Sewage treatment process

Abstract

The invention relates to a sewage treatment process. The sewage treatment process comprises the following steps of: S1, sewage mixing; S2, denitrification nitrogen removal; S3, organic matter degrading; and S4, sludge treatment: mixing the production wastewater of a workshop with domestic sewage and then feeding the mixture into a biochemical treatment system for co-treatment, thus improving the sewage treatment efficiency to a certain extent. A front denitrification biological carbon and nitrogen removal system is adopted as a biochemical treatment system, a denitrification reactor of the process is arranged in front, and a comprehensive reactor for BOD removal and nitrification reactions is arranged behind. Under an aerobic condition, a biological membrane on the surface of a filler carrier enables microorganisms growing on the carrier to be in full contact with easily degradable organic matters in the wastewater under the stirring action of gas generated by an aerator, and the metabolism of the microorganisms is accelerated, so that the degradation of the organic matters and the nitration reaction of ammonia nitrogen are fully realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment process. Background technique [0002] Production and domestic wastewater are directly discharged into rivers or lakes without standard treatment, causing the total amount of pollutants to exceed the self-purification capacity of the water body, resulting in hypoxia and eutrophication of the water body, and the formation of black and odorous water bodies. [0003] If the waste water is discharged directly without treatment, it will cause different properties and different degrees of pollution of the water body, such as excessive ammonia nitrogen, high content of suspended solids and organic matter, and high chemical oxygen demand (COD), which will endanger human health and affect the development of industry and agriculture. Production. [0004] Therefore, the wastewater produced by chemical plants needs to be treated to meet the GB8978-1996 "Integrate...

AI Technical Summary

Problems solved by technology

However, at present, the sewage treatment costs of chemical plants are high, the process is cumbersome, and the removal of ammonia nitrogen impurities and the degradation of organic matter are not ideal. However, the excessive content of ammonia nitrogen and organic matter will cause eutrophication of water bodies and cause danger to the environment.

Images