CN106277338A - Ecological purification system for river regulation - Google Patents
Ecological purification system for river regulation Download PDFInfo
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- CN106277338A CN106277338A CN201610676456.9A CN201610676456A CN106277338A CN 106277338 A CN106277338 A CN 106277338A CN 201610676456 A CN201610676456 A CN 201610676456A CN 106277338 A CN106277338 A CN 106277338A
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- 238000000746 purification Methods 0.000 title claims abstract description 40
- 230000033228 biological regulation Effects 0.000 title claims abstract description 35
- 239000010865 sewage Substances 0.000 claims abstract description 88
- 230000006641 stabilisation Effects 0.000 claims abstract description 47
- 238000011105 stabilization Methods 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 42
- 238000001914 filtration Methods 0.000 claims abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 122
- 239000000945 filler Substances 0.000 claims description 40
- 238000005192 partition Methods 0.000 claims description 40
- 238000012856 packing Methods 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 241000251468 Actinopterygii Species 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 claims description 2
- 230000003588 decontaminative effect Effects 0.000 claims description 2
- 238000005067 remediation Methods 0.000 claims 1
- 241000196324 Embryophyta Species 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005273 aeration Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 241000383620 Allium mongolicum Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 235000005273 Canna coccinea Nutrition 0.000 description 1
- 240000008555 Canna flaccida Species 0.000 description 1
- 241000252229 Carassius auratus Species 0.000 description 1
- 241000931336 Chloris truncata Species 0.000 description 1
- 241000252233 Cyprinus carpio Species 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 241000252234 Hypophthalmichthys nobilis Species 0.000 description 1
- 241000209490 Nymphaea Species 0.000 description 1
- 235000016791 Nymphaea odorata subsp odorata Nutrition 0.000 description 1
- 240000001398 Typha domingensis Species 0.000 description 1
- 241000746966 Zizania Species 0.000 description 1
- 235000002636 Zizania aquatica Nutrition 0.000 description 1
- 230000004099 anaerobic respiration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000002244 precipitate Substances 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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
- 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
-
- 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
-
- 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
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- 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)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention provides a kind of ecological purification system for river regulation, including being sequentially connected logical grid pond, regulating reservoir, distributing channel, artificial swamp, stabilization pond and sump；Wherein, sewage is after the preliminary filtration in grid pond, entrance regulating reservoir carries out homogenizing and all measures regulation, it is adjusted the sewage after the regulation of pond and enters distributing channel, filter further then in turn through stair-stepping multistage artificial swamp, sewage enters stabilization pond after the filtration treatment of multistage artificial swamp, purifies in stabilization pond, and the sewage after stabilization pond purifies is discharged downstream river course by sump.The ecological purification system not only low cost that the present invention provides, and the treatment effeciency of sewage is the highest, simultaneously, additionally it is possible to beautify the environment.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to an ecological purification system for river regulation.
Background
With the development of urban scale and socioeconomic performance, urban watercourses are polluted to varying degrees. Some river channels have the problems of being incapable of surviving by some aquatic organisms due to insufficient turbidity, less clear water, more water and eutrophication, even being mixed with fishy smell and the like. Even if the river bank scene can be improved for a long time and in a large amount of economy, the scene around the river channel is affected by the sewage in the river channel.
In recent years, water pollution control technology has gradually shifted from the original centralized treatment to decentralized and on-site treatment. Among them, the research of ecological process technology has been more promising in recent years. The artificial wetland is applied in the ecological process technology to fully exert the potential of each component in the wetland system, thereby achieving the double benefits of environment and economy, being a cheap alternative scheme of the traditional sewage treatment process in many fields, and obtaining better effects when being applied to the fields of source control, in-situ ecological restoration, drainage basin pollution control and the like.
In the traditional artificial wetland, the flow velocity of sewage in the artificial wetland is relatively gentle, so that the dissolved oxygen level of the substrate of the artificial wetland is low, and the sewage treatment efficiency of the wetland is limited. At present, the method for improving the sewage treatment efficiency of the artificial wetland mainly comprises the steps of optimizing and combining substrates, aquatic plants and microorganisms in the artificial wetland, assisting biological strengthening treatment, increasing an artificial aeration device and the like, and although the sewage treatment efficiency of the artificial wetland can be improved to different degrees, the result is still not ideal. How to scientifically and effectively improve the sewage treatment efficiency of the artificial wetland, thereby solving the bottleneck problem that the occupied area of the artificial wetland is large, and solving the problem that the further development of the artificial wetland needs to be solved.
