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Method for purifying and processing city non-point source pollution

A technology for non-point source pollution and purification treatment, applied in the field of urban non-point source pollution purification treatment, can solve the problems of complex treatment process, unsatisfactory effect of overflow pollution purification, and high cost, so as to slow down surface runoff and realize ecological landscape benefits and economy. Benefit, the effect of reducing the flood peak

Inactive Publication Date: 2019-02-26
光大水务科技发展(南京)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a purification treatment method for urban non-point source pollution, so as to solve the problem of unsatisfactory purification effect of existing rainwater runoff and overflow pollution of combined pipes, complicated treatment process and high cost. question

Method used

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  • Method for purifying and processing city non-point source pollution
  • Method for purifying and processing city non-point source pollution
  • Method for purifying and processing city non-point source pollution

Examples

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Embodiment 1

[0049] A city's regional initial rainwater treatment project is located in the water accumulation area, with a design scale of 5000m 3 / d. The system processing flow is as follows: the primary rain runoff and CSO polluted water are input from the storage tank with a submersible pump into a set of multi-stage biofilter, which includes water inlet tank 1, pretreatment tank 2, ecological The treatment tank 6 and the water collection tank 8; the pretreatment tank 2 is provided with a water distribution blind pipe 3 and a first gravel layer 10 covering the water distribution blind pipe 3, and the water inlet tank 1 is connected to the pretreatment tank 2 through the water distribution blind pipe 3 pass; the connection between the pretreatment tank 2 and the ecological treatment tank 6 is provided with an overflow weir 5, and the ecological treatment tank 6 is sequentially provided with a medium layer 11 and a second gravel layer 12 along the water flow direction, and the medium lay...

Embodiment 2

[0059] A city's regional initial rainwater treatment project, the design scale is 2×10 4 m 3 / d. The treatment process of the system is as follows: the primary rain runoff and CSO polluted water are sent from the storage tank to the multi-stage biofilter with a submersible pump, and after four sets of multi-stage biofilter pretreatment and water purification treatment, they are discharged into the river as supplementary water , improve the hydrodynamic force of the river. Each system biological filter includes water inlet tank 1, pretreatment tank 2, ecological treatment tank 6 and water collection tank 8 arranged in sequence along the water flow direction; pretreatment tank 2 is provided with water distribution blind pipe 3 and coated water distribution blind pipe 3, the first gravel layer 10, the water inlet tank 1 is connected to the pretreatment tank 2 through the water distribution blind pipe 3; the connection between the pretreatment tank 2 and the ecological treatment...

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Abstract

The invention provides a method for purifying and processing city non-point source pollution. The method comprises following steps: collecting rainfall runoff and / or merging sewage overflowed from pipelines, providing a bio-filter; introducing sewage into the bio-filter; filtering the sewage by the bio-filter to obtain purified water; and recovering and using the purified water. After rainfall runoff and / or merged sewage overflowed from pipelines are processed by the provided method, COD removal rate can reach 80 to 85%; SS removal rate can reach 80 to 90%; NH3-N removal rate can reach 70 to 80%, and TP removal rate can reach 40 to 60%.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a purification treatment method for urban non-point source pollution. Background technique [0002] Urban non-point source pollution refers to the environmental problems caused by rainwater and runoff scouring the urban ground under rainfall conditions, causing pollutants to enter the receiving water body. Due to the strong human activities in the city and the high proportion of impermeable land area, the runoff of the initial rainwater is violent, with a large amount of water and poor water quality, which is sudden and discontinuous. According to the survey, the annual pollution load caused by urban surface runoff is equivalent to the pollution load discharged by sewage treatment plants, and the concentration of suspended pollutants, heavy metals, and hydrocarbons in urban surface runoff water is basically the same in order of magnitude as that of untreated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/001C02F3/302C02F3/32C02F9/00C02F2101/105C02F2101/16C02F2103/001C02F2203/006C02F2209/08C02F2209/10C02F2209/14C02F2301/08
Inventor 阮燕霞蒲文鹏李洪利刘旭王冠平
Owner 光大水务科技发展(南京)有限公司
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