Domestic sewage treatment system and method

Abstract

The invention discloses a domestic sewage treatment system and method. The treatment system comprises a primary treatment box, a secondary treatment box and a disinfection tank, the primary treatmentbox is internally provided with an accumulation area, a filtering area, a settling area and a standing area, and the settling area is internally provided with a medicine kit; an upper fixed plate, a lower throttle plate, an activated carbon accumulation layer and a percolation layer are arranged in the secondary treatment box, an accommodating cavity is disposed in the activated carbon accumulation layer, a flow split box is arranged in the accommodating cavity, a driving motor is arranged at the bottom of the secondary treatment box, and the driving motor is connected to the flow split box through a rotating shaft. The treatment method includes the steps of: (a) primary filtration; (b) precipitation; (c) disinfection; (d) secondary filtration. The treatment system disclosed by the invention is reliable in operation, has high treatment efficiency and good effect, can effectively remove pollutants and impurities in sewage, and reduces the harmfulness of sewage, the treatment method is simple in process, progressive, and is easy to control, the treatment effect is effectively guaranteed, the water quality of the treated sewage is improved, thus facilitating utilization.

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 of 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 the natural world, it will easily cause eutrophication of the water body, causing algae to grow and reproduce in large numbers, and in severe cases, it will cause red tides and algal blooms, which will deteriorate the water quality and pollute the environment. [0003] The treatment methods for domestic sewage in the prior art can generally be classified into two categories in ...

AI Technical Summary

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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