CN216584623U - Vertical alternating vertical flow multifunctional coupling type artificial wetland - Google Patents
Vertical alternating vertical flow multifunctional coupling type artificial wetland Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model discloses a vertical alternating vertical flow multifunctional coupling type constructed wetland which comprises a wetland main bed body, wherein three baffle plates are fixedly arranged in the wetland main bed body, the wetland main bed body is sequentially divided into a first-stage descending treatment unit, a second-stage surface-submergence combined ascending treatment unit, a third-stage descending treatment unit and a fourth-stage ascending treatment unit from left to right, and the first-stage descending treatment unit comprises a cobblestone layer I, a gravel layer, a cobblestone layer II and an emergent aquatic plant planting layer. When the device is used, the incoming water is naturally oxygenated by a gravity free flow operation mode, large-particle pollutants are filtered and precipitated by the first-stage graded gravel treatment unit, then the filtered and precipitated large-particle pollutants enter a second-stage surface potential combination mode through uniform water distribution, total nitrogen is adsorbed by the adsorption effect of zeolite of the second-stage treatment unit, and the aquatic plants which have the adsorption effect on the total nitrogen are planted on the upper layer to absorb the total nitrogen, so that the incoming water is oxygenated to a certain degree.
Description
Technical Field
The utility model relates to the application field of sewage ecological technology, in particular to a vertical alternating vertical flow multifunctional coupling type artificial wetland.
Background
With the continuous promotion of the pace of ecological civilization construction, the quality requirement of the ecological environment is gradually increased. For most urban rivers in the north, the water coming from the urban river water system is mainly water for cross-country and regeneration make-up water mainly from tail water of sewage treatment plants, the ubiquitous ecological base water flow is not enough, the surface runoff and overflow pollution are serious, the hydrodynamic force of the gentle river channel of the river channel is not enough, part of river reach is not communicated, algae can be bred due to the retention of the micro-polluted river channel, eutrophication is generated, and the river channel is black and odorous.
At present, the effluent of urban sewage treatment plants in China executes the first-class A standard of discharge Standard of pollutants for urban sewage treatment plants (GB189182002), and the content of organic matters and nitrogen and phosphorus in the effluent is thicker than the environmental standard V-class water of surface water and is also far thicker than the standard of eutrophication nitrogen and phosphorus of water bodies. The water discharged into the river by a sewage plant is in a micro-polluted state, and the water body of the river develops eutrophication in the past. Among many technologies, artificial wetlands are widely used due to their unique natural ecosystem and low operation costs.
The artificial wetland technology has outstanding advantages in treating the slightly polluted water body of the river channel, and has been widely used in the fields of domestic sewage and industrial wastewater treatment, river and lake treatment, ecological restoration and the like due to the advantages of convenient management, low consumption, high efficiency and the like. The artificial wetland system is an artificially constructed, controllable and engineered wetland system. The system is a complete ecological system, fully exerts the production potential of resources by forming good internal circulation, obtains the best benefits of sewage treatment and resource utilization, and realizes better economic and ecological benefits. The artificial wetland has low technical investment and operating cost, and also has the advantages of simple operation, good effluent quality, strong impact resistance, capability of improving and beautifying the ecological environment and the like, thereby having extremely wide application prospect.
However, the defects are very obvious in the actual operation process, and when the micro-polluted water body is treated, the subsurface wetland adopting the filler is easy to block; the treatment efficiency is further reduced due to the reduction of the temperature in winter, and particularly in northern areas, the problems of water body icing, plant withering, reduction of microbial activity and the like are encountered; in addition, through literature research, the average removal efficiency of the constructed wetland system on total nitrogen is less than 50%, and when the temperature in winter is reduced or the carbon-nitrogen ratio of inlet water is reduced, the nitrogen removal rate of the system is further reduced. Therefore, the technical personnel in the field provide a vertical alternating vertical flow multifunctional coupling type artificial wetland to solve the problems in the background art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a vertical alternating vertical flow multifunctional coupling type artificial wetland to solve the problems in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme:
a vertical alternating vertical flow multifunctional coupling type constructed wetland comprises a wetland main bed body, wherein three baffle plates are fixedly arranged in the wetland main bed body, the wetland main bed body is sequentially divided into a first-stage descending treatment unit, a second-stage surface submerging combined ascending treatment unit, a third-stage descending treatment unit and a fourth-stage ascending treatment unit from left to right, the first-stage descending treatment unit comprises a cobble layer I, a cobble layer II and an emergent aquatic plant planting layer, the bottom layer of the first-stage descending treatment unit is provided with the cobble layer I, the upper end of the cobble layer I is provided with the cobble layer II, the upper layer of the cobble layer II is provided with an emergent aquatic plant planting layer, the emergent aquatic plant planting layer is planted with emergent aquatic plants with strong root system oxygen secretion capacity and nitrogen and phosphorus absorption capacity, the bottom layer of the second-stage surface submerging combined ascending treatment unit is a biological zeolite layer, and the upper layer of the biological zeolite layer is provided with a depression plant planting layer, submerged plants are planted in the euphorbia depression plant planting layers, the first breaker layer is arranged at the bottom layer of the third-level descending processing unit, the second breaker layer is arranged at the bottom layer of the fourth-level ascending processing unit, the green vegetation layer is arranged on the first breaker layer and the second breaker layer, the water distribution perforated pipe is fixedly installed on the upper layer of the wetland main bed body, and the water collection perforated pipe is fixedly installed on the lower layer of the wetland main bed body.
