efficiency. Thus, it is possible to use Turbinaria turbinata, or brown alga as a feedstock to produce bio-diesel, and bioethanol, and to remove heavy metals from wastewater, which may have a great economic and environmental significance.
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Affiliation(s)
- Amenah S Alotaibi
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia; Biodiversity Genomics Unit, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Abrar M Alhumairi
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat City, Egypt
| | - Hanaa Ghabban
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia; Biodiversity Genomics Unit, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Asma Massad Alenzi
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia; Biodiversity Genomics Unit, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Ragaa A Hamouda
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat City, Egypt; Department of Biology, College of Sciences and Arts Khulais, University of Jeddah, Jeddah, Saudi Arabia.
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Tapking C, Willkomm L, Stolle A, Harhaus L, Hundeshagen G, Bliesener B, Kneser U, Radu CA. Health-related quality of life after burn injury due to bioethanol-fueled fireplaces. Burns 2024; 50:685-690. [PMID: 38042627 DOI: 10.1016/j.burns.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 10/29/2023] [Accepted: 11/12/2023] [Indexed: 12/04/2023]
Abstract
OBJECTIVE Commercially available bioethanol-fueled fireplaces are a potential source of burns and are commonly used for home use. The present study aimed to evaluate the quality of life following burn injuries that were caused by bioethanol-related accidents. METHODS Burned patients who were admitted to our burn unit with burn injury due to bio-ethanol fueled fire places between January 2010 and December 2021 were contacted to ask for their willingness to participate in this study. They were asked to answer questions regarding the circumstances of the accident and three questionnaires to capture burn specific and general health related quality of life (Burn Specific Health Scale-Brief (BSHS-B), Short-Form Health Survey 36 (SF-36)) and general information about the accident. Patients were matched and compared to a group of patients suffering comparable burns from other burn mechanisms, which were also admitted to our burn unit at the same time. RESULTS Of 35 patients that met the inclusion criteria, 19 answered the questionnaire and were compared to 38 patients with other burn mechanisms. There were no statistical differences regarding age (bioethanol: 37.4 ± 14.7 years vs. control: 36.2 ± 14.3 years, p = 0.777), TBSA (9.9 ± 6.8% vs. 8.9 ± 10.4, p = 0.715), and sex (42.1% females vs. 36.8% females, p = 0.882). Most patients in the bioethanol-group reported that they did not follow the manual instructions (68.4%) and that the accident happened during the refilling process (52.6%). There was no significant difference in any subscale of the BSHS-B or the SF-36. DISCUSSION Burns related to bioethanol-fueled fireplaces are rare compared to other typical burn mechanisms. However, as they are used for personal pleasure and interior design, psychological impairment following burn may be even more critical. Detailed education on the use of these fireplaces needs to take place in order to reduce the risk of accidents.
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Affiliation(s)
- C Tapking
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - L Willkomm
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - A Stolle
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - L Harhaus
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - G Hundeshagen
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - B Bliesener
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - U Kneser
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - C A Radu
- Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany.
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Musharavati F, Ahmad A, Javed MH, Sajid K, Naqvi M. Sustainability assessment of biofuel and value-added product from organic fraction of municipal solid waste. Environ Res 2024; 246:118121. [PMID: 38184063 DOI: 10.1016/j.envres.2024.118121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/28/2023] [Accepted: 01/04/2024] [Indexed: 01/08/2024]
Abstract
The current study aims to examine the techno-economic and environmental assessment of biorefinery development within a circular bioeconomy context by using an organic fraction of municipal solid waste (OFMSW) by extraction of lipids, carbohydrates, and proteins with 98, 51 and 62 % by mass of conversion efficiency and yield recovery, and value-added fractions production as well. Fatty acid methyl ester (biodiesel) and glycerol (biofuel) were produced by applying transesterification process, and the remaining biomass was converted into biocrude oil by thermal liquefication. The biorefinery using 613 kg of OFMSW produced biodiesel, glycerol, and bioethanol with 126 litter, 14.3 kg, and 172 litter respectively, as well as value-added fractions, such as biocrude oil with 78 kg. The environmental impact was assessed using the life cycle assessment (LCA) framework, ReCiPe2016 Mid-point (H) approach, through 18 different environmental categories. The key findings elucidate that Terrestrial ecotoxicity, Climate change, Fossil depletion and Human toxicity were the main impact categories which are potentially contributed 9.81E+02 kg 1,4-DB eq., 1.43E+03 kg CO2 eq., 2.04E+02 kg oil eq., and 8.08E+01 kg 1,4-DB eq. The normalization (person per equivalent) analysis revealed that only categories of resource reduction (fossil and metal depletion) are the key contributors to environmental degradation. The biorefinery system's total revenue was estimated at USD 6.817,509 million annually. The calculated revenue was USD 0.026 million daily in a shift of 8 h. The Net present worth (NPW) was calculated at USD 499.97 million by assuming a discount factor of 10 % and inflation rate of 5 % for 15 years. The project is considered feasible by demonstrating 7.15 payback year. This research showcased the efficient portrayal of the biorefinery system and succinctly conveyed the significant circular bioeconomy for a greener future. Thus, it could be helpful to the stakeholder's context towards techno-economic and environmental evaluation.
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Affiliation(s)
- Farayi Musharavati
- Department of Mechanical and Industrial Engineering, Qatar University, Qatar.
| | - Anees Ahmad
- Sustainable Development Study Centre, Government College University, Lahore, 54000, Pakistan
| | - Muhammad Hassan Javed
- Sustainable Development Study Centre, Government College University, Lahore, 54000, Pakistan
| | - Khadija Sajid
- Sustainable Development Study Centre, Government College University, Lahore, 54000, Pakistan
| | - Muhammad Naqvi
- College of Engineering and Technology, American University of the Middle East, Kuwait
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6
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van Zoonen EE, van Eck IC, van Baar ME, Meij-de Vries A, van Schie CHM, van der Vlies CH. Aetiology of bioethanol related burn accidents: A qualitative study. Burns 2024; 50:733-741. [PMID: 38242767 DOI: 10.1016/j.burns.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 11/16/2023] [Accepted: 12/14/2023] [Indexed: 01/21/2024]
Abstract
BACKGROUND Since insight into the motivation of behaviour in bioethanol related burn accidents is lacking, this study aimed to qualitatively examine influencing factors in bioethanol related burn accidents. In order to identify target points for effective burn prevention. METHODS Patients previously admitted with bioethanol related acute non-intentional burn injury to the three Dutch burn centres were eligible. One interviewer conducted fourteen semi-structured interviews. Interviews were transcribed and coded by two independent researchers. Conclusions were drawn based on generalised statements on the concerned topics. RESULTS Four overall themes in influencing factors were found, namely 1) motivation; including non-designated use and impaired judgement, 2) knowledge and education; including unknown product and properties and information overload, 3) risk perception; including poor recognisability of risks and preferred trial and error and 4) thresholds; including easy availability and unclear liability. CONCLUSION Trust in consumers may be over-estimated, as proper use cannot be expected. To prevent future bioethanol related burn incidents, thresholds for obtaining and using bioethanol should be increased, safe alternatives to ignite open fires and wood stoves should be provided and knowledge and warnings should be improved.
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Affiliation(s)
| | | | - Margriet E van Baar
- Association of Dutch Burn Centres (ADBC), Burn Centre, Maasstad Hospital, Rotterdam, the Netherlands; Department of Public Health, Erasmus MC, Rotterdam, the Netherlands
| | - Annebeth Meij-de Vries
- Burn Centre, Red Cross Hospital, Beverwijk, the Netherlands; Association of Dutch Burn Centres (ADBC), Beverwijk, the Netherlands; Pediatric Surgical Center, Emma Children's Hospital, Amsterdam UMC, Location AMC, Amsterdam, the Netherlands
| | | | - Cornelis H van der Vlies
- Burn Centre, Maasstad Hospital, Rotterdam, the Netherlands; Erasmus MC, Trauma Research Unit, Department of Surgery, University Medical Center Rotterdam, Rotterdam, the Netherlands
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P V A, K M R, Raval K, Selvaraj S, Raval R. Identification and characterization of chitinase producing marine microorganism: Unleashing the potential of chitooligosaccharides for bioethanol synthesis. Int J Biol Macromol 2024; 265:130846. [PMID: 38492689 DOI: 10.1016/j.ijbiomac.2024.130846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/24/2024] [Accepted: 03/11/2024] [Indexed: 03/18/2024]
Abstract
The dwindling supply of the petroleum product and its carbon footprint has initiated search for a sustainable fuel and alternate feed-stocks. One such underexplored feedstock is chitin, a waste derived from sea food processing. The limitation of insolubility and crystallinity inherent in chitin is addressed with the chitin hydrolysates. In the present study, a chitinases producing marine isolate was isolated from the sediments of Arabian Sea from a depth of 20 m. In order to increase the expression of the chitinases, sequential optimisation using one factor at a time and Taguchi experimental designs were employed which resulted in a yield of 13.46 U/mL which was 2.62 fold higher than the initial bioprocess condition values. In a two-step refinery protocol, Candida albicans was evolved towards chitooligosaccharides using chemically synthesized hydrolysates. In a fed -batch fermentation design the Candida yielded a 12.8 % conversion of these commercial chitin oligosaccharides into bioethanol in a run time of 48 h. This is the first report demonstrating the potential of Candida to utilise chitin oligosaccharides for the production of bioethanol.
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Affiliation(s)
- Atheena P V
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Rajesh K M
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Keyur Raval
- Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, Karnataka, India
| | - Subbalaxmi Selvaraj
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
| | - Ritu Raval
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
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Liu L, Zhou Z, Gong G, Wu B, Todhanakasem T, Li J, Zhuang Y, He M. Economic co-production of cellulosic ethanol and microalgal biomass through efficient fixation of fermentation carbon dioxide. Bioresour Technol 2024; 396:130420. [PMID: 38336213 DOI: 10.1016/j.biortech.2024.130420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024]
Abstract
An integrated process for the co-production of cellulosic ethanol and microalgal biomass by fixing CO2 generated from bioethanol fermentation is proposed. Specifically, over one-fifth of the fermentative carbon was converted into high-purity CO2 during ethanol production. The optimal concentration of 4 % CO2 was identified for the growth and metabolism of Chlorella sp. BWY-1. A multiple short-term intermittent CO2 supply system was established to efficiently fix and recycle the waste CO2. Using this system, economical co-production of cellulosic ethanol by Zymomonas mobilis and microalgal biomass in biogas slurry wastewater was achieved, resulting in the production of ethanol at a rate of 0.4 g/L/h and a fixed fermentation CO2 of 3.1 g/L/d. Moreover, the amounts of algal biomass and chlorophyll a increased by over 50 % and two-fold, respectively. Through techno-economic analysis, the integrated process demonstrated its cost-effectiveness for cellulosic ethanol production. This study presents an innovative approach to a low-carbon circular bioeconomy.
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Affiliation(s)
- Linpei Liu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Zheng Zhou
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Guiping Gong
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Bo Wu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China.
| | - Tatsaporn Todhanakasem
- School of Food Industry, King Mongkut's Institute of Technology, Ladkrabang, Bangkok 10520, Thailand
| | - Jianting Li
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Yong Zhuang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Mingxiong He
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
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Song Y, Maskey S, Lee YG, Lee DS, Nguyen DT, Bae HJ. Optimizing bioconversion processes of rice husk into value-added products: D-psicose, bioethanol, and lactic acid. Bioresour Technol 2024; 395:130363. [PMID: 38253244 DOI: 10.1016/j.biortech.2024.130363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 01/24/2024]
Abstract
Rice husk, rich carbon content, is an agricultural waste produced globally at an amount of 120 million tons annually, and it has high potential as a biorefinery feedstock. Herein, we investigated the feasibility of producing various products as D-psicose, bioethanol and lactic acid from rice husk (RH) through a biorefinery process. Alkali-hydrogen peroxide-acetic acid pretreatment of RH effectively removed lignin and silica, resulting in enzymatic hydrolysis yield of approximately 86.3% under optimal hydrolysis conditions. By using xylose isomerase as well as D-psicose-3-epimerase with borate, glucose present in the RH hydrolysate was converted into D-psicose with a 40.6% conversion yield in the presence of borate. Furthermore, bioethanol (85.4%) and lactic acid (92.5%) were successfully produced from the RH hydrolysate. This study confirmed the high potential of RH as a biorefinery feedstock, and it is expected that various platform chemicals and value-added products can be produced using RH.
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Affiliation(s)
- Younho Song
- Bio-energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Shila Maskey
- Bio-energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yoon Gyo Lee
- Bio-energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Dae-Seok Lee
- Bio-energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea
| | | | - Hyeun-Jong Bae
- Bio-energy Research Center, Chonnam National University, Gwangju 61186, Republic of Korea; Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 61186, Republic of Korea.
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Das A, Verma M, Mishra V. Food waste to resource recovery: a way of green advocacy. Environ Sci Pollut Res Int 2024; 31:17874-17886. [PMID: 37186182 DOI: 10.1007/s11356-023-27193-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 04/19/2023] [Indexed: 05/17/2023]
Abstract
Due to the massive growth in population and urbanization, there has been a huge increase in the volume of food waste globally. The Food and Agriculture Organization (FAO) has estimated that around one-third of all food produced each year is wasted. Food waste leads to the emission of greenhouse gas and depletion of the soil fertility. Nevertheless, it has immense potential for the recovery of high-value energy, fuel, and other resources. This review summarizes the latest advances in resource recovery from food waste by using technologies that include food waste-mediated microbial fuel cell (MFC) for bioenergy production. In addition to this, utilization of food waste for the production of bioplastic, biogas, bioethanol, and fertilizer has been also discussed in detail. Competitive benefits and accompanying difficulties of these technologies have also been highlighted. Furthermore, future approaches for more efficient use of food waste for the recovery of valuable resources have been also offered from an interdisciplinary perspective.
