上流式单室无膜微生物燃料电池处理偶氮染料废水

Treatment of azo dyes wastewater using upflow single-chamber membrane-less microbial fuel cell

为分析偶氮染料AB1废水的处理效果及产电性能,构建了单室无膜微生物燃料电池(MFC)系统,考察不同AB1质量浓度下偶氮染料AB1废水的COD去除率及库伦效率。140 d的运行数据表明:由于AB1与阴极之间的电子接收存在竞争关系,MFC系统的产能及功率密度会随AB1质量浓度的升高而降低。当AB1质量浓度为25 mg/L时,MFC系统对废水COD去除率可高达(95.5±1.5)%,且库伦效率为6.6%。MFC系统对AB1具有较高的降解效率,在进水AB1质量浓度25和50 mg/L的条件下,系统出水AB1质量浓度均低于1.5 mg/L。AB1中的NN基团和萘基基本被去除,而苯基几乎无法被去除。

This paper is an attempt to analyze the treatment effect and power generation performance of azo dye AB1 wastewater.The study investigates the COD removal rate and coulombic efficiency of azo dye AB1 wastewater at different AB1 concentration by constructing a single-chamber membraneless microbial fuel cell(MFC)system.The operation data of 140 days show that the competitive relationship of electron acceptance between AB1 and the cathode is responsible for a decrease in the energy generation and power density of the MFC system as the AB1 concentration increases;in the presence of the AB1 concentration of 25 mg/L,MFC system enables the wastewater COD removal rate of up to(95.5±1.5)%,and the Coulomb efficiency of 6.6%;and the MFC system provides a higher degradation efficiency for AB1,with the result that the influent AB1 concentration of 25 and 50 mg/L results in the system effluent AB1 concentration lower than 1.5 mg/L and theNNgroup and naphthyl group in AB1 are basically removed,but the phenyl group defies removal.