CN112875866A - Ecological wetland system for treating combined sewage and tail water of village and town sewage field station - Google Patents
Ecological wetland system for treating combined sewage and tail water of village and town sewage field station Download PDFInfo
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- CN112875866A CN112875866A CN202110074531.5A CN202110074531A CN112875866A CN 112875866 A CN112875866 A CN 112875866A CN 202110074531 A CN202110074531 A CN 202110074531A CN 112875866 A CN112875866 A CN 112875866A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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Abstract
The invention discloses an ecological wetland system for treating combined sewage and tail water of a village and town sewage station, which comprises: the horizontal subsurface flow wetland and the surface flow wetland are sequentially connected, the front end of the horizontal subsurface flow wetland is provided with a water inlet end for introducing combined sewage and tail water of the village and town sewage field station, and the rear end of the surface flow wetland is a water discharge end; the flow dividing well is connected with the energy dissipation purification tank in sequence, the front end of the flow dividing well is provided with a flow dividing water inlet connected with an overflow port of the combined sewage channel, and a water outlet at the rear end of the energy dissipation purification tank is connected with the surface flow wetland. The diversion and energy dissipation structure of the artificial wetland main body is formed by arranging the diversion well and the energy dissipation purification tank, diversion and energy dissipation treatment is carried out on the rainy season combined flow system sewage, and then the sewage enters the surface flow wetland, so that the problem that the rainy season combined flow system overflow pollution and the tail water of the sewage field station of the villages and small towns are comprehensively treated is well solved, and the problem that the rainy season combined flow system overflow pollution and the tail water of the sewage field station of the villages and small towns are easily washed by rainwater and the ecological wetland is polluted by the rainy season combined flow system overflow is.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to an ecological wetland system for treating combined sewage and tail water of a village and town sewage station.
Background
The village and town sewage station tail water is an important scene of artificial ecological wetland application, and the tail water of the sewage treatment station is treated by utilizing different forms of combination modes of the artificial ecological wetland, so that the effluent quality can be further improved.
The common artificial wetlands comprise: surface flow constructed wetlands (FWS type) horizontal subsurface flow constructed wetlands and subsurface flow constructed wetlands (SFS type); wherein, the surface flow constructed wetland comprises: the artificial wetland is characterized in that sewage flows from the water inlet end to the water outlet end of the tank body horizontally above the surface of the substrate layer. The surface flow type artificial wetland is named as the surface flow type artificial wetland because water capable of flowing freely is arranged above a solid medium, and pollutants are removed by the combined action of the plant and the microorganisms on the surface of the medium. The solid medium is generally a natural medium, such as soil, with little or no artificial filler. Horizontal undercurrent constructed wetland: the artificial wetland is characterized in that sewage flows from the water inlet end to the water outlet end of the tank body horizontally below the surface of the substrate layer. The horizontal undercurrent type artificial wetland is named because sewage flows through the filler horizontally from one end. Compared with the surface flow type artificial wetland, the horizontal subsurface flow type artificial wetland has large hydraulic load and pollution load, good removal effect on pollution indexes such as BOD5, CODCr, SS, heavy metal and the like, and few phenomena of stink and mosquito and fly breeding. Vertical subsurface flow constructed wetland: which means that sewage vertically passes through the artificial wetland of the substrate layer in the tank body. In the vertical flow type artificial wetland, sewage flows to the bottom of the filler from the surface of the wetland vertically by uniformly distributing water on the surface. The intermittent operation is a specific operation mode of the vertical flow type artificial wetland, the pool body is in an unsaturated state, and oxygen can enter the artificial wetland system through atmospheric diffusion and plant transmission. The nitrification capacity of the system is higher than that of a horizontal undercurrent type constructed wetland, and the system can be used for treating sewage with higher ammonia nitrogen content.
No matter the artificial wetland is used alone or combined for treating the tail water of the sewage stations of the villages and the towns, the wetland is easy to be washed by rainwater in rainy season, the structure, the filler and the plants of the ecological wetland are easy to damage, and because most of the tail water of the sewage stations of the villages and the towns are connected with a combined water making channel in rainy season, combined system overflow pollution can cause pollution impact load to the ecological wetland in rainy season, so that the system of the artificial ecological wetland is blocked and damaged, and the like.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide an ecological wetland system for treating the tail water of a village and town sewage station, which can solve the problems that the existing wetland is damaged by rainwater scouring in rainy season and is polluted by combined flow overflow to cause the blockage and damage of the ecological wetland system in the prior art for treating the tail water of the village and town sewage station.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides an ecological wetland system for treating combined sewage and tail water of a village and town sewage station, which comprises:
the system comprises a horizontal subsurface flow wetland, a surface flow wetland, a flow dividing well and an energy dissipation purification tank; wherein the content of the first and second substances,
the horizontal subsurface flow wetland and the surface flow wetland are sequentially connected, the front end of the horizontal subsurface flow wetland is provided with a water inlet end for introducing combined sewage and tail water of the village and town sewage field station, and the rear end of the surface flow wetland is a water discharge end;
the flow dividing well is sequentially connected with the energy dissipation purification tank, a flow dividing water inlet connected with an overflow port of the combined system sewage channel is formed in the front end of the flow dividing well, and a water outlet in the rear end of the energy dissipation purification tank is connected with the surface flow wetland.
