CN109133378B - Composite constructed wetland system - Google Patents
Composite constructed wetland system Download PDFInfo
- Publication number
- CN109133378B CN109133378B CN201811158838.8A CN201811158838A CN109133378B CN 109133378 B CN109133378 B CN 109133378B CN 201811158838 A CN201811158838 A CN 201811158838A CN 109133378 B CN109133378 B CN 109133378B
- Authority
- CN
- China
- Prior art keywords
- layer
- constructed wetland
- organic filler
- gravel
- ventilation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000012766 organic filler Substances 0.000 claims abstract description 71
- 238000009423 ventilation Methods 0.000 claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 239000010865 sewage Substances 0.000 claims abstract description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000006004 Quartz sand Substances 0.000 claims abstract description 13
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 4
- -1 Polypropylene Polymers 0.000 claims description 4
- 239000006247 magnetic powder Substances 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 229910000077 silane Inorganic materials 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims 2
- 239000000945 filler Substances 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 244000005700 microbiome Species 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 238000005273 aeration Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008827 biological function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229940057995 liquid paraffin Drugs 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a composite constructed wetland system, which comprises a horizontal subsurface flow organic filler constructed wetland unit and a vertical subsurface flow constructed wetland unit which are sequentially arranged along the water flow direction, wherein the horizontal subsurface flow organic filler constructed wetland unit comprises a drop well, a first gravel layer, a second gravel layer, an organic filler layer, a permeable concrete plate, a non-woven fabric layer, a quartz sand layer, aquatic plants, a water inlet, a water outlet water collecting well, a water outlet and a ventilation mechanism, the organic filler layer is composed of a honeycomb mechanism filled with magnetic organic fillers, a fixed plate is arranged at the bottom of the honeycomb mechanism, and the vertical subsurface flow constructed wetland unit comprises a fourth gravel layer, a ceramsite layer, a third gravel layer and a planting layer which are sequentially arranged from bottom to top. The composite constructed wetland system provided by the invention effectively solves the problem of constructed wetland blockage, and can effectively purify high-load sewage.
Description
Technical Field
The invention relates to the field of artificial wetland, in particular to a composite artificial wetland system, and especially relates to a composite artificial wetland system capable of effectively removing organic matters, nitrogen and phosphorus pollutants in sewage under the condition of higher pollution load.
Background
The sewage treatment technology of the constructed wetland system is a sewage treatment technology which has the characteristics of low investment and construction cost, low operation technology, low energy consumption, certain biological safety of effluent, remarkable ecological environmental benefit, environment beautification, capability of realizing the recycling of wastewater and the like and is proposed in 1970 internationally. The constructed wetland is a typical ecological sewage treatment technology for decades, and is widely focused and applied in a plurality of countries at home and abroad at present, but the further popularization and application of the constructed wetland are limited by the problems of easy blockage, low treatment load and the like.
The constructed wetland has a unique and complex purification mechanism, and can realize the efficient purification of sewage by utilizing the triple coordination of physical, chemical and biological functions of a matrix-microorganism-plant composite ecological system through filtration, adsorption, coprecipitation, ion exchange, plant absorption and microorganism decomposition. The matrix filler is the most important component part of the constructed wetland and is also the main part of the constructed wetland where the blockage occurs, and the filler which has long service life and is easy to clean and replace is selected to effectively slow down the blockage condition of the constructed wetland. Common artificial wetland matrix fillers are inorganic fillers such as gravels, volcanic rocks, ceramsites, zeolite and modified materials thereof, the materials have high density, the materials are paved in the wetland, sewage permeates layer by layer through gaps among the fillers, and microorganisms attached to the fillers degrade pollutants in the sewage in the process, so that the aim of removing the pollutants is fulfilled.
However, as the running time increases, the substrate is blocked due to overlarge water inlet load and the like, sewage cannot permeate through the gaps, so that sewage is deposited, and the wetland often loses the original water purifying function.
Disclosure of Invention
The invention aims at solving the problems of easy blockage of an artificial wetland, low sewage treatment load and the like, and provides a composite artificial wetland system consisting of a horizontal subsurface flow organic filler artificial wetland unit and a vertical subsurface flow artificial wetland unit so as to improve the effect of treating organic matters, nitrogen and phosphorus pollutants of the wetland.
