Power Generation by and Microbial Community Structure in Microbial Fuel Cell Treating Animal Wastewater

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  • ICHIHASHI Osamu
    Graduate School of Agricultural Science , Tohoku University River Basin Research Center, Gifu University
  • YAMAMOTO Nozomi
    Graduate School of Agricultural Science , Tohoku University
  • HIROOKA Kayako
    River Basin Research Center, Gifu University

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  • 畜産廃水を用いた微生物燃料電池における発電と微生物群集構造

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Two identical air-cathode single-chamber microbial fuel cells (MFCs) were operated with two different types of animal wastewater. The result showed that the MFC with swine wastewater showed 831 mW·m-2 of power density, while that with dairy wastewater showed 59 mW·m-2. It was shown that the microbial community structures on anode of both reactors were different. The most dominant bacteria on the anode of the MFC with swine wastewater were relative to members of phylum Acidobacteria and that on the anode of the MFC with dairy wastewater were relative to members of phylum Proteobacteria. The dominant species on the anode were different from those of influent wastewater and from cathode microbes. In the MFC with swine wastewater, a large amount of precipitation was observed on the surface of the cathode. The main components of the precipitation were phosphorous and magnesium, and calcium was also contained.

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