Disclosure of Invention
In view of the above problems, the present invention is to provide an ecological purification system for river regulation, which solves the problems of low sewage treatment efficiency and large occupied area of the artificial wetland.
The invention provides an ecological purification system for river regulation, which comprises a grid pond, a regulating pond, a water distribution channel, an artificial wetland, a stabilization pond and a water collection well which are sequentially communicated; wherein, the sewage of the upstream river channel is primarily filtered by the grid tank and then enters the regulating tank for regulation, and the sewage regulated by the regulating tank enters the water distribution channel; a triangular weir is arranged in the water distribution channel, and the regulated sewage is introduced into the artificial wetland through the triangular weir; the artificial wetland comprises a surface flow wetland and an undercurrent wetland which are in a step shape; wherein, the surface flow wetland and the subsurface flow wetland are connected by a reclaimed water collecting and distributing device; surface flow layers, a first packing layer, a second packing layer and a third packing layer are sequentially arranged in the surface flow wetland and the subsurface flow wetland from top to bottom, water pipes are uniformly distributed on the surface flow layers of the surface flow wetland and the subsurface flow wetland, and seepage drainage pipes are arranged at the bottoms of the third packing layers of the surface flow wetland and the subsurface flow wetland; the sewage after being adjusted is introduced into the surface flow wetland, the introduced sewage is uniformly distributed through water pipes distributed on the surface flow layer of the surface flow wetland, and after being filtered by the first packing layer, the second packing layer and the third packing layer of the surface flow wetland in sequence, the filtered sewage is introduced into the subsurface flow wetland through the seepage drainage pipe arranged at the bottom of the third packing layer of the surface flow wetland and the reclaimed water collection water distribution device; the sewage filtered by the surface flow wetland is uniformly distributed by a water pipe distributed on the surface flow layer of the subsurface flow wetland, the introduced sewage filtered by the surface flow wetland is filtered by a first filler layer, a second filler layer and a third filler layer of the subsurface flow wetland in sequence, and then the sewage filtered by the subsurface flow wetland is introduced into a stabilization pond by a seepage drainage pipe arranged at the bottom of the third filler layer of the subsurface flow wetland; and purifying the sewage filtered by the subsurface flow wetland in the stabilization pond, and discharging the sewage purified by the stabilization pond into a downstream river channel through a water collecting well.
Further, a preferable structure is: the artificial wetland system at least comprises two stages of step-shaped artificial wetlands, wherein each stage of artificial wetland comprises a surface flow wetland and an undercurrent wetland; the surface flow wetland of the first stage of artificial wetland is connected with the water distribution channel, and the subsurface flow wetland of the last stage of artificial wetland is connected with the stabilization pond.
Further, a preferable structure is: the areas of the grid pond, the adjusting pond, the artificial wetland and the stabilization pond are as follows: 1: 1: 1, setting; water-proof dams are respectively arranged among the grid pond, the regulating pond, the artificial wetland and the stabilizing pond, and a natural fall of 0.1m is sequentially formed among the water-proof dams.
Further, a preferable structure is: the grating is obliquely arranged in the grating tank, and the inclination angle of the grating is between 45 and 75 degrees; one side of the grid pond is provided with a water inlet, the other side of the grid pond is provided with a water outlet, sewage of an upstream river channel enters the grid pond through the water inlet of the grid pond, is primarily filtered by the grid and then is discharged into the regulating pond through the water outlet of the grid pond; wherein, the horizontal height of the water inlet of the grating tank is higher than that of the water outlet of the grating tank.
Further, a preferable structure is: one side of the regulating tank is provided with a water inlet, the other side of the regulating tank is provided with a water outlet, sewage primarily filtered by the grating tank enters the regulating tank from the water inlet, and enters the water distribution channel from the water outlet of the regulating tank after being homogenized and uniformly regulated by the regulating tank; the adjusting tank consists of a tank body, a transverse partition wall and a longitudinal partition wall; wherein, the longitudinal partition walls are respectively and vertically arranged at the upper side and the lower side of the tank body, and the longitudinal partition walls vertical to the upper side and the longitudinal partition walls vertical to the lower side are arranged at intervals; the transverse partition walls are respectively and vertically arranged on the left side and the side of the longitudinal partition wall of the adjusting tank, and the transverse partition walls vertical to the left side of the adjusting tank and the transverse partition walls vertical to the longitudinal partition wall are arranged at intervals.