As a further scheme of the utility model: the thickness of the first cobble layer is 25cm, the first cobble layer is filled with 100mm cobbles, the thickness of the gravel layer is 30cm, the gravel layer is filled with 20-30mm medium-particle-size cobbles, the thickness of the second cobble layer is 25cm, and the second cobble layer is filled with 50-70mm cobbles.
As a still further scheme of the utility model: the thickness of the biological zeolite layer is 40cm, zeolite with large specific surface area is filled in the biological zeolite layer, the zeolite is in a frame structure, a large number of cavities and channels which are communicated with each other and are connected with the outside are arranged in the zeolite, a silicon-oxygen tetrahedron is used as a basic structural unit in the zeolite, and the silicon-oxygen tetrahedron forms unit rings, double-membered rings and multi-element ring cages step by step to form a main three-dimensional space frame-shaped crystal polyhedron.
As a still further scheme of the utility model: the thickness of the first gravel layer is 80cm, 20-30mm medium-particle-size gravel is filled in the first gravel layer, the thickness of the second gravel layer is 80cm, and 20-30mm medium-particle-size gravel is filled in the second gravel layer.
As a still further scheme of the utility model: and a green vegetation layer, an emergent aquatic plant planting layer and a euphorbia benthamiana plant planting layer are arranged on the upper layers of the first gravel layer and the second gravel layer to form an aquatic vegetation layer.
As a still further scheme of the utility model: the water distribution perforated pipe is a galvanized steel pipe with the pipe diameter of DN25, the center of the pipe is positioned 0.10m above the surface of the gravel packing, the water collection perforated pipe is a galvanized steel pipe with the pipe diameter of DN25, and the center of the pipe is positioned 0.10m above the bottom surface of the bed.
Compared with the prior art, the utility model has the beneficial effects that:
1. when the artificial wetland sewage treatment device is used, the artificial wetland is rectified and partitioned by the arrangement of the vertical partition plates, vertical flow is formed in the units through the top and bottom water collecting and distributing devices, water collecting and distributing are alternately arranged between the units on the top layer and the bottom layer of the adjacent units, and a multi-section aerobic/anaerobic alternate environment is created for the device by water distribution of the perforated pipes and a natural drop water reoxygenation mode, so that the denitrification effect of the whole device is enhanced.
2. When the device is used, the incoming water is naturally oxygenated by a gravity free flow operation mode, large-particle pollutants are filtered and precipitated by the first-stage graded gravel treatment unit, then the filtered and precipitated large-particle pollutants enter a second-stage surface potential combination mode through uniform water distribution, total nitrogen is adsorbed by the adsorption effect of zeolite of the second-stage treatment unit, and the aquatic plants which have the adsorption effect on the total nitrogen are planted on the upper layer to absorb the total nitrogen, so that the incoming water is oxygenated to a certain degree.
Drawings
Fig. 1 is a schematic structural diagram of a vertically-alternating vertical-current multifunctional coupled artificial wetland.
Fig. 2 is a schematic structural diagram of a water distribution perforated pipe in a vertical alternating vertical flow multifunctional coupling type artificial wetland.
Fig. 3 is a schematic structural diagram of a water collecting perforated pipe in a vertical alternating vertical flow multifunctional coupling type constructed wetland.
