Experimental Study on The Oxidative Degradation of RO Concentrated Water by Ti/IrO2-RuO2 Electrode

Abstract

Advanced treatment and reuse of wastewater is an effective way to solve the shortage of water resources in China. The advantages of RO Technology, such as better water quality and lower operating cost, have become the mainstream desalination technology for wastewater reuse. However, RO technology will produce a certain amount of concentrated water, which contains a large number of inorganic salts and soluble refractory organics. The efficient removal of refractory organics in this high salinity system has become the main bottleneck and problem faced by RO technology. In view of the difficulty of further biochemical treatment of the concentrated water in the RO unit of a sewage treatment plant, the electrochemical method is used to treat the concentrated water. The effects of electrode spacing, current density and reaction time on the treatment of RO concentrated water were discussed. The optimal operation parameters for the treatment of 300ml of the wastewater are as follows: plate spacing 1.5cm, current density 300A/m2, reaction time 20min. Under the above conditions, the COD removal rate can reach 95%, and the lower the initial COD value, the higher the degradation efficiency.