1
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Wang L, Jin W, Cai F, Song C, Jin Y, Liu G, Chen C. Performance and mechanism of various microaerobic pretreatments on anaerobic digestion of tobacco straw. BIORESOURCE TECHNOLOGY 2024; 393:130092. [PMID: 38000644 DOI: 10.1016/j.biortech.2023.130092] [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: 09/25/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 11/26/2023]
Abstract
Tobacco straw is an abundant biomass in China's agricultural ecosystems, and has high potential for methane production. However, the anaerobic digestion (AD) efficiency is limited by the recalcitrant lignocellulose structure of the tobacco straw. In this study, three microaerobic pretreatments were performed for the AD of tobacco straw to increase methane production. Among them, microbial pretreatment with biogas slurry at an oxygen concentration of 4 mL/g VS resulted in the highest methane production of 349.1 mL/g VS, increasing by 19.8 % than that of untreated. During this pretreatment, the relative abundances of Enterococcus and Clostridium sensu stricto 12, which are closely related to acetic acid production and cellulose degradation, were high, and these bacteria might have an important contribution to substrate hydrolysis and the methanogenesis efficiency of the AD process. This study advances the understanding of microaerobic pretreatment processes and provides technological guidance for the efficient utilization of tobacco straw.
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Affiliation(s)
- Ligong Wang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wenxiong Jin
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Fanfan Cai
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chao Song
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yan Jin
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Guangqing Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chang Chen
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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2
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Sierra-Ibarra E, Alcaraz-Cienfuegos J, Vargas-Tah A, Rosas-Aburto A, Valdivia-López Á, Hernández-Luna MG, Vivaldo-Lima E, Martinez A. Ethanol production by Escherichia coli from detoxified lignocellulosic teak wood hydrolysates with high concentration of phenolic compounds. J Ind Microbiol Biotechnol 2021; 49:6382998. [PMID: 34617569 PMCID: PMC9118984 DOI: 10.1093/jimb/kuab077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/01/2021] [Indexed: 11/13/2022]
Abstract
Teak wood residues were subjected to thermochemical pretreatment, enzymatic saccharification, and detoxification to obtain syrups with a high concentration of fermentable sugars for ethanol production with the ethanologenic Escherichia coli strain MS04. Teak is a hardwood, and thus a robust deconstructive pretreatment was applied followed by enzymatic saccharification. The resulting syrup contained 60 g L-1 glucose, 18 g L-1 xylose, 6 g L-1 acetate, less than 0.1 g L-1 of total furans, and 12 g L-1 of soluble phenolic compounds (SPC). This concentration of SPC is toxic to E. coli, and thus two detoxification strategies were assayed: 1) treatment with Coriolopsis gallica laccase followed by addition of activated carbon and 2) overliming with Ca(OH)2. These reduced the phenolic compounds by 40 and 76%, respectively. The detoxified syrups were centrifuged and fermented with E. coli MS04. Cultivation with the over-limed hydrolysate showed a 60% higher volumetric productivity (0.45 gETOH L-1 h-1). The bioethanol/sugars yield was over 90% in both strategies.
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Affiliation(s)
- Estefanía Sierra-Ibarra
- Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México
| | - Jorge Alcaraz-Cienfuegos
- Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México
| | - Alejandra Vargas-Tah
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Col. Chamilpa, Cuernavaca, Morelos 62210, México
| | - Alberto Rosas-Aburto
- Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México
| | - Ángeles Valdivia-López
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México
| | - Martín G Hernández-Luna
- Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México
| | - Eduardo Vivaldo-Lima
- Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México
| | - Alfredo Martinez
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Col. Chamilpa, Cuernavaca, Morelos 62210, México
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3
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Wang L, Liu C, Wei B, Song C, Cai F, Liu G, Chen C. Effects of different microbial pretreatments on the anaerobic digestion of giant grass under anaerobic and microaerobic conditions. BIORESOURCE TECHNOLOGY 2021; 337:125456. [PMID: 34320740 DOI: 10.1016/j.biortech.2021.125456] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/16/2021] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
Microbial pretreatment to lignocellulosic biomass for anaerobic digestion (AD) has achieved increased attention; however, the low efficiency and unclear mechanism of oxygen parameter affecting this process performance limit its practical application. In this study, five readily available microbial consortia were developed to analyze the influences of various oxygen concentrations during pretreatment process upon methane conversion efficiency and microbiota within AD of giant grass. Results found that anaerobic pretreatment by liquid or straw composting inoculant, along with microaerobic pretreatment by cow manure at 10 mL/g VS oxygen concentration, obtained 23.1%, 24.4%, and 16.0% higher methane yields (275.3, 279.8, and 265.3 mL/g VS) than corresponding untreated group, respectively. Microbial community analyses showed that microbial responses to oxygen varied significantly with microbial consortium, which consequently caused different AD performances. The findings will enrich theoretical knowledge of microbial pretreatment and provide a technological guidance for efficient utilization of giant grass and other lignocellulosic biomasses.
