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Branska B, Koppova K, Husakova M, Patakova P. Application of fed-batch strategy to fully eliminate the negative effect of lignocellulose-derived inhibitors in ABE fermentation. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:87. [PMID: 38915101 PMCID: PMC11197323 DOI: 10.1186/s13068-024-02520-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 05/16/2024] [Indexed: 06/26/2024]
Abstract
BACKGROUND Inhibitors that are released from lignocellulose biomass during its treatment represent one of the major bottlenecks hindering its massive utilization in the biotechnological production of chemicals. This study demonstrates that negative effect of inhibitors can be mitigated by proper feeding strategy. Both, crude undetoxified lignocellulose hydrolysate and complex medium supplemented with corresponding inhibitors were tested in acetone-butanol-ethanol (ABE) fermentation using Clostridium beijerinckii NRRL B-598 as the producer strain. RESULTS First, it was found that the sensitivity of C. beijerinckii to inhibitors varied with different growth stages, being the most significant during the early acidogenic phase and less pronounced during late acidogenesis and early solventogenesis. Thus, a fed-batch regime with three feeding schemes was tested for toxic hydrolysate (no growth in batch mode was observed). The best results were obtained when the feeding of an otherwise toxic hydrolysate was initiated close to the metabolic switch, resulting in stable and high ABE production. Complete utilization of glucose, and up to 88% of xylose, were obtained. The most abundant inhibitors present in the alkaline wheat straw hydrolysate were ferulic and coumaric acids; both phenolic acids were efficiently detoxified by the intrinsic metabolic activity of clostridia during the early stages of cultivation as well as during the feeding period, thus preventing their accumulation. Finally, the best feeding strategy was verified using a TYA culture medium supplemented with both inhibitors, resulting in 500% increase in butanol titer over control batch cultivation in which inhibitors were added prior to inoculation. CONCLUSION Properly timed sequential feeding effectively prevented acid-crash and enabled utilization of otherwise toxic substrate. This study unequivocally demonstrates that an appropriate biotechnological process control strategy can fully eliminate the negative effects of lignocellulose-derived inhibitors.
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Affiliation(s)
- Barbora Branska
- Department of Biotechnology, University of Chemistry and Technology Prague, Technická 5, 16628, Prague, Czech Republic.
| | - Kamila Koppova
- Department of Biotechnology, University of Chemistry and Technology Prague, Technická 5, 16628, Prague, Czech Republic
| | - Marketa Husakova
- Department of Biotechnology, University of Chemistry and Technology Prague, Technická 5, 16628, Prague, Czech Republic
| | - Petra Patakova
- Department of Biotechnology, University of Chemistry and Technology Prague, Technická 5, 16628, Prague, Czech Republic
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Nabila DS, Chan R, Syamsuri RRP, Nurlilasari P, Wan-Mohtar WAAQI, Ozturk AB, Rossiana N, Doni F. Biobutanol production from underutilized substrates using Clostridium: Unlocking untapped potential for sustainable energy development. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100250. [PMID: 38974669 PMCID: PMC11225672 DOI: 10.1016/j.crmicr.2024.100250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024] Open
Abstract
The increasing demand for sustainable energy has brought biobutanol as a potential substitute for fossil fuels. The Clostridium genus is deemed essential for biobutanol synthesis due to its capability to utilize various substrates. However, challenges in maintaining fermentation continuity and achieving commercialization persist due to existing barriers, including butanol toxicity to Clostridium, low substrate utilization rates, and high production costs. Proper substrate selection significantly impacts fermentation efficiency, final product quality, and economic feasibility in Clostridium biobutanol production. This review examines underutilized substrates for biobutanol production by Clostridium, which offer opportunities for environmental sustainability and a green economy. Extensive research on Clostridium, focusing on strain development and genetic engineering, is essential to enhance biobutanol production. Additionally, critical suggestions for optimizing substrate selection to enhance Clostridium biobutanol production efficiency are also provided in this review. In the future, cost reduction and advancements in biotechnology may make biobutanol a viable alternative to fossil fuels.
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Affiliation(s)
- Devina Syifa Nabila
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Rosamond Chan
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | | | - Puspita Nurlilasari
- Department of Agro-industrial Technology, Faculty of Agro-industrial Technology, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Wan Abd Al Qadr Imad Wan-Mohtar
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Abdullah Bilal Ozturk
- Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Esenler, Istanbul 34220, Türkiye
| | - Nia Rossiana
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Febri Doni
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
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Saba B, Bharathidasan AK, Ezeji TC, Cornish K. Characterization and potential valorization of industrial food processing wastes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 868:161550. [PMID: 36652966 DOI: 10.1016/j.scitotenv.2023.161550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/04/2023] [Accepted: 01/07/2023] [Indexed: 06/17/2023]
Abstract
Valorization and utilization of industrial food processing waste as value added products, platform chemicals and biofuels, are needed to improve sustainability and reduce waste management costs. Various industrial food waste stream samples were characterized with respect to their physico-chemical characteristics and elemental composition. A subset of starchy food wastes and milk dust powder were evaluated in batch fermentation to acetone, a useful platform chemical. Production levels were similar to acetone produced from glucose but were achieved more quickly. Lactose concentration negatively affected fermentation and led to 50 % lower acetone concentration from milk dust powder than from starchy wastes. Uncooked starch waste can produce 20 % more acetone than cooked and modified starch waste. Fatty waste and mineral waste can be digested anaerobically generating biogas. Calorific value of soybean waste was 40 MJ/kg sufficiently high for biodiesel production. Low C/N ratios of wastewater and solids from food processing waste makes them unsuitable for anaerobic digestion but these waste types can be converted thermochemically to hydrochar and used as soil amendments. Low calorific content (10-15 MJ/kg) vegetable wastes also are not ideal for energy production, but are rich in flavonoids, antioxidants and pigments which can be extracted as valuable products. A model mapping food waste characteristics to best valorization pathway was developed to guide waste management and future cost and environmental impact analyses. These findings will help advance food industry knowledge and improve sustainable food production through valorized processing waste management.
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Affiliation(s)
- Beenish Saba
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, 590 Woody Hayes Drive, Columbus, OH 43210, USA
| | - Ashok K Bharathidasan
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, 590 Woody Hayes Drive, Columbus, OH 43210, USA
| | - Thaddeus C Ezeji
- Department of Animal Science, Ohio Agricultural Research and Development Center, CFAES Wooster Campus, The Ohio State University, 1680 Madison Avenue, Wooster, OH 44691, USA
| | - Katrina Cornish
- Department of Food, Agricultural and Biological Engineering, The Ohio State University, 590 Woody Hayes Drive, Columbus, OH 43210, USA; Department of Horticulture and Crop Science, The Ohio State University, 1680 Madison Avenue, Wooster, OH 44691, USA; Department of Food, Agricultural and Biological Engineering, The Ohio State University, 1680 Madison Avenue, Wooster, OH 44691, USA.
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Delarouzée A, Lopes Ferreira N, Wasels F. Alleviation of Carbon Catabolite Repression through araR and xylR Inactivation in Clostridium acetobutylicum DSM 792. Appl Environ Microbiol 2023; 89:e0213522. [PMID: 36779716 PMCID: PMC10057040 DOI: 10.1128/aem.02135-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/15/2023] [Indexed: 02/14/2023] Open
Abstract
Efficient bioconversion processes of lignocellulose-derived carbohydrates into chemicals have received increasing interest in the last decades since they represent a promising alternative to petro-based processes. Despite efforts to adapt microorganisms to the use of such substrates, one of their major limitations remains their inability to consume multiple sugars simultaneously. In particular, the solventogenic model organism Clostridium acetobutylicum struggles to efficiently use second generation (2G) substrates because of carbon catabolite repression mechanisms that prevent the assimilation of xylose and arabinose in the presence of glucose. In this study, we addressed this issue by inactivating genes encoding transcriptional repressors involved in such mechanisms in the C. acetobutylicum strain DSM 792. Our results showed that the deletion of the two putative copies of xylR (CA_C2613 and CA_C3673) had little or no effect on the ability of the strain to consume xylose. Unlikely, the deletion of araR (CA_C1340) led to a 2.5-fold growth rate increase on xylose. The deletion of both araR and xylR genes resulted in the coassimilation of arabinose together with glucose, while xylose consumption remained inefficient. Transcriptional analyses of the wild-type strain and mutants grown on glucose, arabinose, xylose, and combinations of them provided a crucial, global overview of regulations triggered by the products of both araR and xylR in C. acetobutylicum. As suggested by these data, overexpression of xylA and xylB led to further improvement of pentose assimilation. Those results represent a step forward in the development of genetically modified strains of C. acetobutylicum able to coassimilate lignocellulosic-derived sugars. IMPORTANCE C. acetobutylicum is a strong candidate to produce chemicals of interest such as C3 and C4 alcohols. Used for more than a century for its capacity to produce a mixture of acetone, butanol, and ethanol from first generation (1G) substrates, its natural ability to assimilate a wide variety of monoosides also predisposes it as an auspicious organism for the valorization of lignocellulose-derived sugar mixtures. To achieve this purpose, a better understanding of carbon catabolite repression mechanisms is essential. The work done here provides critical knowledge on how these mechanisms occur during growth on glucose, arabinose, and xylose mixtures, as well as strategies to tackle them.
