CN210559648U - Step multi-section undercurrent artificial wet land treating pool - Google Patents
Step multi-section undercurrent artificial wet land treating pool Download PDFInfo
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- CN210559648U CN210559648U CN201921218835.9U CN201921218835U CN210559648U CN 210559648 U CN210559648 U CN 210559648U CN 201921218835 U CN201921218835 U CN 201921218835U CN 210559648 U CN210559648 U CN 210559648U
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Abstract
The utility model discloses a step multi-section undercurrent artificial wetland treatment pool, which comprises a plurality of descending vertical current treatment pools and ascending vertical current treatment pools which are alternately distributed, wherein a step water level difference is formed by the descending vertical current treatment pools and the ascending vertical current treatment pools; the device comprises a vertical flow treatment tank, a water inlet pipe, a water outlet pipe, a. The utility model discloses a down vertical current and the vertical current intercombination that goes upward to design multistage wetland treatment pond for cascaded in order to form the water head, sewage need not power in this system, only relies on the step water head in the pond to promote rivers and gos forward, and the wetland is along the journey to form the multi-functional district of good oxygen, oxygen deficiency, anaerobism simultaneously, multiple microorganism combined action, very big improvement in sewage nitrogen, the effect of getting rid of phosphorus.
Description
Technical Field
The utility model relates to a step multistage undercurrent constructed wetland treatment tank belongs to water restoration technical field.
Background
Along with the continuous development of domestic economy, the rapid development of urbanization and the continuous increase of sewage discharge, the eutrophication condition of lake water bodies in China is continuously serious. In order to solve the above problems, an artificial wetland is proposed and applied, in which the artificial wetland is divided into surface flow and subsurface flow according to the characteristics of water flow, and the subsurface flow is divided into horizontal flow and vertical flow. Although the surface flow wetland system has low construction cost and simple operation, the purification effect is poor and the practical application is not many. The horizontal flow or vertical flow artificial wetland has good purification effect relative to the surface flow artificial wetland, but the control and the operation are relatively complex, the oxygen in the system is limited, and the removal effect on nitrogen and phosphorus is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect, the utility model provides a step multistage undercurrent constructed wetland handles pond, adopt down vertical current and the mutual combination of ascending vertical current, and design multistage wetland handles pond and be cascaded in order to form the water head, sewage need not power in this system, only rely on the step water head in the pond to promote rivers and go forward, compound into an organic whole with multiple undercurrent type and difference in height and multiple water conservancy flow mode, the wetland is along the journey to form good oxygen simultaneously, the oxygen deficiency, the multi-functional district of anaerobism, multiple microorganism combined action, very big improvement in sewage nitrogen, the effect of getting rid of phosphorus.
In order to solve the technical problem, the utility model provides a step multi-section undercurrent artificial wetland treatment tank which is characterized by comprising a plurality of descending vertical current treatment tanks and ascending vertical current treatment tanks which are alternately distributed, wherein a step water level difference is formed by the descending vertical current treatment tanks and the ascending vertical current treatment tanks; the downward vertical flow treatment tank and the upward vertical flow treatment tank are internally provided with packing layers, the bottom of each packing layer is provided with a drain pipe, and an ecological planting layer is arranged above each packing layer; the water discharge pipe between the downstream adjacent upstream vertical flow treatment tank and the water discharge pipe between the downstream adjacent downstream vertical flow treatment tank are not communicated.
Preferably, the descending vertical flow treatment tank and the ascending vertical flow treatment tank are separated by a stepped dividing wall of different heights.
Preferably, a drainage pipeline hole is reserved at the bottom of the step partition wall between the downstream vertical flow treatment tank and the bottom of the downstream adjacent upstream vertical flow treatment tank.
Preferably, the packing layer comprises a water storage layer, a medium soil layer, a non-woven fabric layer, a gravel cushion layer, a composite geomembrane layer, a gray soil layer and a plain soil layer from top to bottom in sequence.
Preferably, the gravel cushion layer is provided with a plurality of layers, the thickness of the gravel cushion layer is gradually increased from bottom to top, and the particle size of the gravel is also gradually increased from bottom to top.
Preferably, the surface of the wall of the downward vertical flow treatment tank and the surface of the wall of the upward vertical flow treatment tank are also provided with a composite geomembrane layer.
Preferably, the drain pipe is a PVC pipe, and a plurality of round holes are arranged on the drain pipe.
