CN201128703Y - subsurface flow alternate constructed wetland - Google Patents

Abstract

The utility model relates to an artificial wetland with alternating submerged and surface flow, which comprises a wetland peripheral wall, a water inlet pool, a water outlet pool, a water inlet, a water outlet, an undercurrent area, a surface flow area, a partition wall and wetland plants, and the left and right ends of the wetland peripheral wall There are respectively an inlet pool and an outlet pool. There is an underflow area near the inlet and outlet pools. The middle partition wall is provided with an underflow area and a surface flow area. The underflow area and the surface flow area are separated by a partition wall. There are water inlets and water outlets on the top, and wetland plants are planted on the subsurface flow area and the surface flow area. During operation, sewage flows into the subsurface flow area from the water inlet to remove suspended matter and dissolved pollutants, and then flows through the surface flow area to remove organic matter, wetland plants absorb nutrients, heavy metals and toxic and harmful substances, and the purified sewage is discharged from the outlet pipe In and out of the pool. It has the advantages of good water discharge effect, little weather influence, low cost, convenient management, safety and environmental protection, etc.

Description

subsurface flow alternate constructed wetland

technical field

The utility model relates to a water quality purification equipment, in particular to a novel subsurface-surface flow alternate artificial wetland which utilizes the combination of subsurface flow and surface flow artificial wetland to treat and purify sewage.

Background technique

We know that constructed wetland technology has the advantages of less investment, simple management, and low cost, and has a good application prospect. Constructed wetlands can be divided into two types: surface flow and subsurface flow, both of which have advantages and disadvantages. The submerged flow bed has a good removal effect on pollution indicators such as organic matter, nitrogen, phosphorus and heavy metals, and there is little stench and breeding of mosquitoes and flies. However, due to the very limited oxygen supply capacity and complicated control, the water purification effect is reduced. ; The surface flow artificial wetland can carry out aerobic treatment of organic matter. The disadvantages are that it occupies a large area, low hydraulic load, limited decontamination capacity, and there are more suspended solids in the effluent, which is greatly affected by the climate. stink.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the utility model provides a subsurface-surface flow alternating artificial wetland with simple structure, small footprint, strong decontamination ability, no peculiar smell, and strong support ability.

The purpose of this utility model is achieved by adopting the following technical solutions: a submerged surface flow alternate artificial wetland, including wetland peripheral wall, water inlet pool, water outlet pool, water inlet, water outlet, subsurface flow area, surface flow area, partition wall and Wetland plants, the two ends of the outer wall of the wetland are respectively provided with an inlet pool and an outlet pool, and there is an underflow area near the inlet and outlet pools, and an underflow area and a surface flow area are set in the middle, and the underflow area and the surface flow area are separated by a partition wall Separately, water inlets and water outlets are respectively arranged on the subsurface flow areas at the left and right ends, and aquatic plants are respectively planted on the subsurface flow areas and the surface flow areas.

The subsurface flow area includes wetland plants, gravel layer and overburden layer from top to bottom.

The water inlet is located at the upper part of the gravel layer, and the water outlet is located at the lower middle of the gravel layer.

The covering soil layer of the subsurface flow zone and the entire surface flow area are composed of pastoral soil and peat.

The covering soil layer in the subsurface flow area is 10-15cm thick

Small holes are arranged on the partition wall.

The aquatic plants are one or more of wild rice plants, cattails, reeds, rushes, duckweeds, water lilies and water lilies.

When the utility model is in operation, the sewage flows into the underflow area from the water inlet through the water inlet pool, and the suspended matter in the water inlet is quickly removed through the sedimentation and filtration of the gravel layer, and the soluble pollutants mainly rely on the growth of microorganisms attached to the surface of the filler and the root system Remove, and then flow through the surface flow area, where the removal of organic matter mainly depends on the near-stationary sedimentation conditions on the water surface and the action of microorganisms attached to the surface stems. The wetland plants planted in the subsurface flow area and the surface flow area can directly absorb nutrients such as nitrogen and phosphorus, heavy metals and toxic and harmful substances in sewage, and transform them into plant components. Finally, the purified sewage is discharged into the effluent pool from the two outlets at the right end of the wetland.

