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Moenaert A, Bjornsdottir B, Haraldsson EB, Allahgholi L, Zieri A, Zangl I, Sigurðardóttir S, Örlygsson J, Nordberg Karlsson E, Friðjónsson ÓH, Hreggviðsson GÓ. Metabolic engineering of Thermoanaerobacterium AK17 for increased ethanol production in seaweed hydrolysate. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:135. [PMID: 37697400 PMCID: PMC10496261 DOI: 10.1186/s13068-023-02388-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/01/2023] [Indexed: 09/13/2023]
Abstract
Sustainably produced renewable biomass has the potential to replace fossil-based feedstocks, for generation of biobased fuels and chemicals of industrial interest, in biorefineries. In this context, seaweeds contain a large fraction of carbohydrates that are a promising source for enzymatic and/or microbial biorefinery conversions. The thermoanaerobe Thermoanaerobacterium AK17 is a versatile fermentative bacterium producing ethanol, acetate and lactate from various sugars. In this study, strain AK17 was engineered for more efficient production of ethanol by knocking out the lactate and acetate side-product pathways. This was successfully achieved, but the strain reverted to acetate production by recruiting enzymes from the butyrate pathway. Subsequently this pathway was knocked out and the resultant strain AK17_M6 could produce ethanol close to the maximum theoretical yield (90%), leading to a 1.5-fold increase in production compared to the wild-type strain. Strain AK17 was also shown to successfully ferment brown seaweed hydrolysate from Laminaria digitata to ethanol in a comparatively high yield of 0.45 g/g substrate, with the primary carbon sources for the fermentations being mannitol, laminarin-derived glucose and short laminari-oligosaccharides. As strain AK17 was successfully engineered and has a wide carbohydrate utilization range that includes mannitol from brown seaweed, as well as hexoses and pentoses found in both seaweeds and lignocellulose, the new strain AK17_M6 obtained in this study is an interesting candidate for production of ethanol from both second and third generations biomass.
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Affiliation(s)
- Antoine Moenaert
- Department of Biotechnology, Matís Ohf, Reykjavík, Iceland.
- Faculty of Life and Environmental Sciences, University of Iceland, Reykjavík, Iceland.
| | | | - Einar Baldvin Haraldsson
- Department of Biotechnology, Matís Ohf, Reykjavík, Iceland
- Faculty of Life and Environmental Sciences, University of Iceland, Reykjavík, Iceland
| | - Leila Allahgholi
- Biotechnology, Department of Chemistry, Lund University, Lund, Sweden
| | - Anna Zieri
- IMC University of Applied Sciences Krems, Krems, Austria
| | - Isabella Zangl
- IMC University of Applied Sciences Krems, Krems, Austria
| | | | - Jóhann Örlygsson
- Faculty of Natural Resource Sciences, University of Akureyri, Akureyri, Iceland
| | | | - Ólafur H Friðjónsson
- Department of Biotechnology, Matís Ohf, Reykjavík, Iceland
- Faculty of Life and Environmental Sciences, University of Iceland, Reykjavík, Iceland
| | - Guðmundur Óli Hreggviðsson
- Department of Biotechnology, Matís Ohf, Reykjavík, Iceland
- Faculty of Life and Environmental Sciences, University of Iceland, Reykjavík, Iceland
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Assessment of Starters of Lactic Acid Bacteria and Killer Yeasts: Selected Strains in Lab-Scale Fermentations of Table Olives (Olea europaea L.) cv. Leccino. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9020182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Olives debittering, organoleptic quality and safety can be improved with yeasts and lactic acid bacteria (LABs) selected strain starters, that allow for better fermentation control with respect to natural fermentation. Two selected killer yeasts (Wickerhamomyces anomalus and Saccharomyces cerevisiae) and Lactobacillus plantarum strains were tested for olive (cv. Leccino) fermentation to compare different starter combinations and strategies; the aim was to assess their potential in avoiding pretreatments and the use of excessive salt in the brines and preservatives. Lactobacilli, yeasts, molds, Enterobacteriaceae and total aerobic bacteria were detected, as well as pH, soluble sugars, alcohols, organic acids, phenolic compounds, and rheological properties of olives. Sugars were rapidly consumed in the brines and olives; the pH dropped quickly, then rose until neutrality after six months. The oleuropein final levels in olives were unaffected by the treatments. The use of starters did not improve the LABs’ growth nor prevent the growth of Enterobacteriaceae and molds. The growth of undesirable microorganisms could have been induced by the availability of selective carbon source such as mannitol, whose concentration in olive trees rise under drought stress. The possible role of climate change on the quality and safety of fermented foods should be furtherly investigated. The improvement of olives’ nutraceutical value can be induced by yeasts and LABs starters due to the higher production of hydroxytyrosol.