In order to achieve the above purpose, the invention provides a composite constructed wetland system, which comprises a horizontal subsurface flow organic filler constructed wetland unit and a vertical subsurface flow constructed wetland unit which are sequentially arranged along the water flow direction, wherein the horizontal subsurface flow organic filler constructed wetland unit comprises a drop well, a first gravel layer paved at the lower part in the drop well, a second gravel layer paved at the bottom of the horizontal subsurface flow organic filler constructed wetland unit, an organic filler layer paved on the second gravel layer, a permeable concrete plate paved on the organic filler layer, a non-woven fabric layer paved on the permeable concrete plate, a quartz sand layer paved on the non-woven fabric layer, aquatic plants planted in the quartz sand layer, a water inlet arranged at the bottom, a water outlet arranged opposite to the drop well, a water outlet arranged at the upper part of the water outlet collecting well and a ventilation mechanism, the organic filler layer is composed of a honeycomb mechanism filled with magnetic organic filler, a fixed plate is arranged at the bottom of the honeycomb mechanism, the vertical subsurface flow constructed wetland unit comprises a fourth gravel layer, a third gravel layer and a third plant layer which are sequentially arranged from bottom to top, and a water outlet is arranged in the planting layer.
Preferably, the depth of the drop well is 1 m-1.3 m, and a grid or a sewage interception hanging basket is arranged above the drop well; the paving thickness of the first gravel layer is 50-60 cm, and the grain size is 20-30 mm; the laying thickness of the second gravel layer is 10-20 cm, and the grain size is 20-30 mm.
Preferably, the addition amount of the magnetic organic filler accounts for 30-40% of the total volume of the gaps of the honeycomb mechanism, the magnetic organic filler comprises an upper hollow reticular gyroscopic structure, a lower hollow reticular gyroscopic structure and hollow cylinders arranged at the bottom of the hollow reticular gyroscopic structure, circular rings are uniformly arranged around the upper hollow cylinder and the lower hollow cylinder, the circular rings on the upper hollow cylinder and the lower hollow cylinder are connected through buckles, and polyurethane sponge is filled in the hollow cylinders.
Preferably, the preparation step of the magnetic organic filler comprises:
A. Polypropylene polymer particles with the mass ratio of 80-90% are put into a stirrer, and waste rubber tire powder with the mass ratio of 5-10%, starch with the mass ratio of 1-2%, diatomite with the mass ratio of 1-2% and magnetic powder with the mass ratio of 3-6% are sequentially added to obtain a mixture A;
B. the mass ratio of the mixture A to the dispersing agent is (98-99.5): (0.5-2) uniformly mixing to obtain a mixture B;
C. The mass ratio of the mixture B to the silane coupling lubricant is (98-99.5): mixing the materials according to the proportion of (0.5-2), putting the mixture into an injection molding machine for injection molding, and magnetizing the injection molded materials;
D. The method comprises the steps of fixing sludge acclimation bacteria in an aerobic tank in a sewage treatment plant on polyurethane sponge, loading the polyurethane sponge into hollow cylinders, and connecting rings on an upper hollow cylinder and a lower hollow cylinder through buckles to obtain the magnetic organic filler.
Preferably, the honeycomb mechanism is composed of a plurality of regular hexagonal cylinder honeycomb lattices, the cylinder honeycomb lattices are divided into an upper cylinder and a lower cylinder with the same height, the inside of the cylinder honeycomb lattices is hollow, a rotating shaft is arranged in the hollow of the cylinder honeycomb lattices, the rotating shaft is composed of a solid rotating rod in the middle and a hollow shaft outside, two rotating plates which are symmetrically distributed are arranged on the hollow shaft, and circular holes are uniformly formed in the hollow shaft and the rotating plates.
Preferably, the side length of the regular hexagon is 11.5cm, the height of the cylinder honeycomb lattice is 70-80 cm, the frame of the cylinder honeycomb lattice is a metal lattice, the opening of the metal lattice is a diamond or square with the side length of 5mm, the length of a single rotating plate is 7-8 cm, and the height is 25-30 cm; the diameter of the circular opening is 10mm.