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Affiliation(s)
- Alok Das
- School of Biochemical Engineering, IIT (BHU), U.P, Varanasi, 221005, India
| | - Manisha Verma
- School of Biochemical Engineering, IIT (BHU), U.P, Varanasi, 221005, India
| | - Vishal Mishra
- School of Biochemical Engineering, IIT (BHU), U.P, Varanasi, 221005, India.
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Dongmo DN, Nguemthe Ngouanwou MG, Atemkeng CD, Lemoupi Ngomade SB, Kenfack Atangana JA, Tiegam Tagne RF, Kamgaing T. Bioethanol production from cocoa hydrolysate and the assessment of its environmental sustainability. Heliyon 2024; 10:e25809. [PMID: 38352788 PMCID: PMC10863315 DOI: 10.1016/j.heliyon.2024.e25809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 01/22/2024] [Accepted: 02/02/2024] [Indexed: 02/16/2024] Open
Abstract
Bioethanol is recognized today as the most coveted biofuel, not only because of its tendency to reduce greenhouse gas emissions and other undesirable impacts associated with climate change, but also because of the simplicity of its methodology. This study evaluated bioethanol production from cocoa waste hydrolysates at the laboratory scale and, then evaluating the environmental impact associated with this production. Acid treatment was carried out on the hydrolysate in order to make it more accessible to ethanol-producing microorganisms. The cocoa hydrolysate was converted on a laboratory scale into bioethanol. The Ca, Mg, K and Na content of the substrate were respectively 78.4 ± 0.04; 109.59 ± 0.03; 1541.53 ± 0.08 and 195.05 ± 0.12 mg/L. The iron and total phosphorus contents were found to be at 14.06 ± 0.07 and 97.54 ± 0.01 mg/L respectively. The hydrolysate's biochemical oxygen demand (BOD 5) was 1080 ± 0.01 mg/L. A two per cent alcohol yield was obtained from 50 mL of substrate. Environmental impacts were assessed and quantified using SimaPro software version 9.1.1.1, Ecoinvent v.3.6 database, ReCiPe Midpoint v.1.04 method and openLCA sustainable development software. A total of 15 impact factors were assessed and quantified. The categories with more significant impacts in the agricultural phase were land use (1.70 E+04 m2a crop eq), global warming (3.41 E+03 kg CO2eq) and terrestrial ecotoxicity (7.23 E+03 kg 1,4-DCB), which were the major hotspots observed in the lab-scale biomass-to-bioethanol conversion phase due, to the use of electricity, distilled water and chemicals. The result of this work has shown that the cocoa-based hydrolysate is a suitable substrate for the sustainable production of liquid biofuels.
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Affiliation(s)
- Dolvine Nguemfo Dongmo
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | | | - Cyrille Donlifack Atemkeng
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | - Serges Bruno Lemoupi Ngomade
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | - Junie Albine Kenfack Atangana
- Department of Paper Sciences and Bioenergy, University Institute of Wood Technology, University of Yaounde I, Mbalmayo, Cameroon
| | - Rufis Fregue Tiegam Tagne
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, University of Dschang, Dschang, Cameroon
- Department of Paper Sciences and Bioenergy, University Institute of Wood Technology, University of Yaounde I, Mbalmayo, Cameroon
| | - Theophile Kamgaing
- Research Unit of Noxious Chemistry and Environmental Engineering, Department of Chemistry, University of Dschang, Dschang, Cameroon
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12
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Gajaje K, Ultra VU, Nwaefuna AE, Zhou N. Phytostabilization of fly ash from a coalmine in Botswana and biovalorisation of the recovered Napier grass ( Pennisetum purpureum Schumach.). Int J Phytoremediation 2024:1-14. [PMID: 38349237 DOI: 10.1080/15226514.2024.2313559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
The disposal of fly ash (FA) from coal power plants polluting the air, soil, and groundwater is a major environmental concern. Phytoremediation to rehabilitate fly ash dumpsites is a promising alternative but has practical concerns about the disposal of harvested biomass. This study investigated the effect of supplementing fly ash with fresh sewage sludge (FSS), aged sewage sludge, food waste, and compost (COM) to enhance the phytoremediation potential of Napier grass and its subsequent utilization for ethanol production. The highest removal of Mn (1196.12 g ha-1) and Ni (128.06 g ha-1) from FA could be obtained when Napier is grown in the presence of FSS and inorganic fertilizer (NPK). In addition, the highest bioethanol yield (19.31 g L-1) was obtained from Napier grown in fly ash with COM + NPK, thus providing additional economic benefits aside from the remediation process. Given the significant levels of heavy metals present in the pulp and bio-slurry after ethanol production, further research is required in this area to determine the best ways to utilize this waste such as converting it into biochar.
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Affiliation(s)
- Katumelo Gajaje
- Department of Earth and Environmental Science, Botswana International University of Science and Technology, Palapye, Botswana
| | - Venecio U Ultra
- Department of Earth and Environmental Science, Botswana International University of Science and Technology, Palapye, Botswana
| | - Anita E Nwaefuna
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana
| | - Nerve Zhou
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana
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Divyashri G, Tulsi NP, Murthy TPK, Shreyas S, Kavya R, Jaishree IK. Valorization of coffee bean processing waste for bioethanol production: comparison and evaluation of mass transfer effects in fermentations using free and encapsulated cells of Saccharomyces cerevisiae. Bioprocess Biosyst Eng 2024; 47:169-179. [PMID: 38195720 DOI: 10.1007/s00449-023-02961-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 12/09/2023] [Indexed: 01/11/2024]
Abstract
Coffee husk, an agricultural waste abundant in carbohydrates and nutrients, is typically discarded through landfills, mixed with animal fodder, or incinerated. However, in alignment with sustainable development principles, researchers worldwide are exploring innovative methods to harness the value of coffee husk, transforming it into profitable products. One such avenue is the biotechnological approach to bioethanol production from agricultural wastes, offering an eco-friendly alternative to mitigate the adverse effects of fossil fuels. This study delves into the feasibility of utilizing coffee husk as a substrate for bioethanol production, employing and comparing various hydrolysis methods. The enzymatic hydrolysis method outshone thermochemical and thermal approaches, yielding 1.84 and 3.07 times more reducing sugars in the hydrolysate, respectively. In examining bioethanol production, a comparison between free and encapsulated cells in enzyme hydrolysate revealed that free-cell fermentation faced challenges due to cell viability issues. Under specific fermentation conditions, bioethanol yield (0.59 and 0.83 g of bioethanol/g of reducing sugar) and productivity (0.1 and 0.12 g/L h) were achieved for free and encapsulated cells, respectively. However, it was noted that bioethanol production by encapsulated cells was more significantly influenced by internal mass transfer effects, as indicated by the Thiele modulus and effectiveness factor. In conclusion, our findings underscore the potential of coffee husk as a valuable substrate for bioethanol production, showcasing its viability in contributing to sustainable and eco-friendly practices.
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Affiliation(s)
- G Divyashri
- Department of Biotechnology, M S Ramaiah Institute of Technology, Bangalore, 560 054, India.
| | - N P Tulsi
- Department of Biotechnology, M S Ramaiah Institute of Technology, Bangalore, 560 054, India
| | - T P Krishna Murthy
- Department of Biotechnology, M S Ramaiah Institute of Technology, Bangalore, 560 054, India
| | - S Shreyas
- Department of Biotechnology, M S Ramaiah Institute of Technology, Bangalore, 560 054, India
| | - R Kavya
- Department of Biotechnology, M S Ramaiah Institute of Technology, Bangalore, 560 054, India
| | - I K Jaishree
- Department of Biotechnology, M S Ramaiah Institute of Technology, Bangalore, 560 054, India
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Pandey A, Kant G, Chaudhary A, Amesho KTT, Reddy K, Bux F. Axenic green microalgae for the treatment of textile effluent and the production of biofuel: a promising sustainable approach. World J Microbiol Biotechnol 2024; 40:81. [PMID: 38285224 PMCID: PMC10824862 DOI: 10.1007/s11274-023-03863-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/30/2023] [Indexed: 01/30/2024]
Abstract
An integrated approach to nutrient recycling utilizing microalgae could provide feasible solutions for both environmental control and energy production. In this study, an axenic microalgae strain, Chlorella sorokiniana ASK25 was evaluated for its potential as a biofuel feedstock and textile wastewater (TWW) treatment. The microalgae isolate was grown on TWW supplemented with different proportions of standard BG-11 medium varying from 0 to 100% (v/v). The results showed that TWW supplemented with 20% (v/v) BG11 medium demonstrated promising results in terms of Chlorella sorokiniana ASK25 biomass (3.80 g L-1), lipid production (1.24 g L-1), nutrients (N/P, > 99%) and pollutant removal (chemical oxygen demand (COD), 99.05%). The COD level dropped by 90% after 4 days of cultivation, from 2,593.33 mg L-1 to 215 mg L-1; however, after day 6, the nitrogen (-NO3-1) and total phosphorus (TP) levels were reduced by more than 95%. The biomass-, total lipid- and carbohydrate- production, after 6 days of cultivation were 3.80 g L-1, 1.24 g L-1, and 1.09 g L-1, respectively, which were 2.15-, 2.95- and 3.30-fold higher than Chlorella sorokiniana ASK25 grown in standard BG-11 medium (control). In addition, as per the theoretical mass balances, 1 tonne biomass of Chlorella sorokiniana ASK25 might yield 294.5 kg of biodiesel and 135.7 kg of bioethanol. Palmitic acid, stearic acid, and oleic acid were the dominant fatty acids found in the Chlorella sorokiniana ASK25 lipid. This study illustrates the potential use of TWW as a microalgae feedstock with reduced nutrient supplementation (20% of TWW). Thus, it can be considered a promising feedstock for economical biofuel production.
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Affiliation(s)
- Ashutosh Pandey
- Institute for Water and Wastewater Technology, Durban University of Technology, 19 Steve Biko Road, Durban, 4000, South Africa
- BiotechnologyBioenergy Research Laboratory, Department of Biotechnology, AKS University Satna, Satna, MP, 485001, India
| | - Gaurav Kant
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, UP, 211004, India
| | - Ashvani Chaudhary
- Department of Biotechnology, University)IMS Engineering College (Affiliated to Dr. APJ Abdul Kalam Technical University, Lucknow), Lucknow, Ghaziabad, UP, 201015, India
- Amity Institute of Biotechnology, Amity University Noida Campus, Sec-125, Noida, 201313, UP, India
| | - Kaissan T T Amesho
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan
- Centre for Emerging Contaminants Research, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan
- Centre for Environmental Studies, The International University of Management, Main Campus, Dorado Park Ext 1, Windhoek, 10001, Namibia
| | - Karen Reddy
- Institute for Water and Wastewater Technology, Durban University of Technology, 19 Steve Biko Road, Durban, 4000, South Africa
| | - Faizal Bux
- Institute for Water and Wastewater Technology, Durban University of Technology, 19 Steve Biko Road, Durban, 4000, South Africa.
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Wu Y, Su C, Liao Z, Zhang G, Jiang Y, Wang Y, Zhang C, Cai D, Qin P, Tan T. Sequential catalytic lignin valorization and bioethanol production: an integrated biorefinery strategy. Biotechnol Biofuels Bioprod 2024; 17:8. [PMID: 38245804 PMCID: PMC10800047 DOI: 10.1186/s13068-024-02459-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 01/06/2024] [Indexed: 01/22/2024]
Abstract
BACKGROUND The effective valorization of lignin and carbohydrates in lignocellulose matrix under the concept of biorefinery is a primary strategy to produce sustainable chemicals and fuels. Based on the reductive catalytic fractionation (RCF), lignin in lignocelluloses can be depolymerized into viscous oils, while the highly delignified pulps with high polysaccharides retention can be transformed into various chemicals. RESULTS A biorefinery paradigm for sequentially valorization of the main components in poplar sawdust was constructed. In this process, the well-defined low-molecular-weight phenols and bioethanol were co-generated by tandem chemo-catalysis in the RCF stage and bio-catalysis in fermentation stage. In the RCF stage, hydrogen transfer reactions were conducted in one-pot process using Raney Ni as catalyst, while the isopropanol (2-PrOH) in the initial liquor was served as a hydrogen donor and the solvent for lignin dissolution. Results indicated the proportion of the 2-PrOH in the initial liquor of RCF influenced the chemical constitution and yield of the lignin oil, which also affected the characteristics of the pulps and the following bioethanol production. A 67.48 ± 0.44% delignification with 20.65 ± 0.31% of monolignols yield were realized when the 2-PrOH:H2O ratio in initial liquor was 7:3 (6.67 wt% of the catalyst loading, 200 °C for 3 h). The RCF pulp had higher carbohydrates retention (57.96 ± 2.78 wt%), which was converted to 21.61 ± 0.62 g/L of bioethanol with a yield of 0.429 ± 0.010 g/g in fermentation using an engineered S. cerevisiae strain. Based on the mass balance analysis, 104.4 g of ethanol and 206.5 g of lignin oil can be produced from 1000 g of the raw poplar sawdust. CONCLUSIONS The main chemical components in poplar sawdust can be effectively transformed into lignin oil and bioethanol. The attractive results from the biorefinery process exhibit great promise for the production of valuable biofuels and chemicals from abundant lignocellulosic materials.
