CN116177795A - Artificial wetland system for treating sponge urban ditch discharge pollution - Google Patents
Artificial wetland system for treating sponge urban ditch discharge pollution Download PDFInfo
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- CN116177795A CN116177795A CN202310054960.5A CN202310054960A CN116177795A CN 116177795 A CN116177795 A CN 116177795A CN 202310054960 A CN202310054960 A CN 202310054960A CN 116177795 A CN116177795 A CN 116177795A
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Images
Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The invention discloses an artificial wetland system for treating sponge urban ditch pollution, which comprises the following components: a gravel bed disposed downstream of the row trench, the gravel bed comprising a water inlet, a first water outlet, and a plurality of gravel zones; a stabilizing pond arranged downstream of the gravel bed, the stabilizing pond comprising a sedimentation pond and a facultative pond which are arranged in sequence along the sewage flow direction; the surface flow wetland is arranged at the downstream of the stabilizing pond and is communicated with the facultative pond, and the surface flow wetland comprises a plurality of ecological floating islands and a second water outlet. The artificial wetland system is provided with three water purification barriers, and sewage discharged from the ditch is filtered and purified by a gravel bed, a stabilization pond and a surface flow wetland and then discharged into a river. The artificial wetland system with the water purification function, the water storage function and the ornamental function is formed by the gravel bed, the stabilization pond and the surface flow wetland, so that the ditch pollution can be reduced, the urban water elasticity can be enhanced, and the urban environment can be beautified.
Description
Technical Field
The invention relates to the technical field of wetlands. More particularly, the invention relates to an artificial wetland system for treating the ditch pollution of a sponge city.
Background
The urban sewage and the industrial sewage are firstly discharged to a sewage treatment plant for professional sewage treatment, the sewage treated by the sewage treatment plant is discharged into a river through a drain, and the urban rainwater is directly converged to the drain and is discharged into the river. The sewage treated by the sewage treatment plant generally belongs to secondary purified water, and still belongs to the sewage category, the water contains organic matters, pathogenic bacteria and heavy metals, and a large amount of sediment is entrained in rainwater, meanwhile, the sewage is influenced by long-term polluted water in the drainage ditch, and black and odorous bottom mud remains in the drainage ditch, so that the sewage in the drainage ditch is directly discharged into a river, the water quality of the river can be polluted, and the agricultural production is influenced. Generally, the sewage from the ditch is subjected to wetland purification treatment, so that pollutants are reduced, the quality of the sewage from the ditch is improved, and then the water is discharged to a natural river.
The sponge city is a city which can be like a sponge and has good elasticity in the aspects of adapting to environmental changes, responding to natural disasters caused by rainwater, and the like, and can be also called as a 'water elasticity city'. In recent years, it has become a mainstream to construct an artificial wetland having a greening and water purifying function and a water storage and drainage function by purifying urban sewage and rainwater by using the artificial wetland. However, the existing wetland system has the problems of extra land occupation, poor wetland sewage purifying capacity, low water storage capacity, pollution to the wetland water purifying system and malodor emission.
Disclosure of Invention
The invention relates to a comprehensive development project for a Galaxy area in a gold lake along the north two lines of the eastern camping city. The invention provides an artificial wetland system for treating sponge urban ditch pollution, which is provided with three water purification barriers, can purify ditch sewage, and has a water storage function and an ornamental function.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an artificial wetland system for treating sponge urban ditch pollution, comprising:
the gravel bed is arranged at the downstream of the row ditch and comprises a water inlet, a first water outlet and a plurality of gravel areas, wherein the water inlet is communicated with the tail end of the row ditch, the plurality of gravel areas are sequentially paved along the sewage flowing direction, and the gravel diameters of the gravel areas are gradually reduced;
the stabilizing pond is arranged at the downstream of the gravel bed and comprises a sedimentation pond and a facultative pond which are sequentially arranged along the flowing direction of sewage, the sedimentation pond is communicated with the first water outlet, a sludge sedimentation pond is arranged in the sedimentation pond, and an aeration assembly and a filler assembly are arranged in the facultative pond;
the surface flow wetland is arranged at the downstream of the stabilizing pond and is communicated with the facultative pond, and comprises a plurality of ecological floating islands and a second water outlet, and the second water outlet is communicated with a river.
