Study on Treatment of Secondary Sedimentation Wastewater by Sodium Hypochlorite Oxidation, Activated Carbon Adsorption and Coagulation Precipitation

Abstract

In this paper, COD_Cr index was adopted as the test item, and the wastewater from the secondary sedimentation tank of a sewage treatment plant selected was treated by the method of "sodium hypochlorite oxidation - activated carbon adsorption - coagulation precipitation". The results showed that the removal rate of COD_Cr reached 57.3% by the treatment of "sodium hypochlorite oxidation - activated carbon adsorption - coagulation precipitation". Therefore, this method can improve the removal rate of COD_Cr, can make the wastewater discharging standard, and for the project provides data support to better treatment of industrial wastewater.

Keywords Secondary settling tank; COD_Cr; Fenton oxidation; Sodium hypochlorite oxidation; Treat reach the standard

DOI: 10.7176/CER/11-6-01

Publication date:July 31^st 2019