The utility model also provides a construction method in step multistage undercurrent constructed wetland treatment tank, characterized by, include:
pool foundation treatment: excavating the pool body, cleaning a base after the excavation is finished, removing floating slag impurities, paving lime soil and tamping;
constructing the pool wall and the step partition wall: the pool wall is poured by concrete; step partition walls with different heights are built in the tank body by adopting bricks, and the tank body is divided into a plurality of alternately distributed downward vertical flow treatment tanks and upward vertical flow treatment tanks;
paving a tank body impermeable membrane: composite geomembranes are paved on the surface of the tank wall and above the lime soil layer at the bottom of the tank body;
laying drainage pipelines: laying drainage pipelines above the composite geomembrane layer at the bottom of the tank body, and uniformly drilling holes on the pipelines; the drainage pipes between the upstream vertical flow treatment tank and the downstream adjacent downstream vertical flow treatment tank are not communicated;
backfilling graded broken stones: uniformly paving a plurality of layers of broken stone fillers with different particle sizes and different thicknesses on the drainage pipeline;
construction of medium soil: paving non-woven fabrics on the gravel filler, and paving a medium soil layer on the non-woven fabrics;
ecological planting: and laying a water storage layer on the medium soil layer, and planting aquatic plants on the water storage layer.
Preferably, a drainage pipeline hole is reserved at the bottom of the step partition wall between the downstream vertical flow treatment tank and the bottom of the downstream adjacent upstream vertical flow treatment tank.
Preferably, the thickness of the gravel cushion layer increases from bottom to top in sequence, and the particle size of the gravel also increases from bottom to top in sequence.
Preferably, the medium soil layer comprises coconut coir, activated alumina, river sand and volcanic sand, and the mass ratio of each component is 2: 1: 7: 2.
the utility model discloses the beneficial effect who reaches:
(1) the system breaks through the traditional single wetland type, adopts the mutual combination of the downward vertical flow and the upward vertical flow, designs the multistage wetland treatment tank into a step type to form water level difference, does not need power in the system, can push water flow to advance only by the step water level difference in the tank, saves energy, and combines various undercurrent types, height difference and various hydraulic flow modes into a whole.
(2) The cascade multi-section undercurrent has a unique multi-flow-direction composite water flow mode, so that the wetland can form a multifunctional area with good oxygen (a water storage layer at the upper part of the packing layer), poor oxygen (a medium soil layer at the middle part of the packing layer) and anaerobic (a broken stone cushion layer at the bottom of the packing layer) along the way, and the removal effect of nitrogen and phosphorus can be greatly improved under the combined action of various microorganisms.
(3) The water supply is uniform, the water flow is not easy to short-circuit, the reoxygenation condition is good, the suspended matters and organic pollutants in the sewage can be effectively removed, and the nitrogen and phosphorus removal effect of the root system of the aquatic plant is stable.
(4) Compared with the traditional single wetland, the stepped multi-section subsurface flow constructed wetland treatment tank has the advantages of low cost, simple maintenance and operation, environmental sanitation, good effluent quality and the like, and is suitable for treating sewage such as industrial pollution, landscape water bodies, water sources for drinking, storm runoff and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the stepped multi-stage subsurface flow constructed wetland treatment tank comprises three alternately distributed descending vertical flow treatment tanks and ascending vertical flow treatment tanks, wherein the descending vertical flow treatment tanks and the ascending vertical flow treatment tanks are separated by stepped partition walls with different heights. The step partition wall divides the tank body into three treatment tanks, wherein the first treatment tank 1 is a descending vertical flow treatment tank, the second treatment tank 2 is an ascending vertical flow treatment tank, and the third treatment tank 3 is a descending vertical flow treatment tank. The height of the first step partition wall 4 and the second step partition wall 5 is 2.5m, the height of the third step partition wall 6 is 1.7m, and the height of the fourth step partition wall 7 is 1m, wherein a drainage pipeline hole is reserved at the bottom of the second step partition wall 5, so that the drainage pipes 16 between the first treatment tank 1 and the second treatment tank 2 are communicated.
And the descending vertical flow treatment tank and the ascending vertical flow treatment tank are internally provided with packing layers, and an ecological planting layer 8 is arranged above the packing layers. The packing layer sequentially comprises a water storage layer 9, a medium soil layer 10, a non-woven fabric layer 11, a broken stone cushion layer 12, a composite geomembrane layer 13, a gray soil layer 14 and a plain soil layer 15 from top to bottom. And the surface of the wall of the downward vertical flow treatment tank and the surface of the wall of the upward vertical flow treatment tank are also provided with a composite geomembrane layer 13. The gravel cushion layer 12 is provided with three layers, the thickness of the three layers of gravel cushion layers is respectively 300 mm, 400 mm and 500 mm from bottom to top, and the particle size of gravel is respectively 4-8 mm, 8-16 mm and 16-32 mm from bottom to top. The medium soil layer comprises coconut chaff, active alumina, river sand and volcano sand, and the mass ratio of each component is 2: 1: 7: 2.
the water draining pipe 16 is arranged at the bottom of the packing layer, the water draining pipe 16 is a PVC pipe, a plurality of round holes with the aperture of 0.6cm are formed in the water draining pipe 16, and the hole distance is 5 cm. The water discharge pipe 16 between the first treating pool 1 and the second treating pool 2 is communicated, and the water discharge pipe 16 between the second treating pool 2 and the third treating pool 3 is not communicated.
