101
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Yoosefian SH, Ebrahimi R, Hosseinzadeh Samani B, Maleki A. Modification of bioethanol production in an innovative pneumatic digester with non-thermal cold plasma detoxification. Bioresour Technol 2022; 350:126907. [PMID: 35227915 DOI: 10.1016/j.biortech.2022.126907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/03/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
An anaerobic pneu-mechanical digester (PD) was designed to ferment lignocellulosic compounds. So, wheat and rice straws were pretreated using an ultrasound-acid, and then thermal-acid hydrolysis was conducted. Hydrolysis optimization was performed using the response surface method and the optimal points for time, temperature, and acid concentration were 45 min, 148.4 °C, and 2.04 % v/v, respectively. Cold plasma was then used as detoxification to reduce the amount of inhibitory compounds and acids. This method was capable of reducing the amounts of acetic acid, formic acid and furfural by 73, 83 and 68 % in hydrolyzed biomass, respectively. The biomass was fermented in a PD for 20 days and compared with a conventional digester (CD). The obtained results showed that the PD could increase the efficiency of bioethanol by 37 % in the detoxified state and 22 % in the non-detoxified state after 20 days of fermentation compared to the CD. Moreover, H2S, CO and O2 were measured during fermentation process. In PD, the amount of H2S and O2 was lower than CD, but CO was significantly higher in the PD.
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Affiliation(s)
- Seyedeh Hoda Yoosefian
- Department of Mechanical Engineering of Biosystems, Shahrekord University, 8818634141 Shahrekord, Iran
| | - Rahim Ebrahimi
- Department of Mechanical Engineering of Biosystems, Shahrekord University, 8818634141 Shahrekord, Iran.
| | | | - Ali Maleki
- Department of Mechanical Engineering of Biosystems, Shahrekord University, 8818634141 Shahrekord, Iran
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102
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Simpson JV, Wiatr CL. Quantification and Degradation of 2,2-Dibromo-3-Nitrilopropionamide (DBNPA) in Bioethanol Fermentation Coproducts. World J Microbiol Biotechnol 2022; 38:82. [PMID: 35348889 PMCID: PMC8964648 DOI: 10.1007/s11274-022-03253-0] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 02/18/2022] [Indexed: 11/26/2022]
Abstract
2,2-Dibromo-3-nitrilopropionamide (DBNPA) has been used as a biocide in industrial water applications due to its instantaneous antimicrobial activity and rapid chemical breakdown. In this study, DBNPA is considered a potential alternative for antibiotics used for bacterial control during corn-to-ethanol fermentation. A method using LC/MS/MS was developed to accurately quantify DBNPA in water. When this method was applied to quantify DBNPA concentration in a fermentation matrix, DBNPA was found to be unstable and to decay rapidly, preventing validation of the method or quantitation. This method was then used to evaluate the degradation rate of DBNPA in whole stillage, which is the nonvolatile residue produced by removal of ethanol from corn-based fermentation beer by distillation through the relative decrease in measured signal. In addition, a method was developed and validated to quantify bromide, one of the degradation products of DBNPA, in whole stillage using LC/MS/MS. The degradation rate of DBNPA in whole stillage was found to display first-order kinetics with a calculated half-life of 85 min. Laboratory analytical chemistry results on DBNPA degradation were confirmed based on a bacterial viability assay in field trials.
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Affiliation(s)
- J V Simpson
- National Corn-to-Ethanol Research Center (NCERC), Southern Illinois University-Edwardsville, Edwardsville, IL, United States
- Chemir Analytical Lab, Pfizer, St. Louis, MO, United States
| | - C L Wiatr
- Buckman Laboratories, Memphis, TN, United States.
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103
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Tong KTX, Tan IS, Foo HCY, Lam MK, Lim S, Lee KT. Advancement of biorefinery-derived platform chemicals from macroalgae: a perspective for bioethanol and lactic acid. Biomass Convers Biorefin 2022; 14:1-37. [PMID: 35316983 PMCID: PMC8929714 DOI: 10.1007/s13399-022-02561-7] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/24/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
The extensive growth of energy and plastic demand has raised concerns over the depletion of fossil fuels. Moreover, the environmental conundrums worldwide integrated with global warming and improper plastic waste management have led to the development of sustainable and environmentally friendly biofuel (bioethanol) and biopolymer (lactic acid, LA) derived from biomass for fossil fuels replacement and biodegradable plastic production, respectively. However, the high production cost of bioethanol and LA had limited its industrial-scale production. This paper has comprehensively reviewed the potential and development of third-generation feedstock for bioethanol and LA production, including significant technological barriers to be overcome for potential commercialization purposes. Then, an insight into the state-of-the-art hydrolysis and fermentation technologies using macroalgae as feedstock is also deliberated in detail. Lastly, the sustainability aspect and perspective of macroalgae biomass are evaluated economically and environmentally using a developed cascading system associated with techno-economic analysis and life cycle assessment, which represent the highlights of this review paper. Furthermore, this review provides a conceivable picture of macroalgae-based bioethanol and lactic acid biorefinery and future research directions that can be served as an important guideline for scientists, policymakers, and industrial players. Graphical abstract
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Affiliation(s)
- Kevin Tian Xiang Tong
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009 Miri, Sarawak, Malaysia
| | - Inn Shi Tan
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009 Miri, Sarawak, Malaysia
| | - Henry Chee Yew Foo
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009 Miri, Sarawak, Malaysia
| | - Man Kee Lam
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
- HICoE-Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
| | - Steven Lim
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, 43000 Kajang, Selangor, Malaysia
- Centre of Photonics and Advanced Materials Research, Universiti Tunku Abdul Rahman, 43000 Kajang, Selangor, Malaysia
| | - Keat Teong Lee
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
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104
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Zerafati ME, Bozorgi-Amiri A, Golmohammadi AM, Jolai F. A multi-objective mixed integer linear programming model proposed to optimize a supply chain network for microalgae-based biofuels and co-products: a case study in Iran. Environ Sci Pollut Res Int 2022:10.1007/s11356-022-19465-8. [PMID: 35301627 DOI: 10.1007/s11356-022-19465-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Recently, with efficient methods of cultivating microalgae at hand, researchers and investors have paid considerable attention to the production of different environmentally friendly biofuel products. In this study, a two-stage deterministic model is proposed to design a microalgae-based biofuel and co-product supply chain network (MBCSCN). In the first stage, appropriate locations to cultivate microalgae are identified through the analytical hierarchy process (AHP). In the second stage, a deterministic mathematical mixed integer linear programming (MILP) model is developed for a period of 5 years based on economic and environmental impacts as two criteria. The economic objective function maximizes the overall profit, while the objective function of the environmental impacts seeks to minimize fossil fuel consumption throughout the supply chain. Then, a multi-objective MILP optimization problem is solved using the ε-constraint method. The proposed model is evaluated through a case study in Iran. It has helped to identify appropriate locations for the cultivation of microalgae and to specify the required quantity of feedstock, the species of microalgae, the required technology, and the transportation modes in each step of the supply chain.
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Affiliation(s)
| | - Ali Bozorgi-Amiri
- School of Industrial Engineering, College of Engineering, University of Tehran, North Kargar, Tehran, Iran
| | | | - Fariborz Jolai
- School of Industrial Engineering, College of Engineering, University of Tehran, North Kargar, Tehran, Iran
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105
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Varano A, Shirahigue LD, Azevedo FA, Altenhofen da Silva M, Ceccato-Antonini SR. Mandarin essential oil as an antimicrobial in ethanolic fermentation: Effects on Limosilactobacillus fermentum and Saccharomyces cerevisiae. Lett Appl Microbiol 2022; 74:981-991. [PMID: 35247276 DOI: 10.1111/lam.13690] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 10/13/2021] [Revised: 02/24/2022] [Accepted: 02/25/2022] [Indexed: 11/30/2022]
Abstract
The antibacterial activity of citrus essential oils (EOs) in the context of combating Limosilactobacillus fermentum, one of the most important bacterial contaminants in the bioethanol production industry, has never been explored previously. Industrial processes usually utilize sulfuric acid for cell treatment to decrease bacterial contamination. However, due to the hazardous nature of sulfuric acid, an alternative to it is highly desirable. Therefore, in the present study, the efficacy of Fremont IAC 543 mandarin EO against a strain of L. fermentum (ATCC® 9338™) was evaluated under proliferative/non-proliferative conditions, in both pure culture and co-culture with an industrial strain of Saccharomyces cerevisiae. The mandarin EO exhibited higher effectiveness against L. fermentum compared to that against S. cerevisiae under non-proliferative conditions (added to water rather than to culture medium). At the concentration of 0.05%, the EO was as effective as the acid solution with pH 2.0 in reducing the count of L. fermentum almost 5 log CFU mL-1 cycles, while the concentration of 0.1% led to the complete loss of bacterial culturability. When L. fermentum was co-cultured with S. cerevisiae, the efficacy of the EO against the bacterial strain was reduced. However, despite this reduced efficacy in co-culture, mandarin EO may be considered effective in combating L. fermentum and could be applied in processes where this bacterium proves to be unfavorable and does not interact with S. cerevisiae.
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Affiliation(s)
- A Varano
- Dept. Tecnologia Agroindustrial e Socioeconomia Rural, Centro de Ciências Agrárias, Universidade Federal de São Carlos, Campus de Araras, Via Anhanguera km 174, 13600-970, Araras, SP, Brasil
| | - L D Shirahigue
- Dept. Tecnologia Agroindustrial e Socioeconomia Rural, Centro de Ciências Agrárias, Universidade Federal de São Carlos, Campus de Araras, Via Anhanguera km 174, 13600-970, Araras, SP, Brasil
| | - F A Azevedo
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico (IAC), Via Anhanguera km 158, 13490-970, Cordeirópolis, SP, Brasil
| | - M Altenhofen da Silva
- Dept. Tecnologia Agroindustrial e Socioeconomia Rural, Centro de Ciências Agrárias, Universidade Federal de São Carlos, Campus de Araras, Via Anhanguera km 174, 13600-970, Araras, SP, Brasil
| | - S R Ceccato-Antonini
- Dept. Tecnologia Agroindustrial e Socioeconomia Rural, Centro de Ciências Agrárias, Universidade Federal de São Carlos, Campus de Araras, Via Anhanguera km 174, 13600-970, Araras, SP, Brasil
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106
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Hajaya MG, Shaqarin T. Multivariable advanced nonlinear controller for bioethanol production in a non-isothermal fermentation bioreactor. Bioresour Technol 2022; 348:126810. [PMID: 35131455 DOI: 10.1016/j.biortech.2022.126810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 12/17/2021] [Revised: 01/21/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Design for fermentation bioreactor controllers is challenged by the nonlinear process kinetics and the lack of online measurements for key variables. This work developed a multi-input, multi-output advanced nonlinear control structure for a continuous, non-isothermal, constant volume fermentation bioreactor. Utilizing feedback linearization control for the bioreactor feed to regulate glucose concentration, and backstepping control for the cooling jacket feed to regulate reactor temperature. A developed novel estimator for biomass concentration was incorporated to provide online estimates for the unmeasurable state variable. Simulation results showed the control structure ability in efficiently establishing a combination of dynamic and fixed set points, despite disturbances in the bioreactor feed temperature and glucose concentration. Expanded bioreactor control authority increased operational flexibility and enhanced the potential for performance improvements. This work illustrated the effectiveness of feedback linearization and backstepping control in designing controllers for biological systems with nonlinear dynamics, complex interactions, and input disturbances.
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Affiliation(s)
- Malek G Hajaya
- Department of Civil Engineering, Tafila Technical University, Tafila, Jordan.
| | - Tamir Shaqarin
- Department of Mechanical Engineering, Tafila Technical University, Tafila, Jordan
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107
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Priyadharsini P, Dawn SS, Arun J. Four stroke diesel engine performance and emission studies of ethanol recovered from Kappaphycus alvarezii reject -solid food waste mixed substrates and its blends. Chemosphere 2022; 291:132689. [PMID: 34710462 DOI: 10.1016/j.chemosphere.2021.132689] [Citation(s) in RCA: 2] [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: 06/21/2021] [Revised: 09/25/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Bioethanol is an eco-friendly green fuel, owing to its production from sustainable bio-based sources. In this study, bioethanol (BE) is produced from Kappaphycus alverezii reject (KR) blended with Solid Food Waste (SFW). This bioethanol is blended with petroleum-based diesel (PBD) in the following proportions: 15%, 20% and 25% for further studies. Performance characteristics, specifically Brake Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE), Brake Power (BP) and exhaust emissions, mainly Carbon monoxide (CO), Carbon dioxide (CO2), Smoke Opacity (SO), hydrocarbons (HC) and oxides of Nitrogen (NOX) have been investigated. The blended test fuels show better results, which is confirmed by the performance characteristics of BTE being lower than PBD. The emission report shows lesser CO (0.12%) and SO (59.6%) compared to PBD (0.14% and 67.2%), signifying the clean-burning tendency of BE blends. From the findings, PBD75: BE25 is an excellent fuel blend for improving flow properties, engine performance, and emission characteristics.
