CN219058705U - Jet aeration composite constructed wetland device - Google Patents
Jet aeration composite constructed wetland device Download PDFInfo
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- CN219058705U CN219058705U CN202222449456.9U CN202222449456U CN219058705U CN 219058705 U CN219058705 U CN 219058705U CN 202222449456 U CN202222449456 U CN 202222449456U CN 219058705 U CN219058705 U CN 219058705U
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a jet aeration composite constructed wetland device which comprises a primary wetland and a secondary wetland, wherein fillers are arranged in the primary wetland and the secondary wetland, a first water distribution channel is arranged on one side of the primary wetland, a second water distribution channel is arranged between the other side of the primary wetland and the secondary wetland, a supplementary water inlet mechanism is arranged in the primary wetland, a jet aeration mechanism is arranged on the side of the primary wetland, a water inlet main pipe is respectively connected with the supplementary water inlet mechanism, the jet aeration mechanism and the first water distribution channel, a water falling opening is arranged on one side, close to the primary wetland, of the first water distribution channel, the bottom of the primary wetland is communicated with the second water distribution channel, the bottom of the second water distribution channel is communicated with the bottom of one side of the secondary wetland, a water collecting channel is arranged on the other side of the secondary wetland, and a second water outlet pipe is arranged at the bottom of the water collecting channel. The primary wetland comprises three modes of drop port aeration water inflow, jet aeration water inflow and anoxic zone supplement water inflow, the water inflow of each mechanism is controlled through a valve and a flowmeter, and reoxygenation of the aerobic zone can not be influenced by the growth condition of plants.
Description
Technical Field
The utility model relates to a jet aeration composite constructed wetland device.
Background
Water plays a vital role as a source of life and a root of production and life. Due to factors such as difficult transformation of old urban areas, inadequacy of urban environment infrastructure construction and the like, some sewage is directly discharged into water body without treatment, and garbage enters the river, so that the river bottom mud is seriously polluted, the water quality of the water body is gradually deteriorated, and the black and odorous phenomenon of the water body frequently occurs. Therefore, development of an economical, efficient and convenient sewage ecological treatment technology is needed for advanced treatment of tail water of urban sewage treatment plants, rural domestic sewage treatment, black and odorous water body treatment and ecological restoration.
The artificial wetland is used as a sewage ecological treatment engineering technology, utilizes the comprehensive evolution capability of a filler-microorganism-plant ecological system on pollutants, and has more advantages in sewage advanced treatment, such as low investment, maintenance and operation cost, gradual management, good treatment effect, small secondary pollution, strong impact load resistance and the like. The main typical types of the constructed wetland comprise three types of surface flow constructed wetland, horizontal subsurface flow constructed wetland and vertical flow constructed wetland, and a combined constructed wetland treatment system consisting of a plurality of constructed wetland tanks of the same type or different types is also provided for improving the purification effect of the constructed wetland on wastewater. However, the existing constructed wetland practical engineering application has obvious defects and problems that the treatment efficiency is greatly influenced by the climate temperature conditions, and the phenomena of sedimentation, saturation and the like are easy to generate.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the jet aeration composite constructed wetland device with simple structure and low cost.
The technical scheme for solving the technical problems is as follows: the jet aeration composite constructed wetland device comprises a primary wetland and a secondary wetland, wherein the primary wetland and the secondary wetland are internally provided with fillers which are gravel, lime and crushed stone from top to bottom respectively to form an aerobic zone, an anoxic zone and an anaerobic zone respectively; the first water distribution channel is arranged on one side of the first-stage wetland, the second water distribution channel is arranged between the other side of the first-stage wetland and the second-stage wetland, a supplementary water inlet mechanism is arranged at the anoxic zone position of the first-stage wetland, two jet aeration mechanisms are symmetrically arranged on the side edge of the first-stage wetland, a water inlet main pipe is respectively connected with the supplementary water inlet mechanism, the jet aeration mechanisms and the first water distribution channel, a water falling opening is arranged on one side, close to the first-stage wetland, of the first water distribution channel, and is positioned right above the first-stage wetland, the bottom of the other side of the first-stage wetland is communicated with the second water distribution channel through a first water outlet pipe, the bottom of the second water distribution channel is communicated with the bottom of one side of the second-stage wetland through a second water inlet pipe, a water collecting channel is arranged on the other side of the second-stage wetland, and a second water outlet pipe is arranged at the bottom of the water collecting channel.