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Li W, Lu L, Cheng C, Ren N, Yang ST, Liu M. Biohydrogen production from brown algae fermentation: Relationship between substrate reduction degree and hydrogen production. BIORESOURCE TECHNOLOGY 2022; 364:128069. [PMID: 36208827 DOI: 10.1016/j.biortech.2022.128069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/28/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
In this study, mannitol and mannitol-rich seaweed were fermented to investigate the relationship between substrate reduction degree and hydrogen production performance. The results showed that acetate was required in mannitol fermentation with an optimum acetate/mannitol mass ratio of 1:5. Hydrogen production and yield of mannitol fermentation reached 123.76 mL and 2.12 mol/mol-mannitol, respectively, 42.02 % and 26.95 % higher than that of glucose, respectively. The acetate was fully assimilated and the butyrate selectivity reached 100 % in the effluent. Redox potential and electron distribution showed that mannitol increased the overall electron input from mannitol and acetate, leading to the increase in hydrogen and butyrate generation. Hydrogen yield reached 2.33 mol/mol-mannitol with brown algae hydrolysate, which was the highest ever reported. This study demonstrated that substrate with a higher reduction degree could yield higher hydrogen and showed the great application potential of brown algae fermentation for the co-production of hydrogen and butyrate.
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Affiliation(s)
- Weiming Li
- School of Environmental Science and Technology, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
| | - Lihui Lu
- School of Environmental Science and Technology, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China
| | - Chi Cheng
- School of Bioengineering, Dalian University of Technology, Dalian 116024, China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shang-Tian Yang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH, 43210, USA
| | - Meng Liu
- School of Environmental Science and Technology, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian University of Technology, Dalian 116024, China.
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Osama N, Bakeer W, Raslan M, Soliman HA, Abdelmohsen UR, Sebak M. Anti-cancer and antimicrobial potential of five soil Streptomycetes: a metabolomics-based study. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211509. [PMID: 35154794 PMCID: PMC8825997 DOI: 10.1098/rsos.211509] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/14/2022] [Indexed: 05/03/2023]
Abstract
Lack of new anti-cancer and anti-infective agents directed the pharmaceutical research to natural products' discovery especially from actinomycetes as one of the major sources of bioactive compounds. Metabolomics- and dereplication-guided approach has been used successfully in chemical profiling of bioactive actinomycetes. We aimed to study the metabolomic profile of five bioactive actinomycetes to investigate the interesting metabolites responsible for their antimicrobial and anti-cancer activities. Three actinomycetes, namely, Streptomyces sp. SH8, SH10 and SH13, were found to exhibit broad spectrum of antimicrobial activities, whereas isolate SH4 showed the broadest antimicrobial activity against all tested strains. In addition, isolates SH8, SH10 and SH12 displayed potent cytotoxicity against the breast cancer cell line Michigan Cancer Foundation-7 (MCF-7), whereas isolates SH4 and SH12 exhibited potent anti-cancer activity against the hepatoma cell line hepatoma G2 (HepG2) compared with their weak inhibitory properties on the normal breast cells MCF-10A and normal liver cells transformed human liver epithelial-2 (THLE2), respectively. All bioactive isolates were molecularly identified as Streptomyces sp. via 16S rRNA gene sequencing. Our actinobacterial dereplication analysis revealed putative identification of several bioactive metabolites including tetracycline, oxytetracycline and a macrolide antibiotic, novamethymycin. Together, chemical profiling of bioactive Streptomycetes via dereplication and metabolomics helped in assigning their unique metabolites and predicting the bioactive compounds instigating their diverse bioactivities.
