Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Electricity Production from Fe[III]-reducing Bacterium Geobacter sulfurreducens in Microbial Fuel Cell

미생물 연료전지에서 Fe[III] 환원 미생물 Geobacter sulfurreducens를 이용한 전기 생산

  • Lee, Yu-Jin (Bioenergy Research Center, Korea Institute of Energy Research) ;
  • Oh, You-Kwan (Bioenergy Research Center, Korea Institute of Energy Research) ;
  • Kim, Mi-Sun (Bioenergy Research Center, Korea Institute of Energy Research)
  • 이유진 (한국에너지기술연구원 바이오에너지연구센터) ;
  • 오유관 (한국에너지기술연구원 바이오에너지연구센터) ;
  • 김미선 (한국에너지기술연구원 바이오에너지연구센터)
  • Published : 2008.12.30
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Abstract

Metal-reducing bacterium, Geobacter sulfurreducens is available for mediator-less microbial fuel cell (MFC) because it has biological nanowires(pili) which transfer electrons to outside the cell. In this study, in the anode chamber of the MFC system using G. sulfurreducens, the concentrations of NaCl, sodium phosphate and sodium bicarbonate as electrolytes were mainly optimized for the generation of electricity from acetate. 0.4%(w/v) NaClO and 0.5M $H_2SO_4$ could be utilized for the sterilization of acrylic plates and proton exchange membrane (major construction materials of the MFC reactor), respectively. When NaCl concentration in anode phosphate buffer increased from 5 to 50 mM, power density increased from 6 to $20\;mW/m^2$. However, with increasing sodium phosphate buffer concentration from 5 to 50 mM, power density significantly decreased from 18 to $1\;mW/m^2$. Twenty-four mM sodium bicarbonate did not affect electricity generation as well as pH under 50 mM phosphate buffer condition. Optimized anode chamber of MFC using G. sulfurreducens generated relatively high power density ($20\;mW/m^2$) with the maximum coulombic efficiency (41.3%).

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References

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