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Stepped horizontal subsurface flow constructed wetland combined system and application thereof

A horizontal subsurface flow and artificial wetland technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of high construction cost, flat bottom of wetland, and many dead water areas. Achieve the effect of expanding application range, simple construction and low cost

Active Publication Date: 2015-12-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both of these two types of constructed wetlands have the problem that the bottom of the wetland needs to be leveled, which makes wetland construction more difficult and costly
In addition, due to the use of vertical flow, the vertical space of the slope has not been effectively utilized, and there are problems such as the complexity of the water distribution pipe network and the increase in construction costs.
Therefore, it is urgent to invent and design a new type of constructed wetland system that can be applied to slopes to solve problems such as ineffective use of slope space, excessive dead water areas, high construction costs, and excessive construction difficulties.

Method used

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  • Stepped horizontal subsurface flow constructed wetland combined system and application thereof
  • Stepped horizontal subsurface flow constructed wetland combined system and application thereof
  • Stepped horizontal subsurface flow constructed wetland combined system and application thereof

Examples

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Effect test

Embodiment 1

[0052] In this embodiment, a stepped horizontal subsurface flow constructed wetland combination system, such as figure 1 , figure 2 , image 3 As shown, it consists of three levels of rectangular horizontal subsurface flow constructed wetland units 1 and pipe network units 2 that are distributed stepwise from top to bottom according to the slope, and the horizontal subsurface flow constructed wetland units 1 are connected in series. The horizontal subsurface flow constructed wetland unit 1 is composed of a pool body 3 , a matrix 4 and plants 5 . The pool body 3 is composed of the outer wall 6 of the upper and lower level subsurface flow constructed wetland unit 1 , the water inlet retaining wall 71 , the water outlet retaining wall 72 and the pool bottom 8 . The pipe network unit is composed of a water inlet pipe 9, an outlet pipe 10 and a connecting pipe 11 connecting the upper and lower level subsurface flow constructed wetland units 1.

[0053] The system is applied to ...

Embodiment 2

[0061] In this embodiment, a stepped horizontal subsurface flow constructed wetland combination system, such as Figure 5 with Image 6 As shown, it consists of four levels of rectangular horizontal subsurface flow constructed wetland units 1 and pipe network units 2 that are distributed stepwise from top to bottom according to the slope, and the horizontal subsurface flow constructed wetland units 1 are connected in parallel.

[0062] The system is used for the purification treatment of the tail water of the sewage treatment plant in a certain urban river, which uses the tail water of the sewage treatment plant as supplementary water. The constructed wetland system is located on a plane slope near the tailwater outlet, with a slope angle of about 25° and a slope length of about 40m. The artificial wetland treatment system covers an area of ​​260 square meters, and the designed treatment capacity is 100 tons per day. The influent water quality of the wetland design is Class ...

Embodiment 3

[0068] In this embodiment, a stepped horizontal subsurface flow constructed wetland combination system, such as Figure 7 As shown, it consists of four levels of horizontal subsurface flow constructed wetland unit 1 and pipe network unit 2 that are distributed stepwise from top to bottom according to the slope. The horizontal subsurface flow constructed wetland units are connected in parallel, and the pool body is built into a long strip according to the mountain situation.

[0069] The system is used for domestic sewage treatment in a rural residential area. The constructed wetland treatment system is located on the hillside under the sewage outfall, with a slope angle of about 22°. The constructed wetland treatment system covers an area of ​​360 square meters. It is composed of four rectangular horizontal subsurface flow constructed wetland units 1 with an area of ​​30m×3m connected in parallel. The designed treatment capacity is 120 tons per day.

[0070]The pipe network ...

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Abstract

The invention relates to a stepped horizontal subsurface flow constructed wetland combined system and application thereof. The combined system is built along clinoform and comprises multiple stages of stepped horizontal subsurface flow constructed wetland units which are distributed in a stepped mode from top to bottom according to the slope gradient, and a pipe network unit through which all the stages of stepped horizontal subsurface flow constructed wetland units are communicated. The side face water inlet mode is adopted for the stepped horizontal subsurface flow constructed wetland units. Water flow in the stepped horizontal subsurface flow constructed wetland units horizontally flows in the length direction of the stepped horizontal subsurface flow constructed wetland units. Compared with the prior art, the limitation of terrains on application of constructed wetlands is broken through, slope space can be fully used, the structure is simple, construction is easy and convenient, cost is low, the stepped horizontal subsurface flow constructed wetland combined system and application can be widely applied to processing of various types of sewage such as domestic sewage, municipal sewage, industrial wastewater, animal husbandry sewage, agricultural surface resource pollution, surface flow and tail water of sewage treatment plants in slope areas such as mountainous regions, hills and water body banks, and the application range of constructed wetlands is greatly widened.

Description

technical field [0001] The invention belongs to the technical field of ecological engineering, and relates to a stepped horizontal subsurface flow artificial wetland combination system and its application. Background technique [0002] Water pollution is a major environmental problem facing the world today, and it is also one of the most important environmental problems in my country's environmental protection. Due to the long-term intake of various types of sewage, surface water bodies such as rivers, lakes, and reservoirs in my country are generally polluted, resulting in black and odorous water bodies, eutrophication, death of aquatic animals and plants, reduction of biodiversity, and degradation of aquatic ecosystems and many other problems. Serious water pollution not only restricts the availability of various water resources, but also directly affects people's healthy living and sustainable social and economic development. [0003] In recent years, the artificial wetl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 成水平李柱吴娟向东方代嫣然崔娜欣
Owner TONGJI UNIV
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