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Affiliation(s)
- Ligong Wang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Caiyan Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Baocheng Wei
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chao Song
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Fanfan Cai
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Guangqing Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chang Chen
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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4
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Mesquita TJB, Sandri JP, de Campos Giordano R, Horta ACL, Zangirolami TC. A High-Throughput Approach for Modeling and Simulation of Homofermentative Microorganisms Applied to Ethanol Fermentation by S. cerevisiae. Ind Biotechnol (New Rochelle N Y) 2021. [DOI: 10.1089/ind.2020.0034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
| | - Juliana Passamani Sandri
- Graduate Program of Chemical Engineering, Federal University of São Carlos, São Carlos, SP, Brazil
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5
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Pasotti L, De Marchi D, Casanova M, Massaiu I, Bellato M, Cusella De Angelis MG, Calvio C, Magni P. Engineering endogenous fermentative routes in ethanologenic Escherichia coli W for bioethanol production from concentrated whey permeate. N Biotechnol 2020; 57:55-66. [DOI: 10.1016/j.nbt.2020.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 02/17/2020] [Accepted: 02/29/2020] [Indexed: 12/01/2022]
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6
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Martínez-Patiño JC, Ruiz E, Cara C, Romero I, Castro E. Advanced bioethanol production from olive tree biomass using different bioconversion schemes. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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7
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Wu M, Zhang W, Ji Y, Yi X, Ma J, Wu H, Jiang M. Coupled CO 2 fixation from ethylene oxide off-gas with bio-based succinic acid production by engineered recombinant Escherichia coli. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.07.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Akbas MY, Stark BC. Recent trends in bioethanol production from food processing byproducts. J Ind Microbiol Biotechnol 2016; 43:1593-1609. [PMID: 27565674 DOI: 10.1007/s10295-016-1821-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 07/30/2016] [Indexed: 12/19/2022]
Abstract
The widespread use of corn starch and sugarcane as sources of sugar for the production of ethanol via fermentation may negatively impact the use of farmland for production of food. Thus, alternative sources of fermentable sugars, particularly from lignocellulosic sources, have been extensively investigated. Another source of fermentable sugars with substantial potential for ethanol production is the waste from the food growing and processing industry. Reviewed here is the use of waste from potato processing, molasses from processing of sugar beets into sugar, whey from cheese production, byproducts of rice and coffee bean processing, and other food processing wastes as sugar sources for fermentation to ethanol. Specific topics discussed include the organisms used for fermentation, strategies, such as co-culturing and cell immobilization, used to improve the fermentation process, and the use of genetic engineering to improve the performance of ethanol producing fermenters.
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Affiliation(s)
- Meltem Yesilcimen Akbas
- Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Kocaeli, 41400, Turkey. .,Institute of Biotechnology, Gebze Technical University, Gebze-Kocaeli, Kocaeli, 41400, Turkey.
| | - Benjamin C Stark
- Biology Department, Illinois Institute of Technology, Chicago, IL, 60616, USA
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9
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Tomás-Pejó E, Olsson L. Influence of the propagation strategy for obtaining robust Saccharomyces cerevisiae cells that efficiently co-ferment xylose and glucose in lignocellulosic hydrolysates. Microb Biotechnol 2015; 8:999-1005. [PMID: 25989314 PMCID: PMC4621452 DOI: 10.1111/1751-7915.12280] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/06/2015] [Accepted: 02/22/2015] [Indexed: 12/31/2022] Open
Abstract
Development of xylose-fermenting yeast strains that are tolerant to the inhibitors present in lignocellulosic hydrolysates is crucial to achieve efficient bioethanol production processes. In this study, the importance of the propagation strategy for obtaining robust cells was studied. Addition of hydrolysate during propagation of the cells adapted them to the inhibitors, resulting in more tolerant cells with shorter lag phases and higher specific growth rates in minimal medium containing acetic acid and vanillin than unadapted cells. Addition of hydrolysate during propagation also resulted in cells with better fermentation capabilities. Cells propagated without hydrolysate were unable to consume xylose in wheat straw hydrolysate fermentations, whereas 40.3% and 97.7% of the xylose was consumed when 12% and 23% (v/v) hydrolysate, respectively, was added during propagation. Quantitative polymerase chain reaction revealed changes in gene expression, depending on the concentration of hydrolysate added during propagation. This study highlights the importance of using an appropriate propagation strategy for the optimum performance of yeast in fermentation of lignocellulosic hydrolysates.
