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Yi Y, Jin X, Chen M, Coldea TE, Zhao H. Surfactant-mediated bio-manufacture: A unique strategy for promoting microbial biochemicals production. Biotechnol Adv 2024; 73:108373. [PMID: 38704106 DOI: 10.1016/j.biotechadv.2024.108373] [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: 01/05/2024] [Revised: 04/03/2024] [Accepted: 05/01/2024] [Indexed: 05/06/2024]
Abstract
Biochemicals are widely used in the medicine and food industries and are more efficient and safer than synthetic chemicals. The amphipathic surfactants can interact with the microorganisms and embed the extracellular metabolites, which induce microbial metabolites secretion and biosynthesis, performing an attractive prospect of promoting the biochemical production. However, the commonness and differences of surfactant-mediated bio-manufacture in various fields are largely unexplored. Accordingly, this review comprehensively summarized the properties of surfactants, different application scenarios of surfactant-meditated bio-manufacture, and the mechanism of surfactants increasing metabolites production. Various biochemical productions such as pigments, amino acids, and alcohols could be enhanced using the cloud point and the micelles of surfactants. Besides, the amphiphilicity of surfactants also promoted the utilization of fermentation substrates, especially lignocellulose and waste sludge, by microorganisms, indirectly increasing the metabolites production. The increase in target metabolites production was attributed to the surfactants changing the permeability and composition of the cell membrane, hence improving the secretion ability of microorganisms. Moreover, surfactants could regulate the energy metabolism, the redox state and metabolic flow in microorganisms, which induced target metabolites synthesis. This review aimed to broaden the application fields of surfactants and provide novel insights into the production of microbial biochemicals.
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Affiliation(s)
- Yunxin Yi
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiaofan Jin
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Teodora Emilia Coldea
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Cluj-Napoca 400372, Romania
| | - Haifeng Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Research Institute for Food Nutrition and Human Health, Guangzhou 510640, China.
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2
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Zhang Y, Li J, Yong YC, Fang Z, Liu W, Yan H, Jiang H, Meng J. Efficient butyrate production from rice straw in an optimized cathodic electro-fermentation process. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 336:117695. [PMID: 36907062 DOI: 10.1016/j.jenvman.2023.117695] [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: 01/06/2023] [Revised: 02/25/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Butyrate production from renewable biomass shows great potential against climate change and over-consumption of fossil fuels. Herein, key operational parameters of a cathodic electro-fermentation (CEF) process were optimized for efficient butyrate production from rice straw by mixed culture. The cathode potential, controlled pH and initial substrate dosage were optimized at -1.0 V (vs Ag/AgCl), 7.0 and 30 g/L, respectively. Under the optimal conditions, 12.50 g/L butyrate with yield of 0.51 g/g-rice straw were obtained in batch-operated CEF system. In fed-batch mode, butyrate production significantly increased to 19.66 g/L with the yield of 0.33 g/g-rice straw, but 45.99% butyrate selectivity still needs to be improved in future. Enriched butyrate producing bacteria (Clostridium cluster XIVa and IV) with proportion of 58.75% on the 21st day of the fed-batch fermentation, contributed to the high-level butyrate production. The study provides a promising approach for efficient butyrate production from lignocellulosic biomass.
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Affiliation(s)
- Yafei Zhang
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, Harbin Institute of Technology, Harbin, 150090, China; Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Jianzheng Li
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, Harbin Institute of Technology, Harbin, 150090, China
| | - Yang-Chun Yong
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Zhen Fang
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Wenbin Liu
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, Harbin Institute of Technology, Harbin, 150090, China
| | - Han Yan
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, Harbin Institute of Technology, Harbin, 150090, China
| | - Haicheng Jiang
- School of Environmental and Material Engineering, Yantai University, Yantai, 264005, China
| | - Jia Meng
- National Engineering Research Center for Safe Sludge Disposal and Resource Recovery, Harbin Institute of Technology, Harbin, 150090, China.
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Han J, Xu B, Wang H, Huang G, Zhang X, Xu Y. Purification of acidic lignocellulose hydrolysate using anion-exchange resin: Multicomponent adsorption, kinetic and thermodynamic study. BIORESOURCE TECHNOLOGY 2022; 351:126979. [PMID: 35276375 DOI: 10.1016/j.biortech.2022.126979] [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: 02/16/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Acid hydrolysis of lignocellulosic biomass to produce high value-added products presents a breathtaking industrial application foreground. However, the hydrolysate under harsh conditions contains extremely complex degradations, resulting in many restrictions or lethal toxicity on the following utilization and bioconversion. In this study, the anion-exchange resin 335 was exploited to separate and purify main degradations from the acidic corncob-hydrolysate. A comprehensive investigation was explored on equilibrium isotherms, adsorption kinetics, and thermodynamic parameters of the representative substances in the hydrolysate. The results indicated that the removal of acetic acid, furfural, and lignin reached 90.13%, 92.58%, and 94.85% respectively, while the loss rate of xylose was well controlled within 20%. Based on these studies, various models and parameters were evaluated to uncover the mechanisms. In conclusion, this work offered a theoretical basis for the application in the separation and purification of acidic lignocellulose-hydrolysate and further bioconversion.
