Abstract:

Comparison of air-cathode single chamber and double chamber Microbial fuel cells (MFCs) for sulfide-containing wastewater treatment was carried out. It was found that sulfide containing wastewater could be treated based on MFC technology with energy recovery. The maximum open circuit voltage of 897.2 mV and 821.7 mV, maximum power density of 340.0 mW/m ² and 273.8 mW/m ² , and the coulombic efficiency (CE) of 5.6% and 10.7% were realized in the single chamber and double chamber MFCs, respectively, with influent sulfide 100 mg/L and glucose 812 mg/L. Single chamber MFCs had higher performance in electricity output, but double chamber ones had a higher CE. After 72 hours operation of the single chamber MFCs, sulfide and TOC removal efficiencies reached 75.4% and 17.8%, respectively. Results indicate the feasibility of sulfide removal in MFCs and the cathode resistance is recognized as the main limiting factor in the reported system.

Key words: sulfide, single chamber microbial fuel cells, double chamber microbial fuel cells, electricity generation, removal

摘要：

对比研究空气阴极单室与双室微生物燃料电池(MFC)在去除硫化物及产电性能。当硫化物浓度为100 mg/L, 共基质葡萄糖浓度为812 mg/L时, 单室和双室MFC的最大开路电压分别达897.2 mV和821.7 mV, 最大输出功率分别为340.0 mW/m²和273.8 mW/m², 库仑效率分别为5.6%和10.7%, 单室MFC表现出更好的电能输出, 而双室MFC的能量转化效率更高。单室MFC运行72 小时后, 含硫化物废水中的硫化物去除率为 75.4%。含硫化物废水中的有机质也可以得到同步去除, TOC的去除率为17.8%。上述结果表明利用MFC去除硫化物并同步产电是可行的, 阴极是系统的主要限制因素。

关键词: 硫化物, 单室微生物燃料电池, 双室微生物燃料电池, 产电, 去除