Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume 175, Issue 4, Pages 1879-1891Publisher
HUMANA PRESS INC
DOI: 10.1007/s12010-014-1418-9
Keywords
Citrobacter freundii; Exoelectrogens; Microbial fuel cell; Biofilm; Bioelectricity
Funding
- National Natural Science Foundation of China [30800796, 31272482]
- Fundamental Research Funds for the Central Universities [2014ZG015]
- Program for New Century Excellent Talents in University [NCET-11-0166]
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An electrogenic bacterium, named Citrobacter freundii Z7, was isolated from the anodic biofilm of microbial fuel cell (MFC) inoculated with aerobic sewage sludge. Cyclic voltammetry (CV) analysis exhibited that the strain Z7 had relatively high electrochemical activity. When the strain Z7 was inoculated into MFC, the maximum power density can reach 204.5 mW/m(2) using citrate as electron donor. Series of substrates including glucose, glycerol, lactose, sucrose, and rhammose could be utilized to generate power. CV tests and the addition of anode solution as well as AQDS experiments indicated that the strain Z7 might transfer electrons indirectly via secreted mediators.
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