Above-mentioned jet aeration composite constructed wetland device, jet aeration mechanism includes control valve, first flowmeter, jet water inlet pipe and a plurality of jet aerator are constituteed, and water inlet header pipe is all connected to jet water inlet pipe's one end, and jet water inlet pipe other end divide into a plurality of water inlet branch pipelines, and the end of every water inlet branch pipeline all sets up a jet aerator, all sets up a control valve and a first flowmeter on every water inlet branch pipeline.
Above-mentioned jet aeration composite constructed wetland device, supplementary water inlet mechanism includes supplementary inlet control valve, second flowmeter, supplementary inlet channel, supplementary inlet opening, and the intake manifold is all connected to the one end of supplementary inlet channel, and the jet inlet channel other end divide into a plurality of supplementary inlet branch pipes, and the end of every supplementary inlet branch pipe all communicates the one-level wetland through supplementary inlet opening, all sets up a supplementary inlet control valve and second flowmeter on every supplementary inlet branch pipe.
The front end of the water inlet main pipe is provided with the pretreatment unit, and the pretreatment unit comprises a grid, a water collecting well and a lifting submersible pump, wherein the grid, the water collecting well, the lifting submersible pump and the water inlet main pipe are connected in sequence.
The jet aeration composite constructed wetland device is characterized in that the primary wetland is a downstream pool, and the sewage flow direction is vertical downward flow; the second-stage wetland is an upward flow pool, and the sewage flow direction is vertical upward flow.
According to the jet aeration composite constructed wetland device, the particle size d=5-10 mm of the gravel and the thickness range of the gravel are 0-900 mm; the particle diameter d=16-25 mm of the limestone, and the thickness range is 900-1200 mm; the crushed stone has a particle diameter d=20 to 30mm and a thickness ranging from 1200mm to 1500mm.
According to the jet aeration composite constructed wetland device, the ratio of the total amount of aeration water entering from the water falling opening of the first water distribution channel to the total amount of aeration water entering from the jet aeration mechanism to the water quantity of supplementary water entering from the supplementary water entering mechanism is 2:1.
the jet aeration composite constructed wetland device is characterized in that different plant combinations are selected from gravels of the primary wetland and the secondary wetland for planting, the primary wetland adopts reed-canna combination, and the secondary wetland adopts typha-calamus combination.
The utility model has the beneficial effects that:
1. the primary wetland comprises three modes of drop port aeration water inlet, jet aeration water inlet and anoxic zone supplementing water inlet. The water inlet main pipe, the supplementary water inlet mechanism, the jet aeration mechanism and the first water distribution channel control the water inflow of each mechanism through a valve and a flowmeter, and reoxygenation of the aerobic zone can not be influenced by the growth condition of plants.
2. Compared with the traditional aeration system, the jet water inlet pipeline of the jet aeration mechanism adopts a venturi tube, and utilizes the venturi effect to suck a large amount of air to perform jet aeration to replace the traditional aeration mode, and has the advantages of no need of a fan, low cost and simple operation and maintenance.
3. The primary wetland is a downward flow pool, and the sewage flow direction is vertical downward flow; the second-stage wetland is an upward flow pool, and the sewage flow direction is vertical upward flow. According to the hydraulic flow direction characteristics and the filler depth distribution characteristics of the wetland, the process of aerobic zone, anoxic zone, anaerobic zone, anoxic zone and aerobic zone, namely the OAAAO process, is formed, and is beneficial to organic matter degradation and biological denitrification and dephosphorization. The anoxic zone is supplemented with water, which can supplement organic matters needed in the denitrification process and strengthen biological denitrification.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a top plan view of the present utility model.
FIG. 3 is a schematic structural view of the jet aeration mechanism of the present utility model.
Fig. 4 is a schematic structural view of the water replenishing mechanism of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2, the jet aeration composite constructed wetland device comprises a primary wetland and a secondary wetland, wherein the primary wetland and the secondary wetland are internally provided with fillers, and the fillers are respectively gravel 7, lime 8 and crushed stone 9 from top to bottom so as to respectively form an aerobic zone, an anoxic zone and an anaerobic zone; the first water distribution channel 2 is arranged on one side of the first-stage wetland, the second water distribution channel 11 is arranged between the other side of the first-stage wetland and the second-stage wetland, the supplemental water inlet mechanism 4 is arranged at the anoxic zone position of the first-stage wetland, the two jet aeration mechanisms 5 are symmetrically arranged on the side edge of the first-stage wetland, the water inlet main pipe 1 is respectively connected with the supplemental water inlet mechanism 4, the jet aeration mechanisms 5 and the first water distribution channel 2, the water falling port 3 is arranged on one side of the first water distribution channel 2 close to the first-stage wetland, the water falling port 3 is positioned right above the first-stage wetland, the bottom of the other side of the first-stage wetland is communicated with the bottom of one side of the second-stage wetland through the first water outlet pipe 10, the bottom of the second water distribution channel 11 is communicated with the bottom of the second-stage wetland through the second water inlet pipe 12, the other side of the second-stage wetland is provided with the water collecting channel 13, and the bottom of the water collecting channel 13 is provided with the second water outlet pipe 14.