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Affiliation(s)
- Elia Tomás-Pejó
- Department of Biology and Biological Engineering, Industrial Biotechnology, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden.,Unit of Biotechnological Processes for Energy Production, Instituto Madrileño De Estudios Avanzados (IMDEA) Energy, 28935, Móstoles (Madrid), Spain
| | - Lisbeth Olsson
- Department of Biology and Biological Engineering, Industrial Biotechnology, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
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10
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Sumer F, Stark BC, Yesilcimen Akbas M. Efficient ethanol production from potato and corn processing industry waste using E. coli engineered to express Vitreoscilla haemoglobin. ENVIRONMENTAL TECHNOLOGY 2015; 36:2319-2327. [PMID: 25766084 DOI: 10.1080/09593330.2015.1026846] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Engineering of ethanologenic E. coli to express the haemoglobin (VHb) from the bacterium Vitreoscilla has been shown to enhance ethanol production by fermentation of pure sugars, sugars from hydrolysis of lignocellulose, components of whey, and sugars from wastewater produced during potato processing. Here, these studies were extended to see whether the same effect could be seen when a mixture of waste materials from processing of potatoes and corn into potato and corn chips were used as sugar sources. Consistent increases in ethanol production coincident with VHb expression were seen in shake flasks at both low aeration and high aeration conditions. The ethanol increases were due almost entirely to increases in the amount of ethanol produced per unit of cell mass. The VHb strategy for increasing fermentation to ethanol (and perhaps other valuable fermentation products) may be of general use, particularly regarding conversion of otherwise discarded materials into valuable commodities.
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Affiliation(s)
- Fatma Sumer
- a Department of Molecular Biology and Genetics , Gebze Technical University , Gebze , Kocaeli 41400 , Turkey
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11
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Geddes R, Shanmugam KT, Ingram LO. Combining treatments to improve the fermentation of sugarcane bagasse hydrolysates by ethanologenic Escherichia coli LY180. BIORESOURCE TECHNOLOGY 2015; 189:15-22. [PMID: 25864026 DOI: 10.1016/j.biortech.2015.03.141] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/27/2015] [Accepted: 03/29/2015] [Indexed: 06/04/2023]
Abstract
Inhibitory side products from dilute acid pretreatment is a major challenge for conversion of lignocellulose into ethanol. Six strategies to detoxify sugarcane hydrolysates were investigated alone, and in combinations (vacuum evaporation of volatiles, high pH treatment with ammonia, laccase, bisulfite, microaeration, and inoculum size). High pH was the most beneficial single treatment, increasing the minimum inhibitory concentration (measured by ethanol production) from 15% (control) to 70% hydrolysate. Combining treatments provided incremental improvements, consistent with different modes of action and multiple inhibitory compounds. Screening toxicity using tube cultures proved to be an excellent predictor of relative performance in pH-controlled fermenters. A combination of treatments (vacuum evaporation, laccase, high pH, bisulfite, microaeration) completely eliminated all inhibitory activity present in hydrolysate. With this combination, fermentation of hemicellulose sugars (90% hydrolysate) to ethanol was complete within 48 h, identical to the fermentation of laboratory xylose (50 g/L) in AM1 mineral salts medium (without hydrolysate).
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Affiliation(s)
- Ryan Geddes
- Department of Microbiology & Cell Science, University of Florida, Box 110700, Gainesville, FL 32611, USA.
| | - Keelnatham T Shanmugam
- Department of Microbiology & Cell Science, University of Florida, Box 110700, Gainesville, FL 32611, USA.
| | - Lonnie O Ingram
- Department of Microbiology & Cell Science, University of Florida, Box 110700, Gainesville, FL 32611, USA.
