A novel MFC configuration, multianode/cathode granular activated carbon MFC (MAC-GACMFC) was developed with multiple graphite rods inserted into the GAC bed as anodes and multiple pieces of carbon cloth as cathodes. The unique feature of the MAC-GACMFC was that it incorporated multiple MFCs into a single unit, which improved the power generation at low operational cost and space occupation. The lab-scale tests showed that the power density of the 4-anode/cathode GACMFCs was four times that of single-electrode GACMFCs. Meanwhile, the 4-anode/cathode GACMFCs exhibited better abilities to operate at high COD concentrations. In addition, electrode distance was the main factor for internal resistance (Rin). The single-electrode GACMFCs with same electrode distance but different cathode areas had the similar Rin, while the Rin varied substantially along the depth of MAC-GACMFCs. Multiple electrodes efficiently increased the capability of organic substrate degradation and electron acceptance, and led to high power generation.

Multi-anode/cathode granular activated carbon microbial fuel cells (MAC-GACMFC): A costeffective design for high power generation from wastewater treatment

239th National Meeting (2010)

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