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Affiliation(s)
- Yilu Wu
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Changsheng Su
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Zicheng Liao
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Gege Zhang
- School of International Education, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Yongjie Jiang
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Yankun Wang
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Changwei Zhang
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Di Cai
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China.
| | - Peiyong Qin
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Tianwei Tan
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
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16
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Ahlawat YK, Biswal AK, Harun S, Harman-Ware AE, Doeppke C, Sharma N, Joshi CP, Hankoua BB. Heterologous expression of Arabidopsis laccase2, laccase4 and peroxidase52 driven under developing xylem specific promoter DX15 improves saccharification in populus. Biotechnol Biofuels Bioprod 2024; 17:5. [PMID: 38218877 PMCID: PMC10787383 DOI: 10.1186/s13068-023-02452-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 12/19/2023] [Indexed: 01/15/2024]
Abstract
BACKGROUND Secondary cell wall holds considerable potential as it has gained immense momentum to replace the lignocellulosic feedstock into fuels. Lignin one of the components of secondary cell wall tightly holds the polysaccharides thereby enhancing the recalcitrance and complexity in the biomass. Laccases (LAC) and peroxidases (PRX) are the major phenyl-oxidases playing key functions during the polymerization of monolignols into lignin. Yet, the functions of laccase and peroxidases gene families remained largely unknown. Hence, the objective of this conducted study is to understand the role of specific LAC and PRX in Populus wood formation and to further investigate how the altered Lac and Prx expression affects biomass recalcitrance and plant growth. This study of heterologous expression of Arabidopsis Lac and Prx genes was conducted in poplar to avoid any otherwise occurring co-suppression mechanism during the homologous overexpression of highly expressed native genes. In the pursuit of optimizing lignocellulosic biomass for biofuel production, the present study focuses on harnessing the enzymatic potential of Arabidopsis thaliana Laccase2, Laccase4, and Peroxidase52 through heterologous expression. RESULTS We overexpressed selected Arabidopsis laccase2 (AtLac2), laccase4 (AtLac4), and peroxidase52 (AtPrx52) genes, based on their high transcript expression respective to the differentiating xylem tissues in the stem, in hybrid poplar (cv. 717) expressed under the developing xylem tissue-specific promoter, DX15 characterized the transgenic populus for the investigation of growth phenotypes and recalcitrance efficiency. Bioinformatics analyses conducted on AtLac2 and AtLac4 and AtPrx52, revealed the evolutionary relationship between the laccase gene and peroxidase gene homologs, respectively. Transgenic poplar plant lines overexpressing the AtLac2 gene (AtLac2-OE) showed an increase in plant height without a change in biomass yield as compared to the controls; whereas, AtLac4-OE and AtPrx52-OE transgenic lines did not show any such observable growth phenotypes compared to their respective controls. The changes in the levels of lignin content and S/G ratios in the transgenic poplar resulted in a significant increase in the saccharification efficiency as compared to the control plants. CONCLUSIONS Overall, saccharification efficiency was increased by 35-50%, 21-42%, and 8-39% in AtLac2-OE, AtLac4-OE, and AtPrx52-OE transgenic poplar lines, respectively, as compared to their controls. Moreover, the bioengineered plants maintained normal growth and development, underscoring the feasibility of this approach for biomass improvement without compromising overall plant fitness. This study also sheds light on the potential of exploiting regulatory elements of DX15 to drive targeted expression of lignin-modifying enzymes, thereby providing a promising avenue for tailoring biomass for improved biofuel production. These findings contribute to the growing body of knowledge in synthetic biology and plant biotechnology, offering a sustainable solution to address the challenges associated with lignocellulosic biomass recalcitrance.
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Affiliation(s)
- Yogesh K Ahlawat
- Department of Biological Sciences, Michigan Technological University, Houghton, MI, 49931, USA
| | - Ajaya K Biswal
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA30602, USA
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA30602, USA
| | - Sarahani Harun
- Centre for Bioinformatics Research, Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia, UKM Bangi, Selangor, Malaysia
| | - Anne E Harman-Ware
- Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Crissa Doeppke
- Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Nisha Sharma
- Microbiology Section, Department of Basic Science, Dr. Y.S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh, India
| | - Chandrashekhar P Joshi
- Department of Biological Sciences, Michigan Technological University, Houghton, MI, 49931, USA.
| | - Bertrand B Hankoua
- Human Ecology Department, College of Agriculture, Science, and Technology (CAST), Food Science and Biotechnology Program, 1200 N. DuPont Highway, Dover, DE, 19901, USA.
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17
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Xu Y, Luo B, Jia R, Xiao J, Wang X, Yang Y, Xue S, Zeng Z, Brown RW, Zang H. Quantifying synergies and trade-offs in the food-energy-soil-environment nexus under organic fertilization. J Environ Manage 2024; 349:119526. [PMID: 37956518 DOI: 10.1016/j.jenvman.2023.119526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/15/2023]
Abstract
Recycling livestock manure in agroecosystems can maintain crop production, improve soil fertility, and reduce environmental losses. However, there has been no comprehensive assessment of synergies and trade-offs in the food-energy-soil-environment nexus under manure application. Here, we evaluate the sustainability of maize production under four fertilization regimes (mineral, mineral and manure mixed, manure, and no fertilization) from the aspect of food security, energy output, soil quality, and environmental impact based on a five-year field experiment. Manure and mineral mixed fertilization maintained grain and straw quantity and quality compared with mineral fertilization. Manure and mineral mixed fertilization increased stem/leaf ratio and field residue index by 9.1-28.9% and 4.5-17.9%, respectively. Manure also maintained the theoretical ethanol yield but reduced the straw biomass quality index by increasing ash. Further, manure application increased the soil quality index by 40.5% and reduced N2O emissions by 55.0% compared with mineral fertilization. Manure application showed the highest sustainability performance index of 19, followed by mineral (15), mixed (13), and without fertilization (8). In conclusion, manure application maintains food production and energy output, enhances soil quality, and reduces environmental impact, thereby improving the sustainability of maize production.
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Affiliation(s)
- Yi Xu
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Bolun Luo
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Rong Jia
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Jing Xiao
- College of Bioscience & Biotechnology, Hunan Agricultural University, Changsha, China
| | - Xiquang Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Yadong Yang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Shuai Xue
- College of Bioscience & Biotechnology, Hunan Agricultural University, Changsha, China
| | - Zhaohai Zeng
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Robert W Brown
- School of Natural Sciences, Bangor University, Bangor, Gwynedd, LL57 2UW, UK
| | - Huadong Zang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China.
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18
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Sharker B, Islam MA, Hossain MAA, Ahmad I, Al Mamun A, Ghosh S, Rahman A, Hossain MS, Ashik MA, Hoque MR, Hossain MK, M Al Mamun, Haque MA, Patel H, Prodhan MY, Bhattacharya P, Haque MA. Characterization of lignin and hemicellulose degrading bacteria isolated from cow rumen and forest soil: Unveiling a novel enzymatic model for rice straw deconstruction. Sci Total Environ 2023; 904:166704. [PMID: 37657552 DOI: 10.1016/j.scitotenv.2023.166704] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/22/2023] [Accepted: 08/28/2023] [Indexed: 09/03/2023]
Abstract
Application of greener pretreatment technology using robust ligninolytic bacteria for short duration to deconstruct rice straw and enhance bioethanol production is currently lacking. The objective of this study is to characterize three bacterial strains isolated from the milieux of cow rumen and forest soil and explore their capabilities of breaking down lignocellulose - an essential process in bioethanol production. Using biochemical and genomic analyses these strains were identified as Bacillus sp. HSTU-bmb18, Bacillus sp. HSTU-bmb19, and Citrobacter sp. HSTU-bmb20. Genomic analysis of the strains unveiled validated model hemicellulases, multicopper oxidases, and pectate lyases. These enzymes exhibited interactions with distinct lignocellulose substrates, further affirmed by their stability in molecular dynamic simulations. A comprehensive expression of ligninolytic pathways, including β-ketoadipate, phenyl acetate, and benzoate, was observed within the HSTU-bmb20 genome. The strains secreted approximately 75-82 U/mL of cellulase, xylase, pectinase, and lignin peroxidase. FT-IR analysis of the bacterial treated rice straw fibers revealed that the intensity of lignin-related peaks decreased, while cellulose-related peaks sharpened. The values of crystallinity index for the untreated control and the treated rice straw with either HSTU-bmb18, or HSTU-bmb19, or HSTU-bmb20 were recorded to be 34.48, 28.49, 29.36, 31.75, respectively, which are much higher than that of 13.53 noted for those treated with the bacterial consortium. The ratio of fermentable cellulose in rice straw increased by 1.25-, 1.79-, 1.93- and 2.17-fold following treatments with HSTU-bmb18, HSTU-bmb20, HSTU-bmb19, and a mixed consortium of these three strains, respectively. These aggregative results suggested a novel model for rice straw deconstruction utilizing hydrolytic enzymes of the consortium, revealing superior efficacy compared to individual strains, and advancing cost-effective, affordable, and sustainable green technology.
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Affiliation(s)
- Bishal Sharker
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Md Aminul Islam
- Advanced Molecular Lab, Department of Microbiology, President Abdul Hamid Medical College, Karimganj-2310, Kishoreganj, Bangladesh; COVID-19 Diagnostic Lab, Department of Microbiology, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Md Al Amin Hossain
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Iqrar Ahmad
- Department of Pharmaceutical Chemistry, Prof. Ravindra Nikam College of Pharmacy, Gondur, Dhule, 424002, India
| | - Abdullah Al Mamun
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Sibdas Ghosh
- Department of Biological Sciences, College of Arts and Sciences, Carlow University, 3333 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Aminur Rahman
- Department of Biomedical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Md Shohorab Hossain
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh; Department of Biochemistry and Molecular Biology, Trust University, Barishal, Bangladesh
| | - Md Ashikujjaman Ashik
- Department of Biochemistry and Molecular Biology, Trust University, Barishal, Bangladesh
| | - Md Rayhanul Hoque
- Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh
| | - Md Khalid Hossain
- Institute of Electronics, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, Dhaka 1349, Bangladesh
| | - M Al Mamun
- Materials Science Division, Atomic Energy Centre Dhaka, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh
| | - Md Atiqul Haque
- Department of Microbiology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh; Key Lab of Animal Epidemiology and Zoonoses of Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Harun Patel
- Division of Computer Aided Drug Design, Department of Pharmaceutical Chemistry, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, 425405, Maharashtra, India
| | - Md Yeasin Prodhan
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Prosun Bhattacharya
- COVID-19 Research, Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, SE 10044 Stockholm, Sweden.
| | - Md Azizul Haque
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.
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19
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Maharjan A, Choi W, Kim HT, Park JH. Catalytic hydrolysis of agar using magnetic nanoparticles: optimization and characterization. Biotechnol Biofuels Bioprod 2023; 16:193. [PMID: 38093358 PMCID: PMC10720145 DOI: 10.1186/s13068-023-02441-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 11/27/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND Agar is used as a gelling agent that possesses a variety of biological properties; it consists of the polysaccharides agarose and porphyrin. In addition, the monomeric sugars generated after agar hydrolysis can be functionalized for use in biorefineries and biofuel production. The main objective of this study was to develop a sustainable agar hydrolysis process for bioethanol production using nanotechnology. Peroxidase-mimicking Fe3O4-MNPs were applied for agar degradation to generate agar hydrolysate-soluble fractions amenable to Saccharomyces cerevisiae and Escherichia coli during fermentation. RESULTS Fe3O4-MNP-treated (Fe3O4-MNPs, 1 g/L) agar exhibited 0.903 g/L of reducing sugar, which was 21-fold higher than that of the control (without Fe3O4-MNP-treated). Approximately 0.0181% and 0.0042% of ethanol from 1% of agar was achieved using Saccharomyces cerevisiae and Escherichia coli, respectively, after process optimization. Furthermore, different analytical techniques (FTIR, SEM, TEM, EDS, XRD, and TGA) were applied to validate the efficiency of Fe3O4-MNPs in agar degradation. CONCLUSIONS To the best of our knowledge, Fe3O4-MNP-treated agar degradation for bioethanol production through process optimization is a simpler, easier, and novel method for commercialization.
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Affiliation(s)
- Anoth Maharjan
- Bio-Evaluation Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, 28116, Republic of Korea
| | - Wonho Choi
- 4D Convergence Technology Institute (National Key Technology Institute in University), Korea National University of Transportation, Jungpyeong, 27909, Republic of Korea
| | - Hee Taek Kim
- Department of Food Science and Technology, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Jung-Ho Park
- Bio-Evaluation Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju, 28116, Republic of Korea.
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-Ro, Yuseong-Gu, Daejeon, Korea.