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Olorunsogbon T, Adesanya Y, Atiyeh HK, Okonkwo CC, Ujor VC, Ezeji TC. Effects of Clostridium beijerinckii and Medium Modifications on Acetone–Butanol–Ethanol Production From Switchgrass. Front Bioeng Biotechnol 2022; 10:942701. [PMID: 35992339 PMCID: PMC9382077 DOI: 10.3389/fbioe.2022.942701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 06/20/2022] [Indexed: 11/29/2022] Open
Abstract
The presence of lignocellulose-derived microbial inhibitory compounds (LDMICs) in lignocellulosic biomass (LB) hydrolysates is a barrier to efficient conversion of LB hydrolysates to fuels and chemicals by fermenting microorganisms. Results from this study provide convincing evidence regarding the effectiveness of metabolically engineered C. beijerinckii NCIMB 8052 for the fermentation of LB-derived hydrolysates to acetone–butanol–ethanol (ABE). The engineered microbial strain (C. beijerinckii_SDR) was produced by the integration of an additional copy of a short-chain dehydrogenase/reductase (SDR) gene (Cbei_3904) into the chromosome of C. beijerinckii NCIMB 8052 wildtype, where it is controlled by the constitutive thiolase promoter. The C. beijerinckii_SDR and C. beijerinckii NCIMB 8052 wildtype were used for comparative fermentation of non-detoxified and detoxified hydrothermolysis-pretreated switchgrass hydrolysates (SHs) with and without (NH4)2CO3 supplementation. In the absence of (NH4)2CO3, fermentation of non-detoxified SH with C. beijerinckii_SDR resulted in the production of 3.13- and 2.25-fold greater quantities of butanol (11.21 g/L) and total ABE (20.24 g/L), respectively, than the 3.58 g/L butanol and 8.98 g/L ABE produced by C. beijerinckii_wildtype. When the non-detoxified SH was supplemented with (NH4)2CO3, concentrations were similar for butanol (9.5 compared with 9.2 g/L) and ABE (14.2 compared with 13.5 g/L) produced by C. beijerinckii_SDR and C. beijerinckii_wildtype, respectively. Furthermore, when C. beijerinckii_SDR and C. beijerinckii_wildtype were cultured in detoxified SH medium, C. beijerinckii_SDR produced 1.11- and 1.18-fold greater quantities of butanol and ABE, respectively, than when there was culturing with C. beijerinckii_wildtype. When the combined results of the present study are considered, conclusions are that the microbial strain and medium modifications of the fermentation milieu resulted in greater production of fuels and chemicals from non-detoxified LB hydrolysates.
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Affiliation(s)
- Tinuola Olorunsogbon
- Department of Animal Science, The Ohio State University, Wooster, OH, United States
| | - Yinka Adesanya
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, United States
| | - Hasan K. Atiyeh
- Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK, United States
| | - Christopher Chukwudi Okonkwo
- Biotechnology Program, College of Science, The Roux Institute, Northeastern University, Portland, ME, United States
| | - Victor Chinomso Ujor
- Department of Food Science, University of Wisconsin-Madison, Maddison, WI, United States
| | - Thaddeus Chukwuemeka Ezeji
- Department of Animal Science, The Ohio State University, Wooster, OH, United States
- *Correspondence: Thaddeus Chukwuemeka Ezeji,
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6
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Zhu Y, Li W, Meng D, Li X, Goodell B. Non-enzymatic modification of the crystalline structure and chemistry of Masson pine in brown-rot decay. Carbohydr Polym 2022; 286:119242. [DOI: 10.1016/j.carbpol.2022.119242] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/06/2022] [Accepted: 02/08/2022] [Indexed: 12/15/2022]
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7
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Yang J, Jiang D, Shui X, Lei T, Zhang H, Zhang Z, Zhang X, Zhu S, Zhang Q. Effect of 5-HMF and furfural additives on bio-hydrogen production by photo-fermentation from giant reed. BIORESOURCE TECHNOLOGY 2022; 347:126743. [PMID: 35066127 DOI: 10.1016/j.biortech.2022.126743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
Substances harmful to photo-fermentative biological hydrogen production (PFHP) were produced during cellulose hydrolysis. This study aimed to evaluate the effect of by-products (5-hydroxymethylfurfural (5-HMF) and furfural) released from lignocellulose during enzymatic hydrolysis process on PFHP. The exist of 5-HMF inhibited the hydrogen production. However, 0.2 g/L furfural improved the hydrogen production by 19 % compared to no addition (511.6 mL) with a maximum concentration of nitrogenase (109.96 IU/L) at 96 h. Furthermore, a 18.7 % enhancement of hydrogen production was also observed when 0.2 g/L 5-HMF and furfural were mixed at a ratio of 1:1, while decrement of hydrogen production at higher addition was observed as well. Through the scatter matrix analysis, it was concluded that 5-HMF and furfural additives had significant effects on PFHP. This study gave an insight into effect of lignocellulosic by-products on biohydrogen production.
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Affiliation(s)
- Jiabin Yang
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China
| | - Danping Jiang
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China
| | - Xuenan Shui
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China
| | - Tingzhou Lei
- Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
| | - Huan Zhang
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China
| | - Zhiping Zhang
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China
| | - Xueting Zhang
- Institute of Agriculture engineering, Huanghe S & T University, Zhengzhou 450006, China
| | - Shengnan Zhu
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China
| | - Quanguo Zhang
- Key Laboratory of New Materials and Facilities for Rural Renewable Energy (Ministry of Agriculture and Rural Affairs of China), Henan Agricultural University, Zhengzhou 450002, China.
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8
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Ibrahim MF, Talib NN, Alias NH, Bakar INA, Aziz SA, Yee PL. Utilization of agricultural biomass for bio-butanol production. VALUE-CHAIN OF BIOFUELS 2022:235-248. [DOI: 10.1016/b978-0-12-824388-6.00019-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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9
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Cellulosic Butanol Biorefinery: Production of Biobutanol from High Solid Loadings of Sweet Sorghum Bagasse—Simultaneous Saccharification, Fermentation, and Product Recovery. FERMENTATION-BASEL 2021. [DOI: 10.3390/fermentation7040310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Butanol was produced commercially from cornstarch and sugarcane molasses (renewable resources) until 1983, when production of these plants was forced to cease because of unfavorable economics of production caused in part by escalating prices of these feedstocks. During recent years, the focus of research has been on the use of economically available agricultural biomass and residues and cutting-edge science and technology to make butanol production a commercially viable process again. In this study, we produced butanol from sweet sorghum bagasse (SSB) by employing high concentrations of SSB solids and integrated process technology through which simultaneous saccharification, fermentation, and recovery (SSFR) were conducted as one unit operation. The concentrated SSB (16–22% dry wt. basis or 160–220 gL−1) was used to reduce reactor size and potentially reduce fixed and operational costs. Indeed, ABE productivity and yield of 0.21 gL−1h−1 and 0.39 were obtained, respectively, when 160 gL−1 SSB (16%, dry wt.) was used in the SSFR process. In nonintegrated systems, use of >90 gL−1 solid loading is improbable and has not been done until this study.
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10
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Mohammadi Shad Z, Venkitasamy C, Wen Z. Corn distillers dried grains with solubles: Production, properties, and potential uses. Cereal Chem 2021. [DOI: 10.1002/cche.10445] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | | | - Zhiyou Wen
- Food Science and Human Nutrition Department Iowa State University Ames IA USA
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11
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Lu X, Liu X, Hu J, Liu P. Treatment of thin stillage by Aspergillus oryzae and its effect on alcoholic fermentation in syrup liquid. Lett Appl Microbiol 2021; 73:113-122. [PMID: 33817824 DOI: 10.1111/lam.13483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 03/10/2021] [Accepted: 03/29/2021] [Indexed: 11/28/2022]
Abstract
The microbial degradation of thin stillage for environment-friendly treatment has been studied extensively in recent years, and useful compounds in the treated-thin stillage are expected to be utilized in the subsequent fermentation. In this study, an Aspergillus oryzae H18, suitable for growing in thin stillage, was isolated from soil and served to degrade the organic matter in thin stillage, with the increase in pH (from 3·75 to 4·8) and decrease in chemical oxygen demand (COD, 81·3% removal rate). The effect of thin stillage as backset water after degradation of the strain H18 on alcohol production in syrup liquid was investigated. Compared with zero addition of thin stillage, the alcohol yield in mixed syrup liquid increased by 8·6% when the concentration of treated-thin stillage was 20%. After the addition of nutrients at proper concentration (0·5% urea, 1% molasses, 0·25% NaCl, 0·2% NaH2 PO4 , 0·3% MgSO4 and 0·25% CaCl2 ) in thin stillage, the alcohol yield in yeast fermentation was increased by 32·7% when mixed syrup liquid (with 40% thin stillage treated by H18) was employed, in comparison to control group without thin stillage addition. Meanwhile, the fermentation time was shortened, and alcohol production rate was enhanced.
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Affiliation(s)
- Xiaohong Lu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Xiao Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jinrong Hu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Ping Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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12
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Chen Y, Yang Y, Ji X, Zhao R, Li G, Gu Y, Shi A, Jiang W, Zhang Q. The SCIFF-Derived Ranthipeptides Participate in Quorum Sensing in Solventogenic Clostridia. Biotechnol J 2020; 15:e2000136. [PMID: 32713052 DOI: 10.1002/biot.202000136] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 06/25/2020] [Indexed: 12/29/2022]
Abstract
Ranthipeptides, defined as radical non-α thioether-containing peptides, are a newly emerging class of natural products belonging to the ribosomally synthesized and post-translationally modified peptide (RiPP) superfamily. Ranthipeptides are shown to be widespread in the bacterial kingdom, whereas heretofore their biological functions remain completely elusive. In this work, putative ranthipeptides are investigated from two solventogenic clostridia, Clostridium beijerinckii and Clostridium ljungdahlii, which are derived from the so-called six Cys in forty-five residues (SCIFF) family of precursor peptides. A series of analysis show that these two ranthipeptides participate in quorum sensing and controlling cellular metabolism. These results highlight the diverse biological functions of the ever-increasing family of RiPP natural products and showcase the potential to engineer industrially interesting organisms by manipulating their RiPP biosynthetic pathways.
