Long-term cathode performance and the microbial communities that develop in microbial fuel cells fed different fermentation endproducts
Type
ArticleKAUST Grant Number
KUS-I1-003-13Date
2011-01Permanent link to this record
http://hdl.handle.net/10754/598230
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To better understand how cathode performance and substrates affected communities that evolved in these reactors over long periods of time, microbial fuel cells were operated for more than 1year with individual endproducts of lignocellulose fermentation (acetic acid, formic acid, lactic acid, succinic acid, or ethanol). Large variations in reactor performance were primarily due to the specific substrates, with power densities ranging from 835±21 to 62±1mW/m3. Cathodes performance degraded over time, as shown by an increase in power of up to 26% when the cathode biofilm was removed, and 118% using new cathodes. Communities that developed on the anodes included exoelectrogenic families, such as Rhodobacteraceae, Geobacteraceae, and Peptococcaceae, with the Deltaproteobacteria dominating most reactors. Pelobacter propionicus was the predominant member in reactors fed acetic acid, and it was abundant in several other MFCs. These results provide valuable insights into the effects of long-term MFC operation on reactor performance. © 2010 Elsevier Ltd.Citation
Kiely PD, Rader G, Regan JM, Logan BE (2011) Long-term cathode performance and the microbial communities that develop in microbial fuel cells fed different fermentation endproducts. Bioresource Technology 102: 361–366. Available: http://dx.doi.org/10.1016/j.biortech.2010.05.017.Sponsors
The authors would like to thank Elodie Lalaurette for assisting in the maintenance of the MFCs and Deb Grove at the Penn State Genomics Core Facility - University Park, PA, for DNA sequencing. This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) and the National Renewable Energy Laboratory (RFH-7-77623-01).Publisher
Elsevier BVJournal
Bioresource TechnologyPubMed ID
20570144ae974a485f413a2113503eed53cd6c53
10.1016/j.biortech.2010.05.017
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