Electron flux and microbial community in microbial fuel cells (open-circuit and closed-circuit modes) and fermentation

A closed-circuit microbial fuel cell (C-MFC) was operated to investigate the electron flux under fed-batch mode, and the results were compared to those of open-circuit MFC (O-MFC) and a fermentation reactor (F-reactor). The current was the largest electron sink (52.7 % of influent SCOD) in C-MFC, wh...

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Bibliographic Details
Published in:Journal of industrial microbiology & biotechnology 2015-07, Vol.42 (7), p.979-983
Main Authors: Yu, Jaecheul, Park, Youghyun, Lee, Taeho
Format: Article
Language:English
Subjects:
Biochemistry
Bioelectric Energy Sources
Bioinformatics
Biomass
Biomedical and Life Sciences
Bioreactors
Biotechnology
Biotechnology Methods
Carbon
Chemical oxygen demand
Chromatography
Denaturing Gradient Gel Electrophoresis
Electricity generation
Electrodes
Electrons
Energy Transfer
Environmental engineering
Fatty Acids, Volatile - metabolism
Fermentation
Fuel cells
Fuel technology
gel electrophoresis
Genetic Engineering
Glucose
Growth conditions
Hydrogen
Inorganic Chemistry
Life Sciences
methane
Methane - biosynthesis
Microbial activity
microbial communities
microbial fuel cells
Microbiology
Microbiota
principal component analysis
Principal components analysis
Reactors
Studies
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Summary:A closed-circuit microbial fuel cell (C-MFC) was operated to investigate the electron flux under fed-batch mode, and the results were compared to those of open-circuit MFC (O-MFC) and a fermentation reactor (F-reactor). The current was the largest electron sink (52.7 % of influent SCOD) in C-MFC, whereas biomass and methane gas were the most significant electron sinks in O-MFC and F-reactor. Interestingly, some of the unknown sink may have accumulated in the electrode of O-MFC. Principal component analysis based on gradient gel electrophoresis profiles showed that the microbial communities were significantly affected by the growth conditions and the presence of electrode, regardless of the circuit connection. Therefore, the electrode and circuit mode might help to control the amount of biomass and enhance the MFC performance.
ISSN:1367-5435
1476-5535
DOI:10.1007/s10295-015-1629-2