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Emmanuel Egbadon, Campbell O. Akujobi, Chris O. Nweke, Wesley Braide +2
This study demonstrates simultaneous bioelectricity generation and swine wastewater treatment using a microbial fuel cell (MFC). The system achieved maximum open circuit voltage of 836 mV, current of 0.49 mA, and power density of 88.45 mW/m², while removing 85.92% COD, 51.74% BOD, and 78.16% organic carbon. Anode biofilms contained exoelectrogenic bacteria including Corynebacterium, Bacillus, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Streptococcus faecalis. Results validate MFC technology for dual-purpose wastewater treatment and renewable energy recovery from agricultural waste.
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This study aimed at the simultaneous treatment of wastewater obtained from swine and generation of bioenergy in form of electricity from the energy stored in the organic component of the wastewater. The Open circuit voltage, current, power density and microbiological and physicochemical parameters were monitored. An initial Open circuit voltage of 516mV, Current of 0.29mA, and Power density of 32.74mW/m 2 were recorded, which increased to give maximum Open Circuit Voltages of 836mV, Current of 0.49mA, and Power density of 88.45mW/m 2 . The results revealed that The Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Organic carbon, Total Soluble solids (TSS), Ammonia, Ammonium and Ammonium-Nitrogen all showed percentage decrease of 85.92%, 51.74%, 78.16%, 98.87%, 55.87%, 55.79% and 55.90% respectively while parameters such as Total Dissolved Solids (TDS), Nitrate, Nitrate-Nitrogen, Phosphates, Phosphorus and Orthophosphates however increased after treatment to give a percentage increase of -273.60%, -131.65%, -134.85%, -168.77%, -159.26%, and -157.03% respectively. Bacteria isolates identified at the biofilms on the anode were Corynebacterium specie , Bacillus specie , Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Streptococcus faecalis . The results from this study further exacerbate the Bioelectricity production as well as wastewater treatment potentials of the Microbial Fuel Cell technology.