Evaluation of organic matter removal and electricity generation by using integrated microbial fuel cells for wastewater treatment
Evaluation of organic matter removal and electricity generation by using integrated microbial fuel cells for wastewater treatment
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DOI：
10.1080/09593330.2015.1066874
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发表时间：
2016-01
影响因子：
2.8
通讯作者：
T. Yamashita;M. Ishida;A. Ogino;Hiroshi Yokoyama
中科院分区：
文献类型：
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作者：
T. Yamashita;M. Ishida;A. Ogino;Hiroshi Yokoyama
设计了一种漂浮式一体化微生物燃料电池（Fa-MFC），该电池可以简单地操作和安装在现有的废水池中，用于分解有机物。通过将管状浮子固定到由质子交换膜和空气阴极组成的组件来构建原型电池。为了比较阳极材料，组件中包括碳布阳极或碳刷阳极。将制造的组件漂浮在填充有乙酸盐介质的IL烧杯中。两个反应器以133-181 mg/L/d的速率去除乙酸盐。采用刷状阳极的Fa-MFC产生的最大功率密度（197 mW/m2-阴极面积）是采用布状阳极（119 mW/m2-阴极面积）的Fa-MFC的1.7倍。为了评估Fa-MFC在更现实的底物上的性能，将含有蛋白胨和肉提取物的人工废水置于2-L烧杯中，并将具有刷阳极的Fa-MFC漂浮在烧杯中。Fa-MFC对废水的化学需氧量去除率为465-1029 mg/L/d，最大功率密度为152 mW/m2阴极面积。当Fa-MFC以实际畜禽废水进料时，废水的生物需氧量以45-119 mg/L/d的速率去除，发电量为95 mW/m2-阴极面积。从16 S rRNA基因序列的分析推断，在阳极生物膜中主要检测到与硫还原菌相关的细菌。图形摘要
A floating all-in-one type of microbial fuel cell (Fa-MFC) that allows simple operation and installation in existing wastewater reservoirs for decomposition of organic matter was designed. A prototype cell was constructed by fixing a tubular floater to an assembly composed of a proton-exchange membrane and an air-cathode. To compare anode materials, carbon-cloth anodes or carbon-brush anodes were included in the assembly. The fabricated assemblies were floated in 1-L beakers filled with acetate medium. Both reactors removed acetate at a rate of 133–181 mg/L/d. The Fa-MFC quipped with brush anodes generated a 1.7-fold higher maximum power density (197 mW/m2-cathode area) than did that with cloth anodes (119 mW/m2-cathode area). To evaluate the performance of the Fa-MFCs on more realistic substrates, artificial wastewater, containing peptone and meat extract, was placed in a 2-L beaker, and the Fa-MFC with brush anodes was floated in the beaker. The Fa-MFC removed the chemical oxygen demand of the wastewater at a rate of 465–1029 mg/L/d, and generated a maximum power density of 152 mW/m2-cathode area. When the Fa-MFC was fed with actual livestock wastewater, the biological oxygen demand of the wastewater was removed at a rate of 45–119 mg/L/d, with electricity generation of 95 mW/m2-cathode area. Bacteria related to Geobacter sulfurreducens were predominantly detected in the anode biofilm, as deduced from the analysis of the 16S rRNA gene sequence. GRAPHICAL ABSTRACT