Preferably, the number of the gravel areas is 3, the first gravel area, the second gravel area and the third gravel area are sequentially arranged along the flowing direction of sewage, and the gravel diameters of the first gravel area, the second gravel area and the third gravel area are sequentially 60mm, 40mm and 20mm.
Preferably, the water inlet of the gravel bed is provided with a strip-shaped water distribution channel, the water distribution channel comprises a plurality of water distribution openings, the water distribution openings are arranged on the upper portion of the water distribution channel, the water distribution openings are communicated with the upper layer of the first gravel area, the first water outlet of the gravel bed is provided with a strip-shaped water collection channel, the water collection channel comprises a plurality of water collection openings, the water collection openings are arranged on the lower portion of the water collection channel, and the water collection openings are communicated with the lower layer of the third gravel area.
Preferably, the number of the sedimentation ponds is two, the number of the facultative ponds is two, and the two sedimentation ponds and the two facultative ponds are arranged in a staggered manner and are communicated in sequence.
Preferably, the mud sedimentation tank is internally provided with an adsorption filler and a mud suction pipe, a first drain pipe is arranged between the first water outlet and the sedimentation tank, the first drain pipe stretches into the mud sedimentation tank, and the drain end of the first drain pipe stretches into the bottom of the adsorption filler.
Preferably, a flow regulating weir is arranged between the sedimentation pond and the facultative pond, a water inlet channel is arranged on the side wall adjacent to the sedimentation pond and internally provided with a liquid level meter, a slag groove, a water suction pump and a second drain pipe, the second drain pipe is communicated with the facultative pond, and the slag groove is arranged below the water inlet channel.
Preferably, a support frame is arranged in the facultative pond, the aeration assembly comprises an aerator and an ozone generator, the aerator and the ozone generator are arranged on the support frame, the aerator comprises a plurality of aeration pipes, and the ozone generator comprises a plurality of ozone pipes.
Preferably, the packing assembly comprises a plurality of first packing devices and a plurality of second packing devices, the first packing devices are hung on the upper water surface of the facultative pond, gravel and aerobic bacteria are placed in the first packing devices, undulating gravel blocks are paved at the bottom of the facultative pond, the second packing devices are sunk on the gravel blocks, and gravel and anaerobic bacteria are placed in the second packing devices.
Preferably, the ecological floating island comprises a basal layer and a slope protection, submerged plants, emergent aquatic plants and terrestrial plants are sequentially planted from the slope bottom to the basal layer of the slope protection, the basal layer of the ecological floating island comprises a raw soil layer, an plain soil layer and thick planting soil from the lower layer to the upper layer, and flow blocking plates are arranged around the ecological floating island.
Preferably, the wetland distress road is laid around the junction of the sedimentation pond and the facultative pond.
The invention at least comprises the following beneficial effects:
the first artificial wetland system is provided with three water purification barriers, and sewage discharged from the ditch is filtered and purified by the gravel bed, the stabilization pond and the surface flow wetland and then discharged into a river. The sewage water quality of the sewage after the sewage is filtered and purified is improved through three water quality purification barriers, and is close to the water quality of a river, so that the sewage basically has no pollution to the river and agricultural production. The stabilizing pond and the surface flow wetland are formed by reforming the original pit pond and the original wetland, the reforming cost is low, and the land area is not required to be occupied additionally. The stable pond and the surface flow wetland are natural water storage ponds, store a large amount of rainwater in a rainy season, buffer drainage pressure of a river, release water storage to the river in a dry season and relieve drought conditions of the river. The artificial wetland system with the water purification function, the water storage function and the ornamental function is formed by the gravel bed, the stabilization pond and the surface flow wetland, so that the ditch pollution can be reduced, the urban water elasticity can be enhanced, and the urban environment can be beautified.