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Affiliation(s)
- Nada Osama
- Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Walid Bakeer
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Mai Raslan
- Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Hanan A. Soliman
- Biochemistry Division, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minia 61111, Egypt
| | - Mohamed Sebak
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
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Li C, Liu Z, Ning D, Pan J, Li J. Co‐Production of Bio‐Ethanol and Bio‐Oil from Different Species of Macroalgae. ChemistrySelect 2021. [DOI: 10.1002/slct.202004518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chen Li
- College of Chemistry and Chemical Engineering State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao University Qingdao 266071 China
| | - Zhongxin Liu
- College of Chemistry and Chemical Engineering State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao University Qingdao 266071 China
| | - Dandan Ning
- College of Chemistry and Chemical Engineering State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao University Qingdao 266071 China
| | - Jingwen Pan
- College of Chemistry and Chemical Engineering State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao University Qingdao 266071 China
| | - Jinhua Li
- College of Chemistry and Chemical Engineering State Key Laboratory of Bio-Fibers and Eco-Textiles Qingdao University Qingdao 266071 China
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Ahmed M, Hameed B. Hydrogenation of glucose and fructose into hexitols over heterogeneous catalysts: A review. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.11.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Costa PPKG, Mendes TD, Salum TFC, Pacheco TF, Braga SC, de Almeida JRM, Gonçalves SB, Damaso MCT, Rodrigues CM. Development and validation of HILIC-UHPLC-ELSD methods for determination of sugar alcohols stereoisomers and its application for bioconversion processes of crude glycerin. J Chromatogr A 2018; 1589:56-64. [PMID: 30621908 DOI: 10.1016/j.chroma.2018.12.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 02/06/2023]
Abstract
The recent increase in the production of crude glycerin through the manufacture of biodiesel has imputed a commercial issue, the excess of this raw material in the market and its constant devaluation, which resulted in the need for new technologies for its use. Crude glycerin can be used in biotechnological processes for the production of high value-added compounds. This study presents novel, simple and fast methods based on ultra-high performance liquid chromatography (UHPLC) using evaporative light scattering detection (ELSD) for simultaneous analysis of ten sugar alcohols with a hydrophilic interaction chromatography (HILIC) column. The selected compounds and their possible stereoisomers have major commercial importance and they can be obtained by biotechnological routes. Under optimized conditions, threitol, erythritol, adonitol, xylitol, arabitol, iditol, sorbitol, mannitol, dulcitol and volemitol can be analyzed simultaneously within 15.0 min. The use of different column temperatures was a key parameter to reach the selectivity during the separation of some stereoisomers. Regression equations revealed a good linear relationship (R > 0.995) over the range from 50.0 to 800.0 ng. Limits of detection (LOD) and quantification (LOQ) ranged from 30.0 to 45.0 ng and 50.0-75.0 ng, respectively. The HILIC-UHPLC-ELSD methods showed good precision with low coefficient of variation (CV%) for the intra- and inter-assays experiments (≤ 5.1%) and high repeatability in terms of retention times for each analyte (≤ 0.5%). The accuracy was confirmed with an average recovery ranging from 92.3 to 107.3%. The developed methods employ an analytical technique more accessible and suitable for routine analyzes and have shown to be suitable for simultaneous analysis of sugar alcohols present in crude bioconverted glycerin samples using different classes of microorganisms.
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Affiliation(s)
- Patrícia P K G Costa
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil.
| | - Thaís D Mendes
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
| | - Thaís F C Salum
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
| | - Thályta F Pacheco
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
| | - Samira C Braga
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil; Institute of Chemistry, University of Brasília, Campus Universitário Darcy Ribeiro, 70910-900, Brasília, DF, Brazil
| | - João Ricardo M de Almeida
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
| | - Sílvia B Gonçalves
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
| | - Mônica C T Damaso
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
| | - Clenilson M Rodrigues
- Brazilian Agricultural Research Corporation, Embrapa Agroenergy, W3 Norte, PqEB, 70770-901, Brasília, DF, Brazil
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Li Y, Liu K, Wang Y, Zhou Z, Chen C, Ye P, Yu F. Improvement of cadmium phytoremediation by Centella asiatica L. after soil inoculation with cadmium-resistant Enterobacter sp. FM-1. CHEMOSPHERE 2018; 202:280-288. [PMID: 29573613 DOI: 10.1016/j.chemosphere.2018.03.097] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/12/2018] [Accepted: 03/14/2018] [Indexed: 05/27/2023]
Abstract
This study examined the potential of a cadmium-resistant Enterobacter sp. FM-1 to promote plant growth and assist in cadmium accumulation in both mine-type C. asiatica L. and non-mine type C. asiatica L. tissues in highly cadmium-polluted soils. The results indicated that Enterobacter sp. FM-1 significantly promoted growth and alleviated metal toxicity in both types of C. asiatica L. Meanwhile, inoculation with Enterobacter sp. FM-1 in contaminated soil can increased cadmium bioavailability in soil. Furthermore, it will increase plant uptake and the accumulation of cadmium in C. asiatica L. leaves, stems and roots compared to that in an uninoculated plant. However, mine-type C. asiatica L. had better cadmium tolerance than the non mine-type C. asiatica L. Because of its native metal-tolerant ability, which could easily grow and proliferate, and had a better performance under cadmium-contamination conditions. Additionally, inoculation with Enterobacter sp. FM-1 significantly enhanced the bioaccumulation factor (BAF) and the translocation factor (TF) values in both types of C. asiatica L. even under high cadmium concentration soil condition. Hence, based on higher BAF and TF values and strong cadmium accumulation in the leaves and stems, we concluded that inoculation with Enterobacter sp. FM-1 is potentially useful for the phytoremediation of cadmium-contaminated sites by Centella asiatica L.
