Municipal wastewater treatment method

Abstract

The invention relates to the technical field of sewage treatment, aims to the problem that municipal wastewater is hard to recycle or use after common physical filtering, and provides a municipal wastewater treatment method. According to the technical scheme, the method comprises the following steps: S1, performing primary filtering so as to obtain filtered water; S2, adding a flocculant into thefiltered water so as to obtain a flocculant mixed liquid; S3, heating the flocculant mixed liquid till boiling; S4, performing ultraviolet radiation, and performing sterilization and disinfection through vapor; S5, performing condensation; and S6, performing secondary filtering, wherein the flocculant comprises 100 parts of polyacrylamide, 20-25 parts of methylcellulose, 5-10 parts of casein and 0.01-0.02 part of 2-amino isonicotinic acid. The flocculant mixed liquid is heated till boiling to kill a part of bacteria, the vapor is radiated through an ultraviolet lamp, then a good permeation effect is achieved, a very good ultraviolet sterilization and disinfection effect can be achieved, the content of bacterial viruses in final pure water can be greatly reduced, a good sewage treatment effect can be achieved, the treated pure water can be recycled, waste source waste can be reduced, and meanwhile, pollution to the environment and water resources can be reduced.

Description

technical field

[0001] The invention relates to the technical field of sewage treatment, in particular to a municipal sewage treatment method. Background technique

[0002] With the development of society, the population living in the city is getting bigger and bigger, and more and more sewage is produced in people's daily life. If the sewage is directly discharged into the river, it will cause serious pollution to the environment. Therefore, it is necessary to dispose of the sewage It can be discharged or recycled after treatment.

[0003] Because municipal sewage is mixed with kitchen waste such as grease and food residue, it is very suitable for the reproduction of various microorganisms. It usually contains a large number of bacteria and viruses, which makes it difficult to recycle municipal sewage after general physical filtration. So there is still room for improvement. Contents of the invention

[0004] In view of the deficiencies in the prior art, the purpose of ...

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