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12
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Recent applications of Vitreoscilla hemoglobin technology in bioproduct synthesis and bioremediation. Appl Microbiol Biotechnol 2015; 99:1627-36. [PMID: 25575886 DOI: 10.1007/s00253-014-6350-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 12/19/2014] [Accepted: 12/21/2014] [Indexed: 10/24/2022]
Abstract
Since its first use in 1990 to enhance production of α-amylase in E. coli, engineering of heterologous hosts to express the hemoglobin from the bacterium Vitreoscilla (VHb) has become a widely used strategy to enhance production of a variety of bioproducts, stimulate bioremediation, and increase growth and survival of engineered organisms. The hosts have included a variety of bacteria, yeast, fungi, higher plants, and even animals. The beneficial effects of VHb expression are presumably the result of one or more of its activities. The available evidence indicates that these include oxygen binding and delivery to the respiratory chain and oxygenases, protection against reactive oxygen species, and control of gene expression. In the past 4 to 5 years, the use of this "VHb technology" has continued in a variety of biotechnological applications in a wide range of organisms. These include enhancement of production of an ever wider array of bioproducts, new applications in bioremediation, a possible role in enhancing aerobic waste water treatment, and the potential to enhance growth and survival of both plants and animals of economic importance.
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14
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Akbas MY, Sar T, Ozcelik B. Improved ethanol production from cheese whey, whey powder, and sugar beet molasses by "Vitreoscilla hemoglobin expressing" Escherichia coli. Biosci Biotechnol Biochem 2014; 78:687-94. [PMID: 25036968 DOI: 10.1080/09168451.2014.896734] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
This work investigated the improvement of ethanol production by engineered ethanologenic Escherichia coli to express the hemoglobin from the bacterium Vitreoscilla (VHb). Ethanologenic E. coli strain FBR5 and FBR5 transformed with the VHb gene in two constructs (strains TS3 and TS4) were grown in cheese whey (CW) medium at small and large scales, at both high and low aeration, or with whey powder (WP) or sugar beet molasses hydrolysate (SBMH) media at large scale and low aeration. Culture pH, cell growth, VHb levels, and ethanol production were evaluated after 48 h. VHb expression in TS3 and TS4 enhanced their ethanol production in CW (21-419%), in WP (17-362%), or in SBMH (48-118%) media. This work extends the findings that "VHb technology" may be useful for improving the production of ethanol from waste and byproducts of various sources.
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Affiliation(s)
- Meltem Yesilcimen Akbas
- a Department of Molecular Biology and Genetics , Gebze Institute of Technology , Gebze , Turkey
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15
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Cheng YS, Zheng Y, Labavitch JM, VanderGheynst JS. Virus infection of Chlorella variabilis and enzymatic saccharification of algal biomass for bioethanol production. BIORESOURCE TECHNOLOGY 2013; 137:326-331. [PMID: 23597760 DOI: 10.1016/j.biortech.2013.03.055] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 03/07/2013] [Accepted: 03/09/2013] [Indexed: 06/02/2023]
Abstract
Experiments were conducted to investigate the application of virus infection and amylolytic enzyme treatment on sugar release from Chlorella variabilis NC64A and bioethanol production from released sugars via Escherichia coli KO11 fermentation. Chlorella variabilis NC64A accumulated starch when it was cultured in a nitrogen-limited medium. The accumulated starch was not consumed during viral infection based on analysis of sugars released during infection. Both amylolytic enzyme addition and virus infection increased the hydrolysis of carbohydrates. Addition of amylolytic enzymes increased the release of glucose from algal biomass while virus addition increased the release of non-glucose neutral sugars. The combination of enzyme addition and virus infection also resulted in the highest ethanol production after fermentation. Acetic acid was generated as a co-product during fermentation in all sets of experiments. This study demonstrated that infection of microalgae with an algal virus resulted in disruption and hydrolysis of algal biomass to generate fermentable sugars.