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Affiliation(s)
- Yi Li
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China; Key Laboratory of Karst Ecology and Environment Change of Guangxi Department of Education, Guangxi Normal University, 541004, Guilin, China; College of Environment and Resource, Guangxi Normal University, 541004, Guilin, China
| | - Kehui Liu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China; College of Life Science, Guangxi Normal University, 541004, Guilin, China
| | - Yang Wang
- College of Environment and Resource, Guangxi Normal University, 541004, Guilin, China
| | - Zhenming Zhou
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China; Key Laboratory of Karst Ecology and Environment Change of Guangxi Department of Education, Guangxi Normal University, 541004, Guilin, China; College of Environment and Resource, Guangxi Normal University, 541004, Guilin, China
| | - Chaoshu Chen
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China; Key Laboratory of Karst Ecology and Environment Change of Guangxi Department of Education, Guangxi Normal University, 541004, Guilin, China; College of Environment and Resource, Guangxi Normal University, 541004, Guilin, China
| | - Panhua Ye
- College of Environment and Resource, Guangxi Normal University, 541004, Guilin, China
| | - Fangming Yu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China; Key Laboratory of Karst Ecology and Environment Change of Guangxi Department of Education, Guangxi Normal University, 541004, Guilin, China; College of Environment and Resource, Guangxi Normal University, 541004, Guilin, China.
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Lysine production from the sugar alcohol mannitol: Design of the cell factory Corynebacterium glutamicum SEA-3 through integrated analysis and engineering of metabolic pathway fluxes. Metab Eng 2018; 47:475-487. [DOI: 10.1016/j.ymben.2018.04.019] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 04/09/2018] [Accepted: 04/24/2018] [Indexed: 11/30/2022]
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10
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Grembecka M. Sugar Alcohols as Sugar Substitutes in Food Industry. REFERENCE SERIES IN PHYTOCHEMISTRY 2018. [DOI: 10.1007/978-3-319-27027-2_23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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11
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Podleśny M, Kubik-Komar A, Kucharska J, Wyrostek J, Jarocki P, Targoński Z. Media optimization for economic succinic acid production by Enterobacter sp. LU1. AMB Express 2017. [PMID: 28633512 PMCID: PMC5476557 DOI: 10.1186/s13568-017-0423-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Enterobacter sp. LU1 could efficiently convert glycerol to succinic acid under anaerobic conditions after the addition of lactose. In this study, media constituents affecting both Enterobacter sp. LU1 biomass and succinic acid production were investigated employing response surface methodology (RSM) with central composite design. Statistical methods led to the development of an efficient and inexpensive microbiological media based on crude glycerol, whey permeate as carbon sources and urea as a nitrogen source. The optimized production of bacterial biomass in aerobic conditions was predicted and the interactive effects between crude glycerol, urea and magnesium sulfate were investigated. As a result, a model for predicting the concentration of bacterial biocatalyst biomass was developed with crude glycerol as a sole carbon source. In addition, it was observed that the interactive effect between crude glycerol and urea was statistically significant. Response surface methodology was also employed to develop the model for predicting the concentration of succinic acid produced. Validity of the model was confirmed during verification experiments wherein actual results differed from predicted values by 0.77%. The applied statistical methods proved the feasibility for anaerobic succinic acid production on crude glycerol without expensive yeast extract addition. In conclusion, the RSM method can provide valuable information for succinic acid scale-up fermentation using Enterobacter sp. LU1.