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20
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Hung YHR, Chae M, Sauvageau D, Bressler DC. Adapted feeding strategies in fed-batch fermentation improve sugar delivery and ethanol productivity. Bioengineered 2023; 14:2250950. [PMID: 37655550 PMCID: PMC10478740 DOI: 10.1080/21655979.2023.2250950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/16/2023] [Accepted: 05/25/2023] [Indexed: 09/02/2023] Open
Abstract
Bioethanol is a renewable fuel widely used in road transportation and is generally regarded as a clean energy source. Although fermentation is one of the major processes in bioethanol production, studies on improving its efficiency through operational design are limited, especially compared to other steps (pretreatment and hydrolysis/saccharification). In this study, two adapted feeding strategies, in which feed medium addition (sugar delivery) was adjusted to increase the supply of fermentable sugar, were developed to improve ethanol productivity in 5-L fed-batch fermentation by Saccharomyces cerevisiae. Specifically, a linear adapted feeding strategy was established based on changes in cell biomass, and an exponential adapted feeding strategy was developed based on cell biomass accumulation. By implementing these two feeding strategies, the overall ethanol productivity reached 0.88± 0.04 and 0.87± 0.06 g/L/h, respectively. This corresponded to ~20% increases in ethanol productivity compared to fixed pulsed feeding operations. Additionally, there was no residual glucose at the end of fermentation, and final ethanol content reached 95± 3 g/L under the linear adapted operation and 104± 3 g/L under the exponential adapted feeding strategy. No statistical difference was observed in the overall ethanol yield (ethanol-to-sugar ratio) between fixed and adapted feeding strategies (~91%). These results demonstrate that sugar delivery controlled by adapted feeding strategies was more efficient than fixed feeding operations, leading to higher ethanol productivity. Overall, this study provides novel adapted feeding strategies to improve sugar delivery and ethanol productivity. Integration into the current practices of the ethanol industry could improve productivity and reduce production costs of fermentation processes.
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Affiliation(s)
- Yueh-Hao Ronny Hung
- Department of Agricultural, Food & Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
| | - Michael Chae
- Department of Agricultural, Food & Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
| | - Dominic Sauvageau
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - David C. Bressler
- Department of Agricultural, Food & Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
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21
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Sheikh ZUD, Bajar S, Devi A, Rose PK, Suhag M, Yadav A, Yadav DK, Deswal T, Kaur J, Kothari R, Pathania D, Rani N, Singh A. Nanotechnology based technological development in biofuel production: Current status and future prospects. Enzyme Microb Technol 2023; 171:110304. [PMID: 37639935 DOI: 10.1016/j.enzmictec.2023.110304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 07/11/2023] [Accepted: 08/05/2023] [Indexed: 08/31/2023]
Abstract
Depleting fossil fuels and net carbon emissions associated with their burning have driven the need to find alternative energy sources. Biofuels are near-perfect candidates for alternative energy sources as they are renewable and account for no net CO2 emissions. However, biofuel production must overcome various challenges to compete with conventional fuels. Conventional methods for bioconversion of biomass to biofuel include chemical, thermochemical, and biological processes. Substrate selection and processing, low yield, and total cost of production are some of the main issues associated with biofuel generation. Recently, the uses of nanotechnology and nanoparticles have been explored to improve the biofuel production processes because of their high adsorption, high reactivity, and catalytic properties. The role of these nanoscale particles and nanocatalysts in biomass conversion and their effect on biofuel production processes and yield are discussed in the present article. The applicability of nanotechnology in production processes of biobutanol, bioethanol, biodiesel, biohydrogen, and biogas under biorefinery approach are presented. Different types of nanoparticles, and their function in the bioprocess, such as electron transfer, pretreatment, hydrolysis, microalgae cultivation, lipid extraction, dark and photo fermentation, immobilization, and suppression of inhibitory compounds, are also highlighted. Finally, the current and potential applications of nanotechnology in biorefineries are also discussed.
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Affiliation(s)
- Zaheer Ud Din Sheikh
- Department of Environmental Sciences, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Somvir Bajar
- Department of Environmental Science and Engineering, J.C. Bose University of Science and Technology, YMCA, Faridabad, 121006, Haryana, India
| | - Arti Devi
- Department of Environmental Sciences, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Pawan Kumar Rose
- Department of Energy and Environmental Sciences, Chaudhary Devi Lal University, Sirsa, 125055, Haryana, India
| | - Meenakshi Suhag
- Institute of Environmental Studies, Kurukshetra University, Kurukshetra, India
| | - Arti Yadav
- Department of Environmental Science & Engineering, Guru Jambheshwar University of Science & Technology, Hisar, 125001, Haryana, India
| | - Deepak Kumar Yadav
- Department of Environmental Science & Engineering, Guru Jambheshwar University of Science & Technology, Hisar, 125001, Haryana, India
| | - Tanuj Deswal
- Department of Nano Science and Materials, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Japleen Kaur
- Department of Environmental Sciences, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Richa Kothari
- Department of Environmental Sciences, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Deepak Pathania
- Department of Environmental Sciences, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Neeta Rani
- Department of National Security Studies, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India
| | - Anita Singh
- Department of Environmental Sciences, Central University of Jammu, Samba, 181143, Jammu and Kashmir, India; Department of Environmental Studies, Central University of Haryana, Jant-Pali, Mahendergarh, 12331, Haryana, India.
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22
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Bitew D, Tesfaye A, Andualem B. Isolation, screening and identification of ethanol producing yeasts from Ethiopian fermented beverages. Biotechnol Rep (Amst) 2023; 40:e00815. [PMID: 37876548 PMCID: PMC10590766 DOI: 10.1016/j.btre.2023.e00815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/25/2023] [Accepted: 10/02/2023] [Indexed: 10/26/2023]
Abstract
The growing demand for renewable energy sources such as bioethanol is facing a lack of efficient ethanologenic microbes. This study aimed to isolate and screen ethanologenic yeasts from Ethiopian fermented beverages. A progressive screening and selection approach was employed. Selected isolates were evaluated for bioethanol production using banana peel waste as substrate. A total of 102 isolates were obtained. Sixteen isolates were selected based on their tolerance to stress conditions and carbohydrate fermentation and assimilation capacity. Most found moderately tolerant to 10 %, but slightly tolerant at 15 and 20 % (v/v) ethanol concentration. They yield 15.3 to 20.1 g/L and 9.1 ± 0.6 to 12.9 ± 1.3 g/L ethanol from 2 % (w/v) glucose and 80 g/L banana peel, respectively. Molecular characterization identified them as Saccharomyces cerevisiae strains. Results demonstrate insight about their potential role in the ethanol industry. Optimization of the fermentation conditions is recommended.
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Affiliation(s)
- Dagnew Bitew
- Department of Biology, Mizan-Tepi University, P. BOX: 260, Ethiopia
- Institute of Biotechnology, University of Gondar, P.BOX: 196, Ethiopia
| | - Anteneh Tesfaye
- Institute of Biotechnology, Addis Ababa University, P.BOX: 1176, Ethiopia
- BioTEI, Winnipeg, Manitoba, Canada
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23
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Vargas BDO, dos Santos JR, Pereira GAG, de Mello FDSB. An atlas of rational genetic engineering strategies for improved xylose metabolism in Saccharomyces cerevisiae. PeerJ 2023; 11:e16340. [PMID: 38047029 PMCID: PMC10691383 DOI: 10.7717/peerj.16340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 10/03/2023] [Indexed: 12/05/2023] Open
Abstract
Xylose is the second most abundant carbohydrate in nature, mostly present in lignocellulosic material, and representing an appealing feedstock for molecule manufacturing through biotechnological routes. However, Saccharomyces cerevisiae-a microbial cell widely used industrially for ethanol production-is unable to assimilate this sugar. Hence, in a world with raising environmental awareness, the efficient fermentation of pentoses is a crucial bottleneck to producing biofuels from renewable biomass resources. In this context, advances in the genetic mapping of S. cerevisiae have contributed to noteworthy progress in the understanding of xylose metabolism in yeast, as well as the identification of gene targets that enable the development of tailored strains for cellulosic ethanol production. Accordingly, this review focuses on the main strategies employed to understand the network of genes that are directly or indirectly related to this phenotype, and their respective contributions to xylose consumption in S. cerevisiae, especially for ethanol production. Altogether, the information in this work summarizes the most recent and relevant results from scientific investigations that endowed S. cerevisiae with an outstanding capability for commercial ethanol production from xylose.
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Affiliation(s)
- Beatriz de Oliveira Vargas
- Department of Genetics, Evolution, Microbiology, and Immunology, Institute of Biology, Universidade Estadual de Campinas, Campinas, Brazil
| | - Jade Ribeiro dos Santos
- Department of Genetics, Evolution, Microbiology, and Immunology, Institute of Biology, Universidade Estadual de Campinas, Campinas, Brazil
| | - Gonçalo Amarante Guimarães Pereira
- Department of Genetics, Evolution, Microbiology, and Immunology, Institute of Biology, Universidade Estadual de Campinas, Campinas, Brazil
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24
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van Aalst ACA, van der Meulen IS, Jansen MLA, Mans R, Pronk JT. Co-cultivation of Saccharomyces cerevisiae strains combines advantages of different metabolic engineering strategies for improved ethanol yield. Metab Eng 2023; 80:151-162. [PMID: 37751790 DOI: 10.1016/j.ymben.2023.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 09/28/2023]
Abstract
Glycerol is the major organic byproduct of industrial ethanol production with the yeast Saccharomyces cerevisiae. Improved ethanol yields have been achieved with engineered S. cerevisiae strains in which heterologous pathways replace glycerol formation as the predominant mechanism for anaerobic re-oxidation of surplus NADH generated in biosynthetic reactions. Functional expression of heterologous phosphoribulokinase (PRK) and ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) genes enables yeast cells to couple a net oxidation of NADH to the conversion of glucose to ethanol. In another strategy, NADH-dependent reduction of exogenous acetate to ethanol is enabled by introduction of a heterologous acetylating acetaldehyde dehydrogenase (A-ALD). This study explores potential advantages of co-cultivating engineered PRK-RuBisCO-based and A-ALD-based strains in anaerobic bioreactor batch cultures. Co-cultivation of these strains, which in monocultures showed reduced glycerol yields and improved ethanol yields, strongly reduced the formation of acetaldehyde and acetate, two byproducts that were formed in anaerobic monocultures of a PRK-RuBisCO-based strain. In addition, co-cultures on medium with low acetate-to-glucose ratios that mimicked those in industrial feedstocks completely removed acetate from the medium. Kinetics of co-cultivation processes and glycerol production could be optimized by tuning the relative inoculum sizes of the two strains. Co-cultivation of a PRK-RuBisCO strain with a Δgpd1 Δgpd2 A-ALD strain, which was unable to grow in the absence of acetate and evolved for faster anaerobic growth in acetate-supplemented batch cultures, further reduced glycerol formation but led to extended fermentation times. These results demonstrate the potential of using defined consortia of engineered S. cerevisiae strains for high-yield, minimal-waste ethanol production.
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Affiliation(s)
- Aafke C A van Aalst
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
| | - Igor S van der Meulen
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
| | - Mickel L A Jansen
- DSM Biotechnology Centre, Alexander Fleminglaan 1, 2613, AX, Delft, the Netherlands
| | - Robert Mans
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands
| | - Jack T Pronk
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629, HZ, Delft, the Netherlands.
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25
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Wang C, Zhang X, Zhao G, Chen Y. Mechanisms, methods and applications of machine learning in bio-alcohol production and utilization: A review. Chemosphere 2023; 342:140191. [PMID: 37716556 DOI: 10.1016/j.chemosphere.2023.140191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/18/2023]
Abstract
Bio-alcohols have been proven promising alternatives to fossil fuels. Machine learning (ML), as an analytical tool for uncovering intrinsic correlations and mining data connotations, is also becoming widely used in the field of bio-alcohols. This article reviews the mechanisms, methods, and applications of ML in the bio-alcohols field. In terms of mechanisms, we describe the workflow of ML applications, emphasizing the importance of a well-defined research problem and complete feature engineering for a robust model. Prediction and optimization are the main application scenarios. In terms of methods, we illustrate the characteristics of different ML models and analyze their applicability in the bio-alcohol field. The role of ML in the production of bio-methanol by pyrolysis and gasification, as well as in the three stages of fermentation for bioethanol production are highlighted. In terms of utilization, ML is used to optimize engine performance and reduce emissions. This review provides guidance on how to use novel ML methods in the bio-alcohol field, showing the potential of ML to streamline work in the whole biofuel field.
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Affiliation(s)
- Chen Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Xuemeng Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Guohua Zhao
- School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
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26
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Messaoudi Y, Smichi N, Allaf T, Besombes C, Allaf K, Gargouri M. Instant Controlled Pressure-Drop (DIC) for Volatile Compound Extraction and Bioethanol Production from Empty Aleppo Pinecones and Eucalyptus Chips: Process Optimization and Statistical Modeling. Appl Biochem Biotechnol 2023; 195:7086-7109. [PMID: 36988842 DOI: 10.1007/s12010-023-04437-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2023] [Indexed: 03/30/2023]
Abstract
Several plant species contain volatile compounds extracted as "essential oils" through different technologies. After essential oil extraction, the residual solid is a lignocellulosic solid waste. This work proposes the instant controlled pressure-drop (DIC) technology to autovaporize volatile compounds and modify the lignocellulosic matrix. Indeed, DIC technology is a thermomechanical process based on short-time/high-temperature and pressure pretreatment. It enhances the saccharification and fermentation process (SSF) for bioethanol production. A 3-variable design of experiments optimized the DIC processing parameters to reach 100% efficiency (EE) of volatile compound extraction using response surface methodology (RSM). Eucalyptus chips presented 50 volatile identified compounds after 7 min of DIC treatment. 1,8-Cineole, β-phellandrene, aromadendrene, eudesmol, and spathulenol are the most important volatile compounds. The empty Aleppo pinecones delivered 32 volatile compounds in 5 min of DIC treatment, the most important of which were caryophyllene, nortricyclene, verbenol, and camphor. After the autovaporization extraction stage, solid fraction residues were hydrolyzed and fermented in the same stirred bioreactor, using SSF strategy for 72 h at 37 °C. The highest bioethanol yields reached 73.9% and 54.82% (g per 100 g DM) from eucalyptus chip and empty Aleppo pinecone, respectively.
