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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51840

Title: Enhancement of bioelectricity generation for an air-cathode microbial fuel cell using polyvinyl alcohol-membrane electrode assemblies
Authors: Shu-Hui Liu
Chih-Hung Wu
Chi-Wen Lin
Contributors: 國立臺灣海洋大學:地球科學研究所
Keywords: Polyvinyl alcohol membrane
Air-cathode microbial fuel cell (AC-MFC)
Ethyl acetate (EA)Electricity generation
Date: 2017-12
Issue Date: 2018-12-27T03:15:50Z
Publisher: Biochemical Engineering Journal
Abstract: Abstract: This study applied polyvinyl alcohol (PVA) film as the air-cathode membrane electrode assembly (MEA) of the microbial fuel cell (MFC) to estimate the electricity generation at various ethyl acetate (EA) concentrations. PVA-MEA can be produced by compressing carbon cloth with PVA hydrogel fabricated by freezing and thawing, and further drying the compressed product. The PVA-MEA thus prepared could serve as an air-cathode. The self-developed PVA-MEA exhibited excellent water absorption (water uptake: 149.4 ± 0.04%) and an excellent swelling ratio (12.15 ± 0.17%), capable of accelerating proton transmission through water molecules to the cathode to participate in the reduction reaction. When the concentration of EA increased from 26.2 mg/L to 1048 mg/L, the biofilm on the anode surface increased from 8 mg biomass/L to 274 mg biomass/L, attaining an average closed-circuit voltage (CCV) of 382–425 mV, an average open-circuit voltage of 468–682 mV, and a maximum power density of 59–143 mW/m2; moreover, the Coulombic efficiency (Ec) was elevated from 0.22% to 13.57%, by approximately 62 times. For the Monod kinetic parameters, the half-saturation constant was 3.74 mg/L, and the maximal CCV output was 425 mV. The PVA-MEA developed in the study could serve as an air-cathode MEA of an AC-MFC without having any modification material added to the cathode surface, achieving maximum voltage output with low concentrations of EA.
Relation: 128 pp.210-217
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51840
Appears in Collections:[應用地球科學研究所] 期刊論文

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