Further, a preferable structure is: the number of the longitudinal partition walls is 3-6, and the number of the transverse partition walls is 2-5.
Further, a preferable structure is: water purification plants are planted on the surface flow layers of the surface flow wetland and the subsurface flow wetland; the fillers of the first filler layers of the surface flow wetland and the subsurface flow wetland are blast furnace slag with the particle size of 6mm-10mm, the fillers of the second filler layers of the surface flow wetland and the subsurface flow wetland are crushed stone with the particle size of 10mm-20mm, and the fillers of the third filler layers of the surface flow wetland and the subsurface flow wetland are zeolite with the particle size of 20mm-30 mm.
Further, a preferable structure is: a perforated plate is arranged above one end of the subsurface flow wetland close to the surface flow wetland to form a water drop platform, and the width of the perforated plate is equal to that of the subsurface flow wetland.
Further, a preferable structure is: the depth of the stabilization pond is 1.2m-2.0m, the thickness of sludge in the stabilization pond is 0.3m, and an ecological system of the stabilization pond is constructed by planting emergent aquatic plants, floating plants and cultivating ornamental fishes in the stabilization pond.
Further, a preferable structure is: the bottom of the water collecting well is provided with a water collecting tank which is sunken downwards, a lifting pump is arranged in the water collecting tank, and water entering the water collecting well is discharged into a downstream river channel through the lifting pump.
The ecological purification system for river regulation provided by the invention is used as a practical and efficient sewage treatment and recycling technology, and has the following beneficial effects:
1. the treatment energy consumption is low, the operation is convenient, the environment can be beautified, the operation period of the artificial wetland is prolonged, and the decontamination efficiency of the artificial wetland is improved;
2. on the basis of a multi-stage structure, pollutants are removed through grid pond filter residues, a regulating pond for homogenizing water quality and water quantity, a multi-stage artificial wetland and a stabilizing pond in sequence, so that effective treatment of sewage is completed, and effective combination of biological strengthening treatment and artificial wetland purification is realized;
3. the water passing area is maximized, so that a water body acts with a substrate and a plant root system as much as possible, the effective combination of drop aeration and the artificial wetland is realized, the biological purification capacity of the wetland is improved, sewage enters the next stage at the water outlet of each stage of artificial wetland in a drop mode, aeration and oxygenation are carried out on the sewage in the process, aerobic, anoxic and anaerobic areas are formed in the artificial wetland of the next purification layer, and the formation of the nitrification and denitrification conditions of nitrogen is facilitated;
4. the ecological purification system has strong adaptability to water quality and water quantity change and wide application range, and can increase the stage number of a three-dimensional structure if the pollution concentration of the inlet water quality is higher or the requirement of the outlet water quality is improved, wherein the three-dimensional structure is the ecological purification system for river regulation provided by the invention.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an ecological purification system for river regulation according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a regulating reservoir of an ecological purification system for river regulation according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a sump of an ecological purification system for river regulation according to an embodiment of the invention.
The same reference numbers in all figures indicate similar or corresponding features or functions.
In the figure: the system comprises a river channel 1, a grid pool 2, a grid 3, a water-stop dam 4, an adjusting pool 5, a water distribution channel 6, a surface flow wetland 71, an undercurrent wetland 72, a reclaimed water collection and distribution device 8, a stabilizing pond 9, a water collecting well 10, a transverse partition wall 11, a longitudinal partition wall 12, a water collecting tank 13, a lifting pump 14 and a pool body 15.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Aiming at the problems of low sewage treatment efficiency and large occupied area of the conventional artificial wetland, the invention constructs an ecological purification system by sequentially connecting a grid pond, an adjusting pond, a water distribution channel, the artificial wetland, a stabilization pond and a water collection well, after sewage enters the ecological purification system, the sewage enters the adjusting pond for homogeneous uniform quantity adjustment after being primarily filtered by the grid pond, the sewage adjusted by the adjusting pond enters the water distribution channel, then is further filtered by a stepped multistage artificial wetland in sequence, the sewage enters the stabilization pond after being filtered by the multistage artificial wetland, is purified in the stabilization pond, and the sewage purified by the stabilization pond is discharged into a downstream river channel through the water collection well. The ecological purification system for river regulation provided by the invention has the advantages of low cost, high sewage treatment efficiency and capability of beautifying the environment.