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Affiliation(s)
- Yunliang Chen
- School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang, 212013, China.,Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Yunpeng Yang
- Chinese Academy of Sciences (CAS) Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai, 200032, China.,Institute of Neuroscience, Chinese Academy of Sciences (CAS) Key Laboratory of Primate Neurobiology, CAS Center for Excellence in Brain Science and Intelligence Technology, CAS, Shanghai Institutes for Biological Sciences, Shanghai, 200031, China
| | - Xinjian Ji
- Department of Chemistry, Fudan University, Shanghai, 200433, China
| | - Ran Zhao
- Chinese Academy of Sciences (CAS) Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai, 200032, China
| | - Guoquan Li
- School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yang Gu
- Chinese Academy of Sciences (CAS) Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai, 200032, China
| | - Aiping Shi
- School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Weihong Jiang
- Chinese Academy of Sciences (CAS) Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai, 200032, China
| | - Qi Zhang
- Department of Chemistry, Fudan University, Shanghai, 200433, China
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13
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Han S, Kim Y, Karanjikar M, San KY, Bennett GN. Genetic sensor-regulators functional in Clostridia. J Ind Microbiol Biotechnol 2020; 47:609-620. [DOI: 10.1007/s10295-020-02303-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 08/18/2020] [Indexed: 11/30/2022]
Abstract
Abstract
This study addressed the functionality of genetic circuits carrying natural regulatory elements of Clostridium acetobutylicum ATCC 824 in the presence of the respective inducer molecules. Specifically, promoters and their regulators involved in diverse carbon source utilization were characterized using mCherryOpt or beta-galactosidase as a reporter. Consequently, most of the genetic circuits tested in this study were functional in Clostridium acetobutylicum ATCC 824 in the presence of an inducer, leading to the expression of reporter proteins. These genetic sensor-regulators were found to be transferable to another Clostridium species, such as Clostridium beijerinckii NCIMB 8052. The gradual expression of reporter protein was observed as a function of the carbohydrates of interest. A xylose-inducible promoter allows a titratable and robust expression of a reporter protein with stringency and efficacy. This xylose-inducible circuit was seen to enable induction of the expression of reporter proteins in the presence of actual sugar mixtures incorporated in woody hydrolysate wherein glucose and xylose are present as predominant carbon sources.
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Affiliation(s)
- SongI Han
- grid.21940.3e 0000 0004 1936 8278 Department of Bioengineering Rice University 77005 Houston TX USA
| | - Younghwan Kim
- grid.427405.0 Technology Holding LLC 84119 West Valley City UT USA
| | | | - Ka-Yiu San
- grid.21940.3e 0000 0004 1936 8278 Department of Bioengineering Rice University 77005 Houston TX USA
- grid.21940.3e 0000 0004 1936 8278 Department of Chemical and Biomolecular Engineering Rice University 77005 Houston TX USA
| | - George N Bennett
- grid.21940.3e 0000 0004 1936 8278 Department of Chemical and Biomolecular Engineering Rice University 77005 Houston TX USA
- grid.21940.3e 0000 0004 1936 8278 Department of BioSciences Rice University 77005 Houston TX USA
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14
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Iram A, Cekmecelioglu D, Demirci A. Distillers’ dried grains with solubles (DDGS) and its potential as fermentation feedstock. Appl Microbiol Biotechnol 2020; 104:6115-6128. [DOI: 10.1007/s00253-020-10682-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 05/06/2020] [Accepted: 05/12/2020] [Indexed: 01/08/2023]
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15
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Wang F, Dong Y, Cheng X, Xie H, Song A, Zhang Z. Effect of detoxification methods on ABE production from corn stover hydrolysate by Clostridium acetobutylicum CICC 8016. Biotechnol Appl Biochem 2020; 67:790-798. [PMID: 31903642 DOI: 10.1002/bab.1881] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this study, effects of different single biomass derived inhibitors on acetone-butanol-ethanol (ABE) production by Clostridium acetobutylicum CICC 8016 were first investigated. The results showed that formic acid, coumaric acid, and furfural at 0.5 g/L (sodium formate equivalent) inhibited ABE production. Furthermore, corn stover hydrolysate media were prepared following dilute acid pretreatment, enzymatic hydrolysis, and detoxification with different methods. Among overliming, steam stripping, acetone-ethyl ether extraction, and ion exchange with five anion resins, adsorption with resin D301 showed the highest efficiency for inhibitor removal (99-100% of phenolics and 87-99% of sugar degradation products). Without detoxification, ABE production was lower than 1.0 g/L from 28.1 g/L sugars whereas ABE production with medium detoxified by D301 resin achieved higher ABE concentrations and yields than control with synthetic medium. Correlation analysis further revealed that formic acid, coumaric acid, and total phenolics were the major compounds inhibiting ABE production. The results also showed that the single detoxification method was sufficient to detoxify the hydrolysate for ABE production at the pretreatment conditions used in this study.
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Affiliation(s)
- Fengqin Wang
- College of Life Science, Henan Agricultural University, Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Zhengzhou, People's Republic of China
| | - Yuheng Dong
- College of Life Science, Henan Agricultural University, Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Zhengzhou, People's Republic of China
| | - Xiang Cheng
- College of Life Science, Henan Agricultural University, Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Zhengzhou, People's Republic of China
| | - Hui Xie
- College of Life Science, Henan Agricultural University, Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Zhengzhou, People's Republic of China
| | - Andong Song
- College of Life Science, Henan Agricultural University, Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Zhengzhou, People's Republic of China
| | - Zhanying Zhang
- Centre for Tropical Crops and Biocommodities, Queensland University of Technology, Brisbane, Australia
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Techno-Economic Analysis (TEA) of Different Pretreatment and Product Separation Technologies for Cellulosic Butanol Production from Oil Palm Frond. ENERGIES 2020. [DOI: 10.3390/en13010181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Among the driving factors for the high production cost of cellulosic butanol lies the pretreatment and product separation sections, which often demand high amounts of energy, chemicals, and water. In this study, techno-economic analysis of several pretreatments and product separation technologies were conducted and compared. Among the pretreatment technologies evaluated, low-moisture anhydrous ammonia (LMAA) pretreatment has shown notable potential with a pretreatment cost of $0.16/L butanol. Other pretreatment technologies evaluated were autohydrolysis, soaking in aqueous ammonia (SAA), and soaking in sodium hydroxide solution (NaOH) with pretreatment costs of $1.98/L, $3.77/L, and $0.61/L, respectively. Evaluation of different product separation technologies for acetone-butanol-ethanol (ABE) fermentation process have shown that in situ stripping has the lowest separation cost, which was $0.21/L. Other product separation technologies tested were dual extraction, adsorption, and membrane pervaporation, with the separation costs of $0.38/L, $2.25/L, and $0.45/L, respectively. The evaluations have shown that production of cellulosic butanol using combined LMAA pretreatment and in situ stripping or with dual extraction recorded among the lowest butanol production cost. However, dual extraction model has a total solvent productivity of approximately 6% higher than those of in situ stripping model.
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17
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Life-Cycle Assessment (LCA) of Different Pretreatment and Product Separation Technologies for Butanol Bioprocessing from Oil Palm Frond. ENERGIES 2019. [DOI: 10.3390/en13010155] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Environmental impact assessment is a crucial aspect of biofuels production to ensure that the process generates emissions within the designated limits. In typical cellulosic biofuel production process, the pretreatment and downstream processing stages were reported to require a high amount of chemicals and energy, thus generating high emissions. Cellulosic butanol production while using low moisture anhydrous ammonia (LMAA) pretreatment was expected to have a low chemical, water, and energy footprint, especially when the process was combined with more efficient downstream processing technologies. In this study, the quantification of environmental impact potentials from cellulosic butanol production plants was conducted with modeled different pretreatment and product separation approaches. The results have shown that LMAA pretreatment possessed a potential for commercialization by having low energy requirements when compared to the other modeled pretreatments. With high safety measures that reduce the possibility of anhydrous ammonia leaking to the air, LMAA pretreatment resulted in GWP of 5.72 kg CO2 eq./L butanol, ecotoxicity potential of 2.84 × 10−6 CTU eco/L butanol, and eutrophication potential of 0.011 kg N eq./L butanol. The lowest energy requirement in biobutanol production (19.43 MJ/L), as well as better life-cycle energy metrics performances (NEV of 24.69 MJ/L and NER of 2.27) and environmental impacts potentials (GWP of 3.92 kg N eq./L butanol and ecotoxicity potential of 2.14 × 10−4 CTU eco/L butanol), were recorded when the LMAA pretreatment was combined with the membrane pervaporation process in the product separation stage.
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18
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Lin M, Tan J, Xu Z, Huang J, Tian Y, Chen B, Wu Y, Tong Y, Zhu Y. Computational design of enhanced detoxification activity of a zearalenone lactonase from Clonostachys rosea in acidic medium. RSC Adv 2019; 9:31284-31295. [PMID: 35527979 PMCID: PMC9072336 DOI: 10.1039/c9ra04964a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/27/2019] [Indexed: 11/21/2022] Open
Abstract
Computational design of pH-activity profiles for enzymes is of great importance in industrial applications. In this research, a computational strategy was developed to engineer the pH-activity profile of a zearalenone lactonase (ZHD101) from Clonostachys rosea to promote its activity in acidic medium. The active site pK a values of ZHD101 were computationally designed by introducing positively charged lysine mutations on the enzyme surface, and the experimental results showed that two variants, M2(D157K) and M9(E171K), increased the catalytic efficiencies of ZHD101 modestly under acidic conditions. Moreover, two variants, M8(D133K) and M9(E171K), were shown to increase the turnover numbers by 2.73 and 2.06-fold with respect to wild type, respectively, though their apparent Michaelis constants were concomitantly increased. These results imply that the active site pK a value change might affect the pH-activity profile of the enzyme. Our computational strategy for pH-activity profile engineering considers protein stability; therefore, limited experimental validation is needed to discover beneficial mutations under shifted pH conditions.
