期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 43, 期 23, 页码 9038-9042出版社
AMER CHEMICAL SOC
DOI: 10.1021/es901939r
关键词
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资金
- Dutch Ministry of Economic Affairs
- city of Leeuwarden
- Province of Fryslan
- European Union European Regional Development Fund
- EZ/KOMPAS program of the Samenwerkingsverband Noord-Nederland
Scaling up microbial fuel cells (MFCs) is inevitable when power outputs have to be obtained that can power electrical devices other than small sensors. This research has used a bipolar plate MFC stack of four cells with a total working volume of 20 L and a total membrane surface area of 2 m(2). The cathode limited MFC performance due to oxygen reduction rate and cell reversal. Furthermore, residence time distribution curves showed that bending membranes resulted in flow paths through which the catholyte could flow from inlet to outlet while leaving the reactants unconverted. The cathode was improved by decreasing the pH, purging pure oxygen, and increasing the flow rate, which resulted in a 13-fold power density increase to 144 W m(-3) and a volumetric resistivity of only 1.2 m Omega m(3) per cell. Both results are major achievements compared to results currently published for laboratory and scaled-up MFCs. When designing a scaled-up MFC, it is important to ensure optimal contact between electrodes and substrate and to minimize the distances between electrodes.
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