The utility model has the following advantages:

1. It overcomes the shortcomings of subsurface flow constructed wetland and surface flow constructed wetland, and makes the two organically combined to achieve better water discharge effect;

2. It is less affected by weather conditions and can run continuously;

3. Less investment, simple equipment, convenient management, and low cost of sewage treatment;

4. The whole treatment process is safe and environmentally friendly, without secondary pollution.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the top view of Fig. 1;

1. Inlet pipe, 2. Gravel layer, 3. Surface flow area, 4. Outlet pipe, 5. Overburden layer, 6. Aquatic plants, 7. Subsurface flow area, 8. Partition wall, 9. Wetland peripheral wall, 10. Into the pool, 11. Out of the pool.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

In Fig. 1 and Fig. 2, the outer wall 9 of the constructed wetland can be made of concrete, and the water inlet pipe 1 and the water outlet pipe 4 can be embedded in it. The upper part, the outlet pipe mouth is located in the lower middle part of the gravel layer 2, the subsurface flow area 7 and the surface flow area 3 are connected and can be made of concrete, the upper partition wall 8 can be made of hollow bricks or PVC plastics with holes, and the covering soil layer of the subsurface flow area 7 5 and the entire surface flow area 3 are composed of pastoral soil and peat, on which wetland plants 6 such as wildflowers, cattails, reeds, rushes, duckweeds, water lilies, etc. can be planted. Wherein the covering soil layer 5 of subsurface flow area 7 is thick about 10-15cm

During the water purification treatment, the sewage is evenly distributed into the underflow area 7 by the two water inlet pipes 1 from the water inlet pool 10, the sewage seeps inside the gravel layer 2, and the suspended matter in the influent water is quickly removed through the sedimentation and filtration of the gravel layer 2, Dissolved pollutants are mainly removed by the growth of microorganisms attached to the surface of the filler and the root system. The sewage flows from the right end of the subsurface flow area 7 through the small hole in the partition wall 8 into the surface flow area 3. In the surface flow area, the pollutants mainly pass through the bed. The comprehensive removal of plants and microorganisms in the medium, the sewage flows out of the surface flow area 3, and then flows through the underflow area 7, the surface flow area 3 and the underflow area 7 in sequence. The aquatic plants 6 planted in the subsurface flow area 7 and the surface flow area 3, such as wild grass, cattails, reeds, rushes, duckweed, water lily, etc., can directly absorb nutrients such as nitrogen and phosphorus, heavy metals and Toxic and harmful substances, and transform them into plant components. Finally, the purified sewage is discharged into the outlet pool 11 through two outlet pipes 4 at the right end of the wetland.

Claims (7)

1. latent surface low alternate wetland, comprise the outer enclosure wall of wetland, water-in, water outlet, the undercurrent zone, surface current zone and wetland plant, it is characterized in that: also comprise pump sump, outlet sump and division wall, wetland periphery two ends, the left and right sides within the walls is respectively equipped with pump sump and outlet sump, near advancing, the outlet sump place is provided with the undercurrent zone, midfeather is provided with wall undercurrent zone and surface current zone, separate by division wall between undercurrent zone and the surface current zone, on the undercurrent zone at two ends, the left and right sides, be respectively equipped with water-in and water outlet, undercurrent zone and above the surface current zone respectively kind be implanted with wetland plant.

2. according to the described latent surface low alternate wetland of claim 1, it is characterized in that: described undercurrent zone is followed successively by wetland plant, gravel bed and overburden layer from top to bottom.

3. according to the described latent surface low alternate wetland of claim 1, it is characterized in that: described water-in is positioned at the top of gravel bed, and water outlet is positioned at middle part under the gravel bed.

4. according to the described latent surface low alternate wetland of claim 1, it is characterized in that: the overburden layer in described undercurrent district and whole surface current zone are made of the rural area soil and the peat composed of rotten mosses.

5. according to the described latent surface low alternate wetland of claim 1, it is characterized in that: the earthing bed thickness 10-15cm in described undercurrent zone.

6. according to the described latent surface low alternate wetland of claim 1, it is characterized in that: described division wall is provided with aperture.

7. according to the described latent surface low alternate wetland of claim 1, it is characterized in that: described wetland plant is one or more in wild rice grass, cattail, reed, Rush, spatterdock, floating heart and the water lily.

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