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Affiliation(s)
- Jian Han
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China; Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals, Nanjing 210037, People's Republic of China
| | - Bin Xu
- ECO Zhuoxin Energy-saving Technology (Shanghai) Company Limited, Shanghai 200000, People's Republic of China
| | - Huan Wang
- ECO Zhuoxin Energy-saving Technology (Shanghai) Company Limited, Shanghai 200000, People's Republic of China
| | - Guohong Huang
- Nanjing Hydraulic Research Institute, Materials & Structural Engineering Department, Nanjing 210029, People's Republic of China
| | - Xiaolei Zhang
- Department of Chemical and Process Engineering, University of Strathclyde, Glasgow G1 1XJ, UK
| | - Yong Xu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China; Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals, Nanjing 210037, People's Republic of China.
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4
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Enhancing acetic acid and 5‐hydroxymethyl furfural tolerance of C. saccharoperbutylacetonicum through adaptive laboratory evolution. Process Biochem 2021. [DOI: 10.1016/j.procbio.2020.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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5
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Recent advances in n-butanol and butyrate production using engineered Clostridium tyrobutyricum. World J Microbiol Biotechnol 2020; 36:138. [PMID: 32794091 DOI: 10.1007/s11274-020-02914-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 08/08/2020] [Indexed: 12/12/2022]
Abstract
Acidogenic clostridia naturally producing acetic and butyric acids has attracted high interest as a novel host for butyrate and n-butanol production. Among them, Clostridium tyrobutyricum is a hyper butyrate-producing bacterium, which re-assimilates acetate for butyrate biosynthesis by butyryl-CoA/acetate CoA transferase (CoAT), rather than the phosphotransbutyrylase-butyrate kinase (PTB-BK) pathway widely found in clostridia and other microbial species. To date, C. tyrobutyricum has been engineered to overexpress a heterologous alcohol/aldehyde dehydrogenase, which converts butyryl-CoA to n-butanol. Compared to conventional solventogenic clostridia, which produce acetone, ethanol, and butanol in a biphasic fermentation process, the engineered C. tyrobutyricum with a high metabolic flux toward butyryl-CoA produced n-butanol at a high yield of > 0.30 g/g and titer of > 20 g/L in glucose fermentation. With no acetone production and a high C4/C2 ratio, butanol was the only major fermentation product by the recombinant C. tyrobutyricum, allowing simplified downstream processing for product purification. In this review, novel metabolic engineering strategies to improve n-butanol and butyrate production by C. tyrobutyricum from various substrates, including glucose, xylose, galactose, sucrose, and cellulosic hydrolysates containing the mixture of glucose and xylose, are discussed. Compared to other recombinant hosts such as Clostridium acetobutylicum and Escherichia coli, the engineered C. tyrobutyricum strains with higher butyrate and butanol titers, yields and productivities are the most promising hosts for potential industrial applications.
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6
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Jiang L, Fu H, Yang HK, Xu W, Wang J, Yang ST. Butyric acid: Applications and recent advances in its bioproduction. Biotechnol Adv 2018; 36:2101-2117. [PMID: 30266343 DOI: 10.1016/j.biotechadv.2018.09.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 12/20/2022]
Abstract
Butyric acid is an important C4 organic acid with broad applications. It is currently produced by chemosynthesis from petroleum-based feedstocks. However, the fermentative production of butyric acid from renewable feedstocks has received growing attention because of consumer demand for green products and natural ingredients in foods, pharmaceuticals, animal feed supplements, and cosmetics. In this review, strategies for improving microbial butyric acid production, including strain engineering and novel fermentation process development are discussed and compared regarding product yield, titer, purity and productivity. Future perspectives on strain and process improvements for butyric acid production are also discussed.
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Affiliation(s)
- Ling Jiang
- School of Biology & Biological Engineering, South China University of Technology, Guangzhou 510006, China; College of Food Science and Light Industry, Nanjing Tech University, No. 5 Xinmofan Road, Nanjing 210009, China
| | - Hongxin Fu
- School of Biology & Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Hopen K Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Wei Xu
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA; School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Jufang Wang
- School of Biology & Biological Engineering, South China University of Technology, Guangzhou 510006, China; Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA.
| | - Shang-Tian Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA.