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Kuk SK, Singh RK, Nam DH, Singh R, Lee JK, Park CB. Photoelectrochemical Reduction of Carbon Dioxide to Methanol through a Highly Efficient Enzyme Cascade. Angew Chem Int Ed Engl 2017; 56:3827-3832. [PMID: 28120367 DOI: 10.1002/anie.201611379] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Indexed: 11/06/2022]
Abstract
Natural photosynthesis is an effective route for the clean and sustainable conversion of CO2 into high-energy chemicals. Inspired by the natural process, a tandem photoelectrochemical (PEC) cell with an integrated enzyme-cascade (TPIEC) system was designed, which transfers photogenerated electrons to a multienzyme cascade for the biocatalyzed reduction of CO2 to methanol. A hematite photoanode and a bismuth ferrite photocathode were applied to fabricate the iron oxide based tandem PEC cell for visible-light-assisted regeneration of the nicotinamide cofactor (NADH). The cell utilized water as an electron donor and spontaneously regenerated NADH. To complete the TPIEC system, a superior three-dehydrogenase cascade system was employed in the cathodic part of the PEC cell. Under applied bias, the TPIEC system achieved a high methanol conversion output of 220 μm h-1 , 1280 μmol g-1 h-1 using readily available solar energy and water.
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Affiliation(s)
- Su Keun Kuk
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 335 Science Road, Daejeon, 305-701, Republic of Korea
| | - Raushan K Singh
- Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Seoul, 143-701, Republic of Korea
| | - Dong Heon Nam
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 335 Science Road, Daejeon, 305-701, Republic of Korea
| | - Ranjitha Singh
- Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Seoul, 143-701, Republic of Korea
| | - Jung-Kul Lee
- Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Seoul, 143-701, Republic of Korea
| | - Chan Beum Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 335 Science Road, Daejeon, 305-701, Republic of Korea
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13
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Kuk SK, Singh RK, Nam DH, Singh R, Lee JK, Park CB. Photoelectrochemical Reduction of Carbon Dioxide to Methanol through a Highly Efficient Enzyme Cascade. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611379] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Su Keun Kuk
- Department of Materials Science and Engineering; Korea Advanced Institute of Science and Technology; 335 Science Road Daejeon 305-701 Republic of Korea
| | - Raushan K Singh
- Department of Chemical Engineering; Konkuk University; 120 Neungdong-ro Seoul 143-701 Republic of Korea
| | - Dong Heon Nam
- Department of Materials Science and Engineering; Korea Advanced Institute of Science and Technology; 335 Science Road Daejeon 305-701 Republic of Korea
| | - Ranjitha Singh
- Department of Chemical Engineering; Konkuk University; 120 Neungdong-ro Seoul 143-701 Republic of Korea
| | - Jung-Kul Lee
- Department of Chemical Engineering; Konkuk University; 120 Neungdong-ro Seoul 143-701 Republic of Korea
| | - Chan Beum Park
- Department of Materials Science and Engineering; Korea Advanced Institute of Science and Technology; 335 Science Road Daejeon 305-701 Republic of Korea
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14
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Optimization of Reducing Sugar Production from Manihot glaziovii Starch Using Response Surface Methodology. ENERGIES 2017. [DOI: 10.3390/en10010035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ji SQ, Wang B, Lu M, Li FL. Direct bioconversion of brown algae into ethanol by thermophilic bacterium Defluviitalea phaphyphila. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:81. [PMID: 27042210 PMCID: PMC4818487 DOI: 10.1186/s13068-016-0494-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 03/22/2016] [Indexed: 05/13/2023]
Abstract
BACKGROUND Brown algae are promising feedstocks for biofuel production with inherent advantages of no structural lignin, high growth rate, and no competition for land and fresh water. However, it is difficult for one microorganism to convert all components of brown algae with different oxidoreduction potentials to ethanol. Defluviitalea phaphyphila Alg1 is the first characterized thermophilic bacterium capable of direct utilization of brown algae. RESULTS Defluviitalea phaphyphila Alg1 can simultaneously utilize mannitol, glucose, and alginate to produce ethanol, and high ethanol yields of 0.47 g/g-mannitol, 0.44 g/g-glucose, and 0.3 g/g-alginate were obtained. A rational redox balance system under obligate anaerobic condition in fermenting brown algae was revealed in D. phaphyphila Alg1 through genome and redox analysis. The excess reducing equivalents produced from mannitol metabolism were equilibrated by oxidizing forces from alginate assimilation. Furthermore, D. phaphyphila Alg1 can directly utilize unpretreated kelp powder, and 10 g/L of ethanol was accumulated within 72 h with an ethanol yield of 0.25 g/g-kelp. Microscopic observation further demonstrated the deconstruction process of brown algae cell by D. phaphyphila Alg1. CONCLUSIONS The integrated biomass deconstruction system of D. phaphyphila Alg1, as well as its high ethanol yield, provided us an excellent alternative for brown algae bioconversion at elevated temperature.
