Purifying process of domestic sewage in residential centralized area

A domestic sewage and purification process technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high infrastructure cost and large floor area

Inactive Publication Date: 2013-12-18
TIANJIN BEIFANG LANDSCAPE ECOLOGY INST OF SCI & TECH
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Therefore, this treatment process has the characterist

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  • Purifying process of domestic sewage in residential centralized area

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[0011] The domestic sewage in the concentrated residential area directly enters the septic tank, in which the bulk organic matter in the sewage is precipitated and decomposed, and the upper layer of hydrate enters the grid tank along with the pipeline. There is a grid in the grid pool, and the material of the grid is stainless steel bars with a diameter of 8mm, and the gap between the steel bars is 15mm. The sewage enters the anaerobic biological pool after sedimentation in the grid pool. The anaerobic pool is rectangular in shape, and two retaining walls are set inside to divide it into three parts on average. In the center of the retaining wall, there are four water outlets with a diameter of 15cm. The biological hydraulic retention time of the anaerobic pond is 30 hours. After the sewage passes through the anaerobic biological tank, the water enters the acidification aeration tank, and the hydraulic retention time of the acidification aeration tank is 24h. There is elastic...

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Abstract

The invention relates to a purifying process of domestic sewage in a residential centralized area. The purifying process is composed of a plurality of parts: a septic tank, a bar screen tank, an anaerobic biological tank, an acidification aeration tank, a sedimentation tank and a constructed wetland. The purifying process has high sewage purification efficiency, can effectively reduce the contents of BOD and COD in the sewage, has small occupied area and low running cost, and is not limited by air temperatures. The purifying process can be widely applied in rural domestic sewage treatment, small town domestic sewage treatment and tourist area sewage treatment.

Description

technical field [0001] The invention relates to a process for treating domestic sewage, in particular to a process for purifying domestic sewage in concentrated residential areas. Background technique [0002] With the acceleration of my country's urbanization process and the continuous improvement of people's living standards, small towns, small tourist attractions and tourist areas continue to emerge across the country. The domestic sewage in these small towns and small tourist attractions and tourist areas is often discharged directly without treatment, causing serious environmental pollution. [0003] At present, the main treatment methods for this type of domestic sewage are: 1. Anaerobic treatment process, mainly using biogas digesters or anaerobic fermentation tanks to treat high-concentration domestic sewage. This treatment method can effectively reduce the COD and BOD content. However, the removal rate of nitrogen and phosphorus content is low. 2. Anaerobic treat...

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Application Information

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IPC IPC(8): C02F9/14
Inventor 苏亚勋王素君李春光
Owner TIANJIN BEIFANG LANDSCAPE ECOLOGY INST OF SCI & TECH
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