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Affiliation(s)
- Yu-Shen Cheng
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, United States
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16
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Stark BC, Dikshit KL, Pagilla KR. The Biochemistry of Vitreoscilla hemoglobin. Comput Struct Biotechnol J 2012; 3:e201210002. [PMID: 24688662 PMCID: PMC3962134 DOI: 10.5936/csbj.201210002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 09/17/2012] [Indexed: 01/17/2023] Open
Abstract
The hemoglobin (VHb) from Vitreoscilla was the first bacterial hemoglobin discovered. Its structure and function have been extensively investigated, and engineering of a wide variety of heterologous organisms to express VHb has been performed to increase their growth and productivity. This strategy has shown promise in applications as far-ranging as the production of antibiotics and petrochemical replacements by microorganisms to increasing stress tolerance in plants. These applications of “VHb technology” have generally been of the “black box” variety, wherein the endpoint studied is an increase in the levels of a certain product or improved growth and survival. Their eventual optimization, however, will require a thorough understanding of the various functions and activities of VHb, and how VHb expression ripples to affect metabolism more generally. Here we review the current knowledge of these topics. VHb's functions all involve oxygen binding (and often delivery) in one way or another. Several biochemical and structure-function studies have provided an insight into the molecular details of this binding and delivery. VHb activities are varied. They include supply of oxygen to oxygenases and the respiratory chain, particularly under low oxygen conditions; oxygen sensing and modulation of transcription factor activity; and detoxification of NO, and seem to require interactions of VHb with “partner proteins”. VHb expression affects the levels of ATP and NADH, although not enormously. VHb expression may affect the level of many compounds of intermediary metabolism, and, apparently, alters the levels of expression of many genes. Thus, the metabolic changes in organisms engineered to express VHb are likely to be numerous and complicated.
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Affiliation(s)
- Benjamin C Stark
- Biology Division, Department of Biological and Chemical Sciences, Illinois Institute of Technology, Chicago IL 60616, USA
| | - Kanak L Dikshit
- Institute of Microbial Technology, Sec-39a, Chandigarh, 160036, India
| | - Krishna R Pagilla
- Department of Civil and Architectural Engineering, Illinois Institute of Technology, Chicago IL 60616, USA
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Abanoz K, Stark B, Akbas M. Enhancement of ethanol production from potato-processing wastewater by engineering Escherichia coli
using Vitreoscilla
haemoglobin. Lett Appl Microbiol 2012; 55:436-43. [DOI: 10.1111/lam.12000] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 09/10/2012] [Accepted: 09/10/2012] [Indexed: 11/29/2022]
Affiliation(s)
- K. Abanoz
- Department of Molecular Biology and Genetics; Gebze Institute of Technology; Gebze-Kocaeli Turkey
| | - B.C. Stark
- Biology Division, Department of Biological and Chemical Sciences; Illinois Institute of Technology; Chicago IL USA
| | - M.Y. Akbas
- Department of Molecular Biology and Genetics; Gebze Institute of Technology; Gebze-Kocaeli Turkey
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18
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Wang B, Lin H, Zhan J, Yang Y, Zhou Q, Zhao Y. Biodiesel synthesis by a one-step method in a genetically engineered Escherichia coli using rice straw hydrolysate and restaurant oil wastes as raw materials. J Appl Microbiol 2012; 113:531-40. [DOI: 10.1111/j.1365-2672.2012.05357.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Revised: 05/13/2012] [Accepted: 06/02/2012] [Indexed: 11/28/2022]
Affiliation(s)
- B. Wang
- Institute of Microbiology; College of Life Sciences; Zhejiang University; Hangzhou; China
| | - H. Lin
- Institute of Microbiology; College of Life Sciences; Zhejiang University; Hangzhou; China
| | - J. Zhan
- Institute of Plant Science; College of Life Sciences; Zhejiang University; Hangzhou; China
| | - Y. Yang
- Institute of Microbiology; College of Life Sciences; Zhejiang University; Hangzhou; China
| | - Q. Zhou
- Institute of Plant Science; College of Life Sciences; Zhejiang University; Hangzhou; China
| | - Y. Zhao
- Institute of Microbiology; College of Life Sciences; Zhejiang University; Hangzhou; China
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Nieves IU, Geddes CC, Mullinnix MT, Hoffman RW, Tong Z, Castro E, Shanmugam KT, Ingram LO. Injection of air into the headspace improves fermentation of phosphoric acid pretreated sugarcane bagasse by Escherichia coli MM170. BIORESOURCE TECHNOLOGY 2011; 102:6959-65. [PMID: 21531547 DOI: 10.1016/j.biortech.2011.04.036] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 04/08/2011] [Accepted: 04/11/2011] [Indexed: 05/23/2023]
Abstract
Microaeration (injecting air into the headspace) improved the fermentation of hemicellulose hydrolysates obtained from the phosphoric acid pretreatment of sugarcane bagasse at 170°C for 10 min. In addition, with 10% slurries of phosphoric acid pretreated bagasse (180°C, 10 min), air injection into the headspace promoted xylose utilization and increased ethanol yields from 0.16 to 0.20 g ethanol/g bagasse dry weight using a liquefaction plus simultaneous saccharification and co-fermentation process (L+SScF). This process was scaled up to 80 L using slurries of acid pretreated bagasse (96 h incubation; 0.6L of air/min into the headspace) with ethanol yields of 312-347 L (82-92 gal) per tone (dry matter), corresponding to 0.25 and 0.27 g/g bagasse (dry weight). Injection of small amounts of air into the headspace may provide a convenient alternative to subsurface sparging that avoids problems of foaming, sparger hygiene, flotation of particulates, and phase separation.