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Affiliation(s)
- Min Lin
- Department of Chemical Engineering, Tsinghua University Beijing 100084 China
| | - Jian Tan
- Nutrition & Health Research Institute, China National Cereals, Oils and Foodstuffs Corporation (COFCO) Beijing 102209 China
- Beijing Key Lab of Nutrition, Health and Food Safety Beijing 102209 China
- Beijing Livestock Products Quality and Safety Source Control Engineering Technology Research Center Beijing 102209 China
| | - Zhaobin Xu
- Department of Chemical Engineering, Tsinghua University Beijing 100084 China
| | - Jin Huang
- Nutrition & Health Research Institute, China National Cereals, Oils and Foodstuffs Corporation (COFCO) Beijing 102209 China
- Beijing Key Lab of Nutrition, Health and Food Safety Beijing 102209 China
- Beijing Livestock Products Quality and Safety Source Control Engineering Technology Research Center Beijing 102209 China
| | - Ye Tian
- Department of Chemical Engineering, Tsinghua University Beijing 100084 China
| | - Bo Chen
- Nutrition & Health Research Institute, China National Cereals, Oils and Foodstuffs Corporation (COFCO) Beijing 102209 China
- Beijing Key Lab of Nutrition, Health and Food Safety Beijing 102209 China
- Beijing Livestock Products Quality and Safety Source Control Engineering Technology Research Center Beijing 102209 China
| | - Yandong Wu
- National Engineering Research Center of Corn Deep Processing Changchun 130033 Jilin China
| | - Yi Tong
- National Engineering Research Center of Corn Deep Processing Changchun 130033 Jilin China
| | - Yushan Zhu
- Department of Chemical Engineering, Tsinghua University Beijing 100084 China
- MOE Key Lab of Industrial Biocatalysis, Tsinghua University Beijing 100084 China
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19
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Birgen C, Dürre P, Preisig HA, Wentzel A. Butanol production from lignocellulosic biomass: revisiting fermentation performance indicators with exploratory data analysis. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:167. [PMID: 31297155 PMCID: PMC6598312 DOI: 10.1186/s13068-019-1508-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 06/19/2019] [Indexed: 05/09/2023]
Abstract
After just more than 100 years of history of industrial acetone-butanol-ethanol (ABE) fermentation, patented by Weizmann in the UK in 1915, butanol is again today considered a promising biofuel alternative based on several advantages compared to the more established biofuels ethanol and methanol. Large-scale fermentative production of butanol, however, still suffers from high substrate cost and low product titers and selectivity. There have been great advances the last decades to tackle these problems. However, understanding the fermentation process variables and their interconnectedness with a holistic view of the current scientific state-of-the-art is lacking to a great extent. To illustrate the benefits of such a comprehensive approach, we have developed a dataset by collecting data from 175 fermentations of lignocellulosic biomass and mixed sugars to produce butanol that reported during the past three decades of scientific literature and performed an exploratory data analysis to map current trends and bottlenecks. This review presents the results of this exploratory data analysis as well as main features of fermentative butanol production from lignocellulosic biomass with a focus on performance indicators as a useful tool to guide further research and development in the field towards more profitable butanol manufacturing for biofuel applications in the future.
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Affiliation(s)
- Cansu Birgen
- Department of Chemical Engineering, NTNU, 7491 Trondheim, Norway
| | - Peter Dürre
- Institute of Microbiology and Biotechnology, Ulm University, 89069 Ulm, Germany
| | - Heinz A. Preisig
- Department of Chemical Engineering, NTNU, 7491 Trondheim, Norway
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20
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Shanmugam S, Sun C, Chen Z, Wu YR. Enhanced bioconversion of hemicellulosic biomass by microbial consortium for biobutanol production with bioaugmentation strategy. BIORESOURCE TECHNOLOGY 2019; 279:149-155. [PMID: 30716607 DOI: 10.1016/j.biortech.2019.01.121] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 06/09/2023]
Abstract
As a renewable and sustainable source for next-generation biofuel production, lignocellulosic biomass can be effectively utilized in environmentally friendly manner. In this study, a stable, xylan-utilizing, anaerobic microbial consortium MC1 enriched from mangrove sediments was established, and it was taxonomically identified that the genera Ruminococcus and Clostridium from this community played a crucial role in the substrate utilization. In addition, a butanol-producing Clostridium sp. strain WST was introduced via the bioaugmentation process, which resulted in the conversion of xylan to biobutanol up to 10.8 g/L, significantly improving the butanol yield up to 0.54 g/g by 98-fold. When this system was further applied to other xylan-rich biomass, 1.09 g/L of butanol could be achieved from 20 g/L of corn cob. These results provide another new method to efficiently convert xylan, the main hemicellulose from lignocellulosic biomass into biofuels through a low-cost and eco-friendly manner.
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Affiliation(s)
| | - Chongran Sun
- Department of Biology, Shantou University, Shantou, Guangdong 515063, China
| | - Zichuang Chen
- Department of Biology, Shantou University, Shantou, Guangdong 515063, China
| | - Yi-Rui Wu
- Department of Biology, Shantou University, Shantou, Guangdong 515063, China; STU-UNIVPM Joint Algal Research Center, Shantou University, Shantou, Guangdong 515063, China; Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou, Guangdong 515063, China.
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21
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Liao Z, Guo X, Hu J, Suo Y, Fu H, Wang J. The significance of proline on lignocellulose-derived inhibitors tolerance in Clostridium acetobutylicum ATCC 824. BIORESOURCE TECHNOLOGY 2019; 272:561-569. [PMID: 30396113 DOI: 10.1016/j.biortech.2018.10.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
When lignocellulosic biomass was used for acetone-butanol-ethanol (ABE) fermentation, several lignocellulose-derived inhibitors, which are toxic to Clostridium acetobutylicum, were generated during acid hydrolysis process and seriously hindered the industrialization of lignocellulosic butanol. In this study, an engineered strain 824(proABC) with significantly improved tolerance to multiple lignocellulose-derived inhibitors (formic acid and phenolic compounds) was constructed by strengthening the proline biosynthesis. The engineered strain exhibited more effective synthesis ability of proline and scavenging ability of reactive oxygen species (ROS). Consequently, the butanol produced by 824(proABC) was 1-, 2.4- or 3.4-fold higher than that of the wild type strain when using the undetoxified hydrolysate of soybean straw, rice straw or corn straw as the substrate, respectively. Therefore, enhancing the proline biosynthesis can be used as an effective strategy to improve the tolerance of C. acetobutylicum to multiple lignocellulose-derived inhibitors, and 824(proABC) has great potential to produce butanol from undetoxified lignocellulosic hydrolysates.
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Affiliation(s)
- Zhengping Liao
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Xiaolong Guo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Jialei Hu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Yukai Suo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Hongxin Fu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China.
| | - Jufang Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
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22
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Qureshi N, Harry-O'kuru R, Liu S, Saha B. Yellow top (Physaria fendleri) presscake: A novel substrate for butanol production and reduction in environmental pollution. Biotechnol Prog 2018; 35:e2767. [PMID: 30565888 DOI: 10.1002/btpr.2767] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 11/23/2018] [Accepted: 12/17/2018] [Indexed: 11/07/2022]
Abstract
Yellow Top (Physaria fendleri) is a plant that belongs to the mustard family. This plant is used to produce seeds that are rich in hydroxy oil. After extraction of oil, the presscake is land filled. The seedcake is rich in polymeric sugars and can be used for various bioconversions. For the present case, the seedcake or presscake was hydrolyzed with dilute (0.50% [v/v]) H2 SO4 and enzymes to release sugars including glucose, xylose, galactose, arabinose, and mannose. Then, the hydrolyzate was used to produce acetone-butanol-ethanol (ABE). Using 100 gL-1 presscake (prior to pretreatment), 19.22 gL-1 of ABE was successfully produced of which butanol was the major product. In this process, an ABE productivity of 0.48 gL-1 h-1 was obtained. These results are superior to glucose fermentation to produce ABE in which an ABE productivity of 0.42 gL-1 h-1 was obtained. Use of Yellow Top to produce butanol has the following advantages: (i) it is an economic feedstock and is expected to produce butanol economically; (ii) it avoids pollution concerns when not land filled; and (iii) rate of ABE production is not inhibited when fermented this substrate. It is suggested that the potential of this feedstock be further explored by optimizing process parameters for this valuable fermentation. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2767, 2019.
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Affiliation(s)
- Nasib Qureshi
- Bioenergy Research Unit, United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Peoria, IL, 61604
| | - Rogers Harry-O'kuru
- Bio-Oils Research Unit, United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Peoria, IL, 61604
| | - Siqing Liu
- Renewable Product Technology Research Unit, United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Peoria, IL, 61604
| | - Badal Saha
- Bioenergy Research Unit, United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Peoria, IL, 61604
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23
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Amiri H, Karimi K. Pretreatment and hydrolysis of lignocellulosic wastes for butanol production: Challenges and perspectives. BIORESOURCE TECHNOLOGY 2018; 270:702-721. [PMID: 30195696 DOI: 10.1016/j.biortech.2018.08.117] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/27/2018] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
Butanol is acknowledged as a drop-in biofuel that can be used in the existing transportation infrastructure, addressing the needs for sustainable liquid fuel. However, before becoming a thoughtful alternative for fossil fuel, butanol should be produced efficiently from a widely-available, renewable, and cost-effective source. In this regard, lignocellulosic materials, the main component of organic wastes from agriculture, forestry, municipalities, and even industries seems to be the most promising source. The butanol-producing bacteria, i.e., Clostridia sp., can uptake a wide range of hexoses, pentoses, and oligomers obtained from hydrolysis of cellulose and hemicellulose content of lignocelluloses. The present work is dedicated to reviewing different processes containing pretreatment and hydrolysis of hemicellulose and cellulose developed for preparing fermentable hydrolysates for biobutanol production.
