Domestic sewage treatment device and treatment method thereof

Abstract

The invention discloses a domestic sewage treatment device and a treatment method thereof, and belongs to the technical field of sewage treatment. The device comprises an aerated grit chamber, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a reaction sedimentation tank which are connected in sequence, wherein the secondary sedimentation tank is provided with a sludge reflux pipe connected with the anaerobic tank and the anoxic tank, the sludge reflux pipe comprises a branch pipe connected with the anaerobic tank and a branch pipe connected with the anoxic tank, the first branch pipe is provided with a first electromagnetic valve for adjusting the opening degree, the second branch pipe is provided with a second electromagnetic valve for adjusting the opening degree, the aerated grit chamber comprises a circular chamber body, a water inlet, a water outlet, more than one aeration pipe and a sand collecting tank arranged at the bottom of the circular chamber body, the aeration pipes are annularly distributed by taking the circle center of the circular chamber body as the center, the water inlet is formed in the side wall of the circular chamber body in the tangential direction, and the water outlet is formed in the side wall of the circular tank body and is perpendicular to the water inlet. The device of the invention is more thorough in desilting, various in treatment mode and convenient for outward transportation of sludge, and meets the sewage treatment requirements.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a domestic sewage treatment device and a treatment method thereof. Background technique [0002] Domestic sewage is relatively common in sewage treatment. The components of domestic sewage are complex, often containing many organic pollutants and suspended particles, the water quality fluctuates greatly, and the sewage discharge volume is large. The problem of its treatment has attracted attention at home and abroad; Anaerobic-anoxic-aerobic method) is a commonly used sewage treatment process, which can be used for secondary sewage treatment or tertiary sewage treatment, as well as reclaimed water reuse, and has good nitrogen and phosphorus removal effects; the existing A2O There are still many suspended particles in the sewage in the front-end grit chamber treatment process, which increases the difficulty of subsequent treatment, and the sludge treatment aft...

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Problems solved by technology

[0003] Purpose of the invention: Aiming at the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a domestic sewage treatment device and its treatment method to solve the problem of incomplete sand settling, suspended particles, and single sewage treatment method in the sewage treatment process. , Inconvenient treatment of sludge at the back end of the process and other technical problems

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