Journal
BIORESOURCE TECHNOLOGY
Volume 126, Issue -, Pages 328-335Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.09.060
Keywords
DGGE; Electrogenic bacteria; Microbial fuel cell; Biofilm; Cyclic voltammetry
Funding
- University of Buenos Aires
- National Council for Scientific and Technological Research (CONICET) [PIP 112-200801-00502]
- ANPCyT (Prestamo BID) [PICT 199]
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This paper presents data obtained using an indigenous microbial community contained in anaerobic sediments (mud) collected from the shore of the Rio de La Plata River (South America). After the sedimentary microbial fuel cells were assembled the evolution of current and power vs. time was studied. Two types of commercially available graphite materials were used as electrodes, which differ mainly in shape and size. In some experiments, an external carbon source (acetate) increased the power generation rate. The maximum power density observed in the aforementioned condition was 19.57 +/- 0.35 and 8.72 +/- 1.39 mW/m(2) using rod and graphite disk electrodes, respectively. The better performance of the rod electrodes can be explained, at least in part, by an enhanced rate of mass transport by radial diffusion. DGGE fingerprints were used to study the electrogenic community growing over the electrodes. (C) 2012 Elsevier Ltd. All rights reserved.
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