In order to illustrate the ecological purification system for river regulation provided by the present invention, fig. 1 shows the structure of the ecological purification system for river regulation according to the embodiment of the present invention.
As shown in fig. 1, the ecological purification system for river regulation provided by the invention comprises a grid pond 2, a regulating pond 5, a distribution canal 6, an artificial wetland, a stabilization pond 9 and a water collection well 10 which are arranged in a river 1 and communicated in sequence. Wherein, the areas of the grid pond 2, the adjusting pond 5, the constructed wetland and the stabilization pond 9 are as follows 1: 1: 1: 1, setting; and water-proof dams 4 are respectively arranged among the grid pond 2, the regulating pond 5, the artificial wetland and the stabilizing pond 9, a natural fall of 0.1m is sequentially formed among the water-proof dams, and sewage can automatically flow to the next flow path through the arranged water-proof dams 4.
Specifically, the sewage in the upstream river channel is primarily filtered by the grid tank 2 and then enters the regulating tank 5 for regulation, and the sewage regulated by the regulating tank 5 enters the water distribution channel 6. Wherein, the grating 3 is obliquely arranged in the grating pool 2, and the inclination angle of the grating 3 is between 45 degrees and 75 degrees; be provided with the water inlet in one side of grid pond 2, the opposite side of grid pond 2 is provided with the delivery port, and the water inlet that the sewage of upper reaches river course passes through the grid pond gets into the grid pond, behind grid 3 prefilter (promptly through 3 heavy suspended solids or the floater of particle size of holding back and removing in the sewage), discharges into equalizing basin 5 through the delivery port of grid pond 2. Wherein, the horizontal height of the water inlet of the grating pool 2 is higher than that of the water outlet of the grating pool 2.
After the sewage primarily filtered by the grating tank 2 enters the regulating tank 5, the sewage is homogenized and uniformly regulated by the regulating tank 5. Wherein, a water inlet is arranged on one side of the adjusting tank 5, a water outlet is arranged on the other side, sewage primarily filtered by the grating tank 2 enters the adjusting tank 5 from the water inlet, and enters the water distribution channel 6 from the water outlet of the adjusting tank 5 after the uniform homogeneity and the uniform quantity adjustment are carried out by the adjusting tank 5. Fig. 2 shows a structure of a conditioning tank of an ecological purification system for river regulation according to an embodiment of the present invention.
As shown in fig. 2, the adjusting tank 5 is composed of a tank body 15, a transverse partition wall 11 and a longitudinal partition wall 12. Wherein, the longitudinal partition walls 12 are respectively vertically arranged at the upper side and the lower side of the tank body 15, and the longitudinal partition walls vertical to the upper side and the longitudinal partition walls vertical to the lower side are arranged at intervals; the transverse partition walls 11 are respectively vertically arranged on the left side and the longitudinal partition wall side of the adjusting tank 5, and the transverse partition walls vertical to the left side of the adjusting tank 5 and the transverse partition walls vertical to the longitudinal partition wall side are arranged at intervals. Specifically, the number of the longitudinal partition walls is 3-6, and the number of the transverse partition walls is 2-5; in one example of the present invention, when the number of the longitudinal partition walls is 6 and the number of the transverse partition walls is 4, a good effect of adjusting the uniform amount of homogeneity can be achieved.
The sewage adjusted by the adjusting tank 5 enters the water distribution channel 6 from the water outlet of the adjusting tank, a triangular weir is arranged in the water distribution channel 6, and the adjusted sewage is introduced into the artificial wetland through the triangular weir. The artificial wetland comprises a surface flow wetland 71 and a subsurface flow wetland 72 which are in a step shape.
