DOI: 10.1016/j.watres.2018.05.013
Scopus记录号: 2-s2.0-85047984727
论文题名: Electron bifurcation mechanism and homoacetogenesis explain products yields in mixed culture anaerobic fermentations
作者: Regueira A. ; González-Cabaleiro R. ; Ofiţeru I.D. ; Rodríguez J. ; Lema J.M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 349
结束页码: 356
语种: 英语
英文关键词: Acidogenic fermentation
; Electron bifurcation
; Homoacetogenesis
; Mixed culture
; Stoichiometry
Scopus关键词: Bifurcation (mathematics)
; Electrons
; Metabolism
; Stoichiometry
; Acidogenic fermentation
; Added value products
; Anaerobic fermentation
; Bifurcation mechanisms
; Biochemical mechanisms
; Homoacetogenesis
; Microbial communities
; Mixed cultures
; Fermentation
; ferredoxin
; hydrogen
; propionic acid
; reduced nicotinamide adenine dinucleotide
; glucose
; anaerobic fermentation
; Article
; biosynthesis
; chemical procedures
; decarboxylation
; electron bifurcation
; electron transport
; energy conservation
; glycolysis
; homoacetogenesis
; microbial community
; mixed cell culture
; nonhuman
; oxidation reduction potential
; priority journal
; reduction (chemistry)
; stoichiometry
; anaerobic growth
; bacterium
; electron
; fermentation
; metabolism
; Anaerobiosis
; Bacteria
; Electrons
; Fermentation
; Glucose
; Metabolic Networks and Pathways
英文摘要: Anaerobic fermentation of organic wastes using microbial mixed cultures is a promising avenue to treat residues and obtain added-value products. However, the process has some important limitations that prevented so far any industrial application. One of the main issues is that we are not able to predict reliably the product spectrum (i.e. the stoichiometry of the process) because the complex microbial community behaviour is not completely understood. To address this issue, in this work we propose a new metabolic network of glucose fermentation by microbial mixed cultures that incorporates electron bifurcation and homoacetogenesis. Our methodology uses NADH balances to analyse published experimental data and evaluate the new stoichiometry proposed. Our results prove for the first time the inclusion of electron bifurcation in the metabolic network as a better description of the experimental results. Homoacetogenesis has been used to explain the discrepancies between observed and theoretically predicted yields of gaseous H2 and CO2 and it appears as the best solution among other options studied. Overall, this work supports the consideration of electron bifurcation as an important biochemical mechanism in microbial mixed cultures fermentations and underlines the importance of considering homoacetogenesis when analysing anaerobic fermentations. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112685
Appears in Collections: 气候减缓与适应
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作者单位: Dep. of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Santiago de Compostela, 15782, Spain; School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, 08193, Spain; Khalifa University of Science and Technology Masdar Institute, PO Box 54244, Abu Dhabi, United Arab Emirates
Recommended Citation:
Regueira A.,González-Cabaleiro R.,Ofiţeru I.D.,et al. Electron bifurcation mechanism and homoacetogenesis explain products yields in mixed culture anaerobic fermentations[J]. Water Research,2018-01-01,141