Method for removing bio-toxicity of refractory chemical wastewater

Abstract

The invention discloses a method for removing bio-toxicity of refractory chemical wastewater. The method comprises the following steps: S1, adding a certain amount of dilute sulfuric acid into an adjusting tank; S2, adding a certain amount of alkali into the adjusting tank after sewage in an inner cavity of the adjusting tank is discharged into a sedimentation tank; S3, discharging a water source in the sedimentation tank into a reaction tank, adding anaerobic peptic coccus and clostridium; S4, after the reaction in the reaction tank is finished, discharging the sewage in the reaction tank into an oxidation tank; and S5, communicating the oxidation tank with a second sedimentation tank, so that biological sludge and impurities brought out when water is discharged from the oxidation tank flow back into the oxidation tank again, and further clarification of the water quality is ensured. According to the method for removing the bio-toxicity of the refractory chemical wastewater, toxic substances and other chemical oxygen demands in the wastewater can be effectively removed by adding the alkali and the dilute sulfuric acid, the removal rate of the toxicity in the wastewater can be increased, the method not only can achieve standard discharge, but also is more stable in effluent quality compared with other treatment processes.

Description

technical field [0001] The invention relates to the field of removing the biological toxicity of refractory chemical wastewater, in particular to a method for removing the biological toxicity of refractory chemical wastewater. Background technique [0002] Pure water changes its original physical or chemical properties after use, and becomes wastewater containing different types of impurities. Chemical wastewater is process wastewater, cooling water, waste gas washing water, equipment and site washing discharged in chemical production Wastewater such as water, if discharged without treatment, will cause different properties and degrees of pollution of water bodies, thereby endangering human health and affecting industrial and agricultural production. Contents of the invention [0003] The main purpose of the present invention is to provide a method for removing the biological toxicity of refractory chemical wastewater, which can effectively solve the problems in the backgr...

AI Technical Summary

Problems solved by technology

[0002]Pure water changes its original physical or chemical properties after use, and becomes wastewater containing different types of impurities. Chemical wastewater is discharged from chemical production Process wastewater, cooling water, exhaust gas washing water, equipment and site flushing water, etc. If these wastewaters are discharged without treatment, they will cause different properties and degrees of pollution to the water body, thereby endangering human health and affecting the development of industry and agriculture. Production