Journal
ELECTROCHIMICA ACTA
Volume 155, Issue -, Pages 327-334Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.12.152
Keywords
Bioelectricity; Mixed-culture; G. sulfurreducens; Microbial fuel cell; Electrochemically active biofilm
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Funding
- National Natural Science Foundation of China [21375107]
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In this paper an efficient mixed-culture microbial biofilm with increased current density by 68.6% (1020.9 +/- 47 mu A cm(-2)) than that on typical culture of Geobacter sulfurreducens biofilm was firstly reported. The insights into the enhanced electricity-producing ability was investigated through evaluating the dependence of limiting current density on electroactive biomass coverage, replacing used growth medium, applying stirring and electron transfer kinetics. It was shown that the enhanced electricity generation ability of the mixed-culture biofilm is from population superiority of active molecules or electron shuttles from the biofilm. This work suggested that the optimized synergistic effect between interspecies in community could significantly improve electricity-producing performance than single strain. This study highlighted the potential synergistic role in special community on electricity generation capability. (C) 2014 Elsevier Ltd. All rights reserved.
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