Journal
CANADIAN JOURNAL OF MICROBIOLOGY
Volume 60, Issue 11, Pages 753-759Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjm-2014-0389
Keywords
Gram-positive strain; Enterococcus faecalis; extracellular electron transfer; riboflavin; microbial fuel cells
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Funding
- National Natural Science Foundation of China [20873120, 21173184]
- Natural Science Foundation of Jiangsu Province [10KJA610060]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Great attention has been focused on Gram-negative bacteria in the application of microbial fuel cells. In this study, the Gram-positive bacterium Enterococcus faecalis was employed in microbial fuel cells. Bacterial biofilms formed by E. faecalis ZER6 were investigated with respect to electricity production through the riboflavin-shuttled extracellular electron transfer. Trace riboflavin was shown to be essential for transferring electrons derived from the oxidation of glucose outside the peptidoglycan layer in the cell wall of E. faecalis biofilms formed on the surface of electrodes, in the absence of other potential electron mediators (e. g., yeast extract).
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