电催化氧化技术处理制革综合废水

选择DSA电极中的钛基掺硼金钢石膜电极(Ti/BDD),用于制革综合废水的电催化氧化处理研究,考察了在不同的电流密度、电压、电解质、pH值和电解时间等因素对COD去除率和电流效率的影响。结果表明,控制电流密度为30mA/cm2,电压为8.0 V,电解质(NaCl)浓度为2.0 g/L,pH为4.0,电催化氧化处理2 h后,废水的COD和NH4+-N的去除率分别达到了83.6%和90.3%,BOD/COD为0.45,比能耗为35.34 kWh/kg COD,电流效率为37%。

Treatment of tannery effluent by eletrocatalytic oxidation method

The eletrocatalytic oxidation method with BDD film electrodes which was one type of dimensionally stable anode(DSA)electrode was used to degrade the pollutants(COD)in the tannery effluent of modified tapioca starch.The effects of current density,voltage,electrolyte,pH value and electrolysis time on the removal efficiency of COD and current efficiency were studied.The results show that,under selected experimental conditions:current density of 30 mA/cm²,voltage of 8.0 V,electrolyte(NaCl)of 2.0 g/L,pH of 4.0,electrolysis time of 2 h later,the removal efficiencies of the COD and NH₄⁺>-N are about 83.6% and 90.3%,respectively,BOD/COD is 0.45,specific energy consumption is 35.34 kWh/kg COD,current efficiency is 37%.