Electrocatalytic oxidation-biochemical coupling method for treating high-salinity high-concentration organic wastewater

Abstract

The invention discloses an electrocatalytic oxidation-biochemical coupling method for treating high-salinity high-concentration organic wastewater and relates to the technical field of sewage treatment. The method comprises the following steps: pretreating high-salinity high-concentration organic wastewater and discharging first-stage organic wastewater; treating the first-stage organic wastewaterin an electrocatalytic oxidation mode and discharging second-stage organic wastewater; biochemically treating the second-stage organic wastewater until the second-stage organic wastewater reaches a standard and is discharged. According to the method disclosed by the invention, electrocatalytic oxidation and a biochemical treatment technology are coupled, so that high-efficient treatment on the high-salinity high-concentration organic wastewater is achieved; furthermore, in an electrocatalytic oxidation process, the characteristic that the concentration of chlorine ions in the high-salinity organic wastewater is high is fully utilized, high-efficient reclamation on the chlorine irons is achieved, and the chlorine ions are activated into chlorine activity free radicals when electrified to degrade pollutants.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for electrocatalytic oxidation-biochemical coupling treatment of high-salt and high-concentration organic wastewater. Background technique [0002] With the development of society and economy, the demand for water resources has increased rapidly, and problems such as water resource pollution have become increasingly serious. my country's high-salt organic wastewater accounts for 5% of the total wastewater, and is still growing at a rate of 2% per year. If high-salt wastewater is discharged directly without treatment, it will destroy the ecological environment of the soil and bring greater pressure to the water environment. Although the country has issued relevant policies and regulations for water environment protection to control sewage discharge and strengthen environmental governance, the treatment effect and efficiency of high-salt wastewater are very limit...

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Problems solved by technology

Commonly used physical and chemical methods mainly include ion exchange method, membrane separation method, incineration method, evaporation method, and Fenton oxidation method, etc.; however, ion exchange method and membrane separation method are easy to cause membrane clogging, and their use is limited because of high cost; The incineration method has certain requiremen

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