title: Electron flux and microbial community in microbial fuel cells (open-circuit and closed-circuit modes) and fermentation.
abstract: 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.
authors.affiliation: Department of Energy Environmental Engineering, Silla University, Busan, 617-736, Republic of Korea.
authors.forename: Jaecheul
authors.initials: J
authors.lastname: Yu
authors.forename: Youghyun
authors.initials: Y
authors.lastname: Park
authors.forename: Taeho
authors.initials: T
authors.lastname: Lee
mesh_terms: D001674:Bioelectric Energy Sources; D019149:Bioreactors; D058645:Denaturing Gradient Gel Electrophoresis; D004566:Electrodes; D004735:Energy Transfer; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005285:Fermentation; D008697:Methane / Q000096:biosynthesis; D064307:Microbiota
chemical_list: D005232:Fatty Acids, Volatile; D008697:Methane