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Affiliation(s)
- I U Nieves
- Department of Microbiology & Cell Science, University of Florida, Box 110700, Gainesville, FL 32611, USA.
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20
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Geddes CC, Nieves IU, Ingram LO. Advances in ethanol production. Curr Opin Biotechnol 2011; 22:312-9. [DOI: 10.1016/j.copbio.2011.04.012] [Citation(s) in RCA: 184] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 04/18/2011] [Indexed: 12/23/2022]
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A whole cell biocatalyst for cellulosic ethanol production from dilute acid-pretreated corn stover hydrolyzates. Appl Microbiol Biotechnol 2011; 91:529-42. [PMID: 21519935 DOI: 10.1007/s00253-011-3261-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 03/17/2011] [Accepted: 03/20/2011] [Indexed: 10/18/2022]
Abstract
In this research, a recombinant whole cell biocatalyst was developed by expressing three cellulases from Clostridium cellulolyticum--endoglucanase (Cel5A), exoglucanase (Cel9E), and β-glucosidase--on the surface of the Escherichia coli LY01. The modified strain is identified as LY01/pRE1H-AEB. The cellulases were displayed on the surface of the cell by fusing with an anchor protein, PgsA. The developed whole cell biocatalyst was used for single-step ethanol fermentation using the phosphoric acid-swollen cellulose (PASC) and the dilute acid-pretreated corn stover. Ethanol production was 3.59 ± 0.15 g/L using 10 g/L of PASC, which corresponds to a theoretical yield of 95.4 ± 0.15%. Ethanol production was 0.30 ± 0.02 g/L when 1 g/L equivalent of glucose in the cellulosic fraction of the dilute sulfuric acid-pretreated corn stover (PCS) was fermented for 84 h. A total of 0.71 ± 0.12 g/L ethanol was produced in 48 h when the PCS was fermented in the simultaneous saccharification and co-fermentation mode using the hemicellulosic (1 g/L of total soluble sugar) and as well as the cellulosic (1 g/L of glucose equivalent) parts of PCS. In a control experiment, 0.48 g/L ethanol was obtained from 1 g/L of hemicellulosic PCS. It was concluded that the whole cell biocatalyst could convert both cellulosic and hemicellulosic substrates into ethanol in a single reactor. The developed C. cellulolyticum-E. coli whole cell biocatalyst also overcame the incompatible temperature problem of the frequently reported fungal-yeast systems.
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22
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Borges ER, Pereira N. Succinic acid production from sugarcane bagasse hemicellulose hydrolysate by Actinobacillus succinogenes. J Ind Microbiol Biotechnol 2010; 38:1001-11. [DOI: 10.1007/s10295-010-0874-7] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Accepted: 09/13/2010] [Indexed: 11/29/2022]
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23
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Adaptive evolution of Escherichia coli inactivated in the phosphotransferase system operon improves co-utilization of xylose and glucose under anaerobic conditions. Appl Biochem Biotechnol 2010; 163:485-96. [PMID: 20740380 DOI: 10.1007/s12010-010-9056-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Accepted: 08/04/2010] [Indexed: 10/19/2022]
Abstract
Modification of the phosphoenolpyruvate/sugar phosphotransferase system (PTS) has shown improvement in sugar coassimilation in Escherichia coli production strains. However, in preliminary experiments under anaerobic conditions, E. coli strains with an inactive PTS and carrying pLOI1594, which encodes pyruvate decarboxylase and alcohol dehydrogenase from Zymomonas mobilis, were unable to grow. These PTS⁻ strains were previously evolved under aerobic conditions to grow rapidly in glucose (PTS⁻ Glucose+ phenotype). Thus, in this work, applying a continuous culture strategy under anaerobic conditions, we generate a new set of evolved PTS⁻ Glucose+ mutants, VH30N1 to VH30N6. Contrary to aerobically evolved mutants, strains VH30N2 and VH30N4 carrying pLOI1594 grew in anaerobiosis; also, their growth capacity was restored in a 100%, showing specific growth rates (μ ~ 0.12 h⁻¹) similar to the PTS+ parental strain (μ = 0.11 h⁻¹). In cultures of VH30N2/pLOI1594 and VH30N4/pLOI1594 using a glucose-xylose mixture, xylose was totally consumed and consumption of sugars occurred in a simultaneous manner indicating that catabolic repression is alleviated in these strains. Also, the efficient sugar coassimilation by the evolved strains caused an increment in the ethanol yields.
