微生物燃料电池电极对处理OCC废水的作用

Effect of Electrode on the Treatment of OCC Wastewater Using a Microbial Fuel Cell

研究了微生物燃料电池(MFCs)中电子传递和电极面积对OCC废水处理效果的影响。当进水COD_(Cr)为3000 mg/L、电极面积为40 cm2时,MFCs反应器和开路MFCs反应器的COD_(Cr)去除率分别为93.9%和83.7%,阳极微生物的电子传递作用能够促进有机物的降解;当进水COD_(Cr)为2000 mg/L、电极面积分别为40和108 cm2时,MFCs反应器获得的最大功率密度分别为292.4和96.6 m W/m2,优于进水COD_(Cr)为1000和3000 mg/L的MFCs反应器;电极面积越大,产生的输出电压越高,有机物的去除率越高。

The effect of electron transfer and electrode area on the performance of OCC wastewater treatment by microbial fuel cell was studied. When COD_（Cr）concentration in influent was 3000 mg / L,the removal rates of COD_（Cr）in closed circuit and open circuit reactors were93. 9% and 83. 7% respectively after 14 d,and the electron transfer of microorganism in the anode could promote the degradation of organic matter. When COD_（Cr）concentration in influent was 2000 mg / L,electrode areas were 40 and 108 cm2 respectively,the maximum power densities obtained were 292. 4 and 96. 6 m W / m2 respectively,which was better than the reactors where the waste waters with COD_（Cr）concentration of 1000 and 3000 mg / L were treated. The larger the electrode area,the higher the output voltage and removal rate of organic matter,but there was no multiple relationship between the output voltage and the electrode area.