A kind of urban sewage advanced treatment system

Abstract

The invention discloses an urban sewage advanced treatment system. The urban sewage advanced treatment system comprises a sludge-water separation module, a sewage discharge treatment module and a sludge discharge treatment module, wherein the sludge-water separation module enables sewage and sludge to be primarily separated through impurity removal by virtue of a grating, sand setting, primary precipitation, biological treatment and secondary precipitation, sewage after treatment is discharged to the sewage discharge treatment module, and sludge is fed into the sludge discharge treatment module; the sewage discharge treatment module treats the sewage by adopting a physical, chemical or biological method, disinfection and sterilization are carried out, and the sewage is discharged after reaching discharge targets; and the sludge discharge treatment module carries out physical wall breaking through grinding, then chemical wall breaking deodorization is carried out by virtue of a chemical reagent, finally filter pressing and dehydrating are carried out, the sludge is discharged, and the sewage is refluxed to the sewage discharge treatment module. By adopting the urban sewage advanced treatment system, moisture content of the treated sludge is greatly reduced, sludge drying and dehydrating speed is high, effective deodorization and sterilization are realized, the treated sewage can reach A level of first class standard of national sewage discharge standard, and running cost is low.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an advanced treatment system for urban sewage. Background technique [0002] Municipal sewage is all drainage collected through the sewer system, and it is the mixed water of various domestic sewage, industrial wastewater and urban rainfall runoff discharged into the sewer system. Domestic sewage is the water discharged in people's daily life. The water quality of this type of sewage is characterized by high organic matter, such as starch, protein, oil, etc., as well as inorganic matter such as nitrogen, phosphorus, etc. In addition, it also contains pathogenic microorganisms and more of suspended matter. Compared with industrial wastewater, the water quality of domestic sewage is generally more stable and the concentration is lower. Industrial wastewater is the wastewater discharged during the production process, including production process wastewater, circulating co...

AI Technical Summary

Problems solved by technology

High-temperature drying technology produces harmful waste gas such as dioxin during the sludge treatment process, causing secondary pollution to the environment

Using mechanical and ultrasonic technology to break the cell wall, in addition to the large investment in equipment, it also consumes a lot of power during operation

Therefore, the operating cost is high

Using a strong oxidizing agent to break the sludge cell wall, due to the high concentration of sludge with a water content of 80%, it is difficult to fully integrate the agent, the amount of addition is large, and the cost is also high

Due to the addition of chemical agents, it may bring unfavorable factors to the subsequent treatment of sludge

[0008] Therefore, there is an urgent need to provide a new urban sewage treatment system to solve the technical problems of long sludge deodorization time and difficult dehydration reduction during the existing urban sewage treatment

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