Fig. 4 is a cross-sectional view of fig. 2A-a in a vertically alternating vertical flow multifunctional coupled constructed wetland.
Fig. 5 is a cross-sectional view of fig. 2B-B in a vertically alternating vertical current multifunctional coupled constructed wetland.
Fig. 6 is a diagram of the effect of removing COD in effluent after stable operation of the system in the embodiment of the vertical alternating vertical flow multifunctional coupled artificial wetland.
Fig. 7 is a diagram of the effect of removing the effluent TN after the system stably operates in the embodiment of the vertical alternating vertical flow multifunctional coupled artificial wetland.
In the figure: 1. a main bed body in a wet area; 2. a first-level downlink processing unit; 21. a cobble layer I; 22. a gravel layer; 23. a cobble layer II; 24. emerging plant planting layer; 3. a secondary meter latent combination uplink processing unit; 31. a layer of biological zeolite; 32. A planting layer of the euphorbia humifusa plant; 4. a third-level downlink processing unit; 41. a crushed stone layer I; 5. a four-level uplink processing unit; 51. a second crushed stone layer; 6. an aquatic vegetation layer; 7. a water distribution perforated pipe; 8. a water collecting perforated pipe; 9. a baffle plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, in the embodiment of the utility model, a vertical alternating vertical flow multifunctional coupling type artificial wetland comprises a wetland main bed body 1, wherein three baffle plates 9 are fixedly installed in the wetland main bed body 1, the wetland main bed body 1 is sequentially divided into a first-stage descending treatment unit 2, a second-stage surface diving combined ascending treatment unit 3, a third-stage descending treatment unit 4 and a fourth-stage ascending treatment unit 5 from left to right, the first-stage descending treatment unit 2 comprises a first cobble layer 21, a gravel layer 22, a second cobble layer 23 and an emergent aquatic plant planting layer 24, the first cobble layer 21 is arranged at the bottom layer of the first-stage descending treatment unit 2, the first cobble layer 21 is 25cm thick, the first cobble layer 21 is filled with 100mm cobbles, the upper end of the first cobble layer 21 is provided with the gravel layer 22, the thickness of the gravel layer 22 is 30cm, the inner part of the gravel layer 22 is filled with 20-30mm diameter gravels, the upper end of the gravel layer 22 is provided with the second cobble layer 23, the thickness of the cobble layer II 23 is 25cm, the cobble layer II 23 is filled with 50-70mm cobbles, an emergent aquatic plant planting layer 24 is arranged on the upper layer of the cobble layer II 23, emergent aquatic plants with strong root system oxygen secretion capability and nitrogen and phosphorus absorption capability are planted on the emergent aquatic plant planting layer 24, the bottom layer of the secondary surface potential combination ascending processing unit 3 is filled with a biological zeolite layer 31, the thickness of the biological zeolite layer 31 is 40cm, the biological zeolite layer 31 is filled with zeolite with large specific surface area, the zeolite is in a frame structure, a large number of cavities and channels which are communicated with each other and are connected with the outside are arranged in the zeolite, the interior of the zeolite takes a silicon-oxygen tetrahedron as a basic structural unit, the silicon-oxygen tetrahedron forms a unit ring, a double-member ring and a multi-member ring cage step by step to form a main three-dimensional space frame-shaped crystal polyhedron, the euphorbia planting layer 32 is arranged on the upper layer of the biological zeolite layer 31, and submerged plants are planted in the euphorbia planting layer 32, the bottom layer of the third-level descending processing unit 4 is provided with a first crushed stone layer 41, the thickness of the first crushed stone layer 41 is 80cm, the inside of the first crushed stone layer 41 is filled with crushed stones with the particle size of 20-30mm, the bottom layer of the fourth-level ascending processing unit 5 is provided with a second crushed stone layer 51, the thickness of the second crushed stone layer 51 is 80cm, the inside of the second crushed stone layer 51 is filled with crushed stones with the particle size of 20-30mm, green vegetable layers are arranged on the upper layers of the first crushed stone layer 41 and the second crushed stone layer 51, green vegetable layers, emergent aquatic plant planting layers 24 and frustrated plant planting layers 32 are arranged on the upper layers of the first crushed stone layer 41 and the second crushed stone layer 51 to form an aquatic vegetable layer 6, a water distribution perforated pipe 7 is fixedly arranged on the upper layer of the wetland main bed body 1, the pipe 7 is a galvanized steel pipe with the pipe diameter of DN25, the center of the pipe is located 0.10m above the surface of the crushed stone filling, a water collection perforated pipe 8 is fixedly arranged on the lower layer of the wetland main bed body 1, and the water collection perforated pipe 8 is a galvanized steel pipe with the DN25, the center of the tube is located 0.10m above the bottom surface of the bed.