The diameter of the gravel in the second gravel area is gradually reduced, and suspended matters with different sizes can be adsorbed and precipitated step by step.
And thirdly, the water distribution channel and a plurality of water distribution openings thereof, the water receiving channel and a plurality of water receiving openings thereof are arranged to guide sewage to flow through the horizontal positions of the gravel bed and to guide sewage to flow from the upper layer to the lower layer of the gravel area, so that the sewage can fully flow through the positions of the gravel bed and fully utilize the gravel bed.
Fourth, set up the mud sedimentation tank in the sedimentation tank, when discharging mud, only need to carry out blowdown mud to the mud in the mud sedimentation tank and handle, need not to carry out the mud treatment of discharging to the sedimentation tank, reduce the mud work load of discharging.
Fifth, stabilizing pond and facultative pond utilize original pit pool and wetland transformation to form, stabilizing pond and facultative pond purify the water area big, are close natural purification environment, are provided with simple aeration subassembly and packing subassembly in the facultative pond only, and aeration subassembly and packing subassembly can long-term stable work, reduce construction cost and cost of maintenance.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a top view of an constructed wetland system according to the invention;
FIG. 2 is a cross-sectional view of a gravel bed according to the invention;
FIG. 3 is a schematic structural view of the stabilization pond according to the present invention;
fig. 4 is a schematic structural diagram of the ecological floating island according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The terms "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present invention based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
As shown in fig. 1 to 3, the present invention provides an artificial wetland system for treating sponge urban ditch pollution, comprising:
a gravel bed 100 disposed downstream of the trench, the gravel bed 100 including a water inlet 110, a first water outlet 120, and a plurality of gravel areas 130, the water inlet 110 being in communication with the end of the trench, the plurality of gravel areas 130 being sequentially laid along a sewage flow direction, and the gravel diameters of the gravel areas being gradually reduced;
a stabilizing pond 200 disposed downstream of the gravel bed 100, wherein the stabilizing pond 200 comprises a sedimentation pond 210 and a facultative pond 220 which are sequentially disposed along the sewage flowing direction, the sedimentation pond 210 is communicated with the first water outlet 120, a sludge sedimentation pond 211 is disposed in the sedimentation pond 210, and an aeration assembly 221 and a packing assembly 222 are disposed in the facultative pond 220;
the surface flow wetland 300 is arranged at the downstream of the stabilizing pond 200, the surface flow wetland 300 is communicated with the facultative pond 220, the surface flow wetland 300 comprises a plurality of ecological floating islands 310 and a second water outlet 320, and the second water outlet 320 is communicated with a river.
In the technical scheme, the sewage flow purification direction is as follows: the sewage discharged from the ditch flows through the gravel bed 100, the stabilization pond 200 and the surface flow wetland 300 in sequence, is purified by three times of water bodies, and finally is discharged into a river.
The gravel bed 100 is provided with a water inlet 110, a plurality of gravel areas 130, and a first water outlet 120 in this order along the flow direction of sewage, wherein the water inlet 110 communicates with the end of the trench. The gravel bed 100 is formed by sequentially paving an plain soil layer 140, a clay layer 141, geotextiles 142, a gravel layer 143, a broken stone anti-impact layer 144 from bottom to top, and planting aquatic plants on the broken stone anti-impact layer 144. The gravel layer 143 is a layer of thick gravel laid, and the gravel layer 143 is divided into a plurality of gravel areas 130 according to the diameter of the gravel laid, and the gravel diameters of the plurality of gravel areas 130 gradually decrease along the flowing direction of the sewage. The sewage discharged from the drain is discharged into the gravel bed 100 from the water inlet 110, sequentially flows through the plurality of gravel regions 130, and is discharged from the first water outlet 120. The gravel bed 100 has physical purification effect on sewage, and gaps among the gravel have sedimentation, adsorption and interception effects on a large amount of solid suspended matters entrained in the sewage, and the gravel diameter of the gravel area is gradually reduced, so that the suspended matters with different sizes can be adsorbed and sedimented step by step. Meanwhile, the gravel bed 100 has biological purification effect on sewage, microorganisms are attached to the root systems of the aquatic plants and the surfaces of the gravel, the microorganisms form a biological film, the biological film has adsorption effect, and the biological film adsorbs organic matters in the water body and oxidizes and decomposes the organic matters; the bottom of the gravel is in an anoxic state, and anaerobic bacteria at the bottom of the gravel can carry out denitrification reaction.