According to the technical scheme provided by the invention, the ecological wetland system for treating the tail water of the sewage station of the villages and the towns provided by the embodiment of the invention has the beneficial effects that:
the diversion and energy dissipation structure of the artificial wetland main body is formed by arranging the diversion well and the energy dissipation purification tank, diversion and energy dissipation treatment is carried out on the rainy season combined flow system sewage, and then the sewage enters the surface flow wetland, so that the problem that the rainy season combined flow system overflow pollution and the tail water of the sewage field station of the villages and small towns are comprehensively treated is well solved, and the problem that the rainy season combined flow system overflow pollution and the tail water of the sewage field station of the villages and small towns are easily washed by rainwater and the ecological wetland is polluted by the rainy season combined flow system overflow is.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic view of the structure of an ecological wetland system for treating combined sewage and tail water of a village and town sewage yard according to an embodiment of the invention;
fig. 2 is a schematic layout diagram of an ecological wetland system for treating combined sewage and tail water of a village and town sewage yard according to an embodiment of the invention;
the part names corresponding to the marks in the figure are as follows: 1-horizontal subsurface wetland; 2-surface flow wetland; 3-a diversion well; 4-energy dissipation purification pool; a-the water inlet end of the horizontal subsurface flow wetland; b-a diversion water inlet of the diversion well; c-a water outlet of the energy dissipation purification tank.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an ecological wetland for treating combined sewage and tail water of a village and town sewage yard, comprising:
the system comprises a horizontal subsurface flow wetland, a surface flow wetland, a flow dividing well and an energy dissipation purification tank; wherein the content of the first and second substances,
the horizontal subsurface flow wetland and the surface flow wetland are sequentially connected, the front end of the horizontal subsurface flow wetland is provided with a water inlet end for introducing combined sewage and tail water of the village and town sewage field station, and the rear end of the surface flow wetland is a water discharge end;
the flow dividing well is sequentially connected with the energy dissipation purification tank, a flow dividing water inlet connected with an overflow port of the combined system sewage channel is formed in the front end of the flow dividing well, and a water outlet in the rear end of the energy dissipation purification tank is connected with the surface flow wetland.
Referring to fig. 2, in the ecological wetland system, the diversion wells and the energy dissipation purification tanks are arranged on one side of the surface flow wetland and are arranged in parallel with the horizontal subsurface flow wetland.
In the ecological wetland system, the energy dissipation purification tank is internally provided with large stones and pebbles.
In the ecological wetland system, the water inlet of the flow dividing well is provided with a gate.
The embodiments of the present invention are described in further detail below.
As shown in fig. 1, an embodiment of the present invention provides an ecological wetland system, which mainly adopts a process flow of a horizontal subsurface flow wetland (a horizontal subsurface flow constructed wetland) and a surface flow wetland (a surface flow constructed wetland), and sets a flow dividing well and an energy dissipation purification tank as a flow dividing and energy dissipation structure to prevent heavy rain impact, so as to ensure normal operation of the subsurface flow wetland, when rainwater overflows in rainy days, overflow sewage directly enters the surface flow wetland through the flow dividing well and the energy dissipation purification tank, so that firstly, the surface flow wetland is used for treating the rainwater overflow sewage in rainy seasons, and secondly, the subsurface flow wetland is prevented from being washed by rainwater, so as to ensure stable operation of the wetland.
Examples
Taking a project engineering adopting the ecological wetland system of the invention as an example, the total design area of the ecological wetland system is 918m2The main structure is horizontal subsurface flow wetland plus surface flow wetland, wherein the area of the horizontal subsurface flow wetland is 240m2The surface flow wetland area is 678m2A flow dividing well and an energy dissipation purification tank are arranged and connected between a combined sewage outlet and the surface flow wetland, and the plane arrangement mode is shown in figure 2; wherein, the horizontal subsurface flow wetland treats the tail water of the sewage plant station, and the daily water yield of the sewage plant station is 50m3The hydraulic load of the horizontal subsurface flow wetland is 0.21m3/(m2.d)，NH3N surface load 1.00 g/(m)2D), BOD surface load 2.50 g/(m)2D), TP surface load 0.15 g/(m)2D), the retention time is 3d, and the hydraulic load of the surface flow constructed wetland is 0.07m3/(m2.d)，NH3N surface load 0.11 g/(m)2D), BOD surface load 0.29 g/(m)2D), TP surface load 0.013 g/(m)2D) residence time of 13.5 d. The normal operation of wetland and solved rainy season overflow pollution problem under the heavy rain impact is guaranteed through reposition of redundant personnel and the energy dissipation structure that sets up reposition of redundant personnel well and energy dissipation purification tank, utilizes the gravel to purify the measure and carry out filtration purification to the downspout drainage, intercepts the particulate matter in the rainwater. When the rainfall is large, the large stones and pebbles in the pool play a role in energy dissipation on the drainage of the rainwater pipe, and the rainwater is prevented from scouring the bottom of the pool.
