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Characteristics of Organic Material Removal and Electricity Generation in Continuously Operated Microbial Fuel Cell  

Kim, Jeong-Gu (Department of Civil and Environmental Engineering, Kumoh National Institute of Technology)
Jeong, Yeon-Koo (Department of Civil and Environmental Engineering, Kumoh National Institute of Technology)
Park, Song-In (Department of Environmental Engineering, Chonnam National University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.18, no.1, 2010 , pp. 57-65 More about this Journal
Abstract
Two types of microbial fuel cells(MFC) were continuously operated using synthetic wastewater. One was conventional two-chambered MFC using proton exchange membrane(PEM-MFC), the other was upflow type membraneless MFC(ML-MFC). Graphite felt was used as a anode in PEM-MFC. In membraneless MFC, two MFCs were operated using porous RVC(reticulated vitreous carbon) as a anode. Graphite felt was used as a cathode in all experiments. In experiment of PEM-MFC, the COD removal rate based on the surface area of anode was about $3.0g/m^2{\cdot}d$ regardless of organic loading rate. And the coulombic efficiency amounted to 22.4~23.4%. The acetic acid used as a fuel was transferred through PEM from the anodic chamber to cathodic chamber. The COD removal rate in ML-MFC were $9.3{\sim}10.1g/m^2{\cdot}d$, which indicated the characteristics of anode had no significant effects on COD removal. Coulombic efficiency were 3.6~3.7 % in both cases of ML-MFC experiments, which were relatively small. It was also observed that the microbial growth in cathodic chamber had an adverse effects on the electricity generation in membraneless MFC.
Keywords
Microbial Fuel cell; Reticulated Vitreous Carbon(RVC); COD removal; Coulombic efficiency; Polarization curve;
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