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Affiliation(s)
- P Priyadharsini
- Centre of Excellence for Energy Research, Sathyabama Institute of Science and Technology, Chennai, 600 119, India; Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai, 600 119, India
| | - S S Dawn
- Centre of Excellence for Energy Research, Sathyabama Institute of Science and Technology, Chennai, 600 119, India; Centre for Waste Management, Sathyabama Institute of Science and Technology, Chennai, 600 119, India.
| | - J Arun
- Centre for Waste Management, Sathyabama Institute of Science and Technology, Chennai, 600 119, India
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108
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Soltaninejad A, Jazini M, Karimi K. Sustainable bioconversion of potato peel wastes into ethanol and biogas using organosolv pretreatment. Chemosphere 2022; 291:133003. [PMID: 34808197 DOI: 10.1016/j.chemosphere.2021.133003] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 09/13/2021] [Revised: 11/01/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Potato processing industries generate considerable amounts of residues, i.e., potato peel wastes (PPW). Valorization of PPW for bioethanol and biogas production via a biorefining process was investigated in this study. Organosolv pretreatment was performed on the PPW using 50-75% (v/v) ethanol solution at 120-180 °C with/without the presence of 1% (w/w) H2SO4 (as a catalyst). After the pretreatment, the solvent, i.e., ethanol, was recovered by distillation. Catalyzed organosolv pretreatment using 50% (v/v) ethanol at 120 °C followed by enzymatic hydrolysis resulted in a high hydrolysate yield of 539.8 g glucose/kg dry PPW that was successfully fermented to 224.2 g ethanol/kg dry PPW. To recover more energy, the liquid fraction of the pretreatment remained after solvent recovery and the unhydrolyzed solids that remained from the enzymatic hydrolysis were anaerobically digested. From each kg of dry PPW, the anaerobic digestion produced 57.9 L biomethane. Thus, the biorefinery comprising ethanolic organosolv pretreatment, solvent recovery, enzymatic hydrolysis, ethanolic fermentation, and anaerobic digestion of residues was produced 8112 kJ energy per kg of dry PPW.
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Affiliation(s)
- Ali Soltaninejad
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mohammadhadi Jazini
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Keikhosro Karimi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Department of Chemical Engineering, Vrije Universiteit Brussel, 1050, Brussels, Belgium.
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109
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Ajewole TO, Aworinde AK, Okedere OB, Somefun TE. Agro-residues for clean electricity: in-lab trial of power generation from blended cocoa-kolanut wastes. Heliyon 2022; 8:e09091. [PMID: 35295659 PMCID: PMC8919221 DOI: 10.1016/j.heliyon.2022.e09091] [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: 11/03/2021] [Revised: 12/25/2021] [Accepted: 03/08/2022] [Indexed: 11/26/2022] Open
Abstract
As a way of wastes-to-voltage conversion, experimental benchtest trial of electricity generation from a blend of cocoa and kolanut harvest by-products is presented in this study. Bioethanol obtained from the blend, through a process of alcoholic fermentation, was mixed with gasoline at specific proportion and employed to fire a spark ignition engine that served as a prime-mover in driving a four-pole three-phase salient-pole synchronous machine. Performance of the driving machine, as the fuel-mix proportion and its speed of rotation varied, was studied. Likewise, the electric power output characteristic of the driven machine, when operated at its rated synchronous speed, was examined. It was found that the driving machine performed better on mixed fuel than pure gasoline. There were gradual increases in the torque and the power developed by the machine as the proportion of ethanol in the fuel-mix and the rotational speed increased. While the highest values of torque and power developed on using pure gasoline were 12.4 Nm and 2574 W respectively at 1900 rpm, 13.1 Nm torque and 2953 W power were obtained from the machine when ignited with 10%-bioethanol fuel-mix at the same speed. Also, with 90 Vdc excitation voltage and rotation at 1500 rpm synchronous speed, the driven machine continuously generated electricity at 207.6 Vrms (line-to-line), 1.169 A, 0.698 power factor, 48.17 Hz, 0.294 kW output. This study demonstrated the possibility of continuous generation of electric power from cocoa and kolanut wastes. Result obtained from the laboratory-based trial indicates that at such agricultural regions that are advantaged in the production of the two crops, harvest residues of the crops can be explored as a steady source of biofuel for off-grid microgrid electrification. Biofuel from a blend of cocoa/kolanut wastes was used in spark ignition engine to drive electricity generation. During an experimental trial, the driven machine unceasingly produced electric power at its maximum rating. Off-grid microgrid electrification by wastes-to-voltage conversion of the farm by-products was demonstrated.
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Affiliation(s)
- Titus O Ajewole
- Department of Electrical and Electronic Engineering, Osun State University, Osogbo, Nigeria
| | | | - Oyetunji B Okedere
- Department of Chemical Engineering, Osun State University, Osogbo, Nigeria
| | - Tobiloba E Somefun
- Department of Electrical and Information Engineering, Covenant University, Ota, Nigeria
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110
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Kley Valladares-Diestra K, Porto de Souza Vandenberghe L, Ricardo Soccol C. A biorefinery approach for pectin extraction and second-generation bioethanol production from cocoa pod husk. Bioresour Technol 2022; 346:126635. [PMID: 34971781 DOI: 10.1016/j.biortech.2021.126635] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 11/04/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
A biorefinery approach was applied for pectin extraction, xylooligosaccharides' (XOs) and bioethanol production from cocoa pod husk (CPH) using citric acid-assisted hydrothermal pretreatment. Under optimal conditions at 120° C, 10 min and 2% w.v-1 of citric acid a high pectin recovery (19.5%) with high content of uronic acids (41.9%) was obtained. In addition, the liquid fraction presented a XOs concentration of 50.4 mg.g-1 and 69.7 mg.g-1 of fermentable sugars. Enzymatic hydrolysis of solid fraction showed glucan conversion of 60%. Finally, the hydrothermal and enzymatic hydrolysates of CPH were used in bioethanol production by Candida tropicalis and Saccharomyces cerevisiae, reaching 30.9 g and 45.2 g of bioethanol per kg of CPH, respectively. An environmentally friendly and rapid pretreatment method was development for pectin extraction, XOS and second-generation bioethanol production from CPH with great perspectives for the application of these biomolecules in food and bioenergy industry.
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Affiliation(s)
- Kim Kley Valladares-Diestra
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná, Brazil, Centro Politécnico, CP 19011, Curitiba-PR, 81531-980, Brazil
| | - Luciana Porto de Souza Vandenberghe
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná, Brazil, Centro Politécnico, CP 19011, Curitiba-PR, 81531-980, Brazil.
| | - Carlos Ricardo Soccol
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná, Brazil, Centro Politécnico, CP 19011, Curitiba-PR, 81531-980, Brazil
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111
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Guo X, Zhang S, Luo J, Pan M, Du Y, Liang Y, Li T. Integrated glycolysis and pyrolysis process for multiple utilization and cadmium collection of hyperaccumulator Sedum alfredii. J Hazard Mater 2022; 422:126859. [PMID: 34449335 DOI: 10.1016/j.jhazmat.2021.126859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 06/08/2021] [Revised: 07/31/2021] [Accepted: 08/06/2021] [Indexed: 06/13/2023]
Abstract
Phytoremediation is a cost-effective and environmentally-friendly method to treat cadmium (Cd) contaminated soils, however, there is still a lack of safe disposal methods of harvested hyperaccumulators. In this study, by integrating glycolysis and pyrolysis, we investigated the possibility of bioproduct production and Cd collection from the hyperaccumulator Sedum alfredii. By means of acid-alkali pretreatment, the degree of cellulose polymerization was reduced by 36.24% while the surface accessibility was increased by 115.80%, resulting in a bioethanol yield of 9.29%. Meanwhile, 99.22% of total Cd of biomass could be reclaimed by collecting H2SO4-pretreatment waste. The saccharification residue was subsequently modified by NaOH-pretreatment-filtrate and converted into biochar at 500 °C which possessed a maximum Cd2+ sorption capacity of 60.52 mg g-1 based on the Langmuir model. Furthermore, sustainability analysis indicated that the economic input of this process is acceptable when considering its good environmental benefits. Taken together, our study provides a strategy for simultaneous bioethanol and biochar production during Cd collection from the hyperaccumulator S. alfredii, which could be a promising alternative for the suitable treatment of metal-enriched plants.
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Affiliation(s)
- Xinyu Guo
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shijun Zhang
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jipeng Luo
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Minghui Pan
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yilin Du
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yongchao Liang
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Tingqiang Li
- Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Hangzhou 310058, China; National Demonstration Center for Experimental Environment and Resources Education, Zhejiang University, Hangzhou 310058, China.
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112
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Dey N, Kumar G, Vickram AS, Mohan M, Singhania RR, Patel AK, Dong CD, Anbarasu K, Thanigaivel S, Ponnusamy VK. Nanotechnology-assisted production of value-added biopotent energy-yielding products from lignocellulosic biomass refinery - A review. Bioresour Technol 2022; 344:126171. [PMID: 34695586 DOI: 10.1016/j.biortech.2021.126171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 08/30/2021] [Revised: 10/13/2021] [Accepted: 10/17/2021] [Indexed: 05/22/2023]
Abstract
The need to develop sustainable alternatives for pretreatment and hydrolysis of lignocellulosic biomass (LCB) is a massive concern in the industrial sector today. Breaking down of LCB yields sugars and fuel in the bulk scale. If explored under nanotechnology, LCB can be refined to yield high-performance fuel sources. The toxicity and cost of conventional methods can be reduced by applying nanoparticles (NPs) in refining LCB. Immobilization of enzymes onto NPs or used in conjugation with nanomaterials would instill specific and eco-friendly options for hydrolyzing LCB. Nanomaterials increase the proficiency, reusability, and stability of enzymes. Notably, magnetic NPs have bagged their place in the downstream processing of LCB effluents due to their efficient separation and cost-effectiveness. The current review highlights the role of nanotechnology and its particles in refining LCB into various commercial precursors and value-added products. The relationship between nanotechnology and LCB refinery is portrayed effectively in the present study.
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Affiliation(s)
- Nibedita Dey
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai City, India
| | - Gopalakrishnan Kumar
- Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Box 8600 Forus 4036, Stavanger, Norway
| | - A S Vickram
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai City, India
| | - Monisha Mohan
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai City, India
| | - Reeta Rani Singhania
- Program of Aquatic Science and Technology, & Department of Marine Environmental Engineering, College of Hydrosphere Science, National Kaohsiung University of Science and Technology (NKUST), Kaohsiung City 811, Taiwan
| | - Anil Kumar Patel
- Program of Aquatic Science and Technology, & Department of Marine Environmental Engineering, College of Hydrosphere Science, National Kaohsiung University of Science and Technology (NKUST), Kaohsiung City 811, Taiwan
| | - Cheng-Di Dong
- Program of Aquatic Science and Technology, & Department of Marine Environmental Engineering, College of Hydrosphere Science, National Kaohsiung University of Science and Technology (NKUST), Kaohsiung City 811, Taiwan
| | - K Anbarasu
- Department of Bioinformatics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai City, India
| | - S Thanigaivel
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai City, India
| | - Vinoth Kumar Ponnusamy
- Program of Aquatic Science and Technology, & Department of Marine Environmental Engineering, College of Hydrosphere Science, National Kaohsiung University of Science and Technology (NKUST), Kaohsiung City 811, Taiwan; Department of Medicinal and Applied Chemistry. & Research Center for Environmental Medicine, Kaohsiung Medical University (KMU), Kaohsiung City 807, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital (KMUH), Kaohsiung City 807, Taiwan.
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Hosseinzadeh-Bandbafha H, Nazemi F, Khounani Z, Ghanavati H, Shafiei M, Karimi K, Lam SS, Aghbashlo M, Tabatabaei M. Safflower-based biorefinery producing a broad spectrum of biofuels and biochemicals: A life cycle assessment perspective. Sci Total Environ 2022; 802:149842. [PMID: 34455274 DOI: 10.1016/j.scitotenv.2021.149842] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 03/31/2021] [Revised: 08/11/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
Global environmental awareness has encouraged further research towards biofuel production and consumption. Despite the favorable properties of biofuels, the sustainability of their conventional production pathways from agricultural feedstocks has been questioned. Therefore, the use of non-food feedstocks as a promising approach to ensure sustainable biofuel production is encouraged. However, the use of synthetic solvents/chemicals and energy carriers during biofuel production and the consequent adverse environmental effects are still challenging. On the other hand, biofuel production is also associated with generating large volumes of waste and wastewater. Accordingly, the circular bioeconomy as an innovative approach to ensure complete valorization of feedstocks and generated waste streams under the biorefinery scheme is proposed. In line with that, the current study aims to assess the environmental sustainability of bioethanol production in a safflower-based biorefinery using the life cycle assessment framework. Based on the obtained results, safflower production and its processing into 1 MJ bioethanol under the safflower-based biorefinery led to damage of 2.23E-07 disability-adjusted life years (DALY), 2.35E-02 potentially disappeared fraction (PDF)*m2*yr, 4.76E-01 kg CO2 eq., and 3.82 MJ primary on the human health, ecosystem quality, climate change, and resources, respectively. Moreover, it was revealed that despite adverse environmental effects associated with safflower production and processing, the substitution of conventional products, i.e., products that are the typical products in the market without having environmental criteria, with their bio-counterparts, i.e., products produced in the biorefinery based on environmental criteria could overshadow the unfavorable effects and substantially enhance the overall sustainability of the biorefinery system. The developed safflower-based biorefinery led to seven- and two-time reduction in damage to the ecosystem quality and resources damage categories, respectively. The reductions in damage to human health and climate change were also found to be 52% and 24%, respectively. The weighted environmental impacts of the safflower-based biorefinery decreased by 64% due to the production of bioproducts, mainly biodiesel and biogas, replacing their fossil-based counterparts, i.e., diesel and natural gas, respectively. Finally, although the main focus of the developed safflower-based biorefinery was biofuel production, waste valorization and mainly animal feed played a significant role in improving the associated environmental impacts.