The ecological wetland system of the invention at least has the following beneficial effects: the problem of upgrading tail water of a village and town sewage station can be solved, and when the quality of inlet water is first-grade B, the quality of outlet water can reach the standard of quasi IV-class water; when in rainy season, the stones and pebbles laid in the energy dissipation purification tank can dissipate energy, so that the ecological wetland structure, the filler and the plants are prevented from being damaged by rainwater washing the bottom of the tank; when the rainy season is, the combined overflow sewage of the flow dividing well enters the surface flow wetland through the energy dissipation purification tank for treatment, so that the problem of combined overflow pollution in the rainy season is solved. The ecological wetland system of the invention adopts a flow dividing and energy dissipation structure formed by relatively simple flow dividing wells and energy dissipation purification ponds, and well solves the problem of damage caused by rainwater washing the ecological wetland structure, fillers and plants
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a handle ecological wetland system of confluence system sewage and villages and small towns sewage field station tail water which characterized in that includes:
the system comprises a horizontal subsurface flow wetland, a surface flow wetland, a flow dividing well and an energy dissipation purification tank; wherein the content of the first and second substances,
the horizontal subsurface flow wetland and the surface flow wetland are sequentially connected, the front end of the horizontal subsurface flow wetland is provided with a water inlet end for introducing combined sewage and tail water of the village and town sewage field station, and the rear end of the surface flow wetland is a water discharge end;
the flow dividing well is sequentially connected with the energy dissipation purification tank, a flow dividing water inlet connected with an overflow port of the combined system sewage channel is formed in the front end of the flow dividing well, and a water outlet in the rear end of the energy dissipation purification tank is connected with the surface flow wetland.
2. The ecological wetland system for treating tail water of a village and town sewage station according to claim 1, wherein the diversion well and the energy dissipation purification tank are arranged on one side of the surface flow wetland and are arranged in parallel with the horizontal subsurface flow wetland.
3. The ecological wetland system for treating the tail water of the village and town sewage station according to claim 1 or 2, wherein the energy dissipation purification pond is internally provided with large stones and pebbles.
4. The ecological wetland system for treating the tail water of the village and town sewage station according to claim 1 or 2, wherein the water inlet of the diversion well is provided with a gate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110074531.5A CN112875866A (en) | 2021-01-20 | 2021-01-20 | Ecological wetland system for treating combined sewage and tail water of village and town sewage field station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110074531.5A CN112875866A (en) | 2021-01-20 | 2021-01-20 | Ecological wetland system for treating combined sewage and tail water of village and town sewage field station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212875A (en) * | 2021-12-20 | 2022-03-22 | 北京首创生态环保集团股份有限公司 | System and method suitable for activated sludge process upgrading and reconstruction |
| CN116675345A (en) * | 2023-05-06 | 2023-09-01 | 中节能国祯环保科技股份有限公司 | Sewage treatment plant tail water constructed wetland system and tail water treatment method |
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| CN207958061U (en) * | 2017-12-18 | 2018-10-12 | 重庆大学 | A kind of Mountainous City storm runoff is regulated and stored and rain processing system |
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2021
- 2021-01-20 CN CN202110074531.5A patent/CN112875866A/en active Pending
Patent Citations (5)
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| US5893975A (en) * | 1997-04-23 | 1999-04-13 | Roux Associates, Inc. | Enhanced subsurface flow constructed wetland |
| CN108002653A (en) * | 2017-12-18 | 2018-05-08 | 重庆大学 | A kind of ecotype rainwater setting pot |
| CN207958061U (en) * | 2017-12-18 | 2018-10-12 | 重庆大学 | A kind of Mountainous City storm runoff is regulated and stored and rain processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212875A (en) * | 2021-12-20 | 2022-03-22 | 北京首创生态环保集团股份有限公司 | System and method suitable for activated sludge process upgrading and reconstruction |
| CN116675345A (en) * | 2023-05-06 | 2023-09-01 | 中节能国祯环保科技股份有限公司 | Sewage treatment plant tail water constructed wetland system and tail water treatment method |
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Application publication date: 20210601 |