双圆筒型微生物燃料电池处理有机废水的应用

文章研究设计了一个无介体的双筒型微生物燃料电池,并利用该电池对猪场模拟废水和实际废水进行处理。文章较为系统地研究了DCMFC的启动特性,并对该过程中COD处理效率和产电能力等各项指标进行了评估与分析。结果表明,DCMFC处理模拟猪场废水和实际废水均能得到较好的效果,COD处理效率分别达77.83%和73.26%,库仑回收率分别达18.89%和21.49%,电池效率分别达39.84%和53.36%,输出功率分别达3.58 mW(143.2 mW/m)2和4.36 mW(174.4 mW/m)2,并获得了30Ω左右的较小内阻值。猪场模拟废水的底物COD去除率和COD浓度随时间变化的规律可以用ExpDec1模型来进行描述,拟合相关系数分别达0.993 28和0.976 56。同样实际猪场废水的底物COD去除率和COD浓度随时间变化的规律也可以用ExpDec1模型来进行描述,拟合相关系数分别达0.996 83和0.997 82。对DCMFC进行极化曲线测试中,该装置可获得最大输出功率3.8 mW(PA=152 mW/m2,I=9.75 mA),拟合开路电压E=704.67 mV,内阻Ri=31.91Ω。。

Application of Double-cylinder Microbial Fuel Cell to Treating Organic Wastewater

A bench scale device of mediator-free double-cylinder microbial fuel cell(MFC) designed by the author was set up for treating simulated and real streams of pig-farm wastewater.COD removal from the wastewater by the experimental MFC device was more than 73%(both for the simulated and the real),and ExpDec1 model was used to depict change of COD substrate and decreasing of COD concentration.Meanwhile the MFC device yielded electrical power of 3.58 mW for the simulated and 4.36 mW for the real wastewater,respectively.Besides,the MFC had a rather small internal resistance of around 30 Ω,and the result of polarization curve test on the double-cylinder MFC showed the maximal output power could reach 3.8 mW with the fitting internal resistance of 31.91 Ω.