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Affiliation(s)
- Homa Hosseinzadeh-Bandbafha
- Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Biofuel Research Team (BRTeam), Terengganu, Malaysia
| | - Farshid Nazemi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Zahra Khounani
- Biofuel Research Team (BRTeam), Terengganu, Malaysia; Microbial Biotechnology Department, Agricultural Biotechnology Institute of Iran (ABRII), Agricultural Research, Education, and Extension Organization (AREEO), Karaj, Iran
| | - Hossein Ghanavati
- Microbial Biotechnology Department, Agricultural Biotechnology Institute of Iran (ABRII), Agricultural Research, Education, and Extension Organization (AREEO), Karaj, Iran
| | - Marzieh Shafiei
- Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Keikhosro Karimi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
| | - Mortaza Aghbashlo
- Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Department of Mechanical Engineering of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
| | - Meisam Tabatabaei
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Henan Province Forest Resources Sustainable Development and High-value Utilization Engineering Research Center, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Biofuel Research Team (BRTeam), Terengganu, Malaysia; Microbial Biotechnology Department, Agricultural Biotechnology Institute of Iran (ABRII), Agricultural Research, Education, and Extension Organization (AREEO), Karaj, Iran.
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Kazemi Shariat Panahi H, Dehhaghi M, Dehhaghi S, Guillemin GJ, Lam SS, Aghbashlo M, Tabatabaei M. Engineered bacteria for valorizing lignocellulosic biomass into bioethanol. Bioresour Technol 2022; 344:126212. [PMID: 34715341 DOI: 10.1016/j.biortech.2021.126212] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 08/30/2021] [Revised: 10/17/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Appropriate bioprocessing of lignocellulosic materials into ethanol could address the world's insatiable appetite for energy while mitigating greenhouse gases. Bioethanol is an ideal gasoline extender and is widely used in many countries in blended form with gasoline at specific ratios to improve fuel characteristics and engine performance. Although the bioethanol production industry has long been operational, finding a suitable microbial agent for the efficient conversion of lignocelluloses is still an active field of study. Among available microbial candidates, engineered bacteria may be promising ethanol producers while may show other desired traits such as thermophilic nature and high ethanol tolerance. This review provides the current knowledge on the introduction, overexpression, and deletion of the genes that have been performed in bacterial hosts to achieve higher ethanol yield, production rate and titer, and tolerance. The constraints and possible solutions and economic feasibility of the processes utilizing such engineered strains are also discussed.
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Affiliation(s)
- Hamed Kazemi Shariat Panahi
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou, Henan, 450002, China; Neuroinflammation Group, Department of Biomedical Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia; Biofuel Research Team (BRTeam), Terengganu, Malaysia
| | - Mona Dehhaghi
- Neuroinflammation Group, Department of Biomedical Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia; Biofuel Research Team (BRTeam), Terengganu, Malaysia; PANDIS.org, Australia
| | - Somayeh Dehhaghi
- Department of Agricultural Extension and Education, Tarbiat Modares University, Tehran 14115-336, Iran
| | - Gilles J Guillemin
- Neuroinflammation Group, Department of Biomedical Sciences, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia; PANDIS.org, Australia
| | - Su Shiung Lam
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou, Henan, 450002, China; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
| | - Mortaza Aghbashlo
- Department of Mechanical Engineering of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Meisam Tabatabaei
- Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou, Henan, 450002, China; Biofuel Research Team (BRTeam), Terengganu, Malaysia; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Microbial Biotechnology Department, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
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Patel AK, Saini JK, Singhania RR. Development of multiple inhibitor tolerant yeast via adaptive laboratory evolution for sustainable bioethanol production. Bioresour Technol 2022; 344:126247. [PMID: 34740795 DOI: 10.1016/j.biortech.2021.126247] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [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: 09/16/2021] [Revised: 10/24/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
The present research work aimed at developing robust yeast cell factory via adaptive laboratory evolution (ALE) for improved cellulosic bioethanol production. Kluyveromyces marxianus JKH5, a newly isolated thermotolerant ethanologenic yeast, was engineered by serial passaging for 60 generations in medium supplemented with gradually higher concentration of inhibitors (acetic acid, furfural, and vanillin) that are generated during dilute acid pretreatment. The improved strain K. marxianus JKH5 C60, showed 3.3-fold higher specific growth rate, 56% reduced lag phase and 80% enhanced fermentation efficiency at 42 °C in comparison to parent strain in inhibitor cocktail comprising medium. Bioethanol production by simultaneous saccharification and fermentation of sequential dilute acid-alkali pretreated sugarcane bagasse in presence of inhibitors, resulted in ethanol titre and yield, respectively, 54.8 ± 0.9 g/L and 0.40 g/g. The adapted yeast can be used to ferment unwashed pretreated biomass, thereby, reducing overall cost, time, and wastewater generation, hence making bioethanol production sustainable.
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Affiliation(s)
- Anil Kumar Patel
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Jitendra Kumar Saini
- Department of Microbiology, Central University of Haryana, Mahendergarh, Haryana 123031, India.
| | - Reeta Rani Singhania
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
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Salelign K, Duraisamy R. Sugar and ethanol production potential of sweet potato ( Ipomoea batatas) as an alternative energy feedstock: processing and physicochemical characterizations. Heliyon 2021; 7:e08402. [PMID: 34869926 DOI: 10.1016/j.heliyon.2021.e08402] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/09/2021] [Accepted: 11/11/2021] [Indexed: 12/01/2022] Open
Abstract
This study focuses on the processing, characterization, and sugar and ethanol production potential of red-fleshed sweet potatoes (RFSP) and white-fleshed sweet potatoes (WFSP). These feedstocks were used for the production of sugar; and bioethanol from its pulp by the action of five different microbes. The characterization of raw sweet potatoes and desired products of raw sugar, and bioethanol were carried out through proximate analyses, Fourier transforms infrared spectroscopic (FTIR) method, measurement of pol% by using a Refractometer, Polarimeter, Saccharimeter. The proximate analyses of feedstocks show the presence of a respectable amount of dry solids 25 ± 0.03g/100g with a lower amount of fat (0.025 ± 0.002) and ash (0.533 ± 0.076) contents make them promising crops for the production of sugar and ethanol. Comparatively, RFSP raw sugar (oZ: 95.25 ± 0.05) is considered purer than WFSP raw sugar (oZ: 94.6 ± 0.015). FTIR spectrums of the presently studied raw sugar and bioethanol have characteristic bands. It shows that the raw sugars products are rich in sucrose content, and confirms that the bioethanol was produced from the selected raw materials is at a satisfactory level. The efficiency of microbes was evaluated by taking a sample from the fermented wash to measure the residual sugar in (oBrix). Comparatively, fermented wash with sweet potato extracted yeast was found 14% Brixo (consume 86% of pulp) in RFSP, and 17% of Brixo (consume 83% pulp) in WFSP within 24 hours of fermentation. The alcohol level of bioethanol's produced from RFSP and WFSP pulps was tested using Ebuliometer and the result was found to be ranged 78 °C – 80 °C which is closer to the boiling point of absolute anhydrous alcohol (78.3 °C). Thus, the results of the present study proved that the sweet potato and its pulp are considered as a potential alternative sugar/energy feedstock. Sweet potato is a cheaper sugar-containing crop and abundant resource. Red-fleshed sweet potato has greater sucrose content with higher purity (95.42 g/L). Industries can ease the production of sugar & bioethanol using sweet potato. Efficiency of studied inoculums is graded as: SPY > LEY > SCY > KEY > SRB.
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Bibi F, Yasmin H, Jamal A, Al-Harbi MS, Ahmad M, Zafar M, Ahmad B, Samra BN, Ahmed AF, Ali MI. Deciphering role of technical bioprocess parameters for bioethanol production using microalgae. Saudi J Biol Sci 2021; 28:7595-7606. [PMID: 34867064 PMCID: PMC8626319 DOI: 10.1016/j.sjbs.2021.10.011] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/03/2021] [Accepted: 10/04/2021] [Indexed: 12/07/2022] Open
Abstract
Microalgae biomass is considered an important feedstock for biofuels and other bioactive compounds due to its faster growth rate, high biomass production and high biomolecules accumulation over first and second-generation feedstock. This research aimed to maximize the specific growth rate of fresh water green microalgae Closteriopsis acicularis, a member of family Chlorellaceae under the effect of pH and phosphate concentration to attain enhanced biomass productivity. This study investigates the individual and cumulative effect of phosphate concentration and pH on specific growth characteristics of Closteriopsis acicularis in autotrophic mode of cultivation for bioethanol production. Central-Composite Design (CCD) strategy and Response Surface Methodology (RSM) was used for the optimization of microalga growth and ethanol production under laboratory conditions. The results showed that high specific growth rate and biomass productivity of 0.342 day-1 and 0.497 g L-1 day-1 respectively, were achieved at high concentration of phosphate (0.115 g L-1) and pH (9) at 21st day of cultivation. The elemental composition of optimized biomass has shown enhanced elemental accumulation of certain macro (C, O, P) and micronutrients (Na, Mg, Al, K, Ca and Fe) except for nitrogen and sulfur. The Fourier transform infrared spectroscopic analysis has revealed spectral peaks and high absorbance in spectral range of carbohydrates, lipids and proteins, in optimized biomass. The carbohydrates content of optimized biomass was observed as 58%, with 29.3 g L-1 of fermentable sugars after acid catalyzed saccharification. The bioethanol yield was estimated as 51 % g ethanol/g glucose with maximum of 14.9 g/L of bioethanol production. In conclusion, it can be inferred that high specific growth rate and biomass productivity can be achieved by varying levels of phosphate concentration and pH during cultivation of Closteriopsis acicularis for improved yield of microbial growth, biomass and bioethanol production.
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Affiliation(s)
- Farhana Bibi
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Humaira Yasmin
- Department of Biosciences, COMSATS University Islamabad (CUI), Islamabad, Pakistan
| | - Asif Jamal
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Mohammad S Al-Harbi
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mushtaq Ahmad
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Zafar
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Bashir Ahmad
- Department of Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Bassem N Samra
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Atef F Ahmed
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
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Chang D, Islam ZU, Zheng J, Zhao J, Cui X, Yu Z. Inhibitor tolerance and bioethanol fermentability of levoglucosan-utilizing Escherichia coli were enhanced by overexpression of stress-responsive gene ycfR: The proteomics-guided metabolic engineering. Synth Syst Biotechnol 2021; 6:384-395. [PMID: 34853817 PMCID: PMC8605246 DOI: 10.1016/j.synbio.2021.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/21/2021] [Revised: 08/28/2021] [Accepted: 11/08/2021] [Indexed: 01/06/2023] Open
Abstract
Pretreatment of lignocellulosic biomass is crucial for the release of biofermentable sugars for biofuels production, which could greatly alleviate the burgeoning environment and energy crisis caused by the massive usage of traditional fossil fuels. Pyrolysis is a cost-saving pretreatment process that can readily decompose biomass into levoglucosan, a promising anhydrosugar; however, many undesired toxic compounds inhibitory to downstream microbial fermentation are also generated during the pyrolysis, immensely impeding the bioconversion of levoglucosan-containing pyrolysate. Here, we took the first insight into the proteomic responses of a levoglucosan-utilizing and ethanol-producing Escherichia coli to three representative biomass-derived inhibitors, identifying large amounts of differentially expressed proteins (DEPs) that could guide the downstream metabolic engineering for the development of inhibitor-resistant strains. Fifteen up- and eight down-regulated DEPs were further identified as the biomarker stress-responsive proteins candidate for cellular tolerance to multiple inhibitors. Among these biomarker proteins, YcfR exhibiting the highest expression fold-change level was chosen as the target of overexpression to validate proteomics results and develop robust strains with enhanced inhibitor tolerance and fermentation performance. Finally, based on four plasmid-borne genes encoding the levoglucosan kinase, pyruvate decarboxylase, alcohol dehydrogenase, and protein YcfR, a new recombinant strain E. coli LGE-ycfR was successfully created, showing much higher acetic acid-, furfural-, and phenol-tolerance levels compared to the control without overexpression of ycfR. The specific growth rate, final cell density, ethanol concentration, ethanol productivity, and levoglucosan consumption rate of the recombinant were also remarkably improved. From the proteomics-guided metabolic engineering and phenotypic observations, we for the first time corroborated that YcfR is a stress-induced protein responsive to multiple biomass-derived inhibitors, and also developed an inhibitors-resistant strain that could produce bioethanol from levoglucosan in the presence of inhibitors of relatively high concentration. The newly developed E. coli LGE-ycfR strain that could eliminate the commonly-used costly detoxicification processes, is of great potential for the in situ cost-effective bioethanol production from the biomass-derived pyrolytic substrates.
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Affiliation(s)
- Dongdong Chang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Zia Ul Islam
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, PR China
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
| | - Junfang Zheng
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, PR China
| | - Jie Zhao
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Xiaoyong Cui
- Yanshan Earth Critical Zone and Surface Fluxes Research Station, Chinese Academy of Sciences, No. 380 Huaibei Town, Huairou District, Beijing, 101408, PR China
| | - Zhisheng Yu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, PR China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, 100085, PR China
- Corresponding author. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, PR China.
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Parascanu MM, Sanchez N, Sandoval-Salas F, Carreto CM, Soreanu G, Sanchez-Silva L. Environmental and economic analysis of bioethanol production from sugarcane molasses and agave juice. Environ Sci Pollut Res Int 2021; 28:64374-64393. [PMID: 34304359 PMCID: PMC8610961 DOI: 10.1007/s11356-021-15471-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
In this article, sugarcane molasses and agave juice were compared as potential feedstocks for producing bioethanol in Mexico in terms of their environmental impact and economic factors. Life cycle assessment (LCA) using SimaPro was carried out to calculate environmental impacts by using a cradle-to-gate approach. A preliminary economic analysis was performed to determine the economic feasibility of the studied options. Also, capital goods costs were obtained using the Aspen Plus economy package. Moreover, a sensitivity analysis was involved to compare the environmental and economic viability of producing bioethanol from sugarcane molasses and agave juice. LCA results revealed that cultivation and fermentation were the most harmful stages when producing bioethanol from sugarcane molasses and agave juice, respectively. Furthermore, when it was derived from agave juice rather than sugarcane molasses, it had more environmental benefits. This was ascribed to the lower consumption rate of fertilizers, pesticides, and emissions given off from the former. Regarding financial aspects, the preliminary analysis showed that producing bioethanol was not economically viable when grid energy alone was used. However, if power from the grid is partially replaced with renewable energy, producing bioethanol becomes economically feasible, and sugarcane molasses is the most suitable feedstock.
