Journal
BIOMASS & BIOENERGY
Volume 142, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2020.105781
Keywords
Sandwich-type MFC; Gas-transfer membrane; Pure oxygen; Sewage sludge; Algae biomass
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In this study, a new aeration approach was used for cathode by offering an efficient and cost-effective alternative for practical applications of microbial fuel cells. Therefore, a new sandwich type microbial fuel cell was constructed having three chambers (two anodes and one cathode) was constructed. This sandwich type microbial fuel cell was fed with a mixture of sewage sludge and algae biomass (at the ratio of 1:1). The pure oxygen gas was delivered to the cathode by using hydrophobic hollow fiber gas transfer membranes at different gas pressures (2, 4, 6, 8 and 10 psi). The results revealed that this new sandwich type microbial fuel cell achieved a good performance, and the max power density increased from 1448 mW m(-2) to 26680 mW m(-2) with an increase in oxygen pressure from 2 psi to 10 psi. The presence of electrochemically active bacteria-colonization on the anode's surfaces was revealed by microscopic observations and molecular analysis. This study demonstrated the feasibility of using a hollow fiber gas transfer membrane and a mixture of sewage sludge and algae biomass to enhance power production by sandwich type microbial fuel cell.
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