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Small sewage treatment system with full-buried reinforced concrete structure and treatment method

A sewage treatment system, buried technology, applied in biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Physical filtration and other issues, to achieve the effect of easy discharge, good treatment effect and high structural strength

Pending Publication Date: 2021-12-07
中国市政工程西南设计研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the sewage treatment systems built in rural areas and small towns generally have the characteristics of low integration, single function, large area, and low sewage treatment efficiency.
[0003] Patent CN105502824A discloses an intensive integrated small-scale sewage treatment station. The functional areas of the treatment station adopt an integrated design to save floor space; Increase the processing burden of the subsequent biochemical treatment process. In addition, in the biochemical treatment process, the sewage passes through the anaerobic pool, the anoxic pool and the aerobic pool in one direction, and the treatment efficiency of sewage (or sludge) is not thorough enough.

Method used

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  • Small sewage treatment system with full-buried reinforced concrete structure and treatment method

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Embodiment 1

[0036] This embodiment takes a typical sewage treatment system with a sewage treatment capacity of 250 tons / day as an example to illustrate the structure and working mode of the sewage treatment system of the present invention.

[0037] refer to figure 1 ,lie in figure 1 On the far right is the pretreatment area 2, in which a physical filter device is installed to filter out particulate impurities and oil stains in the sewage, and the downstream of the pretreatment area 2 is connected to the biochemical treatment area 3.

[0038] Specifically, the physical filtering device in the pretreatment area 2 includes a water inlet channel 20 , a grit chamber 21 , a grease trap 22 and a regulating tank 23 , wherein the water inlet channel 20 communicates with a sewage water source through a water inlet pipe 200 .

[0039] In the water inlet channel 20, artificial grilles and mechanical grilles are arranged in sequence along the direction of sewage flow. The artificial grills (pore size...

Embodiment 2

[0055] This embodiment also provides a sewage treatment method for a small-scale sewage treatment system with a fully buried reinforced concrete structure in the first embodiment, including the following steps:

[0056] S1. The sewage flows through the pretreatment area 2, and the sewage entering through the water inlet channel 20 is filtered through the artificial grid and the mechanical grid to filter out the floating matter and large-pore particles in the sewage, and the grit chamber 21 and the grease trap 22 Remove large specific gravity particles and surface oil, reduce the burden of subsequent biochemical treatment through physical filtration, and save the cost of biochemical treatment.

[0057] S2. The sewage flows through the anaerobic pool 30, the anoxic pool 31, the aerobic pool 32, and the membrane pool 33 in the biochemical treatment area 3 in order to denitrify and dephosphorize the sewage, and return the sludge through the first return pipeline 331 to Maintain th...

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Abstract

The invention provides a small sewage treatment system with a full-buried reinforced concrete structure and a treatment method. The sewage treatment system comprises a box body pre-buried underground, and a pretreatment area and a biochemical treatment area which are arranged in the box body, wherein the pretreatment area is provided with a physical filtering device for filtering out particle impurities and oil stains in sewage, and the downstream of the pretreatment area is connected with the biochemical treatment area; the biochemical treatment area comprises an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank through which sewage sequentially flows, a first return pipeline is arranged between the membrane tank and the aerobic tank, so that sludge in the membrane tank flows back to the aerobic tank, and the sludge concentration is adjusted; a second return pipeline is arranged between the aerobic tank and the anoxic tank, so that nitrification liquid in the sewage in the aerobic tank flows back to the anoxic tank for nitrogen removal by denitrification; and the downstream of the membrane tank is also communicated with a disinfection tank. According to the sewage treatment system, sewage treatment is efficient, the pretreatment area and the biochemical treatment area are both arranged in the box body, the occupied area is small, and the appearance landscape is good.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a small-scale sewage treatment system and a treatment method of a fully buried reinforced concrete structure. Background technique [0002] At present, the sewage treatment systems built in rural areas and small towns generally have the characteristics of low integration, single function, large floor area, and low sewage treatment efficiency. [0003] Patent CN105502824A discloses an intensive integrated small-scale sewage treatment station. The functional areas of the treatment station adopt an integrated design to save floor space; Increase the processing burden of the subsequent biochemical treatment process. In addition, in the biochemical treatment process, the sewage passes through the anaerobic pool, the anoxic pool and the aerobic pool in one direction, and the treatment efficiency of sewage (or sludge) is not thorough enough. . [0004] In view of this, it is necessary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/16
CPCC02F9/00C02F1/001C02F3/308C02F3/06C02F3/307C02F3/12C02F1/50C02F1/40C02F2001/007C02F2203/006C02F2303/24C02F2303/14C02F2303/16C02F2303/04C02F2101/16C02F2101/105C02F2303/02C02F2101/30
Inventor 孙政李玉胜白华清王先涛金芷琪陆振飞魏业香贺阳
Owner 中国市政工程西南设计研究总院有限公司
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