The water depth of the primary wetland is 30cm, the primary wetland is a downstream pool, and the sewage flow direction is vertical downward flow; the water depth of the secondary wetland is 10cm, the secondary wetland is an upward flow pool, and the sewage flow direction is vertical upward flow. According to the characteristics of wetland hydraulic flow direction and filler depth distribution, the process of aerobic zone, anoxic zone, anaerobic zone, anoxic zone and aerobic zone, namely the OAAAO process, is formed, is suitable for rural domestic sewage septic tank effluent, the treated effluent can reach the first-level standard of rural domestic sewage treatment technical standard, and the COD removal rate of sewage reaches 80% -90%, the ammonia nitrogen removal rate of 60% -70% and the total phosphorus of 80% -90%, respectively.
The particle size d=5-10 mm of the gravel 7, and the thickness range is 0-900 mm; lime 8 stone particle diameter d=16-25 mm, and thickness range is 900-1200 mm; the diameter d=20 to 30mm of the crushed stone 9, and the thickness range is 1200mm to 1500mm.
The ratio of the total amount of aeration water inflow of the water drop port 3 of the first water distribution channel 2 to the total amount of jet aeration water inflow of the jet aeration mechanism 5 to the water inflow amount of supplementary water inflow of the supplementary water inflow mechanism 4 is 2:1. wherein the water inlet of the water drop port 3 of the first water distribution channel 2 is aerated, and the jet aeration water inlet of the jet aeration mechanism 5 is adjusted according to seasons, plant growth conditions, the content of dissolved oxygen and the concentration load of sewage pollutants so as to control the dissolved oxygen of the aerobic zone to be 2.0-3.0 mg/L.
As shown in fig. 3, the jet aeration mechanism 5 includes a control valve 15, a first flowmeter 16, a jet water inlet pipe 17 and a plurality of jet aerators 18, one end of the jet water inlet pipe 17 is connected to the water inlet main pipe 1, the other end of the jet water inlet pipe 17 is divided into a plurality of water inlet branch pipes, the tail end of each water inlet branch pipe is provided with a jet aerator 18, and each water inlet branch pipe is provided with a control valve 15 and a first flowmeter 16. The jet water inlet pipeline 17 adopts a venturi tube, and a large amount of air is sucked by utilizing the venturi effect to perform jet aeration to replace the traditional aeration mode.
As shown in fig. 4, the supplementary water inlet mechanism 4 includes a supplementary water inlet control valve 19, a second flowmeter 20, a supplementary water inlet pipe 21, and a supplementary water inlet hole 22, one end of the supplementary water inlet pipe 21 is connected to the water inlet main pipe 1, the other end of the jet water inlet pipe 21 is divided into a plurality of supplementary water inlet branch pipes, the tail end of each supplementary water inlet branch pipe is communicated with the first-stage wetland through the supplementary water inlet hole 22, and each supplementary water inlet branch pipe is provided with a supplementary water inlet control valve 19 and the second flowmeter 20. The depth of the water supplementing mechanism 4 is used for supplementing organic matters required by the denitrification process and strengthening biological denitrification.
The front end of the water inlet header pipe 1 is provided with a pretreatment unit, and the pretreatment unit comprises a grid, a water collecting well and a lifting submersible pump, wherein the grid, the water collecting well, the lifting submersible pump and the water inlet header pipe 1 are connected in sequence.
The gravels 7 of the first-stage wetland and the second-stage wetland are planted by combining different plants 6, the first-stage wetland adopts reed-canna combination, and the second-stage wetland adopts typha-calamus combination.
With the increase of the system running time, the blocking phenomenon of the wetland system can occur under the actions of the trapped solids, microbial films, the growth of biological root systems and the like. In rural areas with large areas, a first-class water collecting channel 15 and an emptying pipe 16 are arranged in the secondary wetland device, so that the system of the wetland is recovered by stopping the machine and rotating when the wetland fails.