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7
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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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8
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Díaz VHG, Tost GO. Economic optimization of in situ extraction of inhibitors in acetone-ethanol-butanol (ABE) fermentation from lignocellulose. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Chun J, Choi O, Sang BI. Enhanced extraction of butyric acid under high-pressure CO 2 conditions to integrate chemical catalysis for value-added chemicals and biofuels. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:119. [PMID: 29713378 PMCID: PMC5911967 DOI: 10.1186/s13068-018-1120-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Extractive fermentation with the removal of carboxylic acid requires low pH conditions because acids are better partitioned into the solvent phase at low pH values. However, this requirement conflicts with the optimal near-neutral pH conditions for microbial growth. RESULTS CO2 pressurization was used, instead of the addition of chemicals, to decrease pH for the extraction of butyric acid, a fermentation product of Clostridium tyrobutyricum, and butyl butyrate was selected as an extractant. CO2 pressurization (50 bar) improved the extraction efficiency of butyric acid from a solution at pH 6, yielding a distribution coefficient (D) 0.42. In situ removal of butyric acid during fermentation increased the production of butyric acid by up to 4.10 g/L h, an almost twofold increase over control without the use of an extraction process. CONCLUSION In situ extraction of butyric acid using temporal CO2 pressurization may be applied to an integrated downstream catalytic process for upgrading butyric acid to value-added chemicals in an organic solvent.
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Affiliation(s)
- Jaesung Chun
- Department of Chemical Engineering, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul, 04763 South Korea
| | - Okkyoung Choi
- Department of Chemical Engineering, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul, 04763 South Korea
| | - Byoung-In Sang
- Department of Chemical Engineering, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul, 04763 South Korea
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10
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Luo H, Yang R, Zhao Y, Wang Z, Liu Z, Huang M, Zeng Q. Recent advances and strategies in process and strain engineering for the production of butyric acid by microbial fermentation. BIORESOURCE TECHNOLOGY 2018; 253:343-354. [PMID: 29329775 DOI: 10.1016/j.biortech.2018.01.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/28/2017] [Accepted: 01/01/2018] [Indexed: 06/07/2023]
Abstract
Butyric acid is an important platform chemical, which is widely used in the fields of food, pharmaceutical, energy, etc. Microbial fermentation as an alternative approach for butyric acid production is attracting great attention as it is an environmentally friendly bioprocessing. However, traditional fermentative butyric acid production is still not economically competitive compared to chemical synthesis route, due to the low titer, low productivity, and high production cost. Therefore, reduction of butyric acid production cost by utilization of alternative inexpensive feedstock, and improvement of butyric acid production and productivity has become an important target. Recently, several advanced strategies have been developed for enhanced butyric acid production, including bioprocess techniques and metabolic engineering methods. This review provides an overview of advances and strategies in process and strain engineering for butyric acid production by microbial fermentation. Additionally, future perspectives on improvement of butyric acid production are also proposed.
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Affiliation(s)
- Hongzhen Luo
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China.
| | - Rongling Yang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Yuping Zhao
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Zhaoyu Wang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Zheng Liu
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Mengyu Huang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Qingwei Zeng
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
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11
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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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13
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Todhanakasem T, Yodsanga S, Sowatad A, Kanokratana P, Thanonkeo P, Champreda V. Inhibition analysis of inhibitors derived from lignocellulose pretreatment on the metabolic activity of Zymomonas mobilis
biofilm and planktonic cells and the proteomic responses. Biotechnol Bioeng 2017; 115:70-81. [DOI: 10.1002/bit.26449] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/29/2017] [Accepted: 09/04/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Tatsaporn Todhanakasem
- Department of Agro-Industry; Faculty of Biotechnology; Assumption University; Bangkok Thailand
| | - Supanika Yodsanga
- Department of Agro-Industry; Faculty of Biotechnology; Assumption University; Bangkok Thailand
| | - Apinya Sowatad
- Department of Agro-Industry; Faculty of Biotechnology; Assumption University; Bangkok Thailand
| | - Pattanop Kanokratana
- National Center for Genetic Engineering and Biotechnology (BIOTEC); Pathumthani Thailand
| | | | - Verawat Champreda
- National Center for Genetic Engineering and Biotechnology (BIOTEC); Pathumthani Thailand
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14
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Fu H, Yang ST, Wang M, Wang J, Tang IC. Butyric acid production from lignocellulosic biomass hydrolysates by engineered Clostridium tyrobutyricum overexpressing xylose catabolism genes for glucose and xylose co-utilization. BIORESOURCE TECHNOLOGY 2017; 234:389-396. [PMID: 28343058 DOI: 10.1016/j.biortech.2017.03.073] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/08/2017] [Accepted: 03/10/2017] [Indexed: 06/06/2023]
Abstract
Clostridium tyrobutyricum can utilize glucose and xylose as carbon source for butyric acid production. However, xylose catabolism is inhibited by glucose, hampering butyric acid production from lignocellulosic biomass hydrolysates containing both glucose and xylose. In this study, an engineered strain of C. tyrobutyricum Ct-pTBA overexpressing heterologous xylose catabolism genes (xylT, xylA, and xylB) was investigated for co-utilizing glucose and xylose present in hydrolysates of plant biomass, including soybean hull, corn fiber, wheat straw, rice straw, and sugarcane bagasse. Compared to the wild-type strain, Ct-pTBA showed higher xylose utilization without significant glucose catabolite repression, achieving near 100% utilization of glucose and xylose present in lignocellulosic biomass hydrolysates in bioreactor at pH 6. About 42.6g/L butyrate at a productivity of 0.56g/L·h and yield of 0.36g/g was obtained in batch fermentation, demonstrating the potential of C. tyrobutyricum Ct-pTBA for butyric acid production from lignocellulosic biomass hydrolysates.
