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http://dx.doi.org/10.4491/KSEE.2011.33.3.167

Effect of External Resistance on Electrical Properties of Two-Chamber type Microbial Fuel Cells  

Lee, Myoung-Eun (Department of Environmental Engineering, Green Technology Institute, Gyeongnam National University of Science and Technology)
Jo, Se-Yeon (Department of Environmental Engineering, Green Technology Institute, Gyeongnam National University of Science and Technology)
Chung, Jae-Woo (Department of Environmental Engineering, Green Technology Institute, Gyeongnam National University of Science and Technology)
Song, Young-Chae (Department of Environmental Engineering, Korea Maritime University)
Woo, Jung-Hui (Department of Environmental Engineering, Korea Maritime University)
Yoo, Kyu-Seon (Department of Civil & Environmental Engineering, Jeonju University)
Lee, Chae-Young (Department of Civil Engineering, The University of Suwon)
Publication Information
Journal of Korean Society of Environmental Engineers / v.33, no.3, 2011 , pp. 167-173 More about this Journal
Abstract
The Effects of external resistance on electrical properties such as current density, power density and coulombic efficiency were investigated in two-chamber type MFCs using a ferricyanide as reducing agent. A stable electricity was produced when a constant time elapsed after innoculation of mixed cultures into the anode compartment; voltages from 0.13 to 0.16 V was measured at $50{\Omega}$ of external resistance. When the external resistance was increased, the current density decreased and the power density rapidly increased and then slowly decreased. Big variation of electrical properties was observed in high-current density region due to the concentration loss related with substrate consumption in repeated experiments changing the external resistance. The maximum power density ($175.8mW/m^2$) and coulombic efficiency (46.1%) were obtained at $100{\Omega}$ of the external resistance which is nearest with the internal resistance ($134{\Omega}$) of MFC system.
Keywords
Microbial Fuel Cell; External Resistance; Electrical Properties; Coulombic Efficiency;
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Times Cited By KSCI : 1  (Citation Analysis)
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