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Affiliation(s)
| | - Nestor Sanchez
- Energy, Materials and Environmental Laboratory, Department of Chemical and Biochemical Processes, Universidad de La Sabana, Campus Universitario Puente del Común, km. 7 Autopista Norte, Bogotá, Colombia
| | | | | | - Gabriela Soreanu
- Department of Environmental Engineering and Management, Technical University "Gheorghe Asachi" of Iasi, Iasi, Romania
| | - Luz Sanchez-Silva
- Department of Chemical Engineering, University of Castilla-La Mancha, Ciudad Real, Spain.
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Palanisamy A, Soundarrajan N, Ramasamy G. Analysis on production of bioethanol for hydrogen generation. Environ Sci Pollut Res Int 2021; 28:63690-63705. [PMID: 34050510 DOI: 10.1007/s11356-021-14554-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 06/09/2020] [Accepted: 05/19/2021] [Indexed: 06/12/2023]
Abstract
Bioethanol is a renewable energy source carrier mainly produced from the biomass fermentation process. Reforming of bioethanol for hydrogen production is the most promising method from the renewable energy source. Production of hydrogen from ethanol reforming process is not only environmentally friendly, but also it produces greater opportunities for use of renewable energy source, which are available and affect the catalytic activity of the process. This paper reviewed the various reforming processes and associated noble and non-noble catalysts and supporting layers for the reforming process. Among that, electrochemical reforming of bioethanol is found to be cost-effective, and hydrogen production is also found to be of high purity. Hydrogen production from ethanol through various reforming processes is still in the research for better hydrogen production. Hydrogen production through the process of reforming can be widely used for fuel cell operations.
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Affiliation(s)
- Abirami Palanisamy
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Sriperumbudur Tk, Tamil Nadu, 602 117, India
| | - Nivedha Soundarrajan
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Sriperumbudur Tk, Tamil Nadu, 602 117, India
| | - Govindarasu Ramasamy
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Sriperumbudur Tk, Tamil Nadu, 602 117, India.
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Bhushan S, Rana MS, Bhandari M, Sharma AK, Simsek H, Prajapati SK. Enzymatic pretreatment of algal biomass has different optimal conditions for biogas and bioethanol routes. Chemosphere 2021; 284:131264. [PMID: 34216928 DOI: 10.1016/j.chemosphere.2021.131264] [Citation(s) in RCA: 3] [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: 04/08/2021] [Revised: 05/27/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
Enzymatic pretreatment is emerging as an efficient tool for the extraction of biofuel precursors from algal biomass. However, yardsticks for end-use directed selection of optimal pretreatment conditions are not yet identified. The present study, for the first time, reveals different optimal conditions for algal biomass solubilization and sugar release. Algal biomass pretreatment optimization was carried out using the Taguchi method. Crude enzyme from Aspergillus fischeri was found effective for pretreatment of Chlorella pyrenoidosa. Maximum sugar yield (190 mg g-1 biomass) from algal biomass was observed at a substrate concentration of 4 g L-1, with a 5% enzyme load at temperature 60°C, pH 5.5, and shaking speed of 80 rpm. In contrast, maximum sCOD (1350 mg g-1 biomass) was obtained at 2 g L-1 substrate concentration with enzyme load of 20% v/v, at 60°C, pH 4, and shaking speed of 100 rpm. Hence, the first set of conditions would be more beneficial for bioethanol production. Whereas another set of conditions would improve the biofuel production that requires maximum solubilization of algal biomass, such as fermentative methane production. Overall, the present observations established that process conditions required for enzymatic pretreatment of algal biomass should be selected according to the desired biofuel type.
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Affiliation(s)
- Shashi Bhushan
- Environment and Biofuel Research Lab (EBRL), Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee (IIT-R), Uttarakhand, 247667, India; Department of Agricultural and Biosystem Engineering, North Dakota State University (NDSU), North Dakota, 58102, USA
| | - Mohit Singh Rana
- Environment and Biofuel Research Lab (EBRL), Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee (IIT-R), Uttarakhand, 247667, India
| | - Mamta Bhandari
- Environment and Biofuel Research Lab (EBRL), Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee (IIT-R), Uttarakhand, 247667, India
| | - Ashwini Kumar Sharma
- Department of Chemical Engineering, Indian Institute of Technology Roorkee (IIT-R), Uttarakhand, 247667, India
| | - Halis Simsek
- Department of Agricultural and Biosystem Engineering, North Dakota State University (NDSU), North Dakota, 58102, USA
| | - Sanjeev Kumar Prajapati
- Environment and Biofuel Research Lab (EBRL), Department of Hydro and Renewable Energy, Indian Institute of Technology Roorkee (IIT-R), Uttarakhand, 247667, India.
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Scapini T, Dos Santos MSN, Bonatto C, Wancura JHC, Mulinari J, Camargo AF, Klanovicz N, Zabot GL, Tres MV, Fongaro G, Treichel H. Hydrothermal pretreatment of lignocellulosic biomass for hemicellulose recovery. Bioresour Technol 2021; 342:126033. [PMID: 34592451 DOI: 10.1016/j.biortech.2021.126033] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [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: 07/22/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
The hemicellulosic fraction recovery is of interest for integrated processes in biorefineries, considering the possibility of high economic value products produced from their structural compounds of this polysaccharide. However, to perform an efficient recovery, it is necessary to use biomass fractionation techniques, and hydrothermal pretreatment is highlighted as a valuable technique in the hemicellulose recovery by applying high temperatures and pressure, causing dissolution of the structure. Considering the possibility of this pretreatment technique for current approaches to hemicellulose recovery, this article aimed to explore the relevance of hydrothermal pretreatment techniques (sub and supercritical water) as a strategy for recovering the hemicellulosic fraction from lignocellulosic biomass. Discussions about potential products to be generated, current market profile, and perspectives and challenges of applying the technique are also addressed.
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Affiliation(s)
- Thamarys Scapini
- Laboratory of Microbiology and Bioprocess (LAMIBI), Federal University of Fronteira Sul, Erechim, RS, Brazil; Department of Biological Science, Graduate Program in Biotechnology and Bioscience, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Maicon S N Dos Santos
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, Cachoeira do Sul, RS, Brazil
| | - Charline Bonatto
- Laboratory of Microbiology and Bioprocess (LAMIBI), Federal University of Fronteira Sul, Erechim, RS, Brazil
| | | | - Jéssica Mulinari
- Laboratory of Membrane Processes, Department of Chemical Engineering and Food Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Aline F Camargo
- Laboratory of Microbiology and Bioprocess (LAMIBI), Federal University of Fronteira Sul, Erechim, RS, Brazil; Department of Biological Science, Graduate Program in Biotechnology and Bioscience, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Natalia Klanovicz
- Laboratory of Microbiology and Bioprocess (LAMIBI), Federal University of Fronteira Sul, Erechim, RS, Brazil; Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, Escola Politécnica, University of São Paulo, São Paulo, SP, Brazil
| | - Giovani L Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, Cachoeira do Sul, RS, Brazil
| | - Marcus V Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, Cachoeira do Sul, RS, Brazil
| | - Gislaine Fongaro
- Department of Biological Science, Graduate Program in Biotechnology and Bioscience, Federal University of Santa Catarina, Florianópolis, SC, Brazil; Laboratory of Applied Virology, Department of Microbiology, Immunology, and Parasitology, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Helen Treichel
- Laboratory of Microbiology and Bioprocess (LAMIBI), Federal University of Fronteira Sul, Erechim, RS, Brazil; Department of Biological Science, Graduate Program in Biotechnology and Bioscience, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
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123
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Álvarez C, González A, Ballesteros I, Negro MJ. Production of xylooligosaccharides, bioethanol, and lignin from structural components of barley straw pretreated with a steam explosion. Bioresour Technol 2021; 342:125953. [PMID: 34555750 DOI: 10.1016/j.biortech.2021.125953] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 07/28/2021] [Revised: 09/10/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
Barley straw (BS) is a potential source to obtain bioethanol and value-added products such as xylooligosaccharides (XOS) and lignin for application in diverse industries. In this study, BS was submitted to steam explosion pretreatment to valorize the main components of this lignocellulose biomass. For hemicellulose fraction valorization, different combinations of endo-β-(1,4)-D-xylanase enzyme with accessory enzymes (α-L-arabinofuranosidase, feruloy -esterase and acetylxylan-esterase) have been studied to produce XOS with a low degree of polymerization. The application of accessory enzymes combined with endo-β-(1,4)-D-xylanase enzymes turned out to be the most effective strategy for the formation of XOS. The solid fraction obtained after the pretreatment was submitted to presacharification and simultaneous saccharification and fermentation process for bioethanol production. The resulting lignin-rich residue was characterized. In this integrated process, 13.0 g XOS (DP2-DP6), 12.6 g ethanol and 16.6 g lignin were obtained from 100 g of BS, achieving the goal of valorizing this agricultural residue.
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Affiliation(s)
- Cristina Álvarez
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
| | - Alberto González
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
| | - Ignacio Ballesteros
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
| | - María José Negro
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
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124
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Rajamanickam SK, Kasinathan S. Fatty acid ethyl ester from Manilkara zapota seed oil: a completely renewable biofuel for sustainable development. Environ Sci Pollut Res Int 2021; 28:61790-61800. [PMID: 34189688 DOI: 10.1007/s11356-021-15078-9] [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: 01/27/2021] [Accepted: 06/19/2021] [Indexed: 06/13/2023]
Abstract
This article reports the deliverables of the experimental study on the production of a completely renewable biofuel from Manilkara zapota fruit and seed oil. It was attempted to synthesis ethyl ester from Manilkara zapota seed oil using bioethanol synthesized from decayed Manilkara zapota fruit. Bioethanol was produced through fermentation of decayed Manilkara zapota fruit, waste skin, and pulp with Saccharomyces cerevisiae and then distilled at 72°C. The bioethanol yield was noted as 10.45% (v/w). The 95.09% pure bioethanol and 4.9% water molecules were present in the distilled sample. Mechanically extracted raw Manilkara zapota seed oil was used for ethyl ester conversion. The molar ratio of bioethanol to oil, the quantity of KOH, and process temperature were investigated for the maximum yield of Manilkara zapota ethyl ester. A 9:1 molar ratio of bioethanol to oil, 1.5% (w/w) KOH, and 70°C process temperature were identified as enhanced ethanolysis process parameters. The maximum yield of ethyl ester was identified as 93.1%. Physicochemical characteristics of Manilkara zapota oil, bioethanol, and ethyl ester were measured as per the corresponding ASTM standards. It was found that both Manilkara Zapota ethyl ester and bioethanol synthesized from decayed Manilkara zapota fruit could be promising substitutes for fossil diesel and gasoline.
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Affiliation(s)
- Sathish Kumar Rajamanickam
- Department of Automobile Engineering, Hindustan Institute of Technology and Science, Padur, Tamil Nadu, 603 103, India.
| | - Sureshkumar Kasinathan
- Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603 203, India
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125
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Del Río PG, Gullón B, Pérez-Pérez A, Romaní A, Garrote G. Microwave hydrothermal processing of the invasive macroalgae Sargassum muticum within a green biorefinery scheme. Bioresour Technol 2021; 340:125733. [PMID: 34426234 DOI: 10.1016/j.biortech.2021.125733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 07/02/2021] [Revised: 08/03/2021] [Accepted: 08/05/2021] [Indexed: 06/13/2023]
Abstract
This study deals with the multiproduct valorization of the invasive macroalgae Sargassum muticum within a green biorefinery concept using microwave hydrothermal treatment. Temperatures of 160 and 180 °C for 0-60 min (severities 1.62-3.54) were evaluated, allowing a recovery of a liquid phase rich in fucoidan-derived compounds (up to 4.81 g/L), oligomers and phenolics with antioxidant capacity (up to 2.85 g TE/L by ABTS assay), and a high-enzymatically susceptible solid (glucan to glucose conversion 76-100% in 9 h) suitable for bioethanol production (20.5 g/L in 18 h, corresponding to 96% ethanol yield). Moreover, energy consumption of the pretreatments' temperature-time binomial was evaluated showing significant differences, demonstrating the advantages of microwave as alternative heating pretreatment.
