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System and method for pondage and grading purification of urban pipe network overflow sewage

A purification system and sewage technology, applied in chemical instruments and methods, water/sewage treatment, runoff/rainwater treatment, etc.

Active Publication Date: 2019-01-11
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the above-mentioned in-situ treatment methods can effectively remove suspended solids, colloidal pollutants and phosphorus in sewage, but COD and NH 3 -N concentration is still high, far exceeding the pollutant-holding capacity of the receiving water body

Method used

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  • System and method for pondage and grading purification of urban pipe network overflow sewage
  • System and method for pondage and grading purification of urban pipe network overflow sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the dry season, there is no sewage discharge from the rainwater outlet 1; when it rains, the overflow sewage or mixed sewage discharged from the rainwater outlet 1 is diverted through the diversion well 2. The diversion well 2 is equipped with three outlets, and the opening and closing are controlled by three automatic control gates , the sewage in the early, middle and late stages of rainfall enters the dosing reaction pool 6, the packing purification area 16, and the ecological purification area 121 respectively.

[0029] In the initial stage of rainfall, the sewage discharged from the rainwater outlet 1 is high-concentration sewage, which enters the dosing reaction tank 6 and the sediment storage tank 11 for treatment. Close the inlet gate 4 of the filler purification area, the first inlet gate 5 of the ecological purification area and the inlet gate 15 of the filler purification area, open the inlet gate 3 of the dosing reaction tank, the sewage enters the dosing ...

Embodiment 2

[0037] The difference between this embodiment and the above-mentioned embodiment is that in this embodiment, in the dry season, in addition to processing the sewage stored in the storage tank in the rainy season of the system, the sedimentation storage tank, filler purification area and ecological purification area of ​​the system can also be treated. Purify the sewage mixed into the urban rainwater pipes in the dry season.

Embodiment 3

[0039] The difference between this embodiment and the above-mentioned embodiment is that in this embodiment, in the dry season, in addition to treating the sewage stored in the storage tank in the rainy season of the system, the filler purification area and the ecological purification area of ​​the system can also be used as the side of the river sewage. road purification system.

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Abstract

The invention discloses a system and a method for pondage and grading purification of urban pipe network overflow sewage. The system comprises: a distributing well, wherein the distributing well is respectively communicated with a chemical enhanced treatment unit for treating high-concentration sewage in the early stage of the rain, a biochemical treatment unit for treating medium-concentration sewage in the middle stage of the rain and a pollution-resistant ecological treatment unit for treating sewage in the later stage of the rain through a pipeline, and the pipeline is provided with threecontrolled gates; and a controller for controlling the three controlled gates to automatically switch in different stages of the rain. The overflow sewage is purified in a quality grading manner in different stages, so the system and the method are suitable for the water environment treatment of drainage systems with severe urban overflow sewage and limited land, and have the functions of water purification and landscape upgrading.

Description

technical field [0001] The invention relates to a system and method for regulating, storing, sorting and purifying overflow sewage from urban pipe networks. Background technique [0002] With the acceleration of urbanization in our country, the large-scale expansion of urban areas and the substantial increase of impervious areas such as roads, squares, parking lots, and houses have caused the natural infiltration of rainwater to decrease and the runoff coefficient to increase. Due to the combined rain and sewage drainage system and the imperfect drainage network in some areas in most old towns and cities in my country, sewage overflow often occurs during the rainy season. After urban point source pollution has been gradually controlled, urban combined sewage overflow, as a typical non-point source pollution, has become an important cause of urban water environment pollution and ecological system imbalance. Pollutants discharged into natural water bodies seriously affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/5281C02F3/02C02F3/10C02F3/32C02F9/00C02F2103/001C02F2203/006C02F2301/08C02F2303/14
Inventor 吴述园詹茂华程寒飞甘露李旭陈春霄
Owner HUATIAN ENG & TECH CORP MCC
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