Journal
BIOTECHNOLOGY PROGRESS
Volume 32, Issue 4, Pages 883-890Publisher
WILEY
DOI: 10.1002/btpr.2278
Keywords
microbial fuel cell; COD; long-term; electricity
Funding
- Spanish Government [CTQ2013-49748-EXP]
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In this work, the long-term effects of transient chemical oxygen demands (COD) concentrations over the performance of a microbial fuel cell were studied. From the obtained results, it was observed that the repetitive change in the COD loading rate during 12 h conditioned the behavior of the system during periods of up to 7 days. The main modifications were the enhancement of the COD consumption rate and the exerted current. These enhancements yielded increasing Coulombic efficiencies (CEs) when working with COD concentrations of 300 mg/L, but constant CEs when working with COD concentrations from 900 to 1800 mg/L. This effect could be explained by the higher affinity for the substrate of Geobacter than that of the nonelectrogenic organisms such as Clostridia. (c) 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:883-890, 2016
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