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Affiliation(s)
- Shi-Qi Ji
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 People’s Republic of China
| | - Bing Wang
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 People’s Republic of China
| | - Ming Lu
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 People’s Republic of China
| | - Fu-Li Li
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 People’s Republic of China
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Xia A, Jacob A, Herrmann C, Tabassum MR, Murphy JD. Production of hydrogen, ethanol and volatile fatty acids from the seaweed carbohydrate mannitol. BIORESOURCE TECHNOLOGY 2015; 193:488-497. [PMID: 26163759 DOI: 10.1016/j.biortech.2015.06.130] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 06/10/2015] [Accepted: 06/26/2015] [Indexed: 06/04/2023]
Abstract
Fermentative hydrogen from seaweed is a potential biofuel of the future. Mannitol, which is a typical carbohydrate component of seaweed, was used as a substrate for hydrogen fermentation. The theoretical specific hydrogen yield (SHY) of mannitol was calculated as 5 mol H2/mol mannitol (615.4 mL H2/g mannitol) for acetic acid pathway, 3 mol H2/mol mannitol (369.2 mL H2/g mannitol) for butyric acid pathway and 1 mol H2/mol mannitol (123.1 mL H2/g mannitol) for lactic acid and ethanol pathways. An optimal SHY of 1.82 mol H2/mol mannitol (224.2 mL H2/g mannitol) was obtained by heat pre-treated anaerobic digestion sludge under an initial pH of 8.0, NH4Cl concentration of 25 mM, NaCl concentration of 50mM and mannitol concentration of 10 g/L. The overall energy conversion efficiency achieved was 96.1%. The energy was contained in the end products, hydrogen (17.2%), butyric acid (38.3%) and ethanol (34.2%).
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Affiliation(s)
- Ao Xia
- Environmental Research Institute, University College Cork, Cork, Ireland; Science Foundation Ireland (SFI), Marine Renewable Energy Ireland (MaREI) Centre, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Amita Jacob
- Environmental Research Institute, University College Cork, Cork, Ireland; Science Foundation Ireland (SFI), Marine Renewable Energy Ireland (MaREI) Centre, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Christiane Herrmann
- Environmental Research Institute, University College Cork, Cork, Ireland; Science Foundation Ireland (SFI), Marine Renewable Energy Ireland (MaREI) Centre, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Muhammad Rizwan Tabassum
- Environmental Research Institute, University College Cork, Cork, Ireland; Science Foundation Ireland (SFI), Marine Renewable Energy Ireland (MaREI) Centre, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Jerry D Murphy
- Environmental Research Institute, University College Cork, Cork, Ireland; Science Foundation Ireland (SFI), Marine Renewable Energy Ireland (MaREI) Centre, Ireland; School of Engineering, University College Cork, Cork, Ireland.
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Yang X, Wen L, Liu X, Chen S, Wang Y, Wan C. Bio-augmentative volatile fatty acid production from waste activated sludge hydrolyzed at pH 12. RSC Adv 2015. [DOI: 10.1039/c5ra04651c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Although many pretreatment methods are employed to enhance the hydrolysis of waste activated sludge (WAS), the bioconversion of soluble complex substrates needs improvement to produce higher volatile fatty acids (VFAs).