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Affiliation(s)
- Pablo G Del Río
- Universidade de Vigo, Departamento de Enxeñaría Química, Facultade de Ciencias, 32004 Ourense, Spain.
| | - Beatriz Gullón
- Universidade de Vigo, Departamento de Enxeñaría Química, Facultade de Ciencias, 32004 Ourense, Spain
| | - Alba Pérez-Pérez
- Universidade de Vigo, Departamento de Enxeñaría Química, Facultade de Ciencias, 32004 Ourense, Spain
| | - Aloia Romaní
- Universidade de Vigo, Departamento de Enxeñaría Química, Facultade de Ciencias, 32004 Ourense, Spain
| | - Gil Garrote
- Universidade de Vigo, Departamento de Enxeñaría Química, Facultade de Ciencias, 32004 Ourense, Spain
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Merritt H, Barragán-Ocaña A. The impact of market factors on the development of eco-friendly energy technologies: the case of bioethanol. Clean Technol Environ Policy 2021; 25:313-321. [PMID: 34744554 PMCID: PMC8556787 DOI: 10.1007/s10098-021-02225-6] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
UNLABELLED Global warming is emerging as the most serious concern for the planet, with greenhouse gas emissions (GHG) contributing considerably to the problem. Consequently, warranting energy sustainability has turned into an urgent issue for scholars and policy-makers alike. Bioethanol has emerged as a viable eco-friendly replacement for avoiding GHG generating fossil fuels. However, bioethanol has faced several hurdles that have discouraged its development during these years. Apart from unpractical technological applications and failed ventures, bioethanol has been experiencing heavy competition from hydrocarbon fuels and adverse economic cycles. Currently, bioethanol is facing an uncertain scenario due to the combination of climbing crop prices and slow innovative production processes, including the cost-effective utilization of agriculture waste. Here, the impact of market conditions upon the competitive development of bioethanol is analyzed. It is argued that fluctuating fossil fuel prices over the last ten years has discouraged bioethanol's technological viability. As a result, the consolidation of industrial biotechnology, especially for biorefineries, has slowed down. Policy implications of recurrent fluctuations in the bioethanol market are also discussed. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10098-021-02225-6.
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Affiliation(s)
- Humberto Merritt
- Instituto Politécnico Nacional, CIECAS, Lauro Aguirre # 120, Col. Agricultura, México, CDMX 11360 México
| | - Alejandro Barragán-Ocaña
- Instituto Politécnico Nacional, CIECAS, Lauro Aguirre # 120, Col. Agricultura, México, CDMX 11360 México
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127
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Chang D, Wang C, Ndayisenga F, Yu Z. Mutations in adaptively evolved Escherichia coli LGE2 facilitated the cost-effective upgrading of undetoxified bio-oil to bioethanol fuel. BIORESOUR BIOPROCESS 2021; 8:105. [PMID: 38650237 PMCID: PMC10991953 DOI: 10.1186/s40643-021-00459-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 09/10/2021] [Accepted: 10/11/2021] [Indexed: 11/10/2022] Open
Abstract
Levoglucosan is a promising sugar present in the lignocellulose pyrolysis bio-oil, which is a renewable and environment-friendly source for various value-added productions. Although many microbial catalysts have been engineered to produce biofuels and chemicals from levoglucosan, the demerits that these biocatalysts can only utilize pure levoglucosan while inhibited by the inhibitors co-existing with levoglucosan in the bio-oil have greatly limited the industrial-scale application of these biocatalysts in lignocellulose biorefinery. In this study, the previously engineered Escherichia coli LGE2 was evolved for enhanced inhibitor tolerance using long-term adaptive evolution under the stress of multiple inhibitors and finally, a stable mutant E. coli-H was obtained after ~ 374 generations' evolution. In the bio-oil media with an extremely acidic pH of 3.1, E. coli-H with high inhibitor tolerance exhibited remarkable levoglucosan consumption and ethanol production abilities comparable to the control, while the growth of the non-evolved strain was completely blocked even when the pH was adjusted to 7.0. Finally, 8.4 g/L ethanol was achieved by E. coli-H in the undetoxified bio-oil media with ~ 2.0% (w/v) levoglucosan, reaching 82% of the theoretical yield. Whole-genome re-sequencing to monitor the acquisition of mutations identified 4 new mutations within the globally regulatory genes rssB, yqhA, and basR, and the - 10 box of the putative promoter of yqhD-dgkA operon. Especially, yqhA was the first time to be revealed as a gene responsible for inhibitor tolerance. The mutations were all responsible for improved fitness, while basR mutation greatly contributed to the fitness improvement of E. coli-H. This study, for the first time, generated an inhibitor-tolerant levoglucosan-utilizing strain that could produce cost-effective bioethanol from the toxic bio-oil without detoxification process, and provided important experimental evidence and valuable genetic/proteinic information for the development of other robust microbial platforms involved in lignocellulose biorefining processes.
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Affiliation(s)
- Dongdong Chang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Cong Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Fabrice Ndayisenga
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Zhisheng Yu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, 100085, People's Republic of China.
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128
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Dave N, Varadavenkatesan T, Selvaraj R, Vinayagam R. Modelling of fermentative bioethanol production from indigenous Ulva prolifera biomass by Saccharomyces cerevisiae NFCCI1248 using an integrated ANN-GA approach. Sci Total Environ 2021; 791:148429. [PMID: 34412402 DOI: 10.1016/j.scitotenv.2021.148429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 05/01/2021] [Revised: 06/04/2021] [Accepted: 06/09/2021] [Indexed: 06/13/2023]
Abstract
Third generation biomass (marine macroalgae) has been projected as a promising alternative energy resource for bioethanol production due to its high carbon and no lignin composition. However, the major challenge in the technologies of production lies in the fermentative bioconversion process. Therefore, in the present study the predictive ability of an integrated artificial neural network with genetic algorithm (ANN-GA) in the modelling of bioethanol production was investigated for an indigenous marine macroalgal biomass (Ulva prolifera) by a novel yeast strain, Saccharomyces cerevisiae NFCCI1248 using six fermentative parameters, viz., substrate concentration, fermentation time, inoculum size, temperature, agitation speed and pH. The experimental model was developed using one-variable-at-a-time (OVAT) method to analyze the effects of the fermentative parameters on bioethanol production and the obtained regression equation was used as a fitness function for the ANN-GA modelling. The ANN-GA model predicted a maximum bioethanol production at 30 g/L substrate, 48 h fermentation time, 10% (v/v) inoculum, 30 °C temperature, 50 rpm agitation speed and pH 6. The maximum experimental bioethanol yield obtained after applying ANN-GA was 0.242 ± 0.002 g/g RS, which was in close proximity with the predicted value (0.239 g/g RS). Hence, the developed ANN-GA model can be applied as an efficient approach for predicting the fermentative bioethanol production from macroalgal biomass.
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Affiliation(s)
- Niyam Dave
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Thivaharan Varadavenkatesan
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
| | - Raja Selvaraj
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Ramesh Vinayagam
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
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129
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Belini VL, Junior OM, Ceccato-Antonini SR, Suhr H, Wiedemann P. Morphometric quantification of a pseudohyphae forming Saccharomyces cerevisiae strain using in situ microscopy and image analysis. J Microbiol Methods 2021; 190:106338. [PMID: 34597736 DOI: 10.1016/j.mimet.2021.106338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 08/04/2021] [Revised: 09/21/2021] [Accepted: 09/21/2021] [Indexed: 11/30/2022]
Abstract
Yeast morphology and counting are highly important in fermentation as they are often associated with productivity and can be influenced by process conditions. At present, time-consuming and offline methods are utilized for routine analysis of yeast morphology and cell counting using a haemocytometer. In this study, we demonstrate the application of an in situ microscope to obtain a fast stream of pseudohyphae images from agitated sample suspensions of a Saccharomyces cerevisiae strain, whose morphology in cell clusters is frequently found in the bioethanol fermentation industry. The large statistics of microscopic images allow for online determination of the principal morphological characteristics of the pseudohyphae, including the number of constituent cells, cell-size, number of branches, and length of branches. The distributions of these feature values are calculated online, constituting morphometric monitoring of the pseudohyphae population. By providing representative data, the proposed system can improve the effectiveness of morphological characterization, which in turn can help to improve the understanding and control of bioprocesses in which pseudohyphal-like morphologies are found.
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Affiliation(s)
- Valdinei L Belini
- Department of Electrical Engineering, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235, São Carlos, SP CEP 13565-905, Brazil.
| | - Orides M Junior
- Computing Department, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235, São Carlos, SP CEP 13565-905, Brazil
| | - Sandra R Ceccato-Antonini
- Department of Agroindustrial Technology and Rural Socio-Economics, Universidade Federal de São Carlos, Via Anhanguera, km 174, Araras, SP CEP 13600-970, Brazil
| | - Hajo Suhr
- Department of Information Technology, Mannheim University of Applied Sciences, Paul-Wittsack-Straße 10, 68163 Mannheim, Germany
| | - Philipp Wiedemann
- Department of Biotechnology, Mannheim University of Applied Sciences, Paul-Wittsack-Straße 10, 68163 Mannheim, Germany
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130
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Baghel RS, Reddy CRK, Singh RP. Seaweed-based cellulose: Applications, and future perspectives. Carbohydr Polym 2021; 267:118241. [PMID: 34119188 DOI: 10.1016/j.carbpol.2021.118241] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [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: 03/12/2021] [Revised: 05/03/2021] [Accepted: 05/17/2021] [Indexed: 12/15/2022]
Abstract
Cellulose is a naturally occurring organic polymer extracted mainly from lignocellulosic biomass of terrestrial origin. However, the increasing production of seaweeds for growing global market demands has developed the opportunity to use it as an additional cellulose source. This review aims to prepare comprehensive information to understand seaweed cellulose and its possible applications better. This is the first review that summarizes and discusses the cellulose from all three types (green, red, and brown) of seaweeds in various aspects such as contents, extraction strategies, and cellulose-based products. The seaweed cellulose applications and future perspectives are also discussed. Several seaweed species were found to have significant cellulose content (9-34% dry weight). The review highlights that the properties of seaweed cellulose-based products were comparable to products prepared from plant-based cellulose. Overall, this work demonstrates that cellulose could be economically extracted from phycocolloids industrial waste and selected cellulose-rich seaweed species for various commercial applications.
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Affiliation(s)
- Ravi S Baghel
- Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India.
| | - C R K Reddy
- Indian Centre for Climate and Societal Impact Research, Vivekanand Research and Training Institute, Mandvi-Katch, Gujarat 370465, India
| | - Ravindra Pal Singh
- Food and Nutritional Biotechnology Division, National Agri-Food Biotechnology Institute (NABI), SAS Nagar, Punjab 140306, India
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131
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Vancov T, Palmer J, Keen B. Pilot scale demonstration of a two-stage pretreatment and bioethanol fermentation process for cotton gin trash. Bioresour Technol 2021; 335:125224. [PMID: 33984554 DOI: 10.1016/j.biortech.2021.125224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/16/2021] [Revised: 04/21/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
A two-stage dilute acid and steam explosion (SE) pretreatment process was developed and evaluated at pilot scale for ethanol production from cotton gin trash (CGT). Optimal conditions for CGT processing were defined as 1:6 solids to liquids ratio with 9% H2SO4 wt. on solids at 180 °C for 15 min. during stage 1 with ensuing pressed fibres successively exposed to SE at 200 °C for 5 min during stage 2. SE fibres were highly acquiescent to enzyme hydrolysis (76%) in the presence of PEG 6000, yielding 381 g glucose kg-1 fibre. Simultaneous saccharification and fermentation (SSF) trials validated the selected process option and additional fed-batch SSFs confirmed titres above the minimum 4% ww-1 benchmark for economically viable distillation. The practicality of converting CGT to ethanol was demonstrated at pilot scale with titres above 4% ww-1 and a conversion efficiency of 60% t-1 dry GCT.
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Affiliation(s)
- T Vancov
- NSW Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, NSW, Australia.
| | - J Palmer
- NSW Department of Primary Industries, Wollongbar Primary Industries Institute, NSW, Australia
| | - B Keen
- NSW Department of Primary Industries, Wollongbar Primary Industries Institute, NSW, Australia
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132
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Prieto A, de Eugenio L, Méndez-Líter JA, Nieto-Domínguez M, Murgiondo C, Barriuso J, Bejarano-Muñoz L, Martínez MJ. Fungal glycosyl hydrolases for sustainable plant biomass valorization: Talaromyces amestolkiae as a model fungus. Int Microbiol 2021; 24:545-558. [PMID: 34417929 DOI: 10.1007/s10123-021-00202-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 06/02/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 11/26/2022]
Abstract
As the main decomposers and recyclers in nature, fungi secrete complex mixtures of extracellular enzymes for degradation of plant biomass, which is essential for mobilization of the organic carbon fixed by the photosynthesis in vegetal cells. Biotechnology can emulate the closed natural biological cycles, using lignocellulosic biomass as a renewable resource and lignocellulolytic fungal enzymes as catalysts to sustainably produce consumer goods. Cellulose and hemicellulose are the major polysaccharides on Earth, and the main enzymes involved in their hydrolytic depolymerization are cellulases (endoglucanases, cellobiohydrolases, and β-glucosidases) and hemicellulases (mainly endoxylanases and β-xylosidases). This work will focus on the enzymes secreted by the filamentous ascomycete Talaromyces amestolkiae and on some of their biotechnological applications. Their excellent hydrolytic activity was demonstrated by the partial degradation of xylans to prebiotic oligosaccharides by the endoxylanase XynN, or by the saccharification of lignocellulosic wastes to monosaccharides (fermentable to ethanol) either by the whole secretomes or by isolated enzymes used as supplements of commercial cocktails. However, apart from their expected hydrolytic activity, some of the β-glycosidases produced by this strain catalyze the transfer of a sugar molecule to specific aglycons by transglycosylation. As the synthesis of customized glycoconjugates is a major goal for biocatalysis, mutant variants of the β-xyloxidase BxTW1 and the ß-glucosidases BGL-1 and BGL-2 were obtained by directed mutagenesis, substantially improving the regioselective production yields of bioactive glycosides since they showed reduced or null hydrolytic activity.
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Affiliation(s)
- Alicia Prieto
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain.
| | - Laura de Eugenio
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Juan A Méndez-Líter
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Manuel Nieto-Domínguez
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Carlos Murgiondo
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Jorge Barriuso
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Lara Bejarano-Muñoz
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - María Jesús Martínez
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain.
