Low-cost urban sewage treatment method

Abstract

The invention discloses a low-cost urban sewage treatment method which comprises the following steps: (1) urban sewage is discharged into an equipped sewage treatment tank through sewage discharge pipes, an inlet of the sewage treatment tank is provided with a sludge filter screen, and the sewage passes through the sludge filter screen to remove sludge and large impurities; (2) the sewage from which the large sundries are removed flows into a disinfection cavity of the sewage treatment tank, a disinfectant is added into the disinfection cavity for disinfection, and an aeration device is started; (3) the disinfected sewage flows into a pH adjusting cavity, a pH adjusting agent is added into the pH adjusting cavity for adjusting, and an aeration device is started; (4) the adjusted sewage flows into a sewage treatment cavity, a sewage treatment agent is added into the sewage treatment cavity for treatment, an aeration device is started, then the sewage flows into a biodegradation cavity, ferrite is added into the biodegradation cavity, and an aeration device is started; and (5) chlorine is added to the sewage after biological treatment for disinfection, and then the sewage is discharged. The method is simple and easy to implement, can effectively treat sewage, and is low in cost and quick in effect.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a low-cost urban sewage treatment method. Background technique [0002] With the rapid development of the national economy and the continuous expansion of urban population, a large amount of industrial wastewater and domestic sewage are directly discharged into inland rivers. With the increasingly serious environmental pollution, the requirements for the quality of sewage discharge are more stringent. Reuse has far-reaching implications for urban development; [0003] The existing sewage treatment methods include physical treatment, chemical treatment and biological treatment: [0004] Physical treatment is the most primitive water treatment method. It is a method of separating and recovering undissolved suspended pollutants in sewage by means of gravity stratification, centrifugation or filtration. This method is simple and easy to do, but it can only d...

AI Technical Summary

Problems solved by technology

However, this method has long treatment process, large equipment investment, high operating cost, and it is difficult to remove heavy metal ions.

[0007] However, all of the above treatment methods have their disadvantages. The treatment is not up to standard or the treatment effect is not good or the cost is too high and the applicability is poor.

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