The sewage flows out through the first water outlet 120 and is discharged into the stabilization pond 200. The stabilization pond 200 comprises a sedimentation pond 210 and a facultative pond 220, and sewage sequentially flows through the sedimentation pond 210 and the facultative pond 220 for secondary water quality purification. The sedimentation pond 210 is internally provided with a mud sedimentation pond 211, sewage is firstly discharged into the bottom of the mud sedimentation pond 211, the mud sedimentation pond 211 adsorbs, filters and sediments solid pollutants in the sewage, water on the upper layer of the mud sedimentation pond 211 overflows and flows into the sedimentation pond 210, a large amount of mud and solid pollutants are trapped in the mud sedimentation pond 211, and a small amount of mud and solid pollutants continue to be sedimented in the sedimentation pond 210. Because the sedimentation tank 210 occupies a large area and is irregular, the sludge is difficult to discharge, and therefore, the sludge sedimentation tank 211 is arranged in the sedimentation tank 210. When the sludge is discharged, only the sludge in the sludge sedimentation tank 211 is required to be treated, and the sedimentation tank 210 is not required to be treated, so that the sludge discharge workload is reduced.
The sewage after being deposited and filtered by the deposition pond 210 flows into the facultative pond 220, the part of the upper layer of the facultative pond 220, which is penetrated by sunlight, is an aerobic area, a great amount of oxygen is released by the photosynthesis of algae, and the organic matters are oxidized and decomposed by aerobic microorganisms, so that ammonia nitrogen in the water body is decomposed and converted into nitrite and nitrate; the bottom layer of the facultative pond 220 is an anaerobic zone, and the anaerobic microorganisms reduce nitrate and nitrite in the sewage to ammonia. The aeration component 221 is used for aerating the upper layer of the facultative pond 220, increasing the oxygen content in water and the oxidative decomposition of aerobic microorganisms on organic matters, and the aeration component 221 can also be used for introducing ozone into the facultative pond 220 to remove odor emitted in the pond. The upper layer and the bottom layer of the facultative pond 220 are provided with filler components 222, and aerobic bacteria are arranged in the filler components of the upper layer, so that the oxidative decomposition of organic matters by the aerobic microorganisms is increased; anaerobic bacteria are arranged in the bottom layer filling component, so that the decomposition of anaerobic microorganisms on organic matters is increased.
A third drain pipe and a water pump are arranged between the facultative pond 220 and the surface flow wetland 300, and the third drain pipe and the water pump the water in the facultative pond 220 into the surface flow wetland 300. A plurality of ecological floating islands 310 are arranged in the surface flow wetland 300, and the ecological floating islands 310 play a role in: firstly, the area of the ecological floating island 310 is utilized to shade sun, inhibit photosynthesis of underwater phytoplankton, inhibit growth of phytoplankton and improve transparency of water; secondly, planting a large number of plants on the surface of the ecological floating island 310, forming a net surface by plant root systems, and adsorbing and filtering suspended matters in water; thirdly, the plants on the ecological floating island 310 perform photosynthesis, and the root systems of the plants absorb nitrogen, phosphorus and organic matters in the water body. The upper part of the ecological floating island 310 is used for birds to inhabit, and the lower part of the water body is used for survival of fish, shrimp and the like.
