Study On Reuse Of Decentralized Sewage By Electrochemistry

With the development of economic and living standards,the demand for water resources and emissions are gradually increasing,the pollution of water is also obvious.Decentralized sewage as one of the most important water sources,has a good prospects.At present,the water treatment technology is not yet mature,and the existing sewage treatment technology is difficult to achieve.Therefore,the main method used in this paper is electrochemical oxidation technology,which is known as environmentally friendly technology.It can be used to simplify the traditional sewage treatment process,and to achieve the purpose of rapid processing and reuse.This paper mainly deals with the degradation of COD,NH4+ and TP.Based on the characteristics of electrochemical water treatment and its reaction mechanism,this paper explored the influence of the process and the optimum reaction condition.The results show that the treatment has a good effect on the sewage,and the reuse of decentralized waste-water can be achieved.Time and voltage have an effect on the removal of TP.The removal of TP is increased with the time,which can finish the degradation within 30 minutes.When the voltage is 5V,TP will be completely removed;Degradation of COD shows that cathode materials,electrode spacing,voltage,chloride ions and magnetic Fe3O4 have an effect on this process.Reducing the spacing is good for the degradation.Cl-can promote it and improve its removal rate.The amount of Cl-can promote the degradation of pollutants and improve the removal rate of COD.The addition of Fe3O4 contributes to the removal of COD.When the dosage of Fe3O4 is 80mg/L,the removal rate is up to 70%.The removal of NH4+ is limited,while Cl-and alkaline conditions can promote it.The experimental results show that when the voltage is 8V,the distance is 15mm,the dosage of Fe3O4 is 50mg/L and Cl-is 5000mg/L,and the treated urban sewage can meet the requirements of the reuse of the reclaimed water.