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Li BZ, Balan V, Yuan YJ, Dale BE. Process optimization to convert forage and sweet sorghum bagasse to ethanol based on ammonia fiber expansion (AFEX) pretreatment. BIORESOURCE TECHNOLOGY 2010; 101:1285-92. [PMID: 19811909 DOI: 10.1016/j.biortech.2009.09.044] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Revised: 09/01/2009] [Accepted: 09/10/2009] [Indexed: 05/09/2023]
Abstract
With growing demand for bio-based fuels and chemicals, there has been much attention given to the performance of different feedstocks. We have optimized the ammonia fiber expansion (AFEX) pretreatment and fermentation process to convert forage and sweet sorghum bagasse to ethanol. AFEX pretreatment was optimized for forage sorghum and sweet sorghum bagasse. Supplementing xylanase with cellulase during enzymatic hydrolysis increased both glucan and xylan conversion to 90% at 1% glucan loading. High solid loading hydrolyzates from the optimized AFEX conditions were fermented using Saccharomyces cerevisiae 424A (LNH-ST) without any external nutrient supplementation or detoxification. The strain was better able to utilize xylose at pH 6.0 than at pH 4.8, but glycerol production was higher for the former pH than the latter. The maximum final ethanol concentration in the fermentation broth was 30.9 g/L (forage sorghum) and 42.3 g/L (sweet sorghum bagasse). A complete mass balance for the process is given.
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Affiliation(s)
- Bing-Zhi Li
- Key Laboratory of Systems Bioengineering, Ministry of Education, Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, P.O. Box 6888, Tianjin 300072, PR China
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25
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Zou YZ, Qi K, Chen X, Miao XL, Zhong JJ. Favorable effect of very low initial K(L)a value on xylitol production from xylose by a self-isolated strain of Pichia guilliermondii. J Biosci Bioeng 2009; 109:149-52. [PMID: 20129099 DOI: 10.1016/j.jbiosc.2009.07.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Revised: 07/06/2009] [Accepted: 07/17/2009] [Indexed: 11/27/2022]
Abstract
Xylitol production from xylose by a self-isolated furfural and 5-hydroxymethyl furfural assimilating Pichia guilliermondii was studied under oxygen limitation. An extremely low initial volumetric oxygen transfer coefficient (0.075 h(-1)) was found most favorable to the xylitol production with yield of 0.61 g g(-1). Related enzymes activities were also investigated and discussed.
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Affiliation(s)
- Yun-zhi Zou
- Key Laboratory of Microbial Metabolism, Ministry of Education, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, China
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26
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Zhu M, Lü F, Hao LP, He PJ, Shao LM. Regulating the hydrolysis of organic wastes by micro-aeration and effluent recirculation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2009; 29:2042-2050. [PMID: 19157839 DOI: 10.1016/j.wasman.2008.12.023] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 12/12/2008] [Accepted: 12/15/2008] [Indexed: 05/27/2023]
Abstract
In this study, the effects of micro-aeration and liquid recirculation on the hydrolysis of vegetable and flower wastes during two-phase solid-liquid anaerobic digestion were assessed. To accomplish this, we evaluated the hydrolysis of five batches of waste that were treated under the following conditions: anaerobic, insufficient micro-aeration (aeration for 5 min every 24 h), and sufficient micro-aeration (aeration for 5 min every 12, 4 and 1h). Hydrolysis was found to depend on the level of micro-aeration. Specifically, insufficient micro-aeration led to unstable and decreased performance. Conversely, sufficient micro-aeration promoted the hydrolysis of easily biodegradable carbohydrates and proteins, but the microbial activity was later impaired by liquid recirculation using methanogenic effluent. The hydrolysis efficiency under anaerobic conditions was comparable to the efficiency observed under sufficient micro-aeration, while the cumulative TOC of the anaerobic batch was 1.4-2.4 times higher than that of the micro-aerated batches. In addition, liquid recirculation did not have a negative effect on the development of microbial activity under anaerobic conditions, which resulted in the lignocelluloses having a higher hydrolysis efficiency.
