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论文类型： 期刊论文

发表时间： 2018-05-15

发表刊物： BIOCHEMICAL ENGINEERING JOURNAL

收录刊物： SCIE、EI

卷号： 133

页面范围： 106-112

ISSN号： 1369-703X

关键字： Microbial fuel cell; Sequencing batch reactor; Acidification; Bi-direction electron transfer; Oxygen exposure

摘要： A novel sequential polarity-inverting microbial fuel cell (MFC) is developed to neutralize anodic acidification and cathodic alkalinization and treat wastewater. The same electrode sequentially experiences anaerobic anode, aerobic cathode and anoxic cathode phases like a SBR (Sequencing Batch Reactor Activated Sludge process), and such two SBR half cells with opposite electrode polarities consist of a complete MFC. The system successfully buffers electrolyte and generates electricity with a maximum power density of 623 +/- 4 mW/m(3). Chemical oxygen demand is completely removed. Three bacteria, Arthrobacter sp., Stenotrophomonas sp. and Sphingobacterium sp., are found on the polarity-inverting electrode, and Arthrobacter sp. is believed to be capable of transferring electrons both to and from electrode. The proof-of-principle of a polarity-inverting MFC described here may offer an opportunity of integrating MFCs into the practical wastewater treating process. (C) 2018 Published by Elsevier B.V.