The constructed wetland system is provided with three water purification barriers, and sewage discharged from a ditch is filtered and purified by the gravel bed 100, the stabilization pond 200 and the surface flow wetland 300 and then discharged into a river. The sewage water quality of the sewage after the sewage is filtered and purified is improved through three water quality purification barriers, and is close to the water quality of a river, so that the sewage basically has no pollution to the river and agricultural production. The stabilizing pond 200 and the surface flow wetland 300 are formed by reforming the original pit pond and the original wetland, so that the reforming cost is low, and the land area is not required to be occupied additionally. The stabilization pond 200 and the surface flow wetland 300 are natural water reservoirs, store a large amount of rainwater in rainy seasons, buffer drainage pressure of rivers, release water to the rivers in dry seasons, and relieve drought conditions of the rivers. The gravel bed 100, the stabilization pond 200 and the surface flow wetland 300 form an artificial wetland system with a water body purifying function, a water storage function and an ornamental function, so that the ditch pollution can be reduced, the urban water elasticity can be enhanced, and the urban environment can be beautified.
In another embodiment, as shown in fig. 2, the number of gravel areas is 3, and the first gravel area 131, the second gravel area 132 and the third gravel area 133 are sequentially arranged along the flowing direction of the sewage, and the gravel diameters of the first gravel area 131, the second gravel area 132 and the third gravel area 133 are sequentially 60mm, 40mm and 20mm. The gravel bed 100 was sequentially provided with 3 gravel zones in the flow direction of the sewage, wherein the gravel diameter of the first gravel zone 131 was 60mm, the gravel diameter of the second gravel zone 132 was 40mm, the gravel diameter of the third gravel zone 133 was 20mm, and the sewage sequentially flowed through the first, second and third gravel zones 131, 132 and 133. The diameter of the gravel in the gravel area is gradually reduced, and suspended matters with different sizes are adsorbed and precipitated step by step.
In another technical solution, as shown in fig. 1 and 2, an elongated water distribution channel 111 is disposed at the water inlet 110 of the gravel bed 100, the water distribution channel 111 includes a plurality of water distribution ports 1111, the plurality of water distribution ports 1111 are disposed at the upper portion of the water distribution channel 111, the plurality of water distribution ports 1111 are communicated with the upper layer of the first gravel zone 131, an elongated water receiving channel 121 is disposed at the first water outlet 120 of the gravel bed 100, the water receiving channel 121 includes a plurality of water receiving ports 1211, the plurality of water receiving ports 1211 are disposed at the lower portion of the water receiving channel 121, and the plurality of water receiving ports 1211 are communicated with the lower layer of the third gravel zone 133.
The water distribution channel 111 is arranged at the water inlet 110, the water distribution channel 111 is a strip-shaped water diversion channel arranged along the length direction of the gravel bed 100, a plurality of water distribution openings 1111 are arranged at the upper part of the water distribution channel 111 along the length direction of the water distribution channel 111, and the water distribution openings 1111 are communicated with the upper layer of the first gravel zone 131; the first water outlet 120 is provided with a water receiving channel 121, the water receiving channel 121 is a strip-shaped water diversion channel arranged along the length direction of the gravel bed 100, the lower part of the water receiving channel 121 is provided with a plurality of water receiving ports 1211 along the length direction of the water receiving channel 121, and the water receiving ports 1211 are communicated with the lower layer of the third gravel zone 133. The arrangement of the water distribution channel 111 and a plurality of water distribution openings 1111, the water receiving channel 121 and a plurality of water receiving openings 1211 guides sewage to flow through the gravel bed 100 horizontally; the water distribution ports 1111 are all communicated with the upper layer of the first gravel zone 131, and the water collection ports 1211 are all communicated with the lower layer of the third gravel zone 133, so as to guide sewage to flow from the upper layer to the lower layer of the gravel zone; allowing the wastewater to flow through the gravel bed 100 throughout the gravel bed 100 and fully utilize the gravel bed 100.