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Affiliation(s)
- Hamid Amiri
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan 81746-73441, Iran; Environmental Research Institute, University of Isfahan, Isfahan 81746-73441, Iran.
| | - Keikhosro Karimi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Industrial Biotechnology Group, Research Institute for Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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24
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Fermentable Sugar Production from a Coffee Processing By-product after Deep Eutectic Solvent Pretreatment. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biteb.2018.10.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Servinsky MD, Renberg RL, Perisin MA, Gerlach ES, Liu S, Sund CJ. Arabinose-Induced Catabolite Repression as a Mechanism for Pentose Hierarchy Control in Clostridium acetobutylicum ATCC 824. mSystems 2018; 3:e00064-18. [PMID: 30374459 PMCID: PMC6199471 DOI: 10.1128/msystems.00064-18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 09/13/2018] [Indexed: 12/27/2022] Open
Abstract
Bacterial fermentation of carbohydrates from sustainable lignocellulosic biomass into commodity chemicals by the anaerobic bacterium Clostridium acetobutylicum is a promising alternative source to fossil fuel-derived chemicals. Recently, it was demonstrated that xylose is not appreciably fermented in the presence of arabinose, revealing a hierarchy of pentose utilization in this organism (L. Aristilde, I. A. Lewis, J. O. Park, and J. D. Rabinowitz, Appl Environ Microbiol 81:1452-1462, 2015, https://doi.org/10.1128/AEM.03199-14). The goal of the current study is to characterize the transcriptional regulation that occurs and perhaps drives this pentose hierarchy. Carbohydrate consumption rates showed that arabinose, like glucose, actively represses xylose utilization in cultures fermenting xylose. Further, arabinose addition to xylose cultures led to increased acetate-to-butyrate ratios, which indicated a transition of pentose catabolism from the pentose phosphate pathway to the phosphoketolase pathway. Transcriptome sequencing (RNA-Seq) confirmed that arabinose addition to cells actively growing on xylose resulted in increased phosphoketolase (CA_C1343) mRNA levels, providing additional evidence that arabinose induces this metabolic switch. A significant overlap in differentially regulated genes after addition of arabinose or glucose suggested a common regulation mechanism. A putative open reading frame (ORF) encoding a potential catabolite repression phosphocarrier histidine protein (Crh) was identified that likely participates in the observed transcriptional regulation. These results substantiate the claim that arabinose is utilized preferentially over xylose in C. acetobutylicum and suggest that arabinose can activate carbon catabolite repression via Crh. Furthermore, they provide valuable insights into potential mechanisms for altering pentose utilization to modulate fermentation products for chemical production. IMPORTANCE Clostridium acetobutylicum can ferment a wide variety of carbohydrates to the commodity chemicals acetone, butanol, and ethanol. Recent advances in genetic engineering have expanded the chemical production repertoire of C. acetobutylicum using synthetic biology. Due to its natural properties and genetic engineering potential, this organism is a promising candidate for converting biomass-derived feedstocks containing carbohydrate mixtures to commodity chemicals via natural or engineered pathways. Understanding how this organism regulates its metabolism during growth on carbohydrate mixtures is imperative to enable control of synthetic gene circuits in order to optimize chemical production. The work presented here unveils a novel mechanism via transcriptional regulation by a predicted Crh that controls the hierarchy of carbohydrate utilization and is essential for guiding robust genetic engineering strategies for chemical production.
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Affiliation(s)
| | | | | | | | - Sanchao Liu
- U.S. Army Research Laboratory, RDRL-SEE-B, Adelphi, Maryland, USA
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26
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Qureshi N, Saha BC, Klasson KT, Liu S. High solid fed‐batch butanol fermentation with simultaneous product recovery: Part II—process integration. Biotechnol Prog 2018; 34:967-972. [DOI: 10.1002/btpr.2643] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/13/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Nasib Qureshi
- USDAARS, NCAUR, Bioenergy Research Unit, 1815 N University StreetPeoria IL61604, USA
| | - Badal C Saha
- USDAARS, NCAUR, Bioenergy Research Unit, 1815 N University StreetPeoria IL61604, USA
| | - K. Thomas Klasson
- USDA, ARS, Southern Regional Research Center (SRRC), Commodity Utilization Research Unit, 1100 Robert E. Lee BlvdNew Orleans LA70124, USA
| | - Siqing Liu
- USDA, ARS, NCAUR, Renewable Product Technology Research Unit, 1815 N University StreetPeoria IL61604, USA
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27
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Chen WH, Zeng YR. Mathematical model to appraise the inhibitory effect of phenolic compounds derived from lignin for biobutanol production. BIORESOURCE TECHNOLOGY 2018; 261:44-51. [PMID: 29653333 DOI: 10.1016/j.biortech.2018.04.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/30/2018] [Accepted: 04/02/2018] [Indexed: 06/08/2023]
Abstract
This study aimed to establish a mathematical modeling to evaluate the inhibitory effect of phenolic derivatives on acetone-butanol-ethanol (ABE) fermentation by Clostridium saccharoperbutylacetonicum N1-4. Vanillin, 4-hydroxybenzoic acid, and syringaldehyde were selected to represent guaiacyl, hydroxyphenyl, and syringyl phenols, respectively, to be examined in a series of fed-batch experiments. Results show the presence of phenolic derivatives blocked the pathway of the assimilation of organic acids and reduced cell growth and glucose utilization. The inhibition model projected that the levels of 0.13, 0.14, and 0.04 g L-1 for vanillin, 4-hydroxybenzoic acid, and syringaldehyde, respectively, resulted in 25% inhibition of butanol production, whereas 100% inhibition was predicted at the levels of 4.94, 4.37, and 4.20 g L-1 for vanillin, 4-hydroxybenzoic acid, and syringaldehyde, respectively. Syringaldehyde was more toxic than the other two compounds. The established model described that the phenolic compounds derived from different phenyl propane monomers of lignin severely obstructed biobutanol production.
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Affiliation(s)
- Wen-Hsing Chen
- Department of Environmental Engineering, National Ilan University, Yilan 260, Taiwan.
| | - Yan-Ru Zeng
- Department of Environmental Engineering, National Ilan University, Yilan 260, Taiwan
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28
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Guan W, Shi S, Blersch D. Effects of Tween 80 on fermentative butanol production from alkali-pretreated switchgrass. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.03.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Yang Y, Nie X, Jiang Y, Yang C, Gu Y, Jiang W. Metabolic regulation in solventogenic clostridia: regulators, mechanisms and engineering. Biotechnol Adv 2018; 36:905-914. [DOI: 10.1016/j.biotechadv.2018.02.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/05/2018] [Accepted: 02/20/2018] [Indexed: 12/31/2022]
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30
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Sedlar K, Koscova P, Vasylkivska M, Branska B, Kolek J, Kupkova K, Patakova P, Provaznik I. Transcription profiling of butanol producer Clostridium beijerinckii NRRL B-598 using RNA-Seq. BMC Genomics 2018; 19:415. [PMID: 29843608 PMCID: PMC5975590 DOI: 10.1186/s12864-018-4805-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 05/18/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Thinning supplies of natural resources increase attention to sustainable microbial production of bio-based fuels. The strain Clostridium beijerinckii NRRL B-598 is a relatively well-described butanol producer regarding its genotype and phenotype under various conditions. However, a link between these two levels, lying in the description of the gene regulation mechanisms, is missing for this strain, due to the lack of transcriptomic data. RESULTS In this paper, we present a transcription profile of the strain over the whole fermentation using an RNA-Seq dataset covering six time-points with the current highest dynamic range among solventogenic clostridia. We investigated the accuracy of the genome sequence and particular genome elements, including pseudogenes and prophages. While some pseudogenes were highly expressed, all three identified prophages remained silent. Furthermore, we identified major changes in the transcriptional activity of genes using differential expression analysis between adjacent time-points. We identified functional groups of these significantly regulated genes and together with fermentation and cultivation kinetics captured using liquid chromatography and flow cytometry, we identified basic changes in the metabolism of the strain during fermentation. Interestingly, C. beijerinckii NRRL B-598 demonstrated different behavior in comparison with the closely related strain C. beijerinckii NCIMB 8052 in the latter phases of cultivation. CONCLUSIONS We provided a complex analysis of the C. beijerinckii NRRL B-598 fermentation profile using several technologies, including RNA-Seq. We described the changes in the global metabolism of the strain and confirmed the uniqueness of its behavior. The whole experiment demonstrated a good reproducibility. Therefore, we will be able to repeat the experiment under selected conditions in order to investigate particular metabolic changes and signaling pathways suitable for following targeted engineering.
