Research on the capacity for removing ammonia nitrogen from wastewater containing high salinity and high ammonia nitrogen and the capacity for producing chloride by electrolysis in a thermal power plant
Wang Jing;Wang Yuanyuan;Zhao Jianqiang;Pang Shenglin;He Gaoxiang;Mao Jin;Li Yajuan;School of Environmental Science and Engineering,Chang'an University;Xi'an Thermal Power Research Institute Co.,Ltd.;Huaneng Yuhuan Power Plant;
The chlorine-evoluation and oxygen-evolution potentials of four kinds of metal oxide titanium-based DSA anode have been tested by electrochemical experiments,and the Ti/Ru O2-Ir O2(R2) anode has been optimized so as to conduct the electrolysis experiment on wastewater containing high salinity and high ammonia nitrogen. The effects of the factors,such as current density,TDS,pH,pole plate cleaning,etc.,on the ammonia nitrogen removing and chlorine producing processes are studied. The experimental results show that the effect of current density and pole plate cleaning on the average degradation velocity of ammonia nitrogen is relatively large while the effect of pH and TDS of the water sample is relatively small. The electrolysis degradation process of ammonia nitrogen in wastewater containing high salinity conforms to the quasi zero-order reaction kinetics law.