In another embodiment, as shown in fig. 1, two sedimentation ponds 210 are provided, two facultative ponds 220 are provided, and two sedimentation ponds 210 are staggered with and sequentially connected to two facultative ponds 220. The two sedimentation ponds 210 are respectively a first sedimentation pond and a second sedimentation pond, the two facultative ponds 220 are respectively a first facultative pond and a second facultative pond, the first sedimentation pond is communicated with the first facultative pond, and the second sedimentation pond is communicated with the second facultative pond.
In another technical solution, as shown in fig. 3, an adsorption filler 2111 and a suction pipe 2112 are disposed inside the sludge sedimentation tank 211, a first drain pipe 230 is disposed between the first water outlet 120 and the sedimentation tank 210 for communication, the first drain pipe 230 extends into the sludge sedimentation tank 211, and a drain end of the first drain pipe 230 extends into the bottom of the adsorption filler 2111.
The mud sedimentation tank 211 is internally provided with an adsorption filler 2111, the water inlet end of the first drain pipe 230 is communicated with the first water outlet 120, the water outlet end of the first drain pipe 230 stretches into the bottom of the adsorption filler 2111, and the adsorption filler 2111 is a filler such as quartz sand, ceramic granules and the like. The sewage is discharged from the bottom of the adsorption filler 2111, the sewage flows through the adsorption filler 2111 from bottom to top, the adsorption filler 2111 adsorbs and filters solid suspended matters and mud in the sewage, and the water after adsorption and filtration flows into the sedimentation pond 210 from the mud sedimentation pond 211. The adsorption packing 2111 adsorbed with the solid suspended matter and the sludge is discharged through a suction pipe 2112, and a suction pump is connected to the end of the suction pipe 2112.
In another technical solution, as shown in fig. 3, a flow regulating weir 400 is disposed between the sedimentation tank 210 and the facultative tank 220, a water inlet channel 410 is disposed on a side wall adjacent to the sedimentation tank 210, a liquid level meter 420, a slag groove 430, a water pump and a second water drain pipe 440 are disposed in the flow regulating weir 400, the second water drain pipe 440 is communicated with the facultative tank 220, and the slag groove 430 is disposed below the water inlet channel 410.
The water in the sedimentation tank 210 flows into the flow regulating weir 400 through the water inlet channel 410, a second water discharge pipe 440 is arranged in the flow regulating weir 400, a water pump is arranged on the second water discharge pipe 440, the water in the flow regulating weir 400 is pumped by the water pump, and the water in the flow regulating weir 400 flows into the facultative tank 220 through the second water discharge pipe 440. Wherein the water inlet channel 410 is communicated with the upper part of the sedimentation tank 210, so that the filtered and sedimented water at the upper layer of the sedimentation tank 210 flows into the flow regulating weir 400. The flow regulating weir 400 has a certain water storage capacity and controls the amount of water flowing into the facultative pond 220. Sometimes the water amount in the facultative tank 220 is large or the water purifying capacity is reduced, the flow regulating weir 400 plays a temporary water storage role, and the level gauge 420 monitors the water level change in the flow regulating weir 400 and controls the amount of water discharged into the facultative tank 220. A slag groove 430 is provided below the water inlet passage 410, and the slag groove 430 filters suspended matters in the water body.
In another embodiment, as shown in fig. 3, a supporting frame 223 is disposed in the facultative pond 220, the aeration assembly 221 includes an aerator 2211 and an ozone generator 2213, the aerator 2211 and the ozone generator 2213 are disposed on the supporting frame 223, the aerator 2211 includes a plurality of aeration pipes 2212, and the ozone generator 2213 includes a plurality of ozone pipes 2214.
