Reduced internal resistance of microbial electrolysis cell (MEC) as factors of configuration and stuffing with granular activated carbon |
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| Authors: | Aijie Wang Wenzong Liu Nanqi Ren Haoyi Cheng Duu-Jong Lee |
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| Affiliation: | a State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China;b School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China;c Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan |
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| Abstract: | With limited external applied voltage, the microbial electrolysis cell (MEC) could produce hydrogen by exoelectrogenic microorganisms. The present study revealed that a cubiod-shaped chamber effectively reduces the distance between electrodes and thereby reduces the internal resistance of the entire cell. With 0.6 V of applied voltage, the cuboid MEC had a columbic efficiency of 33.7%, much higher than that achieved in the H-shaped MEC test (ca. 15%) of comparable size. Filling the anode chamber with granular activated carbon further enhanced the columbic efficiency to 45%. The corresponding hydrogen conversion rate could reach 35%. |
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| Keywords: | Microbial electrolysis cell (MEC) Internal resistance Bio-hydrogen Granular activated carbon (GAC) |
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