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Jul 19, 2019Keywords:
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Main Article Content
Production of bio-electricity through bacterial catalysis in microbial fuel cell running on garri-processing wastewater
Abstract
Two H-type dual-chambered glucose-fed MFC reactors, each with a working volume of 250 ml designated as GPWW (enriched from garri wastewater) and the other as DWW (enriched from domestic wastewater) were constructed under same conditions and the anodes were continuously fed with synthetic medium (SM) at a flow rate of 0.7 ml min-1. An average power density (Pd) of 1.5 ± 1.39 W/m3 for GPWW and 0.6 ± 0.6 W/m3 for DWW was observed in 150 days of operation. The peak biomass density for DWW was significantly (P < 0.05 T-test) higher than that of GPWW by a factor of 2 (8.99mg versus 3.4 BSA/total anode respectively) on day 120 suggesting that more biomass was formed on DWW than GPWW reactor. This indicates that exo-electrogens in DWW reactor directed more of electron flow to cell synthesis rather than to current. The archaea footprints detected on the anodes were limiting factors in current generation. One vital milestone in this study is the discovery of the potential of garri-processing wastewater as a veritable substrate in microbial fuel cell technology.
Keywords: Biomass density, Dissimilatory metal reducing bacteria, Current density, Microbial fuel cell, Power density
