Municipal wastewater treatment integrated process

Abstract

The invention discloses a municipal wastewater treatment integrated process. The municipal wastewater treatment integrated process comprises the following steps: removing a floating objects and gravels in wastewater through a reinforcing pre-treating unit; performing phosphorus and nitrogen removal on the wastewater treated by the reinforcing pre-treating unit through an A-A-SDBR treating unit; performing deep denitrification on the wastewater treated by the A-A-SDBR treating unit through a DNAF reaction treating unit; performing efficient phosphorus removal and ozone catalytic oxidization onthe wastewater treated by thean DNAF reaction treating unit through a micro-flocculation phosphorous-removal-CAOT advanced oxidization unit; and disinfecting the wastewater treated by the micro-flocculation phosphorous-removal-CAOT advanced oxidization unit through a composite disinfecting unit. The municipal wastewater treatment integrated process can treat municipal wastewater to meet surface water IV-type water quality standards, and avoids water eutrophication, wherein total nitrogen content of outlet water is smaller than 1.5 mg / L, and total phosphorus content of the outlet water is smaller than 0.3 mg / L; and moreover, the treated wastewater can be recycled for industrial non-drinking water and landscape water which is not in contact with a human body, and the process not only reducespollution on environment, andbut also recycles the waster resource.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an integrated municipal sewage treatment process. Background technique [0002] At present, my country's urban population is relatively concentrated, and the amount of urban sewage treatment is large. The effluent of urban sewage treatment plants implements the "Pollutant Discharge Standards for Urban Sewage Treatment Plants". In grade B, the total nitrogen is 20mg / L, and the total phosphorus is 1mg / L. The total phosphorus in the secondary standard is 3mg / L, and there is no requirement for total nitrogen. The total phosphorus in the third-grade standard is 5mg / L, and there is no requirement for total nitrogen. It can be seen that the content of total nitrogen and total phosphorus in the current discharge standard is still very high. These nutrients enter the slow-flowing water bodies such as lakes and rivers in large quantities, causing algae and other plankton to multip...

AI Technical Summary

Problems solved by technology

[0008] For this reason, the present invention provides an integrated municipal sewage treatment process to overcome the problem of low purification efficiency in the prior art

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