Increased Power in Sediment Microbial Fuel Cell: Facilitated Mass Transfer via a Water-Layer Anode Embedded in SedimentReport as inadecuate




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We report a methodology for enhancing the mass transfer at the anode electrode of sediment microbial fuel cells SMFCs, by employing a fabric baffle to create a separate water-layer for installing the anode electrode in sediment. The maximum power in an SMFC with the anode installed in the separate water-layer SMFC-wFB was improved by factor of 6.6 compared to an SMFC having the anode embedded in the sediment SMFC-woFB. The maximum current density in the SMFC-wFB was also 3.9 times higher 220.46 mA-m2 than for the SMFC-woFB. We found that the increased performance in the SMFC-wFB was due to the improved mass transfer rate of organic matter obtained by employing the water-layer during anode installation in the sediment layer. Acetate injection tests revealed that the SMFC-wFB could be applied to natural water bodies in which there is frequent organic contamination, based on the acetate flux from the cathode to the anode.



Author: Yoo Seok Lee, Junyeong An, Bongkyu Kim, HyunJun Park, Jisu Kim, In Seop Chang

Source: http://plos.srce.hr/



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