The sewage treatment flow in this embodiment is: collecting effluent from a rural domestic sewage septic tank, entering a grid and a collector well, lifting the effluent by a lifting pump, entering a first water distribution channel 2 through a water inlet main pipe 1, performing drop aeration water inlet or jet aeration water inlet, and carrying out aerobic decomposition and digestion reaction of organic matters on sewage in an aerobic zone through drop aeration and jet aeration and oxygen transmission by a plant root system; then the organic matters enter an anoxic and anaerobic section for further decomposition and denitrification, the concentration of initial organic matters in the anoxic and anaerobic section is increased in a mode of supplementing water in the anoxic zone, the anoxic and anaerobic decomposition effects are enhanced, and various pollutants in sewage are removed in a mode of filtration interception, adsorption and biodegradation, plant absorption and the like through an aerobic-anoxic-anaerobic-aerobic process.
The sewage source of the embodiment is domestic sewage, the treated water quantity is 50m3/d, the COD of the inflow water quality is 142mg/L, the ammonia nitrogen is 22mg/L, the total phosphorus is 3.1mg/L, the COD, the ammonia nitrogen and the total phosphorus of the outflow water quality are respectively reduced to 27.67mg/L, 7.2mg/L and 0.18mg/L after the treatment of the process of the embodiment, and the removal rates respectively reach 80.51%, 67.27% and 95.48%.
Claims (6)
1. The jet aeration composite constructed wetland device is characterized in that: the device comprises a primary wetland and a secondary wetland, wherein the primary wetland and the secondary wetland are internally provided with fillers to form an aerobic zone, an anoxic zone and an anaerobic zone respectively; the first water distribution channel is arranged on one side of the first-stage wetland, the second water distribution channel is arranged between the other side of the first-stage wetland and the second-stage wetland, a supplementary water inlet mechanism is arranged at the anoxic zone position of the first-stage wetland, two jet aeration mechanisms are symmetrically arranged on the side edge of the first-stage wetland, a water inlet main pipe is respectively connected with the supplementary water inlet mechanism, the jet aeration mechanisms and the first water distribution channel, a water falling opening is arranged on one side, close to the first-stage wetland, of the first water distribution channel, and is positioned right above the first-stage wetland, the bottom of the other side of the first-stage wetland is communicated with the second water distribution channel through a first water outlet pipe, the bottom of the second water distribution channel is communicated with the bottom of one side of the second-stage wetland through a second water inlet pipe, a water collecting channel is arranged on the other side of the second-stage wetland, and a second water outlet pipe is arranged at the bottom of the water collecting channel.
2. The jet aeration composite constructed wetland device according to claim 1, wherein: the jet aeration mechanism comprises a control valve, a first flowmeter, a jet water inlet pipeline and a plurality of jet aerators, wherein one end of the jet water inlet pipeline is connected with a water inlet main pipe, the other end of the jet water inlet pipeline is divided into a plurality of water inlet branch pipelines, the tail end of each water inlet branch pipeline is provided with one jet aerator, and each water inlet branch pipeline is provided with one control valve and one first flowmeter.
3. The jet aeration composite constructed wetland device according to claim 1, wherein: the water supply mechanism comprises a water supply control valve, a second flowmeter, a water supply pipeline and water supply holes, one end of the water supply pipeline is connected with a water supply main pipe, the other end of the jet water supply pipeline is divided into a plurality of water supply branch pipes, the tail end of each water supply branch pipe is communicated with the first-stage wetland through the water supply hole, and each water supply branch pipe is provided with the water supply control valve and the second flowmeter.
4. The jet aeration composite constructed wetland device according to claim 1, wherein: the front end of the water inlet main pipe is provided with a pretreatment unit, and the pretreatment unit comprises a grid, a water collecting well and a lifting submersible pump which are connected in sequence.
5. The jet aeration composite constructed wetland device according to claim 1, wherein: the primary wetland is a downward flow pool, and the sewage flow direction is vertical downward flow; the second-stage wetland is an upward flow pool, and the sewage flow direction is vertical upward flow.
6. The jet aeration composite constructed wetland device according to claim 1, wherein: the ratio of the total amount of aeration water entering from the water falling opening of the first water distribution channel to the total amount of aeration water entering from the jet aeration mechanism to the water quantity of supplementary water entering from the supplementary water entering mechanism is 2:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222449456.9U CN219058705U (en) | 2022-09-16 | 2022-09-16 | Jet aeration composite constructed wetland device |
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| CN202222449456.9U CN219058705U (en) | 2022-09-16 | 2022-09-16 | Jet aeration composite constructed wetland device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120081509A (en) * | 2025-03-25 | 2025-06-03 | 中冶华天工程技术有限公司 | Embedded composite wetland system and method for enhanced removal of COD, NH3-N and TN |
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- 2022-09-16 CN CN202222449456.9U patent/CN219058705U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120081509A (en) * | 2025-03-25 | 2025-06-03 | 中冶华天工程技术有限公司 | Embedded composite wetland system and method for enhanced removal of COD, NH3-N and TN |
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