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133
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Hou J, Zhang S, Zhang X, Wang K, Zhang Q, Shi Y. Insights into ferulic acid detoxification mechanism by using a novel adsorbent, AEPA 250: The microinteraction of ferulic acid with AEPA 250 and Saccharomyces cerevisiae. J Hazard Mater 2021; 415:125685. [PMID: 34088183 DOI: 10.1016/j.jhazmat.2021.125685] [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: 01/04/2021] [Revised: 03/14/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
In this study, a novel adsorbent, Air Environment-prepared Adsorbent at 250 ℃ (AEPA250), was used to detoxify the main fermentation inhibitor (ferulic acid) present in the alkali-pretreated hydrolysate. AEPA250 reduced the effective concentration of ferulic acid by its adsorption, thereby decreasing the possible interaction of ferulic acid with Saccharomyces cerevisiae. The results indicated that AEPA250 functionalized with hydroxyl, carboxyl, and amino groups under acidic conditions with higher binding energies (-45.667, -27.046, and -11.008 kcal mol-1, respectively) and electronic cloud overlap and shorter bond distances (1.015, 1.010, and 2.094 Å, respectively) than those under the other pH conditions. These differences revealed that the electrostatic interaction dominated ferulic acid adsorption on AEPA250. Additionally, under acidic conditions and for carboxyl group functionalized AEPA250, energy band gap values of Eg1 were higher than those of Eg2, indicating that ferulic acid provided the π-electrons for the π-π electron donor-acceptor interactions with AEPA250. Furthermore, ferulic acid detoxification after AEPA250 adsorption caused the regulation of YDR316W-B and YPR137C-B genes of S. cerevisiae. These results might contribute to the development of other more efficient adsorbents and pretreatment methods and allow yeast engineering for improving the scale-up and self-sufficient production of bioethanol in the future.
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Affiliation(s)
- Jinju Hou
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, 200241 Shanghai, China
| | - Shudong Zhang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, 200241 Shanghai, China
| | - Xiaotong Zhang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, 200241 Shanghai, China
| | - Kainan Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, 200241 Shanghai, China
| | - Qiuzhuo Zhang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, 200241 Shanghai, China; Institute of Eco-Chongming (IEC), 3663 N. Zhongshan Rd., Shanghai 200062, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai 200062, China.
| | - Yuhan Shi
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, 200241 Shanghai, China
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Madadi M, Zhao K, Wang Y, Wang Y, Tang SW, Xia T, Jin N, Xu Z, Li G, Qi Z, Peng L, Xiong Z. Modified lignocellulose and rich starch for complete saccharification to maximize bioethanol in distinct polyploidy potato straw. Carbohydr Polym 2021; 265:118070. [PMID: 33966834 DOI: 10.1016/j.carbpol.2021.118070] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 07/14/2020] [Revised: 04/08/2021] [Accepted: 04/08/2021] [Indexed: 01/09/2023]
Abstract
Potato is a major food crop with enormous biomass straw, but lignocellulose recalcitrance causes a costly bioethanol conversion. Here, we selected the cytochimera (Cyt) potato samples showing significantly-modified lignocellulose and much increased soluble sugars and starch by 2-4 folds in mature straws. Under two pretreatments (8 min liquid hot water; 5% CaO) at minimized conditions, the potato Cyt straw showed complete enzymatic saccharification. Further performing yeast fermentation with all hexoses released from soluble sugars, starch and lignocellulose in the Cyt straw, this study achieved a maximum bioethanol yield of 24 % (% dry matter), being higher than those of other bioenergy crops as previously reported. Hence, this study has proposed a novel mechanism model on the reduction of major lignocellulose recalcitrance and regulation of carbon assimilation to achieve cost-effective bioethanol production under optimal pretreatments. This work also provides a sustainable strategy for utilization of potato straws with minimum waste release.
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Affiliation(s)
- Meysam Madadi
- Biomass & Bioenergy Research Center, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China; Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts & Science, Xiangyang, China.
| | - Kanglu Zhao
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, China.
| | - Youmei Wang
- Biomass & Bioenergy Research Center, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China; College of Life Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Yanting Wang
- Biomass & Bioenergy Research Center, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China; Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts & Science, Xiangyang, China.
| | - Shang-Wen Tang
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts & Science, Xiangyang, China.
| | - Tao Xia
- Biomass & Bioenergy Research Center, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China; College of Life Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Nengzhou Jin
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, China.
| | - Zhijun Xu
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, China.
| | - Guanhua Li
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, China.
| | - Zhi Qi
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, China.
| | - Liangcai Peng
- Biomass & Bioenergy Research Center, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China; Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts & Science, Xiangyang, China.
| | - Zhiyong Xiong
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, College of Life Science, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, China.
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Min KJ, Oh DY, Park KY. Pilot-scale cultivation of water-net in secondary effluent using an open pond raceway for nutrient removal and bioethanol production. Chemosphere 2021; 277:130129. [PMID: 33774229 DOI: 10.1016/j.chemosphere.2021.130129] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 01/04/2021] [Revised: 02/18/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Although microalgae are seen as a potential alternative source of energy and other materials currently sourced from petroleum, issues still remain with industrialization because of difficulties in developing commercially operational microalgal production systems. We set up a pilot-scale study that involved the simultaneous reuse of wastewater and production of algae under different light and harvesting conditions. We cultivated Hydrodictyon reticulatum (H. reticulatum), a type of water-net algae, using secondary effluent from a wastewater treatment plant in a raceway open pond combined with an underwater light device. Experimental results showed that the underwater light device maintained some level of underwater light throughout the year. Photoinhibition of algal growth only occurred when the sunlight exceeded 1270 μmol m-2 s-1. During the non-harvest process, the maximum algal concentration was 1700 mg L-1 at 20 days after the experiment began, the maximum specific growth rate was 0.18 d-1 and the maximum productivity was 21.3 g m-2 d-1. Conversely, periodic harvesting decreased the concentration of nutrients in the effluent more as the days of cultivation increased, but the productivity of algae also decreased to 11.7 g m-2 d-1. The maximum yield of bioethanol using three kinds of fermentation strains was 93.5% and, thus, the commercial value of H. reticulatum as a raw material for energy production was excellent.
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Affiliation(s)
- Kyung Jin Min
- Department of Civil and Environmental Engineering, Konkuk University, Neungdong-ro 120, Gwangjin-Gu, Seoul, Republic of Korea.
| | - Doo Young Oh
- Department of Civil and Environmental Engineering, Konkuk University, Neungdong-ro 120, Gwangjin-Gu, Seoul, Republic of Korea.
| | - Ki Young Park
- Department of Civil and Environmental Engineering, Konkuk University, Neungdong-ro 120, Gwangjin-Gu, Seoul, Republic of Korea.
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Sharma S, Nargotra P, Sharma V, Bangotra R, Kaur M, Kapoor N, Paul S, Bajaj BK. Nanobiocatalysts for efficacious bioconversion of ionic liquid pretreated sugarcane tops biomass to biofuel. Bioresour Technol 2021; 333:125191. [PMID: 33951579 DOI: 10.1016/j.biortech.2021.125191] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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: 03/06/2021] [Revised: 04/10/2021] [Accepted: 04/14/2021] [Indexed: 06/12/2023]
Abstract
This work aimed to study the hydrolysis of ionic liquid (IL) pretreated sugarcane tops (SCT) biomass with in-house developed IL-stable enzyme preparation, from a fungal isolate Aspergillus flavus PN3. Maximum reducing sugar yield (181.18 mg/g biomass) was obtained from tris (2-hydroxyethyl) methylammonium-methylsulfate ([TMA]MeSO4) pretreated biomass. Pretreatment parameters were optimized to attain enhanced sugar yield (1.57-fold). Functional mechanism of IL mediated pretreatment of SCT biomass was elucidated by SEM, XRD, FTIR and 1H NMR studies. Furthermore, nanobiocatalysts prepared by immobilization of enzyme preparation by covalent coupling on magnetic nanoparticles functionalized with amino-propyl triethoxysilane, were assessed for their hydrolytic efficacy and reusability. Nanobiocatalysts were examined by SEM and FTIR analysis for substantiation of immobilization. This is the first ever report of application of magnetic nanobiocatalysts for saccharification of IL-pretreated sugarcane tops biomass.
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Affiliation(s)
- Surbhi Sharma
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Parushi Nargotra
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Vishal Sharma
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Ridhika Bangotra
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Manpreet Kaur
- Department of Chemistry, University of Jammu, Jammu 180006, India
| | - Nisha Kapoor
- School of Biotechnology, University of Jammu, Jammu 180006, India
| | - Satya Paul
- Department of Chemistry, University of Jammu, Jammu 180006, India
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Cao W, Zhao W, Yang B, Wang X, Shen Y, Wei T, Qin W, Li Z, Bao X. Proteomic analysis revealed the roles of YRR1 deletion in enhancing the vanillin resistance of Saccharomyces cerevisiae. Microb Cell Fact 2021; 20:142. [PMID: 34301255 PMCID: PMC8305865 DOI: 10.1186/s12934-021-01633-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/11/2021] [Accepted: 07/15/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Vanillin is one of the important phenolic inhibitors in Saccharomyces cerevisiae for bioconversion of lignocellulosic materials and has been reported to inhibit the translation process in cells. In our previous studies, it was confirmed that the deletion of the transcription factor gene YRR1 enhanced vanillin resistance by promoting some translation-related processes at the transcription level. In this work, we investigated the effects of proteomic changes upon induction of vanillin stress and deletion of YRR1 to provide unique perspectives from a transcriptome analysis for comprehending the mechanisms of YRR1 deletion in the protective response of yeast to vanillin. RESULTS In wild-type cells, vanillin reduced two dozens of ribosomal proteins contents while upregulated proteins involved in glycolysis, oxidative phosphorylation, and the pentose phosphate pathway in cells. The ratios of NADPH/NADP+ and NADH/NAD+ were increased when cells responded to vanillin stress. The differentially expressed proteins perturbed by YRR1 deletion were much more abundant than and showed no overlaps with transcriptome changes, indicating that Yrr1 affects the synthesis of certain proteins. Forty-eight of 112 upregulated proteins were involved in the stress response, translational and transcriptional regulation. YRR1 deletion increased the expression of HAA1-encoding transcriptional activator, TMA17-encoding proteasome assembly chaperone and MBF1-encoding coactivator at the protein level, as confirmed by ELISA. Cultivation data showed that the overexpression of HAA1 and TMA17 enhanced resistance to vanillin in S. cerevisiae. CONCLUSIONS Cells conserve energy by decreasing the content of ribosomal proteins, producing more energy and NAD(P)H for survival in response to vanillin stress. Yrr1 improved vanillin resistance by increasing the protein quantities of Haa1, Tma17 and Mbf1. These results showed the response of S. cerevisiae to vanillin and how YRR1 deletion increases vanillin resistance at the protein level. These findings may advance our knowledge of how YRR1 deletion protects yeast from vanillin stress and offer novel targets for genetic engineering of designing inhibitor-resistant ethanologenic yeast strains.
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Affiliation(s)
- Wenyan Cao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Bioengineering, Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan, 250353, China
| | - Weiquan Zhao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Bioengineering, Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan, 250353, China
| | - Bolun Yang
- State Key Laboratory of Biobased Material and Green Papermaking, School of Bioengineering, Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan, 250353, China
| | - Xinning Wang
- State Key Laboratory of Biobased Material and Green Papermaking, School of Bioengineering, Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan, 250353, China.
| | - Yu Shen
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Binhai Road 72, Qingdao, 266237, China
| | - Tiandi Wei
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Binhai Road 72, Qingdao, 266237, China
| | - Wensheng Qin
- Department of Biology, Lakehead University, 955 Oliver Rd, Thunder Bay, ON, P7B 5E1, Canada
| | - Zailu Li
- State Key Laboratory of Biobased Material and Green Papermaking, School of Bioengineering, Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan, 250353, China
| | - Xiaoming Bao
- State Key Laboratory of Biobased Material and Green Papermaking, School of Bioengineering, Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), 3501 Daxue Road, Jinan, 250353, China
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138
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Baena LM, Vásquez FA, Calderón JA. Corrosion assessment of metals in bioethanol-gasoline blends using electrochemical impedance spectroscopy. Heliyon 2021; 7:e07585. [PMID: 34381887 PMCID: PMC8332664 DOI: 10.1016/j.heliyon.2021.e07585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 02/03/2021] [Revised: 05/31/2021] [Accepted: 07/12/2021] [Indexed: 11/17/2022] Open
Abstract
Due to the increased use of environmentally friendly fuels, it becomes imperative to evaluate the impact of biofuels on the performance of materials used in auto parts. The corrosive effects of biofuels are important in terms of durability of auto-parts since there is an evidence of the increasing deterioration in automobile parts with the long-term use of biofuels. In this research, the behavior of metals, used in the manufacturing of auto parts, in pure bioethanol (E100) and bioethanol-gasoline blends with 30% (E30), 50% (E50), and 85% (E85) of ethanol content were evaluated. Electrochemical impedance Spectroscopy (EIS) curves were done under static conditions at 45 °C. The metallic materials evaluated were stainless steel, tin, carbon steel and copper. The EIS diagrams showed two capacitive arcs for all materials. The high frequency arc was related to the dielectric response of the fuel blends, while the second one shows the characteristics and activity of the metal/fuel interface. According to the transfer resistance (Rt) obtained from the second arc of the EIS measurements, copper and carbon steel exhibited corrosion susceptibility in all fuel blends, while stainless steel and tin showed good anticorrosion behavior by showing high Rt values. The highest charge transfer resistance was showed by tin, followed by stainless steel, carbon steel and copper. Except for carbon steel and copper, the other set samples were compatible with the evaluated blends.
