کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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681261 | 1460017 | 2012 | 8 صفحه PDF | دانلود رایگان |
This paper presents data obtained using an indigenous microbial community contained in anaerobic sediments (mud) collected from the shore of the Río 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/m2 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.
.Figure optionsDownload as PowerPoint slideHighlights
► Mud obtained from zones surrounded by marshy vegetation performs better (current).
► Current production seemed to be controlled by diffusion processes.
► The addition of acetate decreased microbial diversity and increased biofilm development.
► An external carbon source (acetate) increased the power generation rate.
Journal: Bioresource Technology - Volume 126, December 2012, Pages 328–335