Treatment of tannery effluent by eletrocatalytic oxidation method
电催化氧化技术处理制革综合废水

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%.