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Affiliation(s)
- Libia M Baena
- Grupo de Calidad, Metrología y Producción, Instituto Tecnológico Metropolitano ITM, Medellín, Colombia
| | - Ferley A Vásquez
- Centro de Investigación, Innovación y Desarrollo de Materiales-CIDEMAT, Universidad de Antioquia, Medellín, Colombia
| | - Jorge A Calderón
- Centro de Investigación, Innovación y Desarrollo de Materiales-CIDEMAT, Universidad de Antioquia, Medellín, Colombia
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139
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Wang S, Tian R, Liu B, Wang H, Liu J, Li C, Li M, Evivie SE, Li B. Effects of carbon concentration, oxygen, and controlled pH on the engineering strain Lactiplantibacillus casei E1 in the production of bioethanol from sugarcane molasses. AMB Express 2021; 11:95. [PMID: 34176008 PMCID: PMC8236424 DOI: 10.1186/s13568-021-01257-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 06/16/2021] [Indexed: 01/28/2023] Open
Abstract
Sugarcane molasses are considered a potential source for bioethanol's commercial production because of its availability and low market price. It contains high concentrations of fermentable sugars that can be directly metabolized by microbial fermentation. Heterofermentative lactic acid bacteria, especially Lactiplantibacillus casei, have a high potential to be a biocatalyst in ethanol production that they are characterized by strong abilities of carbohydrate metabolism, ethanol synthesis, and high alcohol tolerance. This study aimed to evaluate the feasibility of producing ethanol by Lactiplantibacillus casei used the ethanologen engineering strain L. casei E1 as a starter culture and cane molasses as substrate medium. The effects of environmental factors on the metabolism of L. casei E1 were analyzed by high-performance liquid chromatography (HPLC) system, and the gene expression of key enzymes in carbon source metabolism was detected using quantitative real-time PCR (RT-qPCR). Results showed that the strain could grow well, ferment sugar quickly in cane molasses. By fermenting this bacterium anaerobically at 37 °C for 36 h incubation in 5 °BX molasses when the fermenter's pH was controlled at 6.0, ethanol yield reached 13.77 g/L, and carbohydrate utilization percentage was 78.60%. RT-qPCR results verified the strain preferentially ferment glucose and fructose of molasses to ethanol at the molecular level. In addition, the metabolism of sugars, especially fructose, would be inhibited by elevating acidity. Our findings support the theoretical basis for exploring Lactic acid bacteria as a starter culture for converting sugarcane molasses into ethanol.
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Affiliation(s)
- Song Wang
- Food College, Northeast Agricultural University, Harbin, 150030, China
- Shandong Yuwang Ecological Food Industry Co., Ltd, Dezhou, 251200, Shandong, China
| | - Ran Tian
- Food College, Northeast Agricultural University, Harbin, 150030, China
| | - Buwei Liu
- Food College, Northeast Agricultural University, Harbin, 150030, China
| | - Hongcai Wang
- Shandong Yuwang Ecological Food Industry Co., Ltd, Dezhou, 251200, Shandong, China
| | - Jun Liu
- Shandong Yuwang Ecological Food Industry Co., Ltd, Dezhou, 251200, Shandong, China
| | - Chenghui Li
- Shandong Yuwang Ecological Food Industry Co., Ltd, Dezhou, 251200, Shandong, China
| | - Mingyue Li
- Shandong Yuwang Ecological Food Industry Co., Ltd, Dezhou, 251200, Shandong, China
| | - Smith Etareri Evivie
- Food College, Northeast Agricultural University, Harbin, 150030, China
- Department of Animal Science, Faculty of Agriculture, University of Benin, Benin City, 300001, Nigeria
- Department of Food Science and Human Nutrition, Faculty of Agriculture, University of Benin, Benin City, 300001, Nigeria
| | - Bailiang Li
- Food College, Northeast Agricultural University, Harbin, 150030, China.
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140
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Liu S, Liu H, Shen C, Fang W, Xiao Y, Fang Z. Comparison of performances of different fungal laccases in delignification and detoxification of alkali-pretreated corncob for bioethanol production. J Ind Microbiol Biotechnol 2021; 48:6132310. [PMID: 33693714 PMCID: PMC9113415 DOI: 10.1093/jimb/kuab013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 10/03/2020] [Accepted: 02/08/2021] [Indexed: 11/13/2022]
Abstract
The performance of the alkaline fungal laccase PIE5 (pH 8.5) in the
delignification and detoxification of alkali-pretreated corncob to produce
bioethanol was evaluated and compared with that of the neutral counterpart
(rLcc9, 6.5), with the acidic laccase rLacA (4.0) was used as an independent
control. Treatment with the three laccases facilitated bioethanol production
compared with their respective controls. The lignin contents of
alkali-pretreated corncob reduced from 4.06%, 5.06%, and
7.80% to 3.44%, 3.95%, and 5.03%, after PIE5, rLcc9,
and rLacA treatment, respectively. However, the performances of the laccases
were in the order rLacA > rLcc9 > PIE5
in terms of decreasing total phenol concentration (0.18, 0.36, and
0.67 g/l), boosting ethanol concentration (8.02, 7.51, and
7.31 g/l), and volumetric ethanol productivity (1.34, 0.94, and
0.91 g/l hr), and shortening overall fermentation time. Our
results would inform future attempts to improve laccases for ethanol production.
Furthermore, based on our data and the fact that additional procedures, such as
pH adjustment, are needed during neutral/alkaline fungal laccase treatment, we
suggest acidic fungal laccases may be a better choice than neutral/alkaline
fungal laccases in bioethanol production.
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Affiliation(s)
- Shenglong Liu
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China.,Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China.,Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, Hefei, Anhui 230601, China
| | - Huan Liu
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China.,Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China.,Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, Hefei, Anhui 230601, China
| | - Chen Shen
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China.,Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China.,Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, Hefei, Anhui 230601, China
| | - Wei Fang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China.,Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China.,Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, Hefei, Anhui 230601, China
| | - Yazhong Xiao
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China.,Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China.,Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, Hefei, Anhui 230601, China
| | - Zemin Fang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, China.,Anhui Key Laboratory of Modern Biomanufacturing, Hefei, Anhui 230601, China.,Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis, Hefei, Anhui 230601, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China
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Chilakamarry CR, Sakinah AMM, Zularisam AW, Pandey A. Glycerol waste to value added products and its potential applications. Syst Microbiol Biomanuf 2021; 1:378-396. [PMID: 38624889 PMCID: PMC8182736 DOI: 10.1007/s43393-021-00036-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/27/2021] [Accepted: 06/01/2021] [Indexed: 02/06/2023]
Abstract
The rapid industrial and economic development runs on fossil fuel and other energy sources. Limited oil reserves, environmental issues, and high transportation costs lead towards carbon unbiased renewable and sustainable fuel. Compared to other carbon-based fuels, biodiesel is attracted worldwide as a biofuel for the reduction of global dependence on fossil fuels and the greenhouse effect. During biodiesel production, approximately 10% of glycerol is formed in the transesterification process in a biodiesel plant. The ditching of crude glycerol is important as it contains salt, free fatty acids, and methanol that cause contamination of soil and creates environmental challenges for researchers. However, the excessive cost of crude glycerol refining and market capacity encourage the biodiesel industries for developing a new idea for utilising and produced extra sources of income and treat biodiesel waste. This review focuses on the significance of crude glycerol in the value-added utilisation and conversion to bioethanol by a fermentation process and describes the opportunities of glycerol in various applications. Graphic abstract
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Affiliation(s)
- Chaitanya Reddy Chilakamarry
- Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, Gambang, Kuantan , Malaysia 26300
| | - A. M. Mimi Sakinah
- Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, Gambang, Kuantan , Malaysia 26300
| | - A. W. Zularisam
- Faculty of Civil Engineering Technology , Universiti Malaysia Pahang, Gambang, Kuantan , Malaysia 26300
| | - Ashok Pandey
- Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001 India
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Sanchez N, Ruiz R, Rödl A, Cobo M. Life cycle inventory data for power production from sugarcane press-mud. Data Brief 2021; 37:107194. [PMID: 34150964 PMCID: PMC8193086 DOI: 10.1016/j.dib.2021.107194] [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: 05/05/2021] [Revised: 05/20/2021] [Accepted: 05/31/2021] [Indexed: 11/30/2022] Open
Abstract
This data article is associated with the research article “Technical and environmental analysis on the power production from residual biomass using hydrogen as energy vector”. This paper shows the procedure to calculate the Life Cycle Inventory (LCI) of the foreground system to perform the Life Cycle Assessment (LCA) of the power production from sugarcane press-mud. Said process encompasses four main stages: i) bioethanol production; ii) bioethanol purification; iii) syngas production and purification; and iv) power production. Additionally, other processes such as biomethane production and manufacturing of catalyst were included. Foreground data related to bioethanol production was gathered from experimental procedures at lab-scale. While foreground data, concerning the other processes such as bioethanol purification, syngas production and purification, power production, and biomethane production, was built by using material and energy flows obtained from Aspen Plus®. Lastly, LCI of the catalyst manufacturing was built based on literature review and the approach stated by Ecoinvent. All the inventories are meaningful to carry out future environmental assessments involving sustainable energy systems based on bioethanol, biomethane, or hydrogen.
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Affiliation(s)
- Nestor Sanchez
- Energy, Materials, and Environmental Laboratory. Department of Chemical and Biochemical Processes. Universidad de La Sabana. Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá, Colombia
| | - Ruth Ruiz
- Agroindustrial Processes Group, Faculty of Engineering, Universidad de La Sabana. Campus Universitario Puente Del Común, Km. 7 Autopista Norte, Bogota, Colombia
| | - Anne Rödl
- Hamburg University of Technology (TUHH), Institute of Environmental Technology and Energy Economics (IUE), Eissendorfer Straße 40, D-21073, Hamburg, Germany
| | - Martha Cobo
- Energy, Materials, and Environmental Laboratory. Department of Chemical and Biochemical Processes. Universidad de La Sabana. Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá, Colombia
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143
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Abstract
Synergistic saccharification ability of hemicellulases (endo-xylanase and β-xylosidase) was evaluated in this study for the bioethanol production from plant biomass. Endo-xylanase and β-xylosidase genes from Bacillus licheniformis were cloned and expressed in Escherichia coli BL21 (DE3). Maximum endo-xylanase production was obtained at 200 rpm agitation speed, air supply rate 2.0 vvm, 70% volume of the medium, 20% dissolved oxygen level and with 3% inoculum size. The optimal conditions for maximum production of recombinant β-xylosidase enzyme at pilot scale were 200 rpm agitation speed, 25% dissolved oxygen level, 2.5 vvm aeration rate, 70% volume of the medium with 2% inoculum size. Furthermore, the saccharification potential of these recombinant enzymes was checked for the production of xylose sugar by bioconversion of plant biomass by optimizing individually as well as synergistically by optimizing various parameters. Maximum saccharification (93%) of plant biomass was observed when both enzymes were used at a time with 8% sugarcane bagasse as a substrate and 200 units of each enzyme after incubation of 6 hr at 50 °C and 120 rpm. The results obtained in this study suggested these recombinant hemicellulases as potential candidates for the conversion of complex agricultural residues into simple sugars for ultimate use in the biofuel industry.
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Affiliation(s)
- Asma Zafar
- Faculty of Life Sciences, University of Central Punjab, Lahore, Pakistan
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144
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Ramaraj R, Bhuyar P, Intarod K, Sameechaem N, Unpaprom Y. Stimulation of natural enzymes for germination of mimosa weed seeds to enhanced bioethanol production. 3 Biotech 2021; 11:307. [PMID: 34194899 DOI: 10.1007/s13205-021-02859-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 04/04/2021] [Accepted: 05/24/2021] [Indexed: 11/30/2022] Open
Abstract
Depleting fossil fuels target plant weeds which have the potential to be converted into efficient biofuels. In this study, mimosa seeds were utilized as a substrate for bioethanol production. This investigation was divided into three parts: breaking dormancy of seeds, mimosa seeds germination, and bioethanol production from mimosa seeds. Seed dormancy breaking was initiated by seeds soaked in hot distilled water to analyze the sugar quantity. Sugar content was measured relevance with root length results. According to results, root length obtained revealed that at 0.5-1.0 cm for root size has the most sugar availability. It was revealed that the total sugar 548.21 g/L and reducing sugar has a concentration of 248.67 g/L. Therefore, the broken dormancy of seeds using hot water at 95 °C for 10 min with a root length of 0.5-1 cm was used for ethanol fermentation. Ethanol fermentation was done by free yeast cell and immobilized yeast by injecting yeast directly. The ethanol yield was measured on the 3rd day of every fermentation. Results showed that the free cell yeast during the 1st day of fermentation afforded an ethanol production of 57.574 g/L, while the yield for immobilized yeast was 60.714 g/L. Consequently, the ethanol yield on the 2nd day of fermentation from the directly injected immobilized yeast was 60.088 g/L. Results revealed that the immobilization of yeast cells in fermentation provided a higher probability for bioethanol yield and could be utilized as a baseline for future bioethanol production. Stimulation of natural enzymes by germination of seeds for enhanced bioethanol production will be a novel approach towards next-generation biofuels.
