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Effects of electron donors and acceptors in generating bioelectrical energy using microbial fuel cells
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 Title & Authors
Effects of electron donors and acceptors in generating bioelectrical energy using microbial fuel cells
Gurung, Anup; Oh, Sang-Eun;
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BACKGROUND: In recent years, microbial fuel cells (MFCs) have emerged as a promising technology for recovering renewable energy from waste biomass, especially wastewater. In this study, the possibility of bioelectricity generation in two chambered mediator-less microbial fuel cells (MFCs) was successfully demonstrated using fermentable and non-fermentable substrates. METHODS AND RESULTS: Two different electron acceptors have been tested in the cathode chamber for the effects of reducing agent on the power generation in MFCs. The average voltages of V and V were achieved with acetate using oxygen and potassium ferricyanide as reducing agent, respectively. Similarly, with glucose the average voltages of V and V were obtained using oxygen and ferricyanide, respectively. Using potassium ferricyanide as the reducing agent, the power output increases by 39 and 43% with acetate and glucose, respectively, as compared to the dissolved oxygen. Slightly higher coulombic efficiency (CE%) was obtained in acetate as compared to MFCs operated with glucose. The maximum power densities of 124 mW/ and 204 mW/ were obtained using dissolved oxygen and , respectively. CONCLUSION(s): This study demonstrates that power generation from the MFCs can be influenced significantly by the different types of catholyte. Relatively higher CE was obtained with . Thus, application of as the catholyte can be vital for scaling uppower generation from the MFCs forreal time applications.
Bioelectricity;mediator less;microbial fuel cell;power density;swine wastewater;
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