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Affiliation(s)
- Karel Sedlar
- Department of Biomedical Engineering, Brno University of Technology, Technicka 12, 616 00 Brno, Czechia
| | - Pavlina Koscova
- Department of Biomedical Engineering, Brno University of Technology, Technicka 12, 616 00 Brno, Czechia
| | - Maryna Vasylkivska
- Department of Biotechnology, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague, Czechia
| | - Barbora Branska
- Department of Biotechnology, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague, Czechia
| | - Jan Kolek
- Department of Biotechnology, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague, Czechia
- Institute of Aquaculture and Protection of Waters, University of South Bohemia in České Budějovice, Na Sádkách 1780, 370 05 České Budějovice, Czechia
| | - Kristyna Kupkova
- Department of Biomedical Engineering, Brno University of Technology, Technicka 12, 616 00 Brno, Czechia
- Department of Biochemistry and Molecular Genetics, University of Virginia Health System, Charlottesville, VA 22908 USA
| | - Petra Patakova
- Department of Biotechnology, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague, Czechia
| | - Ivo Provaznik
- Department of Biomedical Engineering, Brno University of Technology, Technicka 12, 616 00 Brno, Czechia
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Ye Z, Song J, Zhu E, Song X, Chen X, Hong X. Alginate Adsorbent Immobilization Technique Promotes Biobutanol Production by Clostridium acetobutylicum Under Extreme Condition of High Concentration of Organic Solvent. Front Microbiol 2018; 9:1071. [PMID: 29910776 PMCID: PMC5992427 DOI: 10.3389/fmicb.2018.01071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 05/04/2018] [Indexed: 11/17/2022] Open
Abstract
In Acetone-Butanol-Ethanol fermentation, bacteria should tolerate high concentrations of solvent products, which inhibit bacteria growth and limit further increase of solvents to more than 20 g/L. Moreover, this limited solvent concentration significantly increases the cost of solvent separation through traditional approaches. In this study, alginate adsorbent immobilization technique was successfully developed to assist in situ extraction using octanol which is effective in extracting butanol but presents strong toxic effect to bacteria. The adsorbent improved solvent tolerance of Clostridium acetobutylicum under extreme condition of high concentration of organic solvent. Using the developed technique, more than 42% of added bacteria can be adsorbed to the adsorbent. Surface area of the adsorbent was more than 10 times greater than sodium alginate. Scanning electron microscope image shows that an abundant amount of pore structure was successfully developed on adsorbents, promoting bacteria adsorption. In adsorbent assisted ABE fermentation, there was 21.64 g/L butanol in extracting layer compared to negligible butanol produced with only the extractant but without the adsorbent, for the reason that adsorbent can reduce damaging exposure of C. acetobutylicum to octanol. The strategy can improve total butanol production with respect to traditional culture approach by more than 2.5 fold and save energy for subsequent butanol recovery, which effects can potentially make the biobutanol production more economically practical.
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Affiliation(s)
- Zhuoliang Ye
- School of Chemical Engineering, Fuzhou University, Fuzhou, China
| | - Jingyi Song
- School of Chemical Engineering, Fuzhou University, Fuzhou, China
| | - Enhao Zhu
- School of Chemical Engineering, Fuzhou University, Fuzhou, China
| | - Xin Song
- School of Chemical Engineering, Fuzhou University, Fuzhou, China
| | - Xiaohui Chen
- School of Chemical Engineering, Fuzhou University, Fuzhou, China.,National Engineering Research Center for Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, China
| | - Xiaoting Hong
- Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, China
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32
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Marine algal carbohydrates as carbon sources for the production of biochemicals and biomaterials. Biotechnol Adv 2018; 36:798-817. [DOI: 10.1016/j.biotechadv.2018.02.006] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 02/04/2018] [Accepted: 02/06/2018] [Indexed: 12/30/2022]
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33
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Suo Y, Fu H, Ren M, Yang X, Liao Z, Wang J. Butyric acid production from lignocellulosic biomass hydrolysates by engineered Clostridium tyrobutyricum overexpressing Class I heat shock protein GroESL. BIORESOURCE TECHNOLOGY 2018; 250:691-698. [PMID: 29220814 DOI: 10.1016/j.biortech.2017.11.059] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 11/17/2017] [Accepted: 11/18/2017] [Indexed: 06/07/2023]
Abstract
Lignocellulosic biomass is the most abundant and renewable substrate for biological fermentation, but the inhibitors present in the lignocellulosic hydrolysates could severely inhibit the cell growth and productivity of industrial strains. This study confirmed that overexpressing of native groESL in Clostridium tyrobutyricum could significantly improve its tolerance to lignocellulosic hydrolysate-derived inhibitors, especially for phenolic compounds. Consequently, ATCC 25755/groESL showed a better performance in butyric acid fermentation with hydrolysates of corn cob, corn straw, rice straw, wheat straw, soybean hull and soybean straw, respectively. When corn straw and rice straw hydrolysates, which showed strong toxicity to C. tyrobutyricum, were used as the substrates, 29.6 g/L and 30.1 g/L butyric acid were obtained in batch fermentation, increased by 26.5% and 19.4% as compared with the wild-type strain, respectively. And more importantly, the butyric acid productivity reached 0.31 g/L·h (vs. 0.20-0.21 g/L·h for the wild-type strain) due to the shortened lag phase.
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Affiliation(s)
- Yukai Suo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Hongxin Fu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Mengmeng Ren
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Xitong Yang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Zhengping Liao
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Jufang Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
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34
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Guan W, Xu G, Duan J, Shi S. Acetone–Butanol–Ethanol Production from Fermentation of Hot-Water-Extracted Hemicellulose Hydrolysate of Pulping Woods. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b03953] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenjian Guan
- Department
of Chemical Engineering and ‡Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Guomin Xu
- Department
of Chemical Engineering and ‡Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Jingran Duan
- Department
of Chemical Engineering and ‡Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Suan Shi
- Department
of Chemical Engineering and ‡Department of Biosystems Engineering, Auburn University, Auburn, Alabama 36849, United States
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35
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Jiang K, Kuang H, Qin T, Song M, Zhou J, Yang P, Zhuang W, Ying H, Wu J. Recovery of monosaccharides from dilute acid corncob hydrolysate by nanofiltration: modeling and optimization. RSC Adv 2018; 8:12672-12683. [PMID: 35541275 PMCID: PMC9079360 DOI: 10.1039/c8ra00236c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 03/24/2018] [Indexed: 11/26/2022] Open
Abstract
In this work nanofiltration technology has been employed for removal of inhibitors and recovery of monosaccharides from dilute acid lignocellulose hydrolysates. The influences of feed solution pH, permeate flux, and Na2SO4 concentration on the rejection of monosaccharides and inhibitors were investigated. The results showed that the pH for the separation of carboxylic acids and furans from monosaccharides should be as low as possible. With increase of Na2SO4 concentration carboxylic acid and furan rejection decreased. Subsequently, the Donnan steric pore and dielectric exclusion model coupled with mass balance was used to predict the rejection of solutes at different permeate fluxes. In order to select a suitable permeate flux and operating time, multi-objective optimization was carried out to obtain the maximum total inhibitor removal efficiency, the maximum monosaccharide recovery rate, and the minimum water consumption. The optimal operating conditions were then verified using the real hydrolysate as feed solutions. More specifically, for the treatment of 6 L of a hydrolysate solution, 13 L of water and a treatment time of 35 min were required. This process allowed the removal of 90% inhibitors, while 93.55% glucose, 90.75% xylose, and 90.53% arabinose were recovered. Finally, a batch column equipped with a strong acid cation exchange resin was employed to recover the monosaccharides from the hydrolysate. Using water as an eluent, 95.37% of the sulfuric acid and 94.87% of the monosaccharides were recovered. In all, we demonstrated that the combination of nanofiltration with electrolyte exclusion chromatography is a promising integrated process for the recovery of monosaccharides and inorganic acids from dilute acid corncob hydrolysates. In this work Multi-objective optimization has been employed to obtain the optimal permeate flux (jv) and operating time (t) during the diananofiltration detoxification of dilute acid corncob hydrolysate process.![]()
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Affiliation(s)
- Kangkang Jiang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Han Kuang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Taotao Qin
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Mingkai Song
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Jingwei Zhou
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Pengpeng Yang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Wei Zhuang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Hanjie Ying
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
| | - Jinglan Wu
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
- National Engineering Technique Research Center for Biotechnology
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36
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Seo SO, Lu T, Jin YS, Blaschek HP. Development of an oxygen-independent flavin mononucleotide-based fluorescent reporter system in Clostridium beijerinckii and its potential applications. J Biotechnol 2017; 265:119-126. [PMID: 29158189 DOI: 10.1016/j.jbiotec.2017.11.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 11/02/2017] [Accepted: 11/06/2017] [Indexed: 12/21/2022]
Abstract
Clostridium beijerinckii is a predominant solventogenic clostridia with great attraction for renewable liquid biofuel and biochemical production. Metabolic engineering and synthetic biology can be employed to engineer the strain toward desirable phenotypes. However, current limited information such as promoter strength and gene regulation may hinder the efficient engineering of the strain. To investigate genetic information and complex cellular bioprocesses of C. beijerinckii, an in vivo fluorescence reporter system can be employed. In general, green fluorescence protein (GFP) and relative analogs have been widely used as real-time reporters. However, GFP-family proteins require molecular oxygen for fluorescence maturation. Considering the strict anaerobic growth requirement of the clostridia, an oxygen-independent fluorescence reporter such as a flavin mononucleotide-based fluorescent protein (FbFP) can be used as an alternative fluorescence reporter. In this study, we synthesized and expressed the codon-optimized FbFP gene for C. beijerinckii (CbFbFP) based on the nucleotide sequence of Bacillus subtilis YtvA variant EcFbFP in C. beijerinckii NCIMB 8052 wild-type. Protein expression and in vivo fluorescence of CbFbFP in C. beijeirnckii were confirmed under anaerobic growth conditions. Through fluorescence-activated cell sorting (FACS), we isolated the bright cells from the heterogenous population of C. beijerinckii cells expressing CbFbFP. Several mutations were found in the isolated plasmid which may be responsible for the high-level expression of CbFbFP in C. beijerinckii. The mutant plasmid and CbFbFP reporter were further utilized for strain selection, real-time fluorescence measurement, population analysis, and metabolic engineering in this study.