Wherein, the surface flow wetland 71 and the subsurface flow wetland 72 are connected by the middle water collecting and distributing device 8; surface flow layers, a first packing layer, a second packing layer and a third packing layer are sequentially arranged in the surface flow wetland 71 and the subsurface flow wetland 72 from top to bottom, water pipes are uniformly distributed on the surface flow layers of the surface flow wetland and the subsurface flow wetland, and seepage drainage pipes are arranged at the bottoms of the third packing layers of the surface flow wetland and the subsurface flow wetland; the seepage drainage pipe arranged at the bottom of the third filler layer of the surface flow wetland 71 is connected with the reclaimed water collecting and distributing device, the regulated sewage is introduced into the surface flow wetland 71, the introduced sewage is uniformly distributed through the water pipes distributed on the surface flow layer of the surface flow wetland, the introduced sewage is filtered by the first filler layer, the second filler layer and the third filler layer of the surface flow wetland 71 in sequence, and then the filtered sewage is introduced into the subsurface flow wetland 72 through the seepage drainage pipe arranged at the bottom of the third filler layer of the surface flow wetland and the reclaimed water collecting and distributing device.
The sewage filtered by the surface flow wetland is uniformly distributed by the water pipes distributed on the surface flow layer of the subsurface flow wetland, the introduced sewage filtered by the surface flow wetland 71 is filtered by the first filler layer, the second filler layer and the third filler layer of the subsurface flow wetland 72 in sequence, and then the sewage filtered by the subsurface flow wetland 72 is introduced into the stabilization pond 9 by the seepage drainage pipe arranged at the bottom of the third filler layer of the subsurface flow wetland.
Wherein, can set up multistage constructed wetland according to the pollution concentration of sewage. In one example of the invention, the artificial wetland system at least comprises two stages of step-shaped artificial wetlands, wherein each stage of artificial wetland comprises a surface flow wetland and a subsurface flow wetland; the surface flow wetland of the first stage of artificial wetland is connected with the water distribution channel and used for introducing the sewage regulated by the regulating reservoir into the multistage artificial wetland, and the subsurface flow wetland of the last stage of artificial wetland is connected with the stabilization pond and used for discharging the sewage filtered by the multistage artificial wetland into the stabilization pond. It should be noted that a water outlet is arranged at the bottom of the third packing layer of the subsurface flow wetland of the last stage of artificial wetland (the position of the water outlet can be-1.0 m from the bottom of the third packing layer of the subsurface flow wetland), wherein a seepage drainage pipe at the bottom of the third packing layer of the subsurface flow wetland of the last stage of artificial wetland needs to be connected with the water outlet of the artificial wetland, and sewage filtered by the artificial wetland is discharged into the stabilization pond through the water outlet.
In addition, the surface flow layers of the surface flow wetland 71 and the subsurface flow wetland 72 are both planted with water purification plants; when the first packing layer, the second packing layer and the third packing layer of the surface flow wetland and the subsurface flow wetland are packed, the matching of the packing particle sizes of the packing filled in each layer needs to be noticed so as to avoid blocking the flow of the water body. In one example of the invention, the fillers of the first filler layers of the surface flow wetland 71 and the subsurface flow wetland 72 are blast furnace slag with the particle size of 6mm-10mm, the fillers of the second filler layers of the surface flow wetland and the subsurface flow wetland are crushed stone with the particle size of 10mm-20mm, and the fillers of the third filler layers of the surface flow wetland and the subsurface flow wetland are zeolite with the particle size of 20mm-30 mm.
In addition, a perforated plate is arranged above one end of the subsurface flow wetland close to the surface flow wetland to form a water drop platform, and the width of the perforated plate is equal to that of the subsurface flow wetland. The drop platform can increase the contact area of water flow and air, and the drop platform can be used for sufficient oxygenation through free drop, which is beneficial to removing COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand) and most of difficultly-degradable pollutants in sewage.
In one example of the invention, the water purifying plants planted on the surface flow layer of the surface flow wetland and the subsurface flow wetland can be any combination of more than two of reed, allium mongolicum regel, cattail, canna and wild rice stem, and the planting density is 6 plants/m2。
The sewage filtered by the artificial wetland is discharged into the stabilization pond through the water outlet of the subsurface flow wetland of the last stage of artificial wetland, the sewage filtered by the subsurface flow wetland is further purified in the stabilization pond 9, and the sewage purified by the stabilization pond is discharged into a downstream river channel through a water collecting well.
In one example of the invention, the depth of the stabilization pond is 1.2m to 2.0m, the thickness of the sludge in the stabilization pond is 0.3m, and the ecosystem of the stabilization pond is constructed by planting emergent aquatic plants, floating plants and cultivating ornamental fishes in the stabilization pond. Specifically, reed can be planted near the water inlet of the stabilization pond, water lily can be planted in the pond, windmill grass can be planted around the pond, silver carp, goldfish and red carp are cultured in the pond in a mixed mode, and the density is 8-10 fish/m2And putting a certain amount of river snails into the stabilization pond so as to construct a stabilization pond ecosystem.