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Affiliation(s)
- Yosra Messaoudi
- Biocatalysis and Industrial Enzymes Group, Laboratory of Microbial Ecology and Technology, Carthage University, National Institute of Applied Sciences and Technology, BP 676, 1080, Tunis Cedex, Tunis, Tunisia.
| | - Neila Smichi
- Biocatalysis and Industrial Enzymes Group, Laboratory of Microbial Ecology and Technology, Carthage University, National Institute of Applied Sciences and Technology, BP 676, 1080, Tunis Cedex, Tunis, Tunisia
| | | | - Colette Besombes
- Laboratory of Engineering Science and Technology for Environment (LaSIE), La Rochelle University, 17042, La Rochelle, France
| | - Karim Allaf
- Laboratory of Engineering Science and Technology for Environment (LaSIE), La Rochelle University, 17042, La Rochelle, France
| | - Mohamed Gargouri
- Biocatalysis and Industrial Enzymes Group, Laboratory of Microbial Ecology and Technology, Carthage University, National Institute of Applied Sciences and Technology, BP 676, 1080, Tunis Cedex, Tunis, Tunisia
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27
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Minnaar L, den Haan R. Engineering natural isolates of Saccharomyces cerevisiae for consolidated bioprocessing of cellulosic feedstocks. Appl Microbiol Biotechnol 2023; 107:7013-7028. [PMID: 37688599 PMCID: PMC10589140 DOI: 10.1007/s00253-023-12729-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/03/2023] [Accepted: 08/06/2023] [Indexed: 09/11/2023]
Abstract
Saccharomyces cerevisiae has gained much attention as a potential host for cellulosic bioethanol production using consolidated bioprocessing (CBP) methodologies, due to its high-ethanol-producing titres, heterologous protein production capabilities, and tolerance to various industry-relevant stresses. Since the secretion levels of heterologous proteins are generally low in domesticated strains of S. cerevisiae, natural isolates may offer a more diverse genetic background for improved heterologous protein secretion, while also displaying greater robustness to process stresses. In this study, the potential of natural and industrial S. cerevisiae strains to secrete a core set of cellulases (CBH1, CBH2, EG2, and BGL1), encoded by genes integrated using CRISPR/Cas9 tools, was evaluated. High levels of heterologous protein production were associated with a reduced maximal growth rate and with slight changes in overall strain robustness, compared to the parental strains. The natural isolate derivatives YI13_BECC and YI59_BECC displayed superior secretion capacity for the heterologous cellulases at high incubation temperature and in the presence of acetic acid, respectively, compared to the reference industrial strain MH1000_BECC. These strains also exhibited multi-tolerance to several fermentation-associated and secretion stresses. Cultivation of the strains on crystalline cellulose in oxygen-limited conditions yielded ethanol concentrations in the range of 4-4.5 g/L, representing 35-40% of the theoretical maximum ethanol yield after 120 h, without the addition of exogenous enzymes. This study therefore highlights the potential of these natural isolates to be used as chassis organisms in CBP bioethanol production. KEY POINTS: • Process-related fermentation stresses influence heterologous protein production. • Transformants produced up to 4.5 g/L ethanol, ~ 40% of the theoretical yield in CBP. • CRISPR/Cas9 was feasible for integrating genes in natural S. cerevisiae isolates.
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Affiliation(s)
- Letitia Minnaar
- Department of Biotechnology, University of the Western Cape, Bellville, South Africa
| | - Riaan den Haan
- Department of Biotechnology, University of the Western Cape, Bellville, South Africa.
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28
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Deshmukh MP, Pande A, Choudhari V, Pendse DS. Investigation of bioethanol production from jatropha deoiled cake and its blending effects for environmental sustainability. Environ Sci Pollut Res Int 2023; 30:103640-103651. [PMID: 37688707 DOI: 10.1007/s11356-023-29614-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 08/27/2023] [Indexed: 09/11/2023]
Abstract
This paper describes the process of extracting ethanol from Jatropha curcas and its various blending effects on spark-ignited engine performance for environmental sustainability. Alternatives to conventional fuel sources have to be found because of the depletion of fossil fuels and stringent regulations. Every day, the growing population and improved transportation increase the energy demand. Bioethanol is an effective substitute for gasoline and SI engine diesel. Worldwide, passenger cars typically blend 10% bioethanol with gasoline. Some nations, like India, have stated plans to blend 20% bioethanol with gasoline starting shortly. From leftover jatropha deoiled cake (JDC), bioethanol was produced utilizing the fermentation and vacuum distillation methods. Four different blends were prepared on a volumetric basis at different engine speeds at a constant compression ratio of 10:1 and the wide-open throttle was tested for various performances and emissions. Bioethanol enrichments reduce CO and CO2 emissions but increase nitrogen oxide emissions. JDCE 15 was found to have the best engine performance out of all the fuel blends tested. This study suggests that, if NOx emission reduction measures are carried out, JDC can be used as a source for the manufacturing of second-generation bioethanol.
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Affiliation(s)
- Minal P Deshmukh
- School of Petroleum Engineering, MIT World Peace University, Paud Road, Kothrud, Pune, 411038, India.
| | - Ashwini Pande
- School of Petroleum Engineering, MIT World Peace University, Paud Road, Kothrud, Pune, 411038, India
| | - Vishnu Choudhari
- School of Health Sciences and Technology, MIT World Peace University, Paud Road, Kothrud, Pune, 411038, India
| | - Dhanashri S Pendse
- School of Chemical Engineering, MIT World Peace University, Paud Road, Kothrud, Pune, 411038, India
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29
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J Ashwini John, Selvarajan E. Genomic analysis of lignocellulolytic enzyme producing novel Streptomyces sp.MS2A for the bioethanol applications. Int J Biol Macromol 2023; 250:126138. [PMID: 37558017 DOI: 10.1016/j.ijbiomac.2023.126138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/22/2023] [Accepted: 08/02/2023] [Indexed: 08/11/2023]
Abstract
The conversion of lignocellulosic waste to energy offers a cost-effective biofuel. The current study discusses the utilization of cellulose in rice husks by lichen-associated Streptomyces sp. MS2A via carbohydrate metabolism. Out of 39 actinobacteria, one actinobacterial strain MS2A, showed CMCase, FPase, and cellobiohydrolase activity. The whole genome analysis of Streptomyces sp. MS2A showed maximum similarity with Streptomyces sp. CCM_MD2014. The genome analysis confirmed the presence of cellulose-degrading genes along with xylan-degrading genes that code for GH3, GH6, GH9, GH11, GH43, GH51, and 15 other GH families with glycosyl transferase, carbohydrate-binding modules, and energy metabolism groups. Protein family analysis corroborates the enzyme family. Among the 19,402 genes of Streptomyces sp. MS2A, approximately 70 GH family codes for lignocellulose degradation enzymes. The structure of cellulase was modeled and validated. Scanning electron microscopy and gas chromatography-mass spectrometry (GCMS) was performed to analyze the lignocellulosic degradation of rice husk and the end product bioethanol.
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Affiliation(s)
- J Ashwini John
- Department of Genetic Engineering, School of Bioengineering, Faculty of Engineering and Technology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur 603203, India..
| | - Ethiraj Selvarajan
- Department of Genetic Engineering, School of Bioengineering, Faculty of Engineering and Technology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur 603203, India..
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30
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Patel MH, Lu SY, Liu S, Skory CD. Novel endolysin LysMP for control of Limosilactobacillus fermentum contamination in small-scale corn mash fermentation. Biotechnol Biofuels Bioprod 2023; 16:144. [PMID: 37775769 PMCID: PMC10541714 DOI: 10.1186/s13068-023-02400-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/18/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND Traditional bioethanol fermentation industries are not operated under strict sterile conditions and are prone to microbial contamination. Lactic acid bacteria (LAB) are often pervasive in fermentation tanks, competing for nutrients and producing inhibitory acids that have a negative impact on ethanol-producing yeast, resulting in decreased yields and stuck fermentations. Antibiotics are frequently used to combat contamination, but antibiotic stewardship has resulted in a shift to alternative antimicrobials. RESULTS We demonstrate that endolysin LysMP, a bacteriophage-encoded peptidoglycan hydrolase, is an effective method for controlling growth of LAB. The LysMP gene was synthesized based on the prophage sequence in the genome of Limosilactobacillus fermentum KGL7. Analysis of the recombinant enzyme expressed in E. coli and purified by immobilized metal chelate affinity chromatography (IMAC) showed an optimal lysis activity against various LAB species at pH 6, with stability from pH 4 to 8 and from 20 to 40 °C up to 48 h. Moreover, it retains more than 80% of its activity at 10% ethanol (v/v) for up to 48 h. When LysMP was added at 250 µg/mL to yeast corn mash fermentations containing L. fermentum, it reduced bacterial load by at least 4-log fold compared to the untreated controls and prevented stuck fermentation. In comparison, untreated controls with contamination increased from an initial bacterial load of 1.50 × 107 CFU/mL to 2.25 × 109 CFU/mL and 1.89 × 109 CFU/mL after 24 h and 48 h, respectively. Glucose in the treated samples was fully utilized, while untreated controls with contamination had more than 4% (w/v) remaining at 48 h. Furthermore, there was at least a fivefold reduction in lactic acid (0.085 M untreated contamination controls compared to 0.016 M treated), and a fourfold reduction in acetic acid (0.027 M untreated contamination controls vs. 0.007 M treated), when LysMP was used to treat contaminated corn mash fermentations. Most importantly, final ethanol yields increased from 6.3% (w/v) in untreated contamination samples to 9.3% (w/v) in treated contamination samples, an approximate 50% increase to levels comparable to uncontaminated controls 9.3% (w/v). CONCLUSION LysMP could be a good alternative to replace antibiotics for mitigation of LAB contamination in biofuel refineries.
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Affiliation(s)
- Maulik H Patel
- Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN, USA
| | - Shao-Yeh Lu
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Renewable Product Technology Research Unit, 1815 N. University St, Peoria, IL, 61604-3902, USA.
| | - Siqing Liu
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Renewable Product Technology Research Unit, 1815 N. University St, Peoria, IL, 61604-3902, USA
| | - Christopher D Skory
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Renewable Product Technology Research Unit, 1815 N. University St, Peoria, IL, 61604-3902, USA
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Yoosefian SH, Ebrahimi R, Hosseinzadeh Samani B, Maleki A. Digestion of lignocellulosic biomass under an innovative pneu-mechanical system and optimization of process. J Biotechnol 2023; 374:70-79. [PMID: 37541624 DOI: 10.1016/j.jbiotec.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 07/12/2023] [Accepted: 07/29/2023] [Indexed: 08/06/2023]
Abstract
In this study, an anaerobic pneumatic mechanical digester (PMD) was designed for the first time to investigate the impact of pneumatic agitator on increasing the bioethanol production and compared with a mechanical digester (MD). Fermentation was performed during an optimized pretreatment and hydrolysis process by RSM (Response Surface Method). Ultrasound optimized points (the time values, the acid concentration, and the biomass load) were 30 min, 1.95% v/v, and 6%, and hydrolysis was done within 45 min at the acid concentration of 2.04% v/v and temperature of 148.4 °C. The hydrolysis solutions were poured and the fermentation process took place within 20 days in the PMD and MD. The sampling sequence was every 5 days. According to the results, the PMD could produce bioethanol more than the MD by 27.94%. Besides, CO, H2S and O2 were measured through fermentation. In PMD, the amount of H2S and O2 was lower than the MD, but then the production of CO in the PMD was meaningfully higher. Finally, by the application of the PMD, the amount of harmful mixtures produced throughout the process can be controlled. It can be said that with the new method designed in this study, it is possible to take an important step in the biorefinery and use the biomass produced in nature in an economical and environmentally friendly way.
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Affiliation(s)
- Seyedeh Hoda Yoosefian
- Department of Mechanical Engineering of Biosystem, Shahrekord University, 8818634141 Shahrekord, Iran
| | - Rahim Ebrahimi
- Department of Mechanical Engineering of Biosystem, Shahrekord University, 8818634141 Shahrekord, Iran.
| | | | - Ali Maleki
- Department of Mechanical Engineering of Biosystem, Shahrekord University, 8818634141 Shahrekord, Iran
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Garg S, Behera S, Ruiz HA, Kumar S. A Review on Opportunities and Limitations of Membrane Bioreactor Configuration in Biofuel Production. Appl Biochem Biotechnol 2023; 195:5497-5540. [PMID: 35579743 DOI: 10.1007/s12010-022-03955-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 05/02/2022] [Indexed: 12/13/2022]
Abstract
Biofuels are a clean and renewable source of energy that has gained more attention in recent years; however, high energy input and processing cost during the production and recovery process restricted its progress. Membrane technology offers a range of energy-saving separation for product recovery and purification in biorefining along with biofuel production processes. Membrane separation techniques in combination with different biological processes increase cell concentration in the bioreactor, reduce product inhibition, decrease chemical consumption, reduce energy requirements, and further increase product concentration and productivity. Certain membrane bioreactors have evolved with the ability to deal with different biological production and separation processes to make them cost-effective, but there are certain limitations. The present review describes the advantages and limitations of membrane bioreactors to produce different biofuels with the ability to simplify upstream and downstream processes in terms of sustainability and economics.
