Exploration of Fenton Oxidation Technology for Treating Coking Wastewater with Reverse Osmosis Concentrate
The reverse osmosis concentrate produced by the coking wastewater treatment system has the characteristics of high salt content and difficult degradation of organic pollutants,and it has become a pain point in the industry because the pollutants are not up to standard.The changes of COD and TOC under different parameters were investigated by orthogonal experiment using Fenton oxidation technology.Multiple sets of parallel experiments show that when the mass ratio of hydrogen peroxide to raw water COD is 4 and the molar ratio of hydrogen peroxide to ferrous ion is 1,the COD removal rate of sewage is the highest and exceeds 70%,which meets the indirect emission standard of table 2 of"Emission Standard of Pollutants for Coking Chemical Industry"(GB16171-2013).Finally,it is demonstrated that secondary Fenton can effectively improve the removal effect of organic pollutants.This study has important engineering guiding value for the treatment of reverse osmosis concentrate,provides a new idea for the treatment of reverse osmosis concentrate of coking wastewater,and also has a certain reference for the removal of concentrate pollutants in other industries.
coal cokingreverse osmosis concentratefentonhigh salt
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