A construction method of a step multi-section subsurface flow constructed wetland treatment tank comprises the following steps:
(1) pool foundation treatment: the pond body excavation, the clearance of carrying out the basement after the excavation is accomplished, clear away the dross debris, lay the lime soil and tamp, the lime soil thickness is 100mm, and the lime soil is by hydrated lime and plain soil according to volume ratio 3: 7 are mixed.
(2) Constructing the pool wall and the step partition wall: the pool wall is poured by concrete; step partition walls with different heights are built in the tank body by adopting bricks to divide the tank body into three treatment tanks; the specific construction method comprises the following steps: the tank body is divided into three treatment tanks, four sections of step partition walls are formed from the first treatment tank to the third treatment tank, the height of the first section and the second section is 2.5m, the height of the third section is 1.7m, the height of the fourth section is 1m, and drainage pipeline holes are reserved when the bottom of the step partition wall of the second section is built.
(3) Paving a tank body impermeable membrane: and composite geomembranes are paved on the surface of the tank wall and above the lime soil layer at the bottom of the tank body. The composite geomembrane is paved by two parts, namely bottom pavement and pool wall pavement. Firstly, horizontally rolling and paving along the axis direction of the bottom surface. And after the foundation is qualified by inspection, the pool walls are rolled and paved from one end of the unit to the other end, and the pool walls are connected with the composite geomembrane on the bottom surface in a T-shaped manner. The laying should be carried out in dry weather, and simultaneously in order to facilitate splicing and prevent stress concentration, the laying adopts a wave-shaped relaxation mode, the allowance is about 5 percent, the film is stretched out in time and leveled after being unfolded, and the film is required to be inosculated with the tank wall to be smooth and have no folds.
(4) Laying drainage pipelines: and (3) paving a drainage pipeline above the composite geomembrane layer at the bottom of the tank body, and uniformly drilling holes on the pipeline.
(5) Backfilling graded broken stones: uniformly paving a plurality of layers of broken stone fillers with different particle sizes and different thicknesses on the drainage pipeline; the specific method for backfilling the graded broken stones comprises the following steps: the gravel packing is provided with three layers, the thickness of the gravel packing is respectively 300 mm, 400 mm and 500 mm from bottom to top, and the particle size of the gravel is respectively 4-8 mm, 8-16 mm and 16-32 mm from bottom to top. Before the construction of the gravel filler, the upper part of the impermeable material is covered with a 20mm fine sand protective layer, and the maximum fall of the first layer of gravel construction is not more than 30cm, so that the impermeable material is prevented from being damaged by the rolling of gravel on the film. When the drainage pipeline is paved with the lower-layer gravel filler, the bottom of the pipeline is 50mm higher than the bottom of the first-layer gravel.
(6) Construction of medium soil: non-woven fabrics are laid on the gravel filler to prevent medium soil from being trapped in the gravel. Laying a medium soil layer on the non-woven fabric; the medium soil layer comprises coconut chaff, active alumina, river sand and volcano sand, and the mass ratio of each component is 2: 1: 7: 2. the coconut chaff is natural fiber powder processed from coconut husk. The medium soil has low cost and no adverse effect on the environment, and can meet the growth requirements of various plants. Meanwhile, the granules have stable structures, good moisturizing capability and a considerable removing function on pollutants. The laying thickness of the medium soil is 800mm, the filler is constructed from the periphery to the inside, the material is transported in place by a machine, and the long-arm single-bucket excavator is matched with manpower to uniformly lay the medium soil.
(7) Ecological planting: and laying a water storage layer on the medium soil layer, and planting aquatic plants on the water storage layer. The row spacing of the planted root and seedling is about 20m, the planting depth is used for keeping the main bud close to the mud surface, and meanwhile, 1-3cm of water is irrigated. The bare-rooted seedlings must be planted on the same day. The exposure time of the seedlings in the beginning of lifting is not more than 8 hours, and when the seedlings cannot be planted in the day, the roots spray water. The canna and the yellow flag which are matched in the utility model are hygrophyte species, wherein the canna is a perennial rooting stem herbaceous plant which is warm and moist. The calamus flavus is cold-resistant and drought-resistant, is fond of sufficient sunshine, is ventilated, and has good drainage and wind-sheltering environment. The two plants grow fast in high concentration sewage and can absorb a great amount of nitrogen and phosphorus. Meanwhile, the root system attachment forms a rhizosphere micro-ecosystem, and the physicochemical reactions of degradation, consolidation and the like of pollutants are accelerated.
