Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74522
Title: A review on the bioenergetics of anaerobic microbial metabolism close to the thermodynamic limits and its implications for digestion applications
Authors: Leng, L 
Yang, P 
Singh, S 
Zhuang, H 
Xu, L 
Chen, WH
Dolfing, J
Li, D
Zhang, Y
Zeng, H
Chu, W 
Lee, PH 
Keywords: Anaerobic digestion (AD)
Electron transfer
Kinetics
Syntrophy
Thermodynamics
Issue Date: 2018
Publisher: Elsevier
Source: Bioresource technology, 2018, v. 247, p. 1095-1106 How to cite?
Journal: Bioresource technology 
Abstract: The exploration of the energetics of anaerobic digestion systems can reveal how microorganisms cooperate efficiently for cell growth and methane production, especially under low-substrate conditions. The establishment of a thermodynamically interdependent partnership, called anaerobic syntrophy, allows unfavorable reactions to proceed. Interspecies electron transfer and the concentrations of electron carriers are crucial for maintaining this mutualistic activity. This critical review summarizes the functional microorganisms and syntroph partners, particularly in the metabolic pathways and energy conservation of syntrophs. The kinetics and thermodynamics of propionate degradation to methane, reversibility of the acetate oxidation process, and estimation of microbial growth are summarized. The various routes of interspecies electron transfer, reverse electron transfer, and Poly-β-hydroxyalkanoate formation in the syntrophic community are also reviewed. Finally, promising and critical directions of future research are proposed. Fundamental insight in the activities and interactions involved in AD systems could serve as a guidance for engineered systems optimization and upgrade.
URI: http://hdl.handle.net/10397/74522
ISSN: 0960-8524
EISSN: 1873-2976
DOI: 10.1016/j.biortech.2017.09.103
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