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Affiliation(s)
- Shruti Garg
- Biochemical Conversion Division, Sardar Swaran Singh National Institute of Bio-Energy, Kapurthala, Punjab, 144601, India
- Department of Microbiology, Guru Nanak Dev University, Grand Trunk Road, Amritsar, Punjab, 143040, India
| | - Shuvashish Behera
- Biochemical Conversion Division, Sardar Swaran Singh National Institute of Bio-Energy, Kapurthala, Punjab, 144601, India.
- Department of Alcohol Technology and Biofuels, Vasantdada Sugar Institute, Manjari (Bk.), Pune, 412307, India.
| | - Hector A Ruiz
- Biorefinery Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, 25280, Saltillo, Coahuila, Mexico
| | - Sachin Kumar
- Biochemical Conversion Division, Sardar Swaran Singh National Institute of Bio-Energy, Kapurthala, Punjab, 144601, India.
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Wayllace NM, Martín M, Busi MV, Gomez-Casati DF. Microbial glucoamylases: structural and functional properties and biotechnological uses. World J Microbiol Biotechnol 2023; 39:293. [PMID: 37653355 DOI: 10.1007/s11274-023-03731-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 08/14/2023] [Indexed: 09/02/2023]
Abstract
Glucoamylases (GAs) are one of the principal groups of enzymes involved in starch hydrolysis and belong to the glycosylhydrolase family. They are classified as exo-amylases due to their ability to hydrolyze α-1,4 glycosidic bonds from the non-reducing end of starch, maltooligosaccharides, and related substrates, releasing β-D-glucose. Structurally, GAs possess a characteristic catalytic domain (CD) with an (α/α)6 fold and exhibit five conserved regions within this domain. The CD may or may not be linked to a non-catalytic domain with variable functions depending on its origin. GAs are versatile enzymes with diverse applications in food, biofuel, bioplastic and other chemical industries. Although fungal GAs are commonly employed for these purposes, they have limitations such as their low thermostability and an acidic pH requirement. Alternatively, GAs derived from prokaryotic organisms are a good option to save costs as they exhibit greater thermostability compared to fungal GAs. Moreover, a group of cold-adapted GAs from psychrophilic organisms demonstrates intriguing properties that make them suitable for application in various industries. This review provides a comprehensive overview of the structural and sequential properties as well as biotechnological applications of GAs in different industrial processes.
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Affiliation(s)
- Natael M Wayllace
- CEFOBI-CONICET. Centro de Estudios Fotosintéticos y Bioquímicos - Consejo Nacional de Investigaciones Científicas y Técnicas. Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario, Santa Fe, Argentina
| | - Mariana Martín
- CEFOBI-CONICET. Centro de Estudios Fotosintéticos y Bioquímicos - Consejo Nacional de Investigaciones Científicas y Técnicas. Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario, Santa Fe, Argentina
| | - María V Busi
- CEFOBI-CONICET. Centro de Estudios Fotosintéticos y Bioquímicos - Consejo Nacional de Investigaciones Científicas y Técnicas. Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario, Santa Fe, Argentina.
| | - Diego F Gomez-Casati
- CEFOBI-CONICET. Centro de Estudios Fotosintéticos y Bioquímicos - Consejo Nacional de Investigaciones Científicas y Técnicas. Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario, Santa Fe, Argentina.
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González-Contreras M, Hernández-Escoto H, Aguilar-Garnica E. A comprehensive analysis of bioethanol and ethyl lactate joint production in second-generation biorefinery: Simulation, techno-economic, and profitability assessments. Bioresource Technology 2023:129470. [PMID: 37429556 DOI: 10.1016/j.biortech.2023.129470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/12/2023]
Abstract
Second-generation biorefineries (2GBR) represent an innovative application of bioresources technologies to produce bioenergy and valuable products. This paper aims to introduce and analyze the joint production of bioethanol and ethyl lactate in a 2GBR. Techno-economic and profitability perspectives are considered in the analysis which is conducted via simulation considering corn stover as raw material. A key aspect in the analysis is a joint production parameter named α, whose values can dictate either the sole production of bioethanol (α = 0), joint production (0 < α < 1), or the unique production of ethyl lactate (α = 1). In other words, the proposed joint production scheme provides versatility in production. Simulations show that the lowest Total Capital Investment, Unit Production Cost, and Operating Cost values were associated with low values of α. Furthermore, when α ≥ 0.4, the 2GBR under study can achieve internal rates of return above 30%, which implies that the project offers a potentially high profitability.
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Affiliation(s)
- Moisés González-Contreras
- Departamento de Ciencias Biotecnológicas y Ambientales, Universidad Autónoma de Guadalajara, 1201 Av. Patria, 44100 Guadalajara, Mexico
| | - Héctor Hernández-Escoto
- Departamento de Ingeniería Química, Universidad de Guanajuato, Noria Alta S/N, Guanajuato, Guanajuato 36050, Mexico
| | - Efrén Aguilar-Garnica
- Departamento de Ciencias Biotecnológicas y Ambientales, Universidad Autónoma de Guadalajara, 1201 Av. Patria, 44100 Guadalajara, Mexico.
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35
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Cho EJ, Lee YG, Song Y, Kim HY, Nguyen DT, Bae HJ. Converting textile waste into value-added chemicals: An integrated bio-refinery process. Environ Sci Ecotechnol 2023; 15:100238. [PMID: 36785801 PMCID: PMC9918418 DOI: 10.1016/j.ese.2023.100238] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 06/18/2023]
Abstract
The rate of textile waste generation worldwide has increased dramatically due to a rise in clothing consumption and production. Here, conversion of cotton-based, colored cotton-based, and blended cotton-polyethylene terephthalate (PET) textile waste materials into value-added chemicals (bioethanol, sorbitol, lactic acid, terephthalic acid (TPA), and ethylene glycol (EG)) via enzymatic hydrolysis and fermentation was investigated. In order to enhance the efficiency of enzymatic saccharification, effective pretreatment methods for each type of textile waste were developed, respectively. A high glucose yield of 99.1% was obtained from white cotton-based textile waste after NaOH pretreatment. Furthermore, the digestibility of the cellulose in colored cotton-based textile wastes was increased 1.38-1.75 times because of the removal of dye materials by HPAC-NaOH pretreatment. The blended cotton-PET samples showed good hydrolysis efficiency following PET removal via NaOH-ethanol pretreatment, with a glucose yield of 92.49%. The sugar content produced via enzymatic hydrolysis was then converted into key platform chemicals (bioethanol, sorbitol, and lactic acid) via fermentation or hydrogenation. The maximum ethanol yield was achieved with the white T-shirt sample (537 mL/kg substrate), which was 3.2, 2.1, and 2.6 times higher than those obtained with rice straw, pine wood, and oak wood, respectively. Glucose was selectively converted into sorbitol and LA at a yield of 70% and 83.67%, respectively. TPA and EG were produced from blended cotton-PET via NaOH-ethanol pretreatment. The integrated biorefinery process proposed here demonstrates significant potential for valorization of textile waste.
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Affiliation(s)
- Eun Jin Cho
- Bio-Energy Research Center, Chonnam National University, Gwangju, 500-757, Republic of Korea
| | - Yoon Gyo Lee
- Bio-Energy Research Center, Chonnam National University, Gwangju, 500-757, Republic of Korea
| | - Younho Song
- Bio-Energy Research Center, Chonnam National University, Gwangju, 500-757, Republic of Korea
| | - Ha Yeon Kim
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, 500-757, Republic of Korea
| | | | - Hyeun-Jong Bae
- Bio-Energy Research Center, Chonnam National University, Gwangju, 500-757, Republic of Korea
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, 500-757, Republic of Korea
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Zhang Y, Sun T, Wu T, Li J, Hu D, Liu D, Li J, Tian C. Consolidated bioprocessing for bioethanol production by metabolically engineered cellulolytic fungus Myceliophthora thermophila. Metab Eng 2023; 78:192-199. [PMID: 37348810 DOI: 10.1016/j.ymben.2023.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/14/2023] [Accepted: 06/18/2023] [Indexed: 06/24/2023]
Abstract
Using cellulosic ethanol as fuel is one way to help achieve the world's decarbonization goals. However, the economics of the present technology are unfavorable, especially the cost of cellulose degradation. Here, we reprogram the thermophilic cellulosic fungus Myceliophthora thermophila to directly ferment cellulose into ethanol by mimicking the aerobic ethanol fermentation of yeast (the Crabtree effect), including optimizing the synthetic pathway, enhancing the glycolytic rate, inhibiting mitochondrial NADH shuttles, and knocking out ethanol consumption pathway. The final engineered strain produced 52.8 g/L ethanol directly from cellulose, and 39.8 g/L from corncob, without the need for any added cellulase, while the starting strain produced almost no ethanol. We also demonstrate that as the ethanol fermentation by engineered M. thermophila increases, the composition and expression of cellulases that facilitate the degradation of cellulose, especially cellobiohydrolases, changes. The simplified production process and significantly increased ethanol yield indicate that the fungal consolidated bioprocessing technology that we develop here (one-step, one-strain ethanol production) is promising for fueling sustainable carbon-neutral biomanufacturing in the future.
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Affiliation(s)
- Yongli Zhang
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Tao Sun
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Taju Wu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Jinyang Li
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Die Hu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Defei Liu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Jingen Li
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
| | - Chaoguang Tian
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China; National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, China.
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37
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Dong CD, Patel AK, Madhavan A, Chen CW, Singhania RR. Significance of glycans in cellulolytic enzymes for lignocellulosic biorefinery - A review. Bioresour Technol 2023; 379:128992. [PMID: 37011847 DOI: 10.1016/j.biortech.2023.128992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 05/03/2023]
Abstract
Lignocellulosic (LC) biomass is the most abundant renewable resource for mankind gravitating society towards sustainable solution for energy that can reduce the carbon footprint. The economic feasibility of 'biomass biorefinery' depends upon the efficiency cellulolytic enzymes which is the main crux. Its high production cost and low efficiencies are the major limitations, that need to be resolved. As the complexity of the genome increases, so does the complexity of the proteome, further facilitated by protein post-translational modifications (PTMs). Glycosylation is regarded the major PTMs and hardly any recent work is focused on importance of glycosylation in cellulase. By modifying protein side chains and glycans, superior cellulases with improved stability and efficiency can be obtained. Functional proteomics relies heavily on PTMs because they regulate activity, localization, and interactions with protein, lipid, nucleic acid, and cofactor molecules. O- and N- glycosylation in cellulases influences its characteristics adding positive attributes to the enzymes.
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Affiliation(s)
- Cheng-Di Dong
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Sustainable Environment Research Center, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Anil Kumar Patel
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, India
| | - Aravind Madhavan
- School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala 690 525, India
| | - Chiu-Wen Chen
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Sustainable Environment Research Center, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Reeta Rani Singhania
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Centre for Energy and Environmental Sustainability, Lucknow 226 029, India.
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Fan M, Liu Z, Xie J, Chen Y. An optimum biomass fractionation strategy into maximum carbohydrates conversion and lignin valorization from poplar. Bioresour Technol 2023; 385:129344. [PMID: 37369319 DOI: 10.1016/j.biortech.2023.129344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023]
Abstract
Appropriate fractionation of lignocellulosic biomass into useable forms is a key challenge to achieving an economic bioethanol production. In the present study, four different fractionation strategies of hydrothermal-, NaOH-, ethanol-, and NaOH catalyzed ethanol pretreatment were investigated to compare their abilities of cellulose conversion. Results showed that NaOH catalyzed ethanol pretreatment showed a rather high extent of delignification of 85.92%, which also enhanced the retention of cellulose (92.56%) and hemicellulose (76.57%); while other pretreatments tended to produce cellulose fraction which was insufficient to achieve the whole component utilization. After simultaneous saccharification and fermentation at high solids loading, synergistic maximization of xylose (42.47 g/L) and ethanol (85.74 g/L) output was achieved via alkaline ethanol pretreatment. Lignin characterization information showed that alkaline ethanol pretreatment facilitates the cleavage of β-O-4 linkage and further converts into arylglycerol. Moreover, less condensed substructure units with high processing activity were also generated in S- and G- lignin.
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Affiliation(s)
- Meishan Fan
- Institute of Biomass Engineering, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, PR China; Henry Fok School of Biology & Agriculture, Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, PR China
| | - Zhu Liu
- Henry Fok School of Biology & Agriculture, Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, PR China
| | - Jun Xie
- Institute of Biomass Engineering, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, PR China.
| | - Yong Chen
- Institute of Biomass Engineering, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (CAS), Guangzhou 510640, PR China
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Jayakumar M, Gindaba GT, Gebeyehu KB, Periyasamy S, Jabesa A, Baskar G, John BI, Pugazhendhi A. Bioethanol production from agricultural residues as lignocellulosic biomass feedstock's waste valorization approach: A comprehensive review. Sci Total Environ 2023; 879:163158. [PMID: 37001650 DOI: 10.1016/j.scitotenv.2023.163158] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 03/13/2023] [Accepted: 03/26/2023] [Indexed: 05/17/2023]
Abstract
Bioenergy is becoming very popular, drawing attention as a renewable energy source that may assist in managing growing energy costs, besides possibly affording revenue to underprivileged farmers and rural populations worldwide. Bioethanol made from agricultural residual-biomass provides irreplaceable environmental, socioeconomic, and strategic benefits and can be considered as a safe and cleaner liquid fuel alternative to traditional fossil fuels. There is a significant advancement made at the bench scale towards fuel ethanol production from agricultural lignocellulosic materials (ALCM). These process technologies include pretreatment of ALCM biomass employment of cellulolytic enzymes for depolymerizing carbohydrate polymers into fermentable sugars to effectively achieve it by applying healthy fermentative microbes for bioethanol generation. Amongst all the available process methods, weak acid hydrolysis followed by enzymatic hydrolysis process technique. Recovering higher proficient celluloses is more attractive in terms of economic benefits and long-term environmental effects. Besides, the state of ALCM biomass based bioethanol production methods is discussed in detail, which could make it easier for the scientific and industrial communities to utilize agricultural leftovers properly.