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Affiliation(s)
- Rameshprabu Ramaraj
- School of Renewable Energy, Maejo University, Chiang Mai, 50290 Thailand
- Sustainable Resources and Sustainable Engineering Research Lab, Maejo University, Chiang Mai, 50290 Thailand
| | - Prakash Bhuyar
- School of Renewable Energy, Maejo University, Chiang Mai, 50290 Thailand
- Sustainable Resources and Sustainable Engineering Research Lab, Maejo University, Chiang Mai, 50290 Thailand
| | - Kodchapan Intarod
- School of Renewable Energy, Maejo University, Chiang Mai, 50290 Thailand
- Sustainable Resources and Sustainable Engineering Research Lab, Maejo University, Chiang Mai, 50290 Thailand
| | - Netnapa Sameechaem
- Program in Biotechnology, Faculty of Science, Maejo University, Chiang Mai, 50290 Thailand
| | - Yuwalee Unpaprom
- Sustainable Resources and Sustainable Engineering Research Lab, Maejo University, Chiang Mai, 50290 Thailand
- Program in Biotechnology, Faculty of Science, Maejo University, Chiang Mai, 50290 Thailand
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145
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Chen J, Wang X, Zhang B, Yang Y, Song Y, Zhang F, Liu B, Zhou Y, Yi Y, Shan Y, Lü X. Integrating enzymatic hydrolysis into subcritical water pretreatment optimization for bioethanol production from wheat straw. Sci Total Environ 2021; 770:145321. [PMID: 33515886 DOI: 10.1016/j.scitotenv.2021.145321] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 11/27/2020] [Revised: 01/14/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
The conversion of lignocellulosic biomass to bioethanol is a potential approach to alleviate the energy crisis and environmental deterioration. To improve the conversion efficiency of bioethanol from wheat straw (WS), the optimization of subcritical water pretreatment and high solid hydrolysis were investigated in this study. Response surface methodology (RSM) accompanied with glucose concentration after enzymatic hydrolysis as a more reasonable response value was applied for the pretreatment optimization, and the optimum conditions were obtained as 220.51 °C of extraction temperature, 22.01 min of extraction time and 2.50% (w/v) of substrate loading. After pretreatment, the hemicellulose decreased by 18.37%, and the cellulose and lignin increased by 25.92% and 8.81%, respectively, which were consistent with the destroyed microstructure and raised crystallinity. The high efficiency of separate hydrolysis and fermentation (SHF) was verified by five commercial cellulases, and yields of hydrolysis and fermentation were 77.85-89.59% and 93.34-96.18%, respectively. Based on the high solid (15%) hydrolysis and fermentation, the ethanol concentration was significantly improved to 37.00 g/L. Interestingly, 64.47% of lignin was accumulated in the solid residue after enzymatic hydrolysis and it did not affect the efficiency of SHF, which further suggested that subcritical water mainly affected the structure of WS rather than the removal of lignin. Therefore, subcritical water pretreatment combined with high solid hydrolysis is a more effective solution for bioethanol conversion, which is also a promising strategy to utilize all components of lignocellulosic biomass.
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Affiliation(s)
- Jiaxin Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xin Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Biying Zhang
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yifan Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yangbo Song
- College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Fan Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Bianfang Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yuan Zhou
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yanglei Yi
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Yuanyuan Shan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xin Lü
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China.
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146
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Singh B, Bala A, Anu, Alokika, Kumar V, Singh D. Biochemical properties of cellulolytic and xylanolytic enzymes from Sporotrichum thermophile and their utility in bioethanol production using rice straw. Prep Biochem Biotechnol 2021; 52:197-209. [PMID: 34010094 DOI: 10.1080/10826068.2021.1925911] [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] [Indexed: 10/21/2022]
Abstract
Production of cellulolytic and xylanolytic enzymes by Sporotrichum thermophile was enhanced using response surface methodology in solid-state fermentation (SSF) using wheat straw and cotton oil cake. Cellulolytic and xylanolytic enzymes were partially purified by ammonium sulfate precipitation followed by ion exchange and gel filtration chromatographic techniques. Xylanase of S. thermophile is neutral xylanase displaying optimal activity at 60 °C with Km and Vmax values of 0.2 mg/mL and 238.05 µmole/min, respectively. All cellulases produced by the thermophilic mold showed optimal activity at pH 5.0 and 60 °C with Km values of 0.312 mg/mL, 0.113 mg/mL, and 0.285 mM for carboxymethyl cellulase (CMCase), filter paper cellulase (FPase), and β-glucosidase, respectively and while Vmax values were 181.81, 138.88, and 66.67 µmole/min, respectively. The presence of various metal ions (Ca2+ and Co2+), chemical reagent (glutaraldehyde), and surfactants (Tween 80 and Triton X-100) significantly improved the activities of all enzymes. All the enzymes showed high storage stability under low temperature (-20 and 4 °C) conditions. Cellulolytic and xylanolytic enzymes resulted in enhanced liberation of reducing sugars (356.34 mg/g) by hydrolyzing both cellulosic and hemicellulosic fractions of ammonia-pretreated rice straw as compared to other pretreatment methods used in the study. Fermentation of enzymatic hydrolysate resulted in the formation of 28.88 and 27.18 g/L of bioethanol in separate hydrolysis and fermentation (SHF) process by Saccharomyces cerevisiae and Pichia stipitis, respectively. Therefore, cellulolytic and xylanolytic enzymes of S. thermophile exhibited ideal properties of biocatalysts useful in the saccharification of cellulosic and hemicellulosic fractions of rice straw for the production of bioethanol.
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Affiliation(s)
- Bijender Singh
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, India.,Department of Biotechnology, Central University of Haryana, Mahendergarh, India
| | - Anju Bala
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Anu
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Alokika
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Vinod Kumar
- Department of Chemistry, Central University of Haryana, Mahendergarh, India
| | - Davender Singh
- Department of Physics, RPS Degree College, Mahendergarh, India
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147
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Solieri L. The revenge of Zygosaccharomyces yeasts in food biotechnology and applied microbiology. World J Microbiol Biotechnol 2021; 37:96. [PMID: 33969449 DOI: 10.1007/s11274-021-03066-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 03/05/2021] [Accepted: 04/28/2021] [Indexed: 12/01/2022]
Abstract
Non-conventional yeasts refer to a huge and still poorly explored group of species alternative to the well-known model organism Saccharomyces cerevisiae. Among them, Zygosaccharomyces rouxii and the sister species Zygosaccharomyces bailii are infamous for spoiling food and beverages even in presence of several food preservatives. On the other hand, their capability to cope with a wide range of process conditions makes these yeasts very attractive factories (the so-called "ZygoFactories") for bio-converting substrates poorly permissive for the growth of other species. In balsamic vinegar Z. rouxii is the main yeast responsible for converting highly concentrated sugars into ethanol, with a preference for fructose over glucose (a trait called fructophily). Z. rouxii has also attracted much attention for the ability to release important flavor compounds, such as fusel alcohols and the derivatives of 4-hydroxyfuranone, which markedly contribute to fragrant and smoky aroma in soy sauce. While Z. rouxii was successfully proposed in brewing for producing low ethanol beer, Z. bailii is promising for lactic acid and bioethanol production. Recently, several research efforts exploited omics tools to pinpoint the genetic bases of distinctive traits in "ZygoFactories", like fructophily, tolerance to high concentrations of sugars, lactic acid and salt. Here, I provided an overview of Zygosaccharomyces industrially relevant phenotypes and summarized the most recent findings in disclosing their genetic bases. I suggest that the increasing number of genomes available for Z. rouxii and other Zygosaccharomyces relatives, combined with recently developed genetic engineering toolkits, will boost the applications of these yeasts in biotechnology and applied microbiology.
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Affiliation(s)
- L Solieri
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Amendola 2, 42122, Reggio Emilia, Italy.
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148
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Wayllace NM, Hedín N, Busi MV, Gomez-Casati DF. Characterization of SdGA, a cold-adapted glucoamylase from Saccharophagus degradans. ACTA ACUST UNITED AC 2021; 30:e00625. [PMID: 34041001 DOI: 10.1016/j.btre.2021.e00625] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 04/24/2021] [Accepted: 04/28/2021] [Indexed: 11/24/2022]
Abstract
We investigated the structural and functional properties of SdGA, a glucoamylase (GA) from Saccharophagus degradans, a marine bacterium which degrades different complex polysaccharides at high rate. SdGA is composed mainly by a N-terminal GH15_N domain linked to a C-terminal catalytic domain (CD) found in the GH15 family of glycosylhydrolases with an overall structure similar to other bacterial GAs. The protein was expressed in Escherichia coli cells, purified and its biochemical properties were investigated. Although SdGA has a maximum activity at 39 °C and pH 6.0, it also shows high activity in a wide range, from low to mild temperatures, like cold-adapted enzymes. Furthermore, SdGA has a higher content of flexible residues and a larger CD due to various amino acid insertions compared to other thermostable GAs. We propose that this novel SdGA, is a cold-adapted enzyme that might be suitable for use in different industrial processes that require enzymes which act at low or medium temperatures.
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149
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Vedovatto F, Bonatto C, Bazoti SF, Venturin B, Alves SL, Kunz A, Steinmetz RLR, Treichel H, Mazutti MA, Zabot GL, Tres MV. Production of biofuels from soybean straw and hull hydrolysates obtained by subcritical water hydrolysis. Bioresour Technol 2021; 328:124837. [PMID: 33607449 DOI: 10.1016/j.biortech.2021.124837] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 12/29/2020] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
The objective of this study was to evaluate the ethanol production by Wickerhamomyces sp. using soybean straw and hull hydrolysates obtained by subcritical water hydrolysis and, afterward, the biogas production using the fermented hydrolysates. Ethanol was produced using the straw and hull hydrolysates diluted and supplement with glucose, reaching 5.57 ± 0.01 g/L and 6.11 ± 0.11 g/L, respectively. The fermentation in a bioreactor with changing the pH to 7.0 allowed achieving maximum ethanol production of 4.03 and 3.60 g/L for straw and hull hydrolysates at 24 h, respectively. The biogas productions obtained for the fermented hydrolysates of straw with and without changing the pH were 739 ± 37 and 652 ± 34 NmL/gVSad, respectively. The fermented hydrolysate of hull without changing the pH presented 620 ± 26 NmL/gVSad. The soybean residues produced biofuels, indicating these residues show potential as raw material for renewable energy production.
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Affiliation(s)
- Felipe Vedovatto
- Department of Agricultural Engineering, Federal University of Santa Maria, 1000, Roraima av., Santa Maria 97105-900, Brazil; Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro av., Cachoeira do Sul 96506-322, Brazil
| | - Charline Bonatto
- Laboratory of Microbiology and Bioprocess, Federal University of Fronteira Sul, 200, ERS 135 - km 72, Erechim 99700-970, Brazil; Department of Chemical and Food Engineering, Federal University of Santa Catarina, Trindade, Florianópolis 88040-900, Brazil
| | - Suzana F Bazoti
- Laboratory of Microbiology and Bioprocess, Federal University of Fronteira Sul, 200, ERS 135 - km 72, Erechim 99700-970, Brazil
| | - Bruno Venturin
- Western Paraná State University, R. Universitária, Cascavel 85819-110, Brazil
| | - Sérgio L Alves
- Laboratory of Biochemistry and Genetics, Federal University of Fronteira Sul, Rodovia SC 484 - Km 02, Chapecó, 89815-899, Brazil
| | - Airton Kunz
- Laboratory of Microbiology and Bioprocess, Federal University of Fronteira Sul, 200, ERS 135 - km 72, Erechim 99700-970, Brazil; Western Paraná State University, R. Universitária, Cascavel 85819-110, Brazil; Embrapa Suínos e Aves, BR 153 - Km 110, Concórdia 89710-028, Brazil
| | | | - Helen Treichel
- Laboratory of Microbiology and Bioprocess, Federal University of Fronteira Sul, 200, ERS 135 - km 72, Erechim 99700-970, Brazil
| | - Marcio A Mazutti
- Department of Agricultural Engineering, Federal University of Santa Maria, 1000, Roraima av., Santa Maria 97105-900, Brazil; Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima av., Santa Maria 97105-900, Brazil
| | - Giovani L Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro av., Cachoeira do Sul 96506-322, Brazil
| | - Marcus V Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro av., Cachoeira do Sul 96506-322, Brazil.
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150
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Ntaikou I, Siankevich S, Lyberatos G. Effect of thermo-chemical pretreatment on the saccharification and enzymatic digestibility of olive mill stones and their bioconversion towards alcohols. Environ Sci Pollut Res Int 2021; 28:24570-24579. [PMID: 32557020 DOI: 10.1007/s11356-020-09625-z] [Citation(s) in RCA: 3] [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: 12/30/2019] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
The present study investigated the effect of thermo-chemical pretreatment on the enhancement of enzymatic digestibility of olive mill stones (OMS), as well as its possible valorisation via bioconversion of the generated free sugars to alcohols. Specifically, the influence of parameters such as reaction time, temperature, type and concentration of dilute acids and/or bases, was assessed during the thermo-chemical pretreatment. The hydrolysates and the solids remaining after pretreatment, as well as the whole pretreated slurries, were further evaluated as potential substrates for the simultaneous production of ethanol and xylitol via fermentation with the yeast Pachysolen tannophilus. The digestibility and overall saccharification of OMS were considerably enhanced in all cases, with the maximum enzymatic digestibility observed for dilute sodium hydroxide (almost 4-fold) which also yielded the highest total saccharification yield (91% of the total OMS carbohydrates). Ethanol and xylitol yields from the untreated OMS were 28 g/kg OMS and 25 g/kg OMS, respectively, and were both significantly enhanced by pretreatment. The highest ethanol yield was 79 g/kg OMS and was achieved by the alkali pretreatment and separate fermentation of hydrolysates and solids, whereas the highest xylitol yield was 49 g/kg OMS and was obtained by pretreatment with sulphuric acid and separate fermentation of hydrolysates and solids.
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Affiliation(s)
- Ioanna Ntaikou
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences, Stadiou 10, Platani, GR 50600, Patras, Greece.
| | - Sviatlana Siankevich
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences, Stadiou 10, Platani, GR 50600, Patras, Greece
- Embion Technologies SA, Chemin de la Dent-d'Oche 1 A, Ecublens VD, 1024, Vaud, Switzerland
| | - Gerasimos Lyberatos
- Foundation for Research and Technology, Institute of Chemical Engineering Sciences, Stadiou 10, Platani, GR 50600, Patras, Greece
- School of Chemical Engineering Sciences, National Technical University of Athens, GR 15780, Athens, Greece
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