An artificial rainwater wetland system for sponge city construction with enhanced pollutant removal

A technology of sponge city and constructed wetland, which is applied in the fields of runoff/rainwater treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of high operating cost, decreased water permeability and difficult maintenance of MBR membrane treatment. problems, to achieve the effect of improving water purification effect, strong resistance to hydraulic shock, convenient maintenance and construction

Active Publication Date: 2022-07-26
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: the fast filter is easy to block, and the MBR membrane treatment has high operating costs and complicated system management
The main disadvantages of this method are: the water pretreatment measures are relatively simple, and the designed wetland system is easy to block
[0006] The existing artificial rainwater wetland technology still has the following shortcomings: there are not many strict pretreatments for rainwater, especially the initial rainwater surface runoff. In the actual use process, some light debris or sand and solid debris on the ground It is easy to flow into the wetland matrix with rainwater, and it is easy to cause blockage of the permeable surface layer during the infiltration process, resulting in a decrease in water permeability, requiring timely flushing and difficult maintenance; and the overall structure of the artificial rainwater wetland has low permeability. High, the ability to remove pollutants is limited, and the ability to remove organic pollutants and nitrogen and phosphorus contained in rainwater needs to be improved

Method used

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  • An artificial rainwater wetland system for sponge city construction with enhanced pollutant removal

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Experimental program
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Effect test

Embodiment 1

[0034] An artificial rainwater wetland system for sponge city construction with enhanced pollutant removal is designed according to the following structural parameters:

[0035] After the initial rainwater surface runoff is discarded, it is discharged into the municipal sewage pipe network (or the combined rainwater and sewage pipe network) for centralized treatment by the sewage treatment plant. The improved volume method abandonment well calculates the design volume of runoff at the initial stage of rainfall according to the runoff thickness of 6mm. A liquid level float switch is installed in the well to control the water inlet valve. When the abandoned well is full, the water inlet valve is closed, and the rainwater flows out directly from the water outlet pipe. The initial rainwater in the abandonment well flows out slowly within 18 hours through the emptying pipe. When the liquid level in the abandonment well is lower than 10%, the valve of the rainwater outlet pipe is cl...

Embodiment 2

[0044] An artificial rainwater wetland system for sponge city construction with enhanced pollutant removal is designed according to the following structural parameters:

[0045] After the initial rainwater surface runoff is discarded, it is discharged into the municipal sewage pipe network (or the combined rainwater and sewage pipe network) for centralized treatment by the sewage treatment plant. The improved volume method abandonment well calculates the design volume of runoff at the initial stage of rainfall according to the runoff thickness of 7mm. A liquid level float switch is installed in the well to control the water inlet valve. When the abandoned well is full, the water inlet valve is closed, and the rainwater flows out directly from the water outlet pipe. The initial rainwater in the abandonment well flows out slowly within 20 hours through the emptying pipe. When the liquid level in the abandonment well is lower than 10%, the valve of the rainwater outlet pipe is cl...

Embodiment 3

[0054] An artificial rainwater wetland system for sponge city construction with enhanced pollutant removal is designed according to the following structural parameters:

[0055] After the initial rainwater surface runoff is discarded, it is discharged into the municipal sewage pipe network (or the combined rainwater and sewage pipe network) for centralized treatment by the sewage treatment plant. The improved volume method abandonment well calculates the design volume of runoff at the initial stage of rainfall according to the runoff thickness of 8mm. A liquid level float switch is installed in the well to control the water inlet valve. When the abandoned well is full, the water inlet valve is closed, and the rainwater flows out directly from the water outlet pipe. The initial rainwater in the abandonment well flows out slowly within 24 hours through the emptying pipe. When the liquid level in the abandonment well is lower than 10%, the valve of the rainwater outlet pipe is cl...

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Abstract

The invention relates to an artificial rainwater wetland system for sponge city construction with enhanced pollutant removal, comprising a water inlet area, a surface flow artificial wetland and a water outlet area arranged in sequence; The surface-flow constructed wetland includes water distribution gabions and a multi-level swamp area composed of a plurality of deep swamp areas and shallow swamp areas. The water outlet area includes a water outlet device and an overflow device. The valve and overflow device include grille, overflow standpipe, overflow branch pipe and water outlet pipe. The overflow standpipe communicates with the overflow branch pipe through the pipeline, and the two form an "H"-shaped structure. The water pipes, the openings at the upper ends of the overflow vertical pipes and the openings at the upper and lower ends of the overflow branch pipes are all provided with grilles. Compared with the prior art, the present invention can avoid blockage of sundries, has strong water permeability of the system, and strong removal ability of pollutants.

Description

technical field [0001] The invention relates to the technical field of artificial rainwater wetlands, in particular to an artificial rainwater wetland system for sponge city construction that enhances the removal of pollutants. Background technique [0002] "Sponge city" refers to a city that, like a sponge, has good "elasticity" in adapting to environmental changes and responding to natural disasters. It can absorb water, store water, seep water, and purify water when it rains. The water is "released" and used. Its essence is to use measures such as "seepage, stagnation, storage, purification, utilization, and drainage" to control the amount of urban rainfall runoff, reduce peaks, reduce pollution and utilize resources. [0003] Constructed rainwater wetland is a kind of artificially constructed, similar to swamp, for runoff water quality control and flood peak flow control by simulating the structure and function of natural wetlands, focusing on rainwater sedimentation, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/30
CPCC02F3/327C02F3/30C02F2103/001
Inventor 王进车生泉谢长坤
Owner SHANGHAI JIAOTONG UNIV
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