The facultative pond 220 is internally provided with a supporting frame 223, an aerator 2211 and an ozone generator 2213 are arranged on the supporting frame 223, the aerator 2211 is provided with a plurality of aeration pipes 2212, the ozone generator 2213 is provided with a plurality of ozone pipes 2214, and the plurality of aeration pipes 2212 and the plurality of ozone pipes 2214 extend into water. The aerator 2211 aerates the water to increase the oxygen content of the upper water layer of the facultative pond 220 and promote the nitrification reaction of aerobic bacteria. The facultative tank 220 is likely to generate an odor in summer, and the ozone generator 2213 is used for introducing ozone gas into the facultative tank 220 to oxidize organic substances generating the odor.
In another aspect, as shown in fig. 3, the packing assembly 222 includes a plurality of first packing elements 2221 and a plurality of second packing elements 2222, the plurality of first packing elements 2221 are suspended on the upper water surface of the facultative pond 220, gravel and aerobic bacteria are placed in the first packing elements 2221, undulating gravel blocks are laid on the bottom of the facultative pond 220, a plurality of second packing elements 2222 are deposited on the gravel blocks, and gravel and anaerobic bacteria are placed in the second packing elements 2222.
A plurality of first packing devices 2221 are hung on the water surface around the facultative pond 220, the first packing devices 2221 extend into the upper water surface of the facultative pond 220, gravel and aerobic bacteria are placed in the first packing devices 2221, the aerobic bacteria are attached to the gravel, and the aerobic bacteria increase the nitrification reaction of the upper aerobic zone; the bottom of the facultative pond 220 is paved with undulating gravel blocks, anaerobic microorganisms are attached among the undulating gravel blocks to perform denitrification reaction, and the second stuffing 2222 with anaerobic bacteria are deposited on the gravel blocks, so that the anaerobic bacteria increase the denitrification reaction of the bottom anaerobic zone.
In another technical scheme, as shown in fig. 4, the ecological floating island 310 includes a substrate layer 311 and a slope protection 312, submerged plants 3121, emergent aquatic plants 3122 and terrestrial plants 3123 are sequentially planted from the bottom to the substrate layer 311 of the slope protection 312, the substrate layer 311 of the ecological floating island 310 sequentially includes a raw soil layer 3111, a plain soil layer 3112 and thick planting soil 3113 from the lower layer to the upper layer, and the periphery of the ecological floating island 310 is provided with a baffle 313.
The ecological floating island 310 is provided with slope protection 312 around, and the slope protection 312 plays a role in protecting the ecological floating island 310. The slope protection 312 and the submerged plants 3121, the emergent aquatic plants 3122 and the terrestrial plants 3123 planted on the basal layer 311 have a large number of root systems, absorb and decompose organic matters in water, the basal layer 311 sequentially comprises an original soil layer 3111, an plain soil layer 3112 and thick planting soil 3113 from the lower layer to the upper layer, the original soil layer 3111 is paved on the surface flow wetland 300 and tamped, the upper layer is the thick planting soil 3113 for planting the terrestrial plants 3123, and the plain soil with viscosity is arranged between the original soil layer 3111 and the thick planting soil 3113. The baffle plates 313 are arranged around the ecological floating island 310, the baffle plates 313 increase the resistance of water, the residence time of water around the ecological floating island 310 is increased, and then the absorption and purification of the plant root system to organic matters are increased.
In another alternative, as shown in fig. 1, a wetland distress link 500 is laid around the junction of the sedimentation tank 210 and the facultative tank 220. The worker performs the sludge discharging operation on the sludge settling tank 211, and completes the maintenance of the aeration assembly 221, the replacement of the first packing 2221, the second packing 2222, and the like on the wetland distress road 500.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. A constructed wetland system for administering sponge city ditch pollution, its characterized in that includes:
the gravel bed is arranged at the downstream of the row ditch and comprises a water inlet, a first water outlet and a plurality of gravel areas, wherein the water inlet is communicated with the tail end of the row ditch, the plurality of gravel areas are sequentially paved along the sewage flowing direction, and the gravel diameters of the gravel areas are gradually reduced;
the stabilizing pond is arranged at the downstream of the gravel bed and comprises a sedimentation pond and a facultative pond which are sequentially arranged along the flowing direction of sewage, the sedimentation pond is communicated with the first water outlet, a sludge sedimentation pond is arranged in the sedimentation pond, and an aeration assembly and a filler assembly are arranged in the facultative pond;
the surface flow wetland is arranged at the downstream of the stabilizing pond and is communicated with the facultative pond, and comprises a plurality of ecological floating islands and a second water outlet, and the second water outlet is communicated with a river.
