A domestic sewage treatment system and method

Abstract

The invention discloses a domestic sewage treatment system and method. The treatment system includes a primary treatment box, a secondary treatment box and a disinfection pool. The primary treatment box is respectively provided with a stacking area, a filtering area, a sedimentation area and a static area. The sedimentation area There is a medicine box inside; the secondary treatment box is equipped with an upper fixing plate, a lower throttling plate, an activated carbon accumulation layer and a percolation layer. The activated carbon accumulation layer is equipped with a storage chamber, and a shunt box is installed in the storage cavity. The secondary treatment The bottom of the box is provided with a driving motor, which is connected to the shunt box through a rotating shaft; the treatment method includes the following steps: (a) primary filtration; (b) sedimentation; (c) disinfection; (d) secondary filtration. The treatment system in the present invention is reliable in operation, high in treatment efficiency and good in effect, effectively removes pollutants and impurities in sewage, reduces the harmfulness of sewage, and the treatment method is simple in process, step by step, easy to control, effectively guarantees the treatment effect, and improves the treatment effect of sewage. The treated water quality is easy to use.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a domestic sewage treatment system and method. Background technique [0002] Urban domestic sewage mainly comes from households, businesses and urban public facilities, etc. Organic matter is the main pollutant in domestic sewage, such as starch, protein, sugar and vegetable oil. The chemical oxygen demand, biological oxygen demand, total nitrogen and total phosphorus of urban domestic sewage are relatively high. When water with high nitrogen and phosphorus content is discharged into nature, it is easy to cause eutrophication of water bodies, resulting in the growth and reproduction of algae, and in severe cases, red tides and algal blooms, resulting in deterioration of water quality and environmental pollution. [0003] The treatment methods for domestic sewage in the prior art can usually be classified into two categories in terms of process principles: th...

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Problems solved by technology

The natural treatment system has the disadvantages of long cycle, low treatment efficiency, and a large amount of resources. The biological treatment system is not ideal in the actual operation process. The main reason is that the pollutant components in domestic sewage are complex and the water volume changes greatly. The additives added in the treatment process are not conducive to the growth of biological reaction bacteria, so it is difficult to make the wastewater meet the reuse or discharge standards by using these methods

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