Electrochemical Oxidation of Ammonia Nitrogen Wastewater Using Ti/RuO2-TiO2-IrO2-SnO2 Electrode
Ti/RuO2-TiO2-IrO2-SnO2电极电解氧化含氨氮废水

Electrochemical oxidation ammonia is a new method of ammonia nitrogen wastewater treatment. A study was undertaken of electrochemical oxidation ammonia wastewater in cycle mobil-electrobath. The anode was Ti/RuO2-TiO2-IrO2-SnO2 expand metal sheet electrode. The cathode was expand metal sheet electrode . The parameters investigated were the optimal available time for the measurement of ammonia nitrogen, flowrate and current density. The energy consumption, anode efficiency and current efficiency were analysed in different current densities. Experimental results show that when the concentration of the chlorine ion was 400mg/L and the initial ammoniac nitrogen concentration was 40 mg/L, the flowrate had little impact on ammonia nitrogen removal, but current density had greater impact. Under the condition with flowrate 600mL/min, current density 20mA/cm2, electrolytic time 90min, ammonia nitrogen removal ratio was 99.37%, the energy consumption was 500 kWh and the anode efficiency was 2.68 h?m2?A per kg NH4+-N removed, instantaneous current efficiency (ICE) was 0.28. Research has shown that electrochemical oxidation ammonia wastewater has better prospects.