Sewage treatment method and sewage treatment system

Abstract

The invention relates to a sewage treatment method and a sewage treatment system and in particular relates to a domestic sewage treatment method and a sewage treatment system. Compared with an existing sewage treatment process, the sewage treatment process disclosed by the invention cancels components such as fine grids, sand settling ponds or secondary sedimentation tanks and procedures such as sludge thickening and sludge disposal in an existing sewage treatment process, simplifies the treatment procedures, is beneficial for control and management, is low in operation cost and is applicable to sewage treatment plants in villages and towns, and moreover the quality of treated effluent can meet the first class A standard or standard of recyclable water according to demands. The sewage treatment system adopts modularization design, industrialized production and modularization mounting, is simple in civil construction, short in engineering construction period, simple to operate and control, small in occupied area and small in number of expected operation personnel; various treatment function sections can be flexibly combined according to practical demands according to different qualities and amounts of sewage.

Description

technical field [0001] The invention relates to a sewage treatment method and a sewage treatment system, in particular to a domestic sewage treatment method and a sewage treatment system. Background technique [0002] With the promotion of new-type urbanization in the country and the adjustment of industrial structure, a large number of small towns with economic development zones and industrial parks have been formed. The supporting treatment of domestic sewage in small towns is becoming more and more important. However, the sewage collection pipe network of these small towns is not Sound and lack of sewage treatment facilities have seriously affected the local water environment. The sewage has the characteristics of irregular discharge, large changes in water quality and quantity, and some special industrial wastewater enters. [0003] At present, the vast majority of township domestic sewage treatment processes follow the treatment process of urban sewage plants, but thes...

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Problems solved by technology

However, these technologies have been applied to township sewage, and a considerable number of township sewage plants are not in good condition. The main problems are: ①The on-site construction period is long, and the one-time construction investment is large; ②Due to the imperfect collection pipe network, after construction, The treatment facilities cannot reach full load operation for a long period of time, and there is a phenomenon of waste of resources; ③The power consumption of operation is too high, and the power consumption is mainly concentrated in the water inlet pump room for lifting sewage and the aeration system for secondary treatment. It accounts for more than 70% of the energy consumption of the whole plant; ④The process section is long, the management, operation and maintenance are complicated, and the ordinary activated sludge method, oxidation ditch and A 2 O The process is complicated, the process is long, and the management is difficult; the SBR process is simple, but the degree of self-control is high. Due to the lack of professionals in towns and villages, the operation of sewage plants is often not ideal

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