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Affiliation(s)
- Mani Jayakumar
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, Haramaya, Dire Dawa, Ethiopia.
| | - Gadissa Tokuma Gindaba
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, Haramaya, Dire Dawa, Ethiopia
| | | | - Selvakumar Periyasamy
- Department of Chemical Engineering, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, Adama 1888, Ethiopia
| | - Abdisa Jabesa
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, Haramaya, Dire Dawa, Ethiopia
| | - Gurunathan Baskar
- Department of Biotechnology, St. Joseph's College of Engineering, Chennai 600119, India
| | - Beula Isabel John
- Department of Energy and Environment, National Institute of Technology, Tiruchirappalli 620015, Tamil Nadu, India
| | - Arivalagan Pugazhendhi
- University Centre for Research & Development, Department of Civil Engineering, Chandigarh University, Mohali-140103, India; School of Engineering, Lebanese American University, Byblos, Lebanon.
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40
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Gord Noshahri N, Sharifi A, Seyedabadi M, Rudat J, Zare Mehrjerdi M. Development of two devices for high-throughput screening of ethanol-producing microorganisms by real-time CO 2 production monitoring. Bioprocess Biosyst Eng 2023:10.1007/s00449-023-02892-3. [PMID: 37338580 DOI: 10.1007/s00449-023-02892-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Bioethanol's importance as a renewable energy carrier led to the development of new devices for the high-throughput screening (HTS) of ethanol-producing microorganisms, monitoring ethanol production, and process optimization. This study developed two devices based on measuring CO2 evolution (an equimolar byproduct of microbial ethanol fermentation) to allow for a fast and robust HTS of ethanol-producing microorganisms for industrial purposes. First, a pH-based system for identifying ethanol producers (Ethanol-HTS) was established in a 96-well plate format where CO2 emission is captured by a 3D-printed silicone lid and transferred from the fermentation well to a reagent containing bromothymol blue as a pH indicator. Second, a self-made CO2 flow meter (CFM) was developed as a lab-scale tool for real-time quantification of ethanol production. This CFM contains four chambers to simultaneously apply different fermentation treatments while LCD and serial ports allow fast and easy data transfer. Applying ethanol-HTS with various yeast concentrations and yeast strains displayed different colors, from dark blue to dark and light green, based on the amount of carbonic acid formed. The results of the CFM device revealed a fermentation profile. The curve of CO2 production flow among six replications showed the same pattern in all batches. The comparison of final ethanol concentrations calculated based on CO2 flow by the CFM device with the GC analysis showed 3% difference which is not significant. Data validation of both devices demonstrated their applicability for screening novel bioethanol-producer strains, determining carbohydrate fermentation profiles, and monitoring ethanol production in real time.
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Affiliation(s)
- Najme Gord Noshahri
- Industrial Microbial Biotechnology Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR)-Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Ahmad Sharifi
- Horticultural Plants Biotechnology Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR)-Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Mohsen Seyedabadi
- Industrial Microbial Biotechnology Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR)-Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Jens Rudat
- BLT 2: Technical Biology, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
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Qi W, Feng Q, Wang W, Zhang Y, Hu Y, Shakeel U, Xiao L, Wang L, Chen H, Liang C. Combination of surfactants and enzyme cocktails for enhancing woody biomass saccharification and bioethanol production from lab-scale to pilot-scale. Bioresour Technol 2023:129343. [PMID: 37348567 DOI: 10.1016/j.biortech.2023.129343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/24/2023]
Abstract
Converting woody biomass to bioethanol might be more affordable, environmentally friendly, and efficient for making biofuel commercially feasible, but it would still need a significant optimization process and expand pilot-scale research. A combination of commercial low enzymes loading at 10 FPU/g glucan and compound additives utilizing Tween 80, PEG8000 and sophorolipid applied from lab-scale to pilot-scale have been studied in this work at economically viable dosages for enhancing bioethanol production. In lab-scale saccharification and fermentation, pretreated poplar at a high solid loading of 20% yielded the highest ethanol titers of 30.96 g/L and theoretical ethanol yield of 92.79%. Additionally, pilot-scale operation was used to investigate the bioethanol amplification, a final volume of 33 m3 which yielded the greatest ethanol amount of 599.6 kg from poplar wood while gaining on-site value-added production of hemicellulosic and cellobiose liquor 1122 kg and lignin residues 2292 kg.
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Affiliation(s)
- Wei Qi
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qifa Feng
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wen Wang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Zhang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunzi Hu
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
| | - Usama Shakeel
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
| | - Lin Xiao
- Longlive Bio-technology Co., Ltd., Yucheng City, Shandong Province 251200, China
| | - Lan Wang
- State Key Laboratory of Biochemical Engineering, Beijing Key Laboratory of Biomass Refining Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Hongzhang Chen
- State Key Laboratory of Biochemical Engineering, Beijing Key Laboratory of Biomass Refining Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Cuiyi Liang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China.
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Yi X, Yang D, Xu X, Wang Y, Guo Y, Zhang M, Wang Y, He Y, Zhu J. Cold plasma pretreatment reinforces the lignocellulose-derived aldehyde inhibitors tolerance and bioethanol fermentability for Zymomonas mobilis. Biotechnol Biofuels Bioprod 2023; 16:102. [PMID: 37322470 DOI: 10.1186/s13068-023-02354-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/29/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Lignocellulose-derived aldehyde inhibitors seriously blocked the biorefinery of biofuels and biochemicals. To date, the economic production of lignocellulose-based products heavily relied on high productivities of fermenting strains. However, it was expensive and time-consuming for the achievable rational modification to strengthen stress tolerance robustness of aldehyde inhibitors. Here, it aimed to improve aldehyde inhibitors tolerance and cellulosic bioethanol fermentability for the chassis Zymomonas mobilis ZM4 pretreated using energy-efficient and eco-friendly cold plasma. RESULTS It was found that bioethanol fermentability was weaker in CSH (corn stover hydrolysates) than that in synthetic medium for Z. mobilis, and thus was attributed to the inhibition of the lignocellulose-derived aldehyde inhibitors in CSH. Convincingly, it further confirmed that the mixed aldehydes severely decreased bioethanol accumulation through additional aldehydes supplementary assays in synthetic medium. After assayed under different processing time (10-30 s), discharge power (80-160 W), and working pressure (120-180 Pa) using cold atmosphere plasma (CAP), it achieved the increased bioethanol fermentability for Z. mobilis after pretreated at the optimized parameters (20 s, 140 W and 165 Pa). It showed that cold plasma brought about three mutation sites including ZMO0694 (E220V), ZMO0843 (L471L) and ZMO0843 (P505H) via Genome resequencing-based SNPs (single nucleotide polymorphisms). A serial of differentially expressed genes (DEGs) were further identified as the potential contributors for stress tolerance via RNA-Seq sequencing, including ZMO0253 and ZMO_RS09265 (type I secretion outer membrane protein), ZMO1941 (Type IV secretory pathway protease TraF-like protein), ZMOr003 and ZMOr006 (16S ribosomal RNA), ZMO0375 and ZMO0374 (levansucrase) and ZMO1705 (thioredoxins). It enriched cellular process, followed by metabolic process and single-organism process for biological process. For KEGG analysis, the mutant was also referred to starch and sucrose metabolism, galactose metabolism and two-component system. Finally, but interestingly, it simultaneously achieved the enhanced stress tolerance capacity of aldehyde inhibitors and bioethanol fermentability in CSH for the mutant Z. mobilis. CONCLUSIONS Of several candidate genetic changes, the mutant Z. mobilis treated with cold plasma was conferred upon the facilitated aldehyde inhibitors tolerance and bioethanol production. This work would provide a strain biocatalyst for the efficient production of lignocellulosic biofuels and biochemicals.
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Affiliation(s)
- Xia Yi
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou, 213164, China.
- Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China.
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou University, Changzhou, 213164, Jiangsu, China.
| | - Dong Yang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Xiaoyan Xu
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Youjun Wang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Yan Guo
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Meng Zhang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Yilong Wang
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China
| | - Yucai He
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou, 213164, China.
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China.
| | - Jie Zhu
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Changzhou University, Changzhou, 213164, China.
- Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China.
- Changzhou Key Laboratory of Biomass Green, Safe & High Value Utilization Technology, Changzhou University, Changzhou, 213164, Jiangsu, China.
- School of Pharmacy, Changzhou University, Changzhou, 213164, Jiangsu, China.
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Kwon O, Son M, Kim J, Han JH. Organic waste derived bioethanol supply chain network: Multiobjective snapshot model with a real-Korea case study. J Environ Manage 2023; 342:118279. [PMID: 37290310 DOI: 10.1016/j.jenvman.2023.118279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/23/2023] [Accepted: 05/25/2023] [Indexed: 06/10/2023]
Abstract
Bioethanol, a promising biofuel gasoline additive, was recently produced by a new technology using acetic acid derived from organic waste. This study develops a multiobjective mathematical model with two competing minimization objectives: economy and environmental impact. The formulation is based on a mixed integer linear programming approach. The configuration of the organic-waste (OW)-based bioethanol supply chain network is optimized in terms of the number and locations of bioethanol refineries. The flows of acetic acid and bioethanol between the geographical nodes must meet the bioethanol regional demand. The model is validated in three real-scenario case studies with different OW utilization rates (30%, 50%, and 70%) in South Korea in the near future (2030). The multiobjective problem is solved using the ε-constraint method and the selected Pareto solutions balance the trade-off between the economic and environmental objectives. At the "best-choice" solution points, increasing the OW utilization rate from 30% to 70% decreased the total annual cost from 904.2 to 707.3 million $/yr and the total greenhouse emissions from 1087.2 to -15.7 CO2 equiv./yr.
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Affiliation(s)
- Oseok Kwon
- Carbon Neutralization TFT.Platform Technology, LG Chem, 07796, Republic of Korea
| | - Myungsuk Son
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Juyeon Kim
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Jee-Hoon Han
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea.
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da Silva RR, Zaiter MA, Boscolo M, da Silva R, Gomes E. Xylose consumption and ethanol production by Pichia guilliermondii and Candida oleophila in the presence of furans, phenolic compounds, and organic acids commonly produced during the pre-treatment of plant biomass. Braz J Microbiol 2023; 54:753-759. [PMID: 36826705 PMCID: PMC10234969 DOI: 10.1007/s42770-023-00937-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 02/15/2023] [Indexed: 02/25/2023] Open
Abstract
For 2G ethanol production, pentose fermentation and yeast tolerance to lignocellulosic hydrolyzate components are essential to improve biorefinery yields. Generally, physicochemical pre-treatment methodologies are used to facilitate access to cellulose and hemicellulose in plant material, which consequently can generate microbial growth inhibitory compounds, such as furans, weak acids, and phenolic compounds. Because of the unsatisfactory yield of wild-type Saccharomyces cerevisiae during pentose fermentation, the search for xylose-fermenting yeasts tolerant to microbial growth inhibitors has gained attention. In this study, we investigated the ability of the yeasts Pichia guilliermondii G1.2 and Candida oleophila G10.1 to produce ethanol from xylose and tolerate the inhibitors furfural, 5-hydroxymethylfurfural (HMF), acetic acid, formic acid, ferulic acid, and vanillin. We demonstrated that both yeasts were able to grow and consume xylose in the presence of all single inhibitors, with greater growth limitation in media containing furfural, acetic acid, and vanillin. In saline medium containing a mixture of these inhibitors (2.5-3.5 mM furfural and HMF, 1 mM ferulic acid, 1-1.5 mM vanillin, 10-13 mM acetic acid, and 5-7 mM formic acid), both yeasts were able to produce ethanol from xylose, similar to that detected in the control medium (without inhibitors). In future studies, the proteins involved in the transport of pentose and tolerance to these inhibitors need to be investigated.
