Dynamics of Different Bacterial Communities Are Capable of Generating Sustainable Electricity from Microbial Fuel Cells with Organic Waste

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  • Yamamoto Shuji
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Suzuki Kei
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Araki Yoko
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Mochihara Hiroki
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Hosokawa Tetsuya
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Kubota Hiroko
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Chiba Yusuke
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Rubaba Owen
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Tashiro Yosuke
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University
  • Futamata Hiroyuki
    Department of Applied Chemistry and Biological Engineering, Graduate School of Engineering, Shizuoka University

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Other Title
  • Dynamics of different bacterial communities are capable of generating sustainable electricity from microbial fuel cell with organic waste
  • Different communities dynamics are capable of generating sustainable electricity from microbial fuel cell with organic wastes

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Abstract

The relationship between the bacterial communities in anolyte and anode biofilms and the electrochemical properties of microbial fuel cells (MFCs) was investigated when a complex organic waste-decomposing solution was continuously supplied to MFCs as an electron donor. The current density increased gradually and was maintained at approximately 100 to 150 mA m−2. Polarization curve analyses revealed that the maximum power density was 7.4 W m−3 with an internal resistance of 110 Ω. Bacterial community structures in the organic waste-decomposing solution and MFCs differed from each other. Clonal analyses targeting 16S rRNA genes indicated that bacterial communities in the biofilms on MFCs developed to specific communities dominated by novel Geobacter. Multidimensional scaling analyses based on DGGE profiles revealed that bacterial communities in the organic waste-decomposing solution fluctuated and had no dynamic equilibrium. Bacterial communities on the anolyte in MFCs had a dynamic equilibrium with fluctuations, while those of the biofilm converged to the Geobacter-dominated structure. These bacterial community dynamics of MFCs differed from those of control-MFCs under open circuit conditions. These results suggested that bacterial communities in the anolyte and biofilm have a gentle symbiotic system through electron flow, which resulted in the advance of current density from complex organic waste.

Journal

  • Microbes and Environments

    Microbes and Environments 29 (2), 145-153, 2014

    Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles

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