Treatment of wastewater containing high concentration ammonia-nitrogen by electrochemical oxidation process

摘要

The simulant wastewater containing high concentration ammonia-nitrogen was treated by electro-chemical oxidation process in intermittent experiment.The influences of different factors including plate distance,current density,chloride ion concentration and initial pH on ammonia-nitrogen and total nitrogen removal were studied.According to the results of the test,the optimal reaction condition was determined as follows:plate distance was 40mm,current density was 90mA/cm2,chloride ion concentration was 8000mg/L,initial pH was 10. Under the above condition,the total nitrogen concentration reduced from 2000 mg/Lto 280mg/L when the reaction time was 8h,and the removal rate reached 86％.As we can see,the effect of the treatment is quite positive.