Sewage double-biomembrane deep treatment technology

Abstract

The invention relates to a sewage double-biomembrane deep treatment technology comprising the steps: sewage enters an anaerobic tank, an anoxic tank and an oxygen maintaining tank after being pretreated by a grid and settled sand, and mud releases phosphorus in the anaerobic tank; the sewage is denitrified in a denitrification mode in the anoxic tank so as to remove most of organic matters; cilium biological fillers are arranged in the oxygen maintaining tank, biomembranes are attached to the cilium, absorb the phosphorus in excess and degrade the partial organic matters; the sewage enters a secondary sedimentation tank to carry out sedimentation treatment through the oxygen maintaining tank and then enters an aeration biological filter tank; granule biological fillers are arranged in the aeration biological filter tank, and the biomembranes are attached to granules, degrade the residual organic matters in the sewage and convert ammonia nitrogen into nitrate nitrogen; one part of the discharged water of the aeration biological filter tank flows back into the anoxic tank, and the other part is discharged; one part of the mud generated by the secondary sedimentation tank back flows into the anoxic tank, and the other part of the mud is discharged out of a system. The sewage double-biomembrane deep treatment technology has the advantages of investment saving, low operation cost, little land occupation and good treatment effect.

Description

technical field [0001] The invention belongs to a sewage advanced treatment process in the field of environmental protection, in particular to a sewage dual-biofilm advanced treatment process for efficient nitrogen and phosphorus removal and resource utilization of sewage. Background technique [0002] With the development of the national economy and society, the problem of water pollution in our country is increasing day by day, especially the shortage of water resources. my country's rivers, lakes and seas are generally polluted, 75% of the country's lakes are eutrophic to varying degrees; 90% of the urban waters are seriously polluted. Water pollution reduces the use function of water bodies and exacerbates the shortage of water resources. At present, my country is one of the 13 water-scarce countries in the world. About half of the more than 600 cities in the country are currently short of water. The aggravation of water pollution has made the shortage of water resource...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of poor denitrification effect and phosphorus removal effect of the existing simultaneous sewage dephosphorization and denitrification process, and to invent a sewage double biofilm that can improve the effect of sewage advanced treatment and meet the requirements of resource utilization Advanced treatment process

Images