Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Electricity generation from surface floating air cathode microbial fuel cell according to the wastewater flow-rate and the ratio of cathode surface area to anode surface area

표면부유 공기양극 미생물연료전지에서 유량 및 전극 면적비에 따른 전력생산 특성

  • 유규선 (전주대학교 토목환경공학과) ;
  • 송영채 (한국해양대학교 환경공학과) ;
  • 우정희 (한국해양대학교 환경공학과) ;
  • 정재우 (경남과학기술대학교 환경공학과) ;
  • 이채영 (수원대학교 토목공학과)
  • Published : 2011.08.15
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Abstract

Surface floating air cathode microbial fuel cell (MFC) having horizontal flow was developed for the application of MFC technology. RVC (Reticulated vitreous carbon) coated with anyline was used as anode electrode and carbon cloth coated with Pt (5.0 g Pt/$m^2$, GDE LT250EW, E-TEK) was used as cathode electrode. As results of continuous operation with changing the flow rate from 4.3 mL/min to 9.5 mL/min, maximum power density of 4.5 W/$m^3$ was acquired at 5.4 mL/min, which was at 0.35 m/hr of flow velocity under anode electrode. When the ratio of cathode surface area to anode surface area($A_c/A_a$) was changed to 1.0, 0.5, and 0.25, the maximum power density of 2.7 W/$m^3$ was shown at the ratio of 1.0. As the ratio decreased from 1.0 to 0.25, the power density also decreased, which is caused by increasing the internal resistance resulted from reducing the surface area to contact with oxygen. Actually, internal resistances of the ratio of 1.0, 0.5, and 0.25 were 63.75${\Omega}$, 142.18${\Omega}$, and 206.12${\Omega}$, respectively.

Keywords

References

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