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Affiliation(s)
- Hongxin Fu
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China; Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Shang-Tian Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA.
| | - Minqi Wang
- College of Animal Science, Zhejiang University, Hangzhou 310058, China
| | - Jufang Wang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - I-Ching Tang
- Bioprocessing Innovative Company, 4734 Bridle Path Ct., Dublin, OH 43017, USA
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Luo H, Zeng Q, Han S, Wang Z, Dong Q, Bi Y, Zhao Y. High-efficient n-butanol production by co-culturing Clostridium acetobutylicum and Saccharomyces cerevisiae integrated with butyrate fermentative supernatant addition. World J Microbiol Biotechnol 2017; 33:76. [PMID: 28337710 DOI: 10.1007/s11274-017-2246-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 03/15/2017] [Indexed: 01/22/2023]
Abstract
Butanol is not only an important chemical intermediate and solvent in pharmaceutical and cosmetics industries, but also considered as an advanced biofuel. Although species of the natural host Clostridium have been engineered, butanol titers in the anaerobe seem to be limited by its intolerance to butanol less than 13 g/L. Here we aimed to develop a technology for enhancing butanol production by a co-culture system with butyrate fermentative supernatant addition. First, when adding 4.0 g/L butyrate into the acetone-butanol-ethanol (ABE) fermentation broth with single-shot at 24 h, the "acid crash" phenomenon occurred and the ABE fermentation performance deteriorated. Subsequently, we found that adding certain amino acids could effectively enhance butyrate re-assimilation, butanol tolerance and titer (from 11.1 to 14.8 g/L). Additionally, in order to decrease the raw material cost, butyrate fermentative supernatant produced by Clostridium tyrobutyricum was applied to butanol production in the Clostridium acetobutylicum/Saccharomyces cerevisiae co-culture system, instead of adding synthetic butyrate. Final butanol and total ABE concentrations reached higher levels of 16.3 and 24.8 g/L with increments of 46.8 and 37.8%, respectively. These results show that the proposed fermentation strategy has great potential for efficiently butanol production with an economic approach.
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Affiliation(s)
- Hongzhen Luo
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China. .,The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
| | - Qingwei Zeng
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Shuo Han
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Zhaoyu Wang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Qing Dong
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Yanhong Bi
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Yuping Zhao
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
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16
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Microbial Production of Short Chain Fatty Acids from Lignocellulosic Biomass: Current Processes and Market. BIOMED RESEARCH INTERNATIONAL 2016; 2016:8469357. [PMID: 27556042 PMCID: PMC4983341 DOI: 10.1155/2016/8469357] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 06/30/2016] [Indexed: 11/23/2022]
Abstract
Biological production of organic acids from conversion of biomass derivatives has received increased attention among scientists and engineers and in business because of the attractive properties such as renewability, sustainability, degradability, and versatility. The aim of the present review is to summarize recent research and development of short chain fatty acids production by anaerobic fermentation of nonfood biomass and to evaluate the status and outlook for a sustainable industrial production of such biochemicals. Volatile fatty acids (VFAs) such as acetic acid, propionic acid, and butyric acid have many industrial applications and are currently of global economic interest. The focus is mainly on the utilization of pretreated lignocellulosic plant biomass as substrate (the carbohydrate route) and development of the bacteria and processes that lead to a high and economically feasible production of VFA. The current and developing market for VFA is analyzed focusing on production, prices, and forecasts along with a presentation of the biotechnology companies operating in the market for sustainable biochemicals. Finally, perspectives on taking sustainable product of biochemicals from promise to market introduction are reviewed.
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