Electrochemical oxidation of ammonia-containing wastewater using Ti/RuO2-Pt electrode

摘要

cqvip:The electrochemical oxidation degradation processes for artificial and actual wastewater containing ammonia were carried out with a Ti/RuO2-Pt anode and a Ti plate cathode.We studied the effects of different current densities,space sizes between the two electrodes,and amounts of added NaCl on ammonia-containing wastewater treatment.It was shown that,after a 30-min treatment under the optimal conditions,which were a current density of 20mA/cm2,a space size between the two electrodes of 1cm,and an added amount of 0.5g/L of NaCl,the COD concentration in municipal wastewater was 40 mg/L,a removal rate of 90%;and the NH3-N concentration was 7mg/L,a removal rate of 88.3%.The effluent of municipal wastewater qualified for Class A of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB18918-2002).