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Affiliation(s)
- Ronivaldo Rodrigues da Silva
- Instituto de Biociencias, Letras e Ciencias Exatas, Universidade Estadual Paulista "Julio de Mesquita Filho", Cristovao Colombo, 2265, Jd Nazareth, Ibilce‑Unesp, Sao Jose do Rio Preto, São Paulo, Brazil.
| | - Mohammed Anas Zaiter
- Instituto de Biociencias, Letras e Ciencias Exatas, Universidade Estadual Paulista "Julio de Mesquita Filho", Cristovao Colombo, 2265, Jd Nazareth, Ibilce‑Unesp, Sao Jose do Rio Preto, São Paulo, Brazil
| | - Maurício Boscolo
- Instituto de Biociencias, Letras e Ciencias Exatas, Universidade Estadual Paulista "Julio de Mesquita Filho", Cristovao Colombo, 2265, Jd Nazareth, Ibilce‑Unesp, Sao Jose do Rio Preto, São Paulo, Brazil
| | - Roberto da Silva
- Instituto de Biociencias, Letras e Ciencias Exatas, Universidade Estadual Paulista "Julio de Mesquita Filho", Cristovao Colombo, 2265, Jd Nazareth, Ibilce‑Unesp, Sao Jose do Rio Preto, São Paulo, Brazil
| | - Eleni Gomes
- Instituto de Biociencias, Letras e Ciencias Exatas, Universidade Estadual Paulista "Julio de Mesquita Filho", Cristovao Colombo, 2265, Jd Nazareth, Ibilce‑Unesp, Sao Jose do Rio Preto, São Paulo, Brazil
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Malik K, Sharma A, Harikarthik D, Rani V, Arya N, Malik A, Rani S, Sangwan P, Bhatia T. Deciphering the biochemical and functional characterization of rice straw cultivars for industrial applications. Heliyon 2023; 9:e16339. [PMID: 37265610 PMCID: PMC10230206 DOI: 10.1016/j.heliyon.2023.e16339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 04/29/2023] [Accepted: 05/12/2023] [Indexed: 06/03/2023] Open
Abstract
As an agricultural state, Haryana (India) produces about six million metric tons (mt) of rice straw every year from rice cultivation. Currently, rice straw is either burned or ploughed into the field without being turned into a functional product. Burning of paddy straw release green house gases and particulate matter (2.5 and 10 μm), which leads to air pollution and considerable loss of soil property viz. nutrients, organic matter, productivity and biodiversity, and on and off-farm humans and animals' health. The biochemically and functionally specified potential for optimal alternative use of the rice straw of 13 most widely produced rice varieties from Haryana's eastern and western agro-climate zones was undertaken. Pusa-1401 variety had the highest cellulose (46.55%) and silica content (13.70%), while Pusa-1718 had hemicellulose (28.25%) and lignin (11.60%), respectively. Maximum nitrogen (0.81%), phosphorus (0.32%) and potassium (2.78%) were found in rice variety Pusa-1509, Pusa-1401 and Rice-6129. The findings seemed to be statistically significant (p < 0.05). The biochemical profiles of rice straw cultivars were classified into distinct structural groups (C-H alkalanes, O-H alcohol, C[bond, double bond]O, C-H alkanes) based on the FTIR spectrum in order to find the best alternative possibilities for bioethanol and compost production. According to the study, these rice straw varieties could be used to make lucrative industrial products.
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Affiliation(s)
- Kamla Malik
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Ajay Sharma
- Department of Mathematics and Statistics, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Dandu Harikarthik
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Vijaya Rani
- Department of Farm Machinery and Power Engineering, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Nisha Arya
- Department of Textile and Apparel Designing, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Anurag Malik
- Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Sunita Rani
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Punesh Sangwan
- Department of Biochemistry, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
| | - Tanvi Bhatia
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana, India
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Meng F, Fan J, Cui F, Yang H, Shi Z, Wang D, Yang J. An innovative and efficient hydrogen peroxide-citric acid pretreatment of bamboo residues to enhance enzymatic hydrolysis and ethanol production. Bioresour Technol 2023; 383:129230. [PMID: 37244315 DOI: 10.1016/j.biortech.2023.129230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/19/2023] [Accepted: 05/21/2023] [Indexed: 05/29/2023]
Abstract
Organic peracids has attracted widespread attention from researchers in biomass pretreatment. As a weak acid with high production, low price and toxicity, citric acid (CA) was mixed with hydrogen peroxide at the room temperature to generate peroxy-citric acid with strong oxidative functions. An innovative and efficient pretreatment method using peroxy-citric acid (HPCA) was proposed to enhance enzymatic hydrolysis and bioethanol production of bamboo residues. After D. giganteus (DG) was pretreated with HPCA at 80 °C for 3 h, lignin of 95.36% and xylan of 55.41% was effectively removed, and the enzymatic saccharification yield of HPCA-treated DG enhanced by about 8-9 times compared with CA pretreated DG. The ethanol recovery of 17.18 g/L was achieved. This work provided a reference for the mild biomass pretreatment, which will promote the large-scale application of organic peracids system in biorefinery processes.
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Affiliation(s)
- Fanyang Meng
- School of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Jing Fan
- School of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Fei Cui
- School of Civil Engineering, Southwest Forestry University, Kunming 650224, China
| | - Haiyan Yang
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China; School of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Zhengjun Shi
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China; School of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Dawei Wang
- School of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China
| | - Jing Yang
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China; School of Materials and Chemical Engineering, Southwest Forestry University, Kunming 650224, China.
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Khattab SMR, Okano H, Kimura C, Fujita T, Watanabe T. Efficient integrated production of bioethanol and antiviral glycerolysis lignin from sugarcane trash. Biotechnol Biofuels Bioprod 2023; 16:82. [PMID: 37189175 DOI: 10.1186/s13068-023-02333-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 04/28/2023] [Indexed: 05/17/2023]
Abstract
BACKGROUND Sugarcane trash (SCT) represents up to 18% of the aboveground biomass of sugarcane, surpassing 28 million tons globally per year. The majority of SCT is burning in the fields. Hence, efficient use of SCT is necessary to reduce carbon dioxide emissions and global warming and establish agro-industrial biorefineries. Apart from its low costs, conversion of whole biomass with high production efficiency and titer yield is mandatory for effective biorefinery systems. Therefore, in this study, we developed a simple, integrated method involving a single step of glycerolysis pretreatment to produce antiviral glycerolysis lignin (AGL). Subsequently, we co-fermented glycerol with hydrolyzed glucose and xylose to yield high titers of bioethanol. RESULTS SCT was subjected to pretreatment with microwave acidic glycerolysis with 50% aqueous (aq.) glycerol (MAG50); this pretreatment was optimized across different temperature ranges, acid concentrations, and reaction times. The optimized MAG50 (opMAG50) of SCT at 1:15 (w/v) in 1% H2SO4, 360 µM AlK(SO4)2 at 140 °C for 30 min (opMAG50) recovered the highest amount of total sugars and the lowest amount of furfural byproducts. Following opMAG50, the soluble fraction, i.e., glycerol xylose-rich solution (GXRS), was separated by filtration. A residual pulp was then washed with acetone, recovering 7.9% of the dry weight (27% of lignin) as an AGL. AGL strongly inhibited the replication of encephalomyocarditis virus (EMCV) in L929 cells without cytotoxicity. The pulp was then saccharified in yeast peptone medium by cellulase to produce a glucose concentration similar to the theoretical yield. The total xylose and arabinose recoveries were 69% and 93%, respectively. GXRS and saccharified sugars were combined and co-fermented through mixed cultures of two metabolically engineered Saccharomyces cerevisiae strains: glycerol-fermenting yeast (SK-FGG4) and xylose-fermenting yeast (SK-N2). By co-fermenting glycerol and xylose with glucose, the ethanol titer yield increased to 78.7 g/L (10% v/v ethanol), with a 96% conversion efficiency. CONCLUSION The integration of AGL production with the co-fermentation of glycerol, hydrolyzed glucose, and xylose to produce a high titer of bioethanol paves an avenue for the use of surplus glycerol from the biodiesel industry for the efficient utilization of SCT and other lignocellulosic biomasses.
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Affiliation(s)
- Sadat Mohamed Rezk Khattab
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
- Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt.
| | - Hiroyuki Okano
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Chihiro Kimura
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Takashi Fujita
- Institute for Frontier Life and Medical Sciences, Kyoto University, Shogoin, Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Takashi Watanabe
- Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
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Rathod BG, Pandala S, Poosarla VG. A Novel Halo-Acid-Alkali-Tolerant and Surfactant Stable Amylase Secreted from Halophile Bacillus siamensis F2 and Its Application in Waste Valorization by Bioethanol Production and Food Industry. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04559-x. [PMID: 37171761 DOI: 10.1007/s12010-023-04559-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2023] [Indexed: 05/13/2023]
Abstract
The extracellular amylase production level by the moderate halophile Bacillus siamensis F2 was optimized, and the enzyme was biochemically characterized. The culture parameters for NaCl, carbon, nitrogen, pH, and temperature were optimized for high titers of amylase production. Growing B. siamensis F2 cultures in Great Salt Lake-2 medium with additions of (in g/L) NaCl (100), starch (30), yeast extract (2), KNO3 (2), and MgSO4 (1) at pH 8, 30 °C resulted in the maximum amylase production (4.2 U/ml). The amylase was active across a wide range of salinities (0 to 30% NaCl), pH (5.0-10.0), and temperatures (20-70 °C) and showed good stability with surfactants (sodium dodecyl sulfate (SDS) and Triton X-100); hence, it was identified as halo-acid-alkali-tolerant and surfactant stable. Temperature, pH, and salinity were optimal for amylase activity at 50 °C, pH 7, and 5% NaCl, respectively. It also generates amylase by utilizing agricultural wastes like sugarcane bagasse, sweet potato peel, and rice husk. Based on the performance of B. siamensis F2 using agricultural wastes and synthesizing amylase, the current study attempted to produce bioethanol by coculturing with baker's yeast using sugarcane bagasse and sweet potato peel as a substrate, which yielded 47 and 57 g/L of bioethanol, respectively. Besides bioethanol production, amylase secreted by F2 was also employed for juice clarification for better yield and clarity and for softening dough to produce better-quality buns. This novel amylase may have many potential applications in waste valorization, biorefinery sectors, and food industries.
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Affiliation(s)
- Baliram Gurunath Rathod
- Department of Microbiology and FST (Food Science & Technology), GITAM School of Science, GITAM (Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India
| | - Srinija Pandala
- Department of Microbiology and FST (Food Science & Technology), GITAM School of Science, GITAM (Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India
| | - Venkata Giridhar Poosarla
- Department of Microbiology and FST (Food Science & Technology), GITAM School of Science, GITAM (Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India.
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Xu C, Xia T, Peng H, Liu P, Wang Y, Wang Y, Kang H, Tang J, Nauman Aftab M, Peng L. BsEXLX of engineered Trichoderma reesei strain as dual-active expansin to boost cellulases secretion for synergistic enhancement of biomass enzymatic saccharification in corn and Miscanthus straws. Bioresour Technol 2023; 376:128844. [PMID: 36906237 DOI: 10.1016/j.biortech.2023.128844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/03/2023] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
In this study, bacterial BsEXLE1 gene was overexpressed into T. reesei (Rut-C30) to generate a desirable engineered TrEXLX10 strain. While incubated with alkali-pretreated Miscanthus straw as carbon source, the TrEXLX10 secreted the β-glucosidases, cellobiohydrolases and xylanses with activities raised by 34%, 82% and 159% compared to the Rut-C30. Supplying EXLX10-secreted crude enzymes and commercial mixed-cellulases for two-step lignocellulose hydrolyses of corn and Miscanthus straws after mild alkali pretreatments, this work measured consistently higher hexoses yields released by the EXLX10-secreted enzymes for synergistic enhancements of biomass saccharification in all parallel experiments examined. Meanwhile, this study detected that the expansin, purified from EXLX10-secreted solution, was of exceptionally high binding activities with wall polymers, and further determined its independent enhancement for cellulose hydrolysis. Therefore, this study raised a mechanism model to highlight EXLX/expansin dual-activation roles for both secretion of stable biomass-degradation enzymes at high activity and biomass enzymatic saccharification in bioenergy crops.
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Affiliation(s)
- Chengbao Xu
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China; Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China
| | - Tao Xia
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Peng
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China; Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Peng Liu
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China; Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yihong Wang
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yanting Wang
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China; Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Heng Kang
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China; Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingfeng Tang
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China
| | | | - Liangcai Peng
- Key Laboratory of Fermentation Engineering (Ministry of Education), National "111" Center for Cellular Regulation & Molecular Pharmaceutics, Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), Hubei Key Laboratory of Industrial Microbiology, College of Biotechnology & Food Science, Hubei University of Technology, Wuhan 430068, China; Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Sawhney D, Vaid S, Bangotra R, Sharma S, Dutt HC, Kapoor N, Mahajan R, Bajaj BK. Proficient bioconversion of rice straw biomass to bioethanol using a novel combinatorial pretreatment approach based on deep eutectic solvent, microwave irradiation and laccase. Bioresour Technol 2023; 375:128791. [PMID: 36871702 DOI: 10.1016/j.biortech.2023.128791] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 02/18/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Current study is the first report of the combined application of chemical (deep eutectic solvent), physical (microwave irradiation) and biological (laccase) pretreatment strategies for enhancing the enzymatic digestibility of rice straw biomass. Pretreated rice straw biomass was saccharified by cellulase/xylanase from Aspergillus japonicus DSB2 to get a sugar yield of 252.36 mg/g biomass. Design of Experiment based optimization of pretreatment and saccharification variables increased the total sugar yield by 1.67 times (421.5 mg/g biomass, saccharification efficiency 72.6%). Sugary hydrolysate was ethanol-fermented by Saccharomyces cerevisiae and Pichia stipitis to achieve an ethanol yield of 214 mg/g biomass (bioconversion efficiency 72.5%). Structural/chemical aberrations induced in the biomass due to pretreatment were elucidated by X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, and 1H nuclear magnetic resonance techniques to unravel the pretreatment mechanisms. Combined application of various physico-chemical/biological pretreatment may be a promising approach for proficient bioconversion of rice straw biomass.
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Affiliation(s)
- Diksha Sawhney
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Surbhi Vaid
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Ridhika Bangotra
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Surbhi Sharma
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | | | - Nisha Kapoor
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Ritu Mahajan
- School of Biotechnology, University of Jammu, Jammu 180006, India
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