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Affiliation(s)
- Seung-Oh Seo
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Ting Lu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Bioengineering and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Hans P Blaschek
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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37
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Xiao C, Fan W, Du S, Liu L, Wang C, Guo M, Zhang L, Zhang M, Yu L. A novel glycosylated solution from Dioscorea zingiberensis C.H. Wright significantly improves the solvent productivity of Clostridium beijerinckii. BIORESOURCE TECHNOLOGY 2017; 241:317-324. [PMID: 28577480 DOI: 10.1016/j.biortech.2017.03.176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/25/2017] [Accepted: 03/27/2017] [Indexed: 06/07/2023]
Abstract
The economics of bio-solvent production are largely dependent on the cost of the fermentation substrate. Dioscorea zingiberensis C.H. Wright (DZW), the main raw material used to produce saponin, contains 13-18% starch which can be directly saccharified to a saccharification liquid of DZW starch (SLDS) that contains abundant nutrients. In this study, the water-soluble micromolecule compounds in SLDS were quantified through 1H NMR. Using SLDS as the substrate to conduct ABE fermentation by Clostridium beijerinckii, the fermentation cycle was shortened 24h, the maximum biomass and consumption rate of the glucose significantly increased, and the productivity of total solvents were increased by 0.244±0.010g/L/h compared to standard P2 medium. Expression analysis of genes encoding key enzymes involved in acetone and butanol production and glucose consumption showed that they were induced by SLDS. Taken together, SLDS is a useful and renewable glycosylated solution for ABE fermentation.
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Affiliation(s)
- Chuan Xiao
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wei Fan
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
| | - Shengjie Du
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Laizhuang Liu
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Changli Wang
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Mengzhen Guo
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Liwei Zhang
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Meng Zhang
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Longjiang Yu
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Key Laboratory of Molecular Biophysics Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China.
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38
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Abd-Alla MH, Zohri ANA, El-Enany AWE, Ali SM. WITHDRAWN: Conversion of food processing wastes to biofuel using Clostridia. Anaerobe 2017:S1075-9964(17)30141-5. [PMID: 28679108 DOI: 10.1016/j.anaerobe.2017.06.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 06/30/2017] [Indexed: 11/17/2022]
Abstract
This article has been withdrawn: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been withdrawn at the request of the editor and publisher. The publisher regrets that an error occurred which led to the premature publication of this paper. This error bears no reflection on the article or its authors. The publisher apologizes to the authors and the readers for this unfortunate error.
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Affiliation(s)
- Mohamed Hemida Abd-Alla
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Abdel-Naser Ahmed Zohri
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | | | - Shimaa Mohamed Ali
- Botany Department, Faculty of Science, New Valley Branch, Assiut University, 72511, El-Kharja, Egypt
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39
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Ferone M, Raganati F, Olivieri G, Salatino P, Marzocchella A. Biosuccinic Acid from Lignocellulosic-Based Hexoses and Pentoses by Actinobacillus succinogenes: Characterization of the Conversion Process. Appl Biochem Biotechnol 2017; 183:1465-1477. [DOI: 10.1007/s12010-017-2514-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/12/2017] [Indexed: 11/27/2022]
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40
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Li H, Xiong L, Chen X, Wang C, Qi G, Huang C, Luo M, Chen X. Enhanced enzymatic hydrolysis and acetone-butanol-ethanol fermentation of sugarcane bagasse by combined diluted acid with oxidate ammonolysis pretreatment. BIORESOURCE TECHNOLOGY 2017; 228:257-263. [PMID: 28081523 DOI: 10.1016/j.biortech.2016.12.119] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 12/30/2016] [Accepted: 12/31/2016] [Indexed: 05/24/2023]
Abstract
This study aims to propose a biorefinery pretreatment technology for the bioconversion of sugarcane bagasse (SB) into biofuels and N-fertilizers. Performance of diluted acid (DA), aqueous ammonia (AA), oxidate ammonolysis (OA) and the combined DA with AA or OA were compared in SB pretreatment by enzymatic hydrolysis, structural characterization and acetone-butanol-ethanol (ABE) fermentation. Results indicated that DA-OA pretreatment improves the digestibility of SB by sufficiently hydrolyzing hemicellulose into fermentable monosaccharides and oxidating lignin into soluble N-fertilizer with high nitrogen content (11.25%) and low C/N ratio (3.39). The enzymatic hydrolysates from DA-OA pretreated SB mainly composed of glucose was more suitable for the production of ABE solvents than the enzymatic hydrolysates from OA pretreated SB containing high ratio of xylose. The fermentation of enzymatic hydrolysates from DA-OA pretreated SB produced 12.12g/L ABE in 120h. These results suggested that SB could be utilized efficient, economic, and environmental by DA-OA pretreatment.
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Affiliation(s)
- Hailong Li
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Lian Xiong
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Xuefang Chen
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Can Wang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Gaoxiang Qi
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chao Huang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Mutan Luo
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xinde Chen
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China.
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41
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Hidalgo M, Puerta-Fernández E. Metabolite labelling as a tool to define hierarchies in Clostridium acetobutylicum sugar usage and its relevance for biofuel production. Microb Biotechnol 2017; 10:525-527. [PMID: 28220690 PMCID: PMC5404190 DOI: 10.1111/1751-7915.12696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 01/25/2017] [Indexed: 11/29/2022] Open
Abstract
This is a highlight on article ‘Metabolite labelling reveals hierarchies in Clostridium acetobutylicum that selectively channel carbons from sugar mixtures towards biofuel precursors’ by Ludmilla Aristilde.
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Affiliation(s)
- María Hidalgo
- Departamento de Genética, Universidad de Sevilla, Avda. Reina Mercedes, 6, 41012, Sevilla, Spain
| | - Elena Puerta-Fernández
- Departamento de Genética, Universidad de Sevilla, Avda. Reina Mercedes, 6, 41012, Sevilla, Spain
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Quiroz-Ramírez JJ, Sánchez-Ramírez E, Hernández S, Ramírez-Prado JH, Segovia-Hernández JG. Multiobjective Stochastic Optimization Approach Applied to a Hybrid Process Production–Separation in the Production of Biobutanol. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04230] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Juan José Quiroz-Ramírez
- Universidad de Guanajuato, Campus Guanajuato, Departamento
de Ingeniería Química, Noria Alta s/n, 36050, Guanajuato, Gto. México
| | - Eduardo Sánchez-Ramírez
- Universidad de Guanajuato, Campus Guanajuato, Departamento
de Ingeniería Química, Noria Alta s/n, 36050, Guanajuato, Gto. México
| | - Salvador Hernández
- Universidad de Guanajuato, Campus Guanajuato, Departamento
de Ingeniería Química, Noria Alta s/n, 36050, Guanajuato, Gto. México
| | - Jorge Humberto Ramírez-Prado
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Biotecnología,
Calle 43 No. 130, Colonia Chuburná de Hidalgo, CP 97200, Mérida, Yucatán México
| | - Juan Gabriel Segovia-Hernández
- Universidad de Guanajuato, Campus Guanajuato, Departamento
de Ingeniería Química, Noria Alta s/n, 36050, Guanajuato, Gto. México
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Aristilde L. Metabolite labelling reveals hierarchies in Clostridium acetobutylicum that selectively channel carbons from sugar mixtures towards biofuel precursors. Microb Biotechnol 2016; 10:162-174. [PMID: 27878973 PMCID: PMC5270725 DOI: 10.1111/1751-7915.12459] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 10/23/2016] [Indexed: 12/30/2022] Open
Abstract
Clostridial fermentation of cellulose and hemicellulose relies on the cellular physiology controlling the metabolism of the cellulosic hexose sugar (glucose) with respect to the hemicellulosic pentose sugars (xylose and arabinose) and the hemicellulosic hexose sugars (galactose and mannose). Here, liquid chromatography–mass spectrometry and stable isotope tracers in Clostridium acetobutylicum were applied to investigate the metabolic hierarchy of glucose relative to the different hemicellulosic sugars towards two important biofuel precursors, acetyl‐coenzyme A and butyryl‐coenzyme A. The findings revealed constitutive metabolic hierarchies in C. acetobutylicum that facilitate (i) selective investment of hemicellulosic pentoses towards ribonucleotide biosynthesis without substantial investment into biofuel production and (ii) selective contribution of hemicellulosic hexoses through the glycolytic pathway towards biofuel precursors. Long‐term isotopic enrichment demonstrated incorporation of both pentose sugars into pentose‐phosphates and ribonucleotides in the presence of glucose. Kinetic labelling data, however, showed that xylose was not routed towards the biofuel precursors but there was minor contribution from arabinose. Glucose hierarchy over the hemicellulosic hexoses was substrate‐dependent. Kinetic labelling of hexose‐phosphates and triose‐phosphates indicated that mannose was assimilated but not galactose. Labelling of both biofuel precursors confirmed this metabolic preference. These results highlight important metabolic considerations in the accounting of clostridial mixed‐sugar utilization.