2. The constructed wetland system for treating urban ditch pollution in a sponge city according to claim 1, wherein the number of the gravel areas is 3, the first gravel area, the second gravel area and the third gravel area are sequentially arranged along the flowing direction of sewage, and the gravel diameters of the first gravel area, the second gravel area and the third gravel area are sequentially 60mm, 40mm and 20mm.
3. The constructed wetland system for treating sponge urban ditch pollution according to claim 2, wherein the water inlet of the gravel bed is provided with a strip-shaped water distribution ditch, the water distribution ditch comprises a plurality of water distribution ports, the water distribution ports are arranged at the upper part of the water distribution ditch, the water distribution ports are communicated with the upper layer of the first gravel area, the first water outlet of the gravel bed is provided with a strip-shaped water receiving ditch, the water receiving ditch comprises a plurality of water receiving ports, the water receiving ports are arranged at the lower part of the water receiving ditch, and the water receiving ports are communicated with the lower layer of the third gravel area.
4. The constructed wetland system for treating sponge urban ditch pollution according to claim 1, wherein two sedimentation ponds are provided, two facultative ponds are provided, and the two sedimentation ponds are staggered with and sequentially communicated with the two facultative ponds.
5. The constructed wetland system for treating urban ditch pollution according to claim 1, wherein an adsorption filler and a mud suction pipe are arranged inside the mud sedimentation tank, a first drain pipe is arranged between the first water outlet and the sedimentation tank, the first drain pipe stretches into the mud sedimentation tank, and the drain end of the first drain pipe stretches into the bottom of the adsorption filler.
6. The constructed wetland system for treating sponge urban ditch pollution according to claim 1, wherein a flow regulating weir is arranged between the sedimentation pond and the facultative pond, a water inlet channel is arranged on the side wall adjacent to the flow regulating weir and the sedimentation pond, a liquid level meter, a slag groove, a water suction pump and a second drain pipe are arranged in the flow regulating weir, the second drain pipe is communicated with the facultative pond, and the slag groove is arranged below the water inlet channel.
7. The constructed wetland system for treating sponge urban ditch pollution according to claim 1, wherein a support frame is arranged in the facultative pond, the aeration assembly comprises an aerator and an ozone generator, the aerator and the ozone generator are arranged on the support frame, the aerator comprises a plurality of aeration pipes, and the ozone generator comprises a plurality of ozone pipes.
8. The constructed wetland system for treating urban ditch pollution in a sponge city according to claim 1, wherein the filler assembly comprises a plurality of first fillers and a plurality of second fillers, wherein the first fillers are suspended on the upper water surface of the facultative pond, gravel and aerobic bacteria are placed in the first fillers, the bottom of the facultative pond is paved with undulating gravel blocks, a plurality of second fillers are sunk on the gravel blocks, and gravel and anaerobic bacteria are placed in the second fillers.
9. The constructed wetland system for treating sponge urban ditch pollution according to claim 1, wherein the ecological floating island comprises a basal layer and a slope protection, submerged plants, emergent aquatic plants and terrestrial plants are sequentially planted from the slope bottom of the slope protection to the basal layer, the basal layer of the ecological floating island comprises a raw soil layer, a plain soil layer and thick planting soil from the lower layer to the upper layer, and the periphery of the ecological floating island is provided with a flow baffle.
10. The constructed wetland system for treating sponge urban ditch pollution according to claim 1, wherein wetland distress roads are laid around the junction of the sedimentation pond and the facultative pond.
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