And discharging the sewage further purified by the stabilization pond into a downstream river channel through a water collecting well. Wherein, fig. 3 shows a sump structure of an ecological purification system for river regulation according to an embodiment of the present invention.
As shown in fig. 3, a water collecting tank 13 which is concave downwards is arranged at the bottom of the water collecting well, a lifting pump 14 is arranged in the water collecting tank 13, and water entering the water collecting well is discharged into a downstream river channel through the lifting pump 14.
According to the method, after sewage enters the ecological purification system for river regulation, firstly suspended matters or floating matters with larger particle sizes in the sewage are intercepted and removed by the grid pond, and then the sewage enters the regulating pond for homogenizing and uniform regulation; the sewage adjusted by the adjusting tank enters a water distribution channel and then is further filtered by the stepped multi-stage artificial wetlands in sequence. In the anaerobic and anoxic environments of the stepped multistage artificial wetland, the anoxic and anaerobic microorganisms loaded on the surface of the wetland pool substrate remove organic matters through the anaerobic respiration; denitrifying bacteria in the wetland degrade nitrogen through denitrification, and the wetland matrix adsorbs and precipitates phosphorus and solid suspended matters in the sewage; the dissolved oxygen in the sewage is increased through the drop aeration of the multi-stage artificial wetland, which is beneficial to removing COD, BOD and most of pollutants difficult to degrade in the sewage; then, the sewage enters a stabilization pond, residual COD, BOD and phosphorus in the sewage are removed in the stabilization pond, and the sewage purified by the stabilization pond is discharged into a downstream river channel through a water collecting well. The ecological purification system for river regulation provided by the invention has the advantages of low cost, high sewage treatment efficiency and capability of beautifying the environment.
The ecological purification system for river regulation according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the ecological purification system for river regulation of the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. An ecological purification system for river regulation comprises a grid pond, an adjusting pond, a water distribution channel, an artificial wetland, a stabilization pond and a water collection well which are sequentially communicated; wherein,
the sewage of the upstream river channel enters the regulating tank for regulation after being primarily filtered by the grid tank, and the sewage regulated by the regulating tank enters the water distribution channel;
a triangular weir is arranged in the water distribution channel, and the regulated sewage is introduced into the artificial wetland through the triangular weir;
the artificial wetland comprises a surface flow wetland and an undercurrent wetland which are in a step shape; wherein,
the surface flow wetland and the subsurface flow wetland are connected through a reclaimed water collecting and distributing device;
surface flow layers, a first packing layer, a second packing layer and a third packing layer are sequentially arranged in the surface flow wetland and the subsurface flow wetland from top to bottom, water pipes are uniformly distributed on the surface flow layers of the surface flow wetland and the subsurface flow wetland, and seepage drainage pipes are arranged at the bottoms of the third packing layers of the surface flow wetland and the subsurface flow wetland; wherein,
the seepage drainage pipe arranged at the bottom of the third filler layer of the surface flow wetland is connected with the reclaimed water collecting and distributing device, the regulated sewage is introduced into the surface flow wetland, the introduced sewage is uniformly distributed through the water pipes arranged on the surface flow layer of the surface flow wetland, the introduced sewage is filtered by the first filler layer, the second filler layer and the third filler layer of the surface flow wetland in sequence, and the filtered sewage is introduced into the subsurface flow wetland through the seepage drainage pipe arranged at the bottom of the third filler layer of the surface flow wetland and the reclaimed water collecting and distributing device;
uniformly distributing water to the sewage filtered by the surface flow wetland through a water pipe distributed on the surface flow layer of the subsurface flow wetland, filtering the introduced sewage filtered by the surface flow wetland through a first filler layer, a second filler layer and a third filler layer of the subsurface flow wetland in sequence, and introducing the sewage filtered by the subsurface flow wetland into the stabilization pond through a seepage drainage pipe arranged at the bottom of the third filler layer of the subsurface flow wetland;
and purifying the sewage filtered by the subsurface flow wetland in the stabilization pond, and discharging the sewage purified by the stabilization pond into a downstream river channel through the water collecting well.