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Affiliation(s)
- Ludmilla Aristilde
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, 14853, USA
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Combined Detoxification and In-situ Product Removal by a Single Resin During Lignocellulosic Butanol Production. Sci Rep 2016; 6:30533. [PMID: 27459906 PMCID: PMC4962308 DOI: 10.1038/srep30533] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 07/05/2016] [Indexed: 01/14/2023] Open
Abstract
Phragmites australis (an invasive plant in North America) was used as feedstock for ABE (acetone-butanol-ethanol) fermentation by Clostridium saccharobutylicum. Sulphuric acid pretreated phragmites hydrolysate (SAEH) without detoxification inhibited butanol production (0.73 g/L butanol from 30 g/L sugars). The treatment of SAEH with resin L-493 prior the fermentation resulted in no inhibitory effects and an ABE titer of 14.44 g/L, including 5.49 g/L butanol was obtained, corresponding to an ABE yield and productivity of 0.49 g/g and 0.60 g/L/h, respectively. Dual functionality of the resin was realized by also using it as an in-situ product removal agent. Integrating in-situ product removal allowed for the use of high substrate concentrations without the typical product inhibition. Resin-detoxified SAEH was supplemented with neat glucose and an effective ABE titer of 33 g/L (including 13.7 g/L acetone, 16.4 g/L butanol and 1.9 g/L ethanol) was achieved with resin-based in-situ product removal, corresponding to an ABE yield and productivity of 0.41 g/g and 0.69 g/L/h, respectively. Both detoxification of the substrate and the products was achieved by the same resin, which was added prior the fermentation. Integrating hydrolysate detoxification and in-situ butanol removal in a batch process through single resin can potentially simplify cellulosic butanol production.
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Wang Y, Zhang ZT, Seo SO, Lynn P, Lu T, Jin YS, Blaschek HP. Bacterial Genome Editing with CRISPR-Cas9: Deletion, Integration, Single Nucleotide Modification, and Desirable "Clean" Mutant Selection in Clostridium beijerinckii as an Example. ACS Synth Biol 2016; 5:721-32. [PMID: 27115041 DOI: 10.1021/acssynbio.6b00060] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
CRISPR-Cas9 has been demonstrated as a transformative genome engineering tool for many eukaryotic organisms; however, its utilization in bacteria remains limited and ineffective. Here we explored Streptococcus pyogenes CRISPR-Cas9 for genome editing in Clostridium beijerinckii (industrially significant but notorious for being difficult to metabolically engineer) as a representative attempt to explore CRISPR-Cas9 for genome editing in microorganisms that previously lacked sufficient genetic tools. By combining inducible expression of Cas9 and plasmid-borne editing templates, we successfully achieved gene deletion and integration with high efficiency in single steps. We further achieved single nucleotide modification by applying innovative two-step approaches, which do not rely on availability of Protospacer Adjacent Motif sequences. Severe vector integration events were observed during the genome engineering process, which is likely difficult to avoid but has never been reported by other researchers for the bacterial genome engineering based on homologous recombination with plasmid-borne editing templates. We then further successfully employed CRISPR-Cas9 as an efficient tool for selecting desirable "clean" mutants in this study. The approaches we developed are broadly applicable and will open the way for precise genome editing in diverse microorganisms.
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Affiliation(s)
- Yi Wang
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Zhong-Tian Zhang
- Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Seung-Oh Seo
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Patrick Lynn
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Ting Lu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Department of Bioengineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Hans P Blaschek
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
- The Integrated Bioprocessing Research Laboratory (IBRL), University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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Zhang S, Qu C, Huang X, Suo Y, Liao Z, Wang J. Enhanced isopropanol and n-butanol production by supplying exogenous acetic acid via co-culturing two clostridium strains from cassava bagasse hydrolysate. ACTA ACUST UNITED AC 2016; 43:915-25. [DOI: 10.1007/s10295-016-1775-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 04/11/2016] [Indexed: 02/04/2023]
Abstract
Abstract
The focus of this study was to produce isopropanol and butanol (IB) from dilute sulfuric acid treated cassava bagasse hydrolysate (SACBH), and improve IB production by co-culturing Clostridium beijerinckii (C. beijerinckii) with Clostridium tyrobutyricum (C. tyrobutyricum) in an immobilized-cell fermentation system. Concentrated SACBH could be converted to solvents efficiently by immobilized pure culture of C. beijerinckii. Considerable solvent concentrations of 6.19 g/L isopropanol and 12.32 g/L butanol were obtained from batch fermentation, and the total solvent yield and volumetric productivity were 0.42 g/g and 0.30 g/L/h, respectively. Furthermore, the concentrations of isopropanol and butanol increased to 7.63 and 13.26 g/L, respectively, under the immobilized co-culture conditions when concentrated SACBH was used as the carbon source. The concentrations of isopropanol and butanol from the immobilized co-culture fermentation were, respectively, 42.62 and 25.45 % higher than the production resulting from pure culture fermentation. The total solvent yield and volumetric productivity increased to 0.51 g/g and 0.44 g/L/h when co-culture conditions were utilized. Our results indicated that SACBH could be used as an economically favorable carbon source or substrate for IB production using immobilized fermentation. Additionally, IB production could be significantly improved by co-culture immobilization, which provides extracellular acetic acid to C. beijerinckii from C. tyrobutyricum. This study provided a technically feasible and cost-efficient way for IB production using cassava bagasse, which may be suitable for industrial solvent production.
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Affiliation(s)
- Shaozhi Zhang
- grid.79703.3a 0000000417643838 School of Bioscience and Bioengineering South China University of Technology 510006 Guangzhou China
| | - Chunyun Qu
- grid.79703.3a 0000000417643838 School of Bioscience and Bioengineering South China University of Technology 510006 Guangzhou China
| | - Xiaoyan Huang
- grid.79703.3a 0000000417643838 School of Bioscience and Bioengineering South China University of Technology 510006 Guangzhou China
| | - Yukai Suo
- grid.79703.3a 0000000417643838 School of Bioscience and Bioengineering South China University of Technology 510006 Guangzhou China
| | - Zhengping Liao
- grid.79703.3a 0000000417643838 School of Bioscience and Bioengineering South China University of Technology 510006 Guangzhou China
| | - Jufang Wang
- grid.79703.3a 0000000417643838 School of Bioscience and Bioengineering South China University of Technology 510006 Guangzhou China
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Reeve BWP, Reid SJ. Glutamate and histidine improve both solvent yields and the acid tolerance response of Clostridium beijerinckii NCP 260. J Appl Microbiol 2016; 120:1271-81. [PMID: 26789025 DOI: 10.1111/jam.13067] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 11/10/2015] [Accepted: 01/12/2016] [Indexed: 11/28/2022]
Abstract
AIMS This study aims to examine the effect of amino acid supplementation on solvent production by Clostridium beijerinckii during the acetone-butanol fermentation and to determine whether amino acids are involved in the acid tolerance response (ATR), which results in increased solvents. METHODS AND RESULTS Fermentation studies with Cl. beijerinckii NCP 260 in limited-nitrogen media supplemented with glutamate, glutamine, lysine, proline, histidine or asparagine revealed that only glutamate, glutamine or histidine increased butanol titres comparable to control media. Acid survival tests at pH 5 showed that glutamate and histidine were effective in protecting Cl. beijerinckii cells against acid shock, and may be involved in the ATR. Using quantitative PCR, the transcription of the glutamine synthetase, nitrogen regulator and glutamate synthase operon (glnA-nitR-gltAB) was monitored during acid shock conditions, and expression of both the nitR and gltA genes was shown to be increased twofold. CONCLUSIONS Glutamate and histidine specifically enhance the ATR in Cl. beijerinckii NCP 260, and the genes encoding glutamate synthase and the NitR regulator are both upregulated, predicted to lead to increased endogenous glutamate pools during acidogenesis. This may enhance the ATR and allow more viable cells to enter solventogenesis, thereby increasing butanol titres. Glutamine, glutamate and histidine may also afford protection from butanol stress directly. SIGNIFICANCE AND IMPACT OF THE STUDY Using substrates naturally rich in glutamine, glutamate and histidine in industrial fermentations is a promising means to increase acid survival and solvent yields in solventogenic Clostridium.
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Affiliation(s)
- B W P Reeve
- University of Cape Town, Rondebosch, Cape Town, South Africa
| | - S J Reid
- University of Cape Town, Rondebosch, Cape Town, South Africa
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Park BJ, Park HM, Yun HS. Production of Biobutanol by Clostridium beijerinckii from Water Hyacinth. ACTA ACUST UNITED AC 2016. [DOI: 10.7841/ksbbj.2016.31.1.79] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhang L, Li X, Yong Q, Yang ST, Ouyang J, Yu S. Impacts of lignocellulose-derived inhibitors on L-lactic acid fermentation by Rhizopus oryzae. BIORESOURCE TECHNOLOGY 2016; 203:173-80. [PMID: 26724548 DOI: 10.1016/j.biortech.2015.12.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 11/28/2015] [Accepted: 12/08/2015] [Indexed: 05/23/2023]
Abstract
Inhibitors generated in the pretreatment and hydrolysis of corn stover and corn cob were identified. In general, they inhibited cell growth, lactate dehydrogenase, and lactic acid production but with less or no adverse effect on alcohol dehydrogenase and ethanol production in batch fermentation by Rhizopus oryzae. Furfural and 5-hydroxymethyl furfural (HMF) were highly toxic at 0.5-1 g L(-1), while formic and acetic acids at less than 4 g L(-1) and levulinic acid at 10 g L(-1) were not toxic. Among the phenolic compounds at 1 g L(-1), trans-cinnamic acid and syringaldehyde had the highest toxicity while syringic, ferulic and p-coumaric acids were not toxic. Although these inhibitors were present at concentrations much lower than their separately identified toxic levels, lactic acid fermentation with the hydrolysates showed much inferior performance compared to the control without inhibitor, suggesting synergistic or compounded effects of the lignocellulose-degraded compounds on inhibiting lactic acid fermentation.
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Affiliation(s)
- Li Zhang
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China; William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Xin Li
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
| | - Qiang Yong
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR 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.
| | - Jia Ouyang
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
| | - Shiyuan Yu
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
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