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Affiliation(s)
- Min Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
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27
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Detoxification requirements for bioconversion of softwood dilute acid hydrolyzates to succinic acid. Enzyme Microb Technol 2009. [DOI: 10.1016/j.enzmictec.2008.11.007] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Okuda N, Soneura M, Ninomiya K, Katakura Y, Shioya S. Biological detoxification of waste house wood hydrolysate using Ureibacillus thermosphaericus for bioethanol production. J Biosci Bioeng 2008; 106:128-33. [PMID: 18804054 DOI: 10.1263/jbb.106.128] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2007] [Accepted: 04/30/2008] [Indexed: 11/17/2022]
Abstract
Hydrolysates of lignocelluloses hydrolyzed by diluted sulfuric acid contain toxic compounds that inhibit ethanol production by Saccharomyces cerevisiae and the ethanologenic recombinant Escherichia coli KO11. We investigated the biological detoxification of a hydrolysate of waste house wood (WHW) by a thermophilic bacterium, Ureibacillus thermosphaericus. When the hydrolysate was treated with this bacterium at 50 degrees C for 24 h, the ethanol production rate by S. cerevisiae increased markedly and was comparable to that for the hydrolysate treated with an excess amount of calcium hydroxide (overliming). Chromatographic analysis of synthetic hydrolysates containing furfural or 5-hydroxymethyl furfural that are considered to be major toxic compounds in hydrolysates revealed that U. thermosphaericus degrades these compounds. In the WHW hydrolysates, however, the concentrations of these compounds were not decreased markedly by the bacterium. These results suggest that the bacterium degrades minor but more toxic compounds or phenolic compounds in the WHW hydrolysates. The combination of bacterial and overliming treatments of hydrolysates minimized significantly the decrease in ethanol production rate by E. coli KO11 as fermentation proceeded. Because the bacterium grows rapidly and does not consume sugars, our biological detoxification should be useful for bioethanol production from acid hydrolysates of lignocelluloses.
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Affiliation(s)
- Naoyuki Okuda
- Sugar & Bio Technology Dept, Tsukishima Kikai Co, Ltd, Tokyo, Japan
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29
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Kobayashi N, Okada N, Hirakawa A, Sato T, Kobayashi J, Hatano S, Itaya Y, Mori S. Characteristics of Solid Residues Obtained from Hot-Compressed-Water Treatment of Woody Biomass. Ind Eng Chem Res 2008. [DOI: 10.1021/ie800870k] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nobusuke Kobayashi
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Nobuhiko Okada
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Ayumu Hirakawa
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Toyoyuki Sato
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Jun Kobayashi
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Shigenobu Hatano
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Yoshinori Itaya
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Shigekatsu Mori
- Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan
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Doran-Peterson J, Cook DM, Brandon SK. Microbial conversion of sugars from plant biomass to lactic acid or ethanol. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2008; 54:582-592. [PMID: 18476865 DOI: 10.1111/j.1365-313x.2008.03480.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Concerns for our environment and unease with our dependence on foreign oil have renewed interest in converting plant biomass into fuels and 'green' chemicals. The volume of plant matter available makes lignocellulose conversion desirable, although no single isolated organism has been shown to depolymerize lignocellulose and efficiently metabolize the resulting sugars into a specific product. This work reviews selected chemicals and fuels that can be produced from microbial fermentation of plant-derived cell-wall sugars and directed engineering for improvement of microbial biocatalysts. Lactic acid and ethanol production are highlighted, with a focus on engineered Escherichia coli.
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Affiliation(s)
- Joy Doran-Peterson
- Microbiology Department, 1000 Cedar Street, 527 Biological Sciences Building, University of Georgia, Athens, GA 30602, USA.
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Okuda N, Ninomiya K, Katakura Y, Shioya S. Strategies for Reducing Supplemental Medium Cost in Bioethanol Production from Waste House Wood Hydrolysate by Ethanologenic Escherichia coli: Inoculum Size Increase and Coculture with Saccharomyces cerevisiae. J Biosci Bioeng 2008; 105:90-6. [DOI: 10.1263/jbb.105.90] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2007] [Accepted: 11/01/2007] [Indexed: 11/17/2022]
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