The following embodiments are adopted to verify the practical effect of the utility model:
the first embodiment is as follows:
the embodiment applies the multistage coupling uplink and downlink vertical flow constructed wetland to the bypass repair of the polluted river channel. Constructing an artificial wetland treatment device according to the size of the figure. The depth of the wetland is 1 meter, 2 groups of the wetland operate in parallel, the No. 1 wetland adopts a multistage coupling up-down vertical flow constructed wetland, the filler configuration of the No. 2 wetland is the same as that of the No. 1 wetland, and the flow state is in a plug flow state. Two groups of wetlands are the same in the plant arrangement of the wetlands, and aquatic plants with better purification function are selected. The selection of the subsurface flow wetland part is as follows: the thick subsurface flow wetland purification efficiency is improved by using reed, calamus, allium mongolicum regel, wild rice stem and other plants, and part of ornamental plants such as lotus, arrowhead, loosestrife and the like; the device selects 5 kinds of aquatic wetland plants in total, and the growth characteristics and the functions of the aquatic wetland plants are shown in the following table
COD load 10g/m2D (specification recommends 8-12 g/m)2D) ammonia nitrogen load 0.6g/m2D. Hydraulic load: 0.40m3/ m2·d。
After the system operates stably, the COD concentration of the inlet water is 36.21 +/-0.91 mg/L, and the figure shows that the COD of the No. 1 outlet water quality is 20.18 +/-0.63 mg/L, the removal rate is stabilized at about 44.24 +/-1.83%, the COD of the No. 2 outlet water quality is 15.17 +/-0.98 mg/L, and the removal rate is stabilized at about 58.06 +/-3.02%.
After the system operates stably, the concentration of the inlet water TN is 3.39 +/-0.23 mg/L, and the figure shows that the quality TN of the 1# outlet water is 2.19 +/-0.07 mg/L, the removal rate is stabilized at about 34.95 +/-4.65%, the quality TN of the 2# outlet water is 1.51 +/-0.09 mg/L, and the removal rate is stabilized at about 55.01 +/-4.46%.
The test results show that the multi-stage coupling up-down vertical flow artificial wetland is utilized in the embodiment, the removal effect of the artificial wetland is greatly improved compared with that of the traditional artificial wetland, the removal capability of pollutants is enhanced, the diversity and the total amount of microorganisms in the system are increased, the operation effect of the system is more stable, and the removal effect of the pollutants is greatly improved.
The working principle of the utility model is as follows:
when the device is used, raw water firstly passes through the first-stage descending treatment unit 2, is naturally subjected to water drop and oxygenation through the upper water distribution perforated pipe 7, can fully ensure the uniformity of water distribution through the cobble layer I21, is primarily filtered through the middle cobble layer 22, is collected through the cobble layer II 23, large-particle suspended matters are deposited at the bottom, clear water enters the second-stage surface submergence combined ascending treatment unit 3 from bottom to top through the water collection perforated pipe 8, the biological zeolite layer 31 is arranged in the second-stage surface submergence combined ascending treatment unit 3, the zeolite of the biological zeolite layer 31 has a large specific surface area, and a large electrostatic attraction is formed by a special molecular structure, when the clear water passes through the biological zeolite layer 31, pollutants such as nitrogen, phosphorus and the like in the water can be greatly adsorbed by the zeolite and then are degraded by microorganisms attached to the surface of the zeolite, so that the water quality is purified; the euphorbia depression plant planting layer 32 is arranged on the upper layer of the biological zeolite layer 31, on one hand, the plants have a good absorption effect on total nitrogen, on the other hand, aquatic plants absorb pollutants in incoming water through growth and can also oxygenate the incoming water through photosynthesis, water discharged from the secondary surface latent combination uplink processing unit 3 enters the tertiary downlink processing unit 4 through the upper water collection perforated pipe 8, naturally drops water and is oxygenated through the water distribution perforated pipe 7 and enters the first gravel layer 41, the pollutants in the water are further removed through the first gravel layer 41 and the degradation effect of microorganisms on the gravel, then the pollutants in the water enter the quaternary uplink processing unit 5 through the same water collection and distribution device, are filtered through the second gravel layer 51 and are degraded again through the microorganisms on the gravel, and finally overflow enters the clean water tank.