2. The ecological purification system for river regulation of claim 1, wherein,
the artificial wetland system at least comprises two stages of step-shaped artificial wetlands, wherein each stage of artificial wetland comprises a surface flow wetland and an undercurrent wetland; wherein,
the surface flow wetland of the first stage of artificial wetland is connected with the water distribution channel, and the subsurface flow wetland of the last stage of artificial wetland is connected with the stabilization pond.
3. The ecological purification system for river regulation of claim 1, wherein,
the areas of the grid pond, the adjusting pond, the artificial wetland and the stabilizing pond are as follows: 1: 1: 1, setting;
and water-isolating dams are respectively arranged among the grid pond, the regulating pond, the artificial wetland and the stabilizing pond, and a natural fall of 0.1m is sequentially formed among the water-isolating dams.
4. The ecological purification system for river regulation of claim 1, wherein,
the grating is obliquely arranged in the grating tank, and the inclination angle of the grating is 45-75 degrees;
a water inlet is formed in one side of the grid pond, a water outlet is formed in the other side of the grid pond, sewage of an upstream river channel enters the grid pond through the water inlet of the grid pond, and is discharged into the regulating pond through the water outlet of the grid pond after being primarily filtered by the grid; wherein,
the horizontal height of the water inlet of the grating tank is higher than that of the water outlet of the grating tank.
5. The ecological purification system for river regulation of claim 1, wherein,
a water inlet is formed in one side of the regulating tank, a water outlet is formed in the other side of the regulating tank, sewage primarily filtered by the grating tank enters the regulating tank from the water inlet, and enters the water distribution channel from the water outlet of the regulating tank after being homogenized and uniformly regulated by the regulating tank;
the adjusting tank consists of a tank body, a transverse partition wall and a longitudinal partition wall; wherein,
the longitudinal partition walls are respectively and vertically arranged at the upper side and the lower side of the tank body, and the longitudinal partition walls vertical to the upper side and the longitudinal partition walls vertical to the lower side are arranged at intervals;
the transverse partition walls are respectively vertically arranged on the left side of the adjusting tank and the side of the longitudinal partition wall, and the transverse partition walls perpendicular to the left side of the adjusting tank and the transverse partition walls perpendicular to the longitudinal partition walls are arranged at intervals.
6. The ecological purification system for river regulation of claim 5, wherein,
the number of the longitudinal partition walls is 3-6, and the number of the transverse partition walls is 2-5.
7. The ecological purification system for river regulation of claim 1, wherein,
water purification plants are planted on the surface flow layers of the surface flow wetland and the subsurface flow wetland;
the fillers of the first filler layers of the surface flow wetland and the subsurface flow wetland are blast furnace slag with the particle size of 6mm-10mm, the fillers of the second filler layers of the surface flow wetland and the subsurface flow wetland are crushed stone with the particle size of 10mm-20mm, and the fillers of the third filler layers of the surface flow wetland and the subsurface flow wetland are zeolite with the particle size of 20mm-30 mm.
8. The ecological purification system for river regulation of claim 1, wherein,
and a perforated plate is arranged above one end of the subsurface flow wetland close to the surface flow wetland to form a water drop platform, and the width of the perforated plate is equal to that of the subsurface flow wetland.
9. The ecological decontamination system for river remediation of claim 1, wherein
The depth of the stabilization pond is 1.2m-2.0m, the thickness of sludge in the stabilization pond is 0.3m, and an ecological system of the stabilization pond is constructed by planting emergent aquatic plants, floating plants and cultivating ornamental fishes in the stabilization pond.
10. The ecological purification system for river regulation of claim 1, wherein,
the water collecting well is characterized in that a water collecting tank which is sunken downwards is arranged at the bottom of the water collecting well, a lifting pump is arranged in the water collecting tank, and water entering the water collecting well is discharged into a downstream river channel through the lifting pump.
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| CN109928573A (en) * | 2019-02-27 | 2019-06-25 | 长安大学 | A kind of black-odor riverway sunk type greenery patches processing system and its processing method |
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| CN111018266A (en) * | 2019-12-31 | 2020-04-17 | 华南理工大学 | Landscape type modularized biological carbon multistage artificial wetland automatic treatment system |
| CN111573979A (en) * | 2020-05-22 | 2020-08-25 | 金文贤 | Sewage treatment and recycling method |
| CN111960539A (en) * | 2020-09-16 | 2020-11-20 | 张亮 | Kinetic energy-free intermittent vertical flow type wetland purification system |
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