Electro-catalytic oxidation technology was used to treat the concentrated reverse osmosis wastewater from a reclaimed water plant in Yizhuang.The influences of current density,electrolyte mass concentration and electrolysis time on the treatment effect were investigated,and the best treatment conditions were explored.The experimental results showed that the electrolysis effect was poor when the current density was small or large,and the ideal electrolysis effect could be achieved when the current density was 3 000 A·m-2,and the COD removal rate was 60%;the removal rate of COD was increased from 33%to 68%by adding NaCl electrolyte;in the case of continuous electrolysis,the removal rates of COD and ammonia nitrogen were 62%and 96%respectively when electrolysis lasted for 30 min.Prolonging the electrolysis time did not greatly improve the removal rate.
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