The utility model discloses step multistage undercurrent constructed wetland treatment tank contains two downflow and an upflow processing unit, designs three processing unit and forms the step, and sewage need not power in this system, only relies on the step water head in the pond to promote rivers and gos forward, has practiced thrift the energy.
The sewage flows downwards through a first treatment pool (a downward vertical flow treatment pool) and passes through a packing layer, is collected at the bottom and then horizontally flows into a second treatment pool (an upward vertical flow treatment pool) through a drain pipe, flows upwards through the packing layer in the pool, enters a third treatment pool (a downward vertical flow treatment pool) through overflow, flows downwards and passes through the packing layer, is collected at the bottom through the drain pipe and then is discharged into a river channel.
The cascade multi-section undercurrent has a unique multi-flow-direction composite water flow mode, so that the wetland can form a multifunctional area with good oxygen (a water storage layer at the upper part of the packing layer), poor oxygen (a medium soil layer at the middle part of the packing layer) and anaerobic (a broken stone cushion layer at the bottom of the packing layer) along the way, and the removal effect of nitrogen and phosphorus can be greatly improved under the combined action of various microorganisms.
The utility model has the advantages of even water supply, difficult short circuit of water flow and good reoxygenation condition, and can effectively remove suspended matters and organic pollutants in sewage. Meanwhile, the root system of the aquatic plant has stable nitrogen and phosphorus removal effect.
Compared with the traditional single wetland, the stepped multi-section subsurface flow constructed wetland treatment tank has the advantages of low cost, simple maintenance and operation, environmental sanitation, good effluent quality and the like, and is suitable for treating sewage such as industrial pollution, landscape water bodies, water sources for drinking, storm runoff and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (7)
1. The stepped multi-section subsurface flow constructed wetland treatment tank is characterized by comprising a plurality of alternately distributed descending vertical flow treatment tanks and ascending vertical flow treatment tanks, and a stepped water level difference is formed by the descending vertical flow treatment tanks and the ascending vertical flow treatment tanks; the downward vertical flow treatment tank and the upward vertical flow treatment tank are internally provided with packing layers, the bottom of each packing layer is provided with a drain pipe, and an ecological planting layer is arranged above each packing layer; the water discharge pipe between the downstream adjacent upstream vertical flow treatment tank and the water discharge pipe between the downstream adjacent downstream vertical flow treatment tank are not communicated.
2. The stepped multi-stage subsurface flow constructed wetland treatment tank of claim 1, wherein the descending vertical flow treatment tank and the ascending vertical flow treatment tank are separated by stepped dividing walls of different heights.
3. The stepped multi-segment subsurface flow constructed wetland treatment tank as claimed in claim 2, wherein drainage pipe holes are reserved at the bottom of the stepped dividing wall between the downstream vertical flow treatment tank and the bottom of the downstream adjacent upstream vertical flow treatment tank.
4. The stepped multi-section subsurface flow constructed wetland treatment tank of claim 1, wherein the packing layer comprises a water storage layer, a medium soil layer, a non-woven fabric layer, a gravel cushion layer, a composite geomembrane layer, a gray soil layer and a plain soil layer from top to bottom in sequence.
5. The stepped multi-segment subsurface flow constructed wetland treatment tank of claim 4, wherein the gravel cushion layer is provided with a plurality of layers, the thickness of the gravel cushion layer increases from bottom to top in sequence, and the particle size of the gravel also increases from bottom to top in sequence.
6. The stepped multi-stage subsurface flow constructed wetland treatment tank of claim 1, wherein the wall surfaces of the downward vertical flow treatment tank and the upward vertical flow treatment tank are also provided with composite geomembrane layers.
7. The stepped multi-segment subsurface flow constructed wetland treatment tank of claim 1, wherein the drain pipe is a PVC pipe, and a plurality of round holes are arranged on the drain pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921218835.9U CN210559648U (en) | 2019-07-31 | 2019-07-31 | Step multi-section undercurrent artificial wet land treating pool |
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| CN201921218835.9U CN210559648U (en) | 2019-07-31 | 2019-07-31 | Step multi-section undercurrent artificial wet land treating pool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357267A (en) * | 2019-07-31 | 2019-10-22 | 江苏山水环境建设集团股份有限公司 | Step multistage drowned flow artificial wet land processing pond and its construction method |
| CN112811733A (en) * | 2021-01-08 | 2021-05-18 | 罗洪湖 | Livestock breeding sewage treatment device and method |
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2019
- 2019-07-31 CN CN201921218835.9U patent/CN210559648U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357267A (en) * | 2019-07-31 | 2019-10-22 | 江苏山水环境建设集团股份有限公司 | Step multistage drowned flow artificial wet land processing pond and its construction method |
| CN112811733A (en) * | 2021-01-08 | 2021-05-18 | 罗洪湖 | Livestock breeding sewage treatment device and method |
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