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 person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (6)
1. A vertical alternating vertical flow multifunctional coupling type constructed wetland comprises a main wetland bed body (1) and is characterized in that three baffle plates (9) are fixedly installed in the main wetland bed body (1), the main wetland bed body (1) is sequentially divided into a first-stage descending processing unit (2), a second-stage surface diving combination ascending processing unit (3), a third-stage descending processing unit (4) and a fourth-stage ascending processing unit (5) from left to right, the first-stage descending processing unit (2) comprises a first cobble layer (21), a gravel layer (22), a second cobble layer (23) and an emergent aquatic plant planting layer (24), the first cobble layer (21) is arranged at the bottom layer of the first-stage descending processing unit (2), the gravel layer (22) is arranged at the upper end of the first cobble layer (21), the second cobble layer (23) is arranged at the upper end of the gravel layer (22), the emergent aquatic plant planting layer (24) is arranged at the upper layer of the second cobble layer (23), emergent aquatic plant that layer (24) were planted and have root system oxygen secretion ability and nitrogen phosphorus absorptive capacity stronger emergent aquatic plant, the combination of second grade table latent combination goes up processing unit (3) underfill and is biological zeolite layer (31), layer (32) are planted to biological zeolite layer (31) upper strata arrangement euphorbia depression grass plant, plant benthophyte in layer (32) is planted to euphorbia depression grass plant, tertiary processing unit (4) bottom down is equipped with metalling one (41), the level four goes upward processing unit (5) bottom and is equipped with metalling two (51), and metalling one (41) and metalling two (51) upper strata arrangement green vegetable layer, wetland owner bed body (1) upper strata fixed mounting water distribution perforated pipe (7), wetland owner bed body (1) lower floor fixed mounting water collection perforated pipe.
2. The vertically-alternated vertical-flow multifunctional coupled constructed wetland according to claim 1, wherein the thickness of the first cobble layer (21) is 25cm, the first cobble layer (21) is filled with 100mm cobbles, the thickness of the gravel layer (22) is 30cm, the gravel layer (22) is filled with 20-30mm medium-particle-size gravel, the thickness of the second cobble layer (23) is 25cm, and the second cobble layer (23) is filled with 50-70mm cobbles.
3. The vertically-alternated vertical-flow multifunctional coupled artificial wetland according to claim 1, wherein the thickness of the biological zeolite layer (31) is 40cm, the biological zeolite layer (31) is filled with zeolite with large specific surface area, the zeolite is in a frame structure, the interior of the zeolite is provided with a large number of cavities and channels which are communicated with each other and are connected with the outside, the interior of the zeolite is provided with silica tetrahedrons as basic structural units, and the silica tetrahedrons are formed into a main three-dimensional space frame-shaped crystal polyhedron by gradually forming unit rings, double-membered rings and multi-element ring cages.
4. The vertically-alternated vertical-flow multifunctional coupled constructed wetland according to claim 1, characterized in that the thickness of the first gravel layer (41) is 80cm, the inner part of the first gravel layer (41) is filled with 20-30mm medium-particle-size gravel, the thickness of the second gravel layer (51) is 80cm, and the inner part of the second gravel layer (51) is filled with 20-30mm medium-particle-size gravel.
5. The vertically-alternating vertical-flow multifunctional coupled constructed wetland in accordance with claim 1, wherein a green vegetation layer, an emergent aquatic plant growing layer (24) and a depression plant growing layer (32) are arranged on the first crushed stone layer (41) and the second crushed stone layer (51) to form an aquatic vegetation layer (6).
6. The vertically-alternated vertical-flow multifunctional coupled artificial wetland as claimed in claim 1, wherein the water distribution perforated pipe (7) is a galvanized steel pipe with the pipe diameter DN25, the center of the pipe is located 0.10m above the surface of the gravel packing, the water collection perforated pipe (8) is a galvanized steel pipe with the pipe diameter DN25, and the center of the pipe is located 0.10m above the bottom surface of the bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120217776.4U CN216584623U (en) | 2021-01-26 | 2021-01-26 | Vertical alternating vertical flow multifunctional coupling type artificial wetland |
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| CN202120217776.4U CN216584623U (en) | 2021-01-26 | 2021-01-26 | Vertical alternating vertical flow multifunctional coupling type artificial wetland |
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2021
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