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Affiliation(s)
- Xue Yang
- Postdoctoral Research Station of Civil Engineering
- Tongji University
- Shanghai 200092
- China
- State Key Laboratory of Pollution Control and Resources Reuse
| | - Lei Wen
- Department of Environmental Science and Engineering
- Fudan University
- Shanghai 200433
- China
| | - Xiang Liu
- Department of Environmental Science and Engineering
- Fudan University
- Shanghai 200433
- China
| | - Si Chen
- Department of Environmental Science and Engineering
- Fudan University
- Shanghai 200433
- China
| | - Yayi Wang
- State Key Laboratory of Pollution Control and Resources Reuse
- College of Environmental Science and Engineering
- Tongji University
- Shanghai 200092
- China
| | - Chunli Wan
- Department of Environmental Science and Engineering
- Fudan University
- Shanghai 200433
- China
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Sun C, Chen YJ, Zhang XQ, Pan J, Cheng H, Wu M. Draft genome sequence of Microbulbifer elongatus strain HZ11, a brown seaweed-degrading bacterium with potential ability to produce bioethanol from alginate. Mar Genomics 2014; 18 Pt B:83-5. [PMID: 24907394 DOI: 10.1016/j.margen.2014.05.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 05/23/2014] [Accepted: 05/24/2014] [Indexed: 10/25/2022]
Abstract
Microbulbifer elongatus strain HZ11, was a new strain of M. elongates DSM 6810(T), which has the ability to degrade brown seaweeds such as Laminaria japonica into single cell detritus particles. Here we report a high quality draft genome of M. elongatus strain HZ11, which comprises 4,223,108bp in 9 contigs with the G+C content of 56.70%. A total of 3293 protein-coding sequences were predicted, including nine alginate lyases (EC 4.2.2.3), five agarases (EC 3.2.1.81), 2-dehydro-3-deoxygluconate kinase (EC 2.7.1.45) and all enzymes involved in the Entner-Doudoroff pathway. Our results suggest that strain HZ11 has the potential ability to produce bioethanol from alginate with moderate genetic modification, which may significantly increase the yield of bioethanol from brown seaweed and the utilization rate of brown seaweeds.
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Affiliation(s)
- Cong Sun
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yu-Jie Chen
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Xin-Qi Zhang
- School of Foresty and Biotechnology, Zhejiang Agriculture and Forestry University, Linan, China
| | - Jie Pan
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Hong Cheng
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Min Wu
- College of Life Sciences, Zhejiang University, Hangzhou, China.
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Xu X, Kim JY, Oh YR, Park JM. Production of biodiesel from carbon sources of macroalgae, Laminaria japonica. BIORESOURCE TECHNOLOGY 2014; 169:455-461. [PMID: 25084043 DOI: 10.1016/j.biortech.2014.07.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 07/02/2014] [Accepted: 07/03/2014] [Indexed: 05/29/2023]
Abstract
As aquatic biomass which is called "the third generation biomass", Laminaria japonica (also known as Saccharina japonica) consists of mannitol and alginate which are the main polysaccharides of algal carbohydrates. In this study, oleaginous yeast (Cryptococcus curvatus) was used to produce lipid from carbon sources derived from Laminaria japonica. Volatile fatty acids (VFAs) were produced by fermentation of alginate extracted from L. japonica. Thereafter, mannitol was mixed with VFAs to culture the oleaginous yeast. The highest lipid content was 48.30%. The composition of the fatty acids was similar to vegetable oils. This is the first confirmation of the feasibility of using macroalgae as a carbon source for biodiesel production.
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Affiliation(s)
- Xu Xu
- School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
| | - Ji Young Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
| | - Yu Ri Oh
- Department of Chemical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea
| | - Jong Moon Park
- School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea; Department of Chemical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea; Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea.
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Yoshikawa J, Habe H, Morita T, Fukuoka T, Imura T, Iwabuchi H, Uemura S, Tamura T, Kitamoto D. Production of mannitol from raw glycerol by Candida azyma. J Biosci Bioeng 2014; 117:725-9. [DOI: 10.1016/j.jbiosc.2013.11.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/20/2013] [Accepted: 11/26/2013] [Indexed: 11/25/2022]
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Harun R, Yip JWS, Thiruvenkadam S, Ghani WAWAK, Cherrington T, Danquah MK. Algal biomass conversion to bioethanol - a step-by-step assessment. Biotechnol J 2013; 9:73-86. [DOI: 10.1002/biot.201200353] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 09/18/2013] [Accepted: 10/15/2013] [Indexed: 01/08/2023]
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