Preferably, the ventilation mechanism is composed of a ventilation main pipe and a ventilation branch pipe, the ventilation main pipe comprises a vertical pipe arranged in the drop well and a horizontal pipe arranged in the second gravel layer, the upper end of the vertical pipe is an air inlet, the height of the opening position of the upper end of the vertical pipe is higher than the height of a quartz sand layer, the ventilation branch pipe is uniformly arranged on the horizontal pipe, the ventilation branch pipe is connected with a part of rotating shafts, and an air outlet is formed in the permeable concrete slab.
Preferably, the horizontal pipes are uniformly distributed in the second gravel layer in a 3 shape, and air is conveyed from the air inlet to the hollow shaft of the rotating shaft through the ventilation main pipe and the ventilation branch pipe and is dispersed into the organic filler layer through the openings arranged on the hollow shaft.
Preferably, gravel with the particle size of 20-30 mm is filled in the water outlet collecting well, the inner side wall of the water outlet collecting well is a perforated wall, and water enters the water outlet collecting well through the perforated wall and is discharged from the water outlet after being uniformly distributed through the gravel.
Preferably, the thickness of the fourth gravel layer is 20-30 cm, and the particle size of the gravel is 20-30 mm; the thickness of the ceramsite layer is 150-160 cm, and the particle size of the ceramsite is 5-10 mm; the thickness of the third gravel layer is 20-30 cm, and the particle size of the gravel is 15-25 mm; the thickness of the planting layer is 5-10 cm, and the planting layer is paved by planting soil; the vertical downward subsurface flow constructed wetland unit further comprises a ventilation and dosing pipe which is vertically arranged, and the bottom end of the ventilation and dosing pipe is arranged in the haydite layer.
Based on the technical scheme, the invention has the advantages that:
the composite constructed wetland system provided by the invention is composed of the horizontal subsurface flow organic filler constructed wetland unit and the vertical subsurface flow constructed wetland unit, effectively solves the problem of constructed wetland blockage, and can effectively purify high-load sewage.
The horizontal subsurface flow organic filler wetland unit is filled with the special biological affinity magnetic organic filler, so that the horizontal subsurface flow organic filler wetland unit not only has good adsorptivity to nitrogen and phosphorus pollutants, but also enriches the organic pollutants and oxygen on the surface of the filler under the action of a weak magnetic field, and the degradation and removal effects of microorganisms on the surface of the filler on the pollutants are effectively improved under the intermittent aeration condition; the filler can be uniformly dispersed in the wetland and can flow relatively freely, so that the problems of accumulated water and reduced purifying capacity of the wetland caused by the blockage of matrix pores are solved. Through the combined action of the two, the composite wetland system can still operate well even under the condition of higher pollution load, sewage is effectively purified, and the effluent quality is good.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a composite constructed wetland system;
FIG. 2 is a schematic diagram of a magnetic organic filler structure;
FIG. 3 is a schematic top view of a magnetic organic filler;
FIG. 4 is a schematic diagram of a honeycomb structure;
Fig. 5 is a schematic diagram of a venting mechanism layout.
Detailed Description
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
The invention provides a composite constructed wetland system, as shown in figures 1-5, wherein a preferred embodiment of the invention is shown. The invention sequentially comprises a horizontal subsurface flow organic filler constructed wetland unit and a vertical downward subsurface flow constructed wetland unit according to the water flow direction, and a flocculation sedimentation tank is arranged in front of the horizontal subsurface flow organic filler constructed wetland unit according to the sewage quality condition so as to ensure good operation effect of the wetland.
Specifically, the composite constructed wetland system comprises a horizontal subsurface flow organic filler constructed wetland unit and a vertical subsurface flow constructed wetland unit which are sequentially arranged along the water flow direction, wherein the horizontal subsurface flow organic filler constructed wetland unit comprises a drop well 4, a first gravel layer 2 paved at the inner lower part of the drop well 4, a second gravel layer 19 paved at the bottom of the horizontal subsurface flow organic filler constructed wetland unit, an organic filler layer 13 paved on the second gravel layer 19, a permeable concrete plate 9 paved on the organic filler layer 13, a non-woven fabric layer 8 paved on the permeable concrete plate 9, a quartz sand layer 7 paved on the non-woven fabric layer 8, aquatic plants 6 planted in the quartz sand layer 7, a water inlet 1 arranged at the bottom, a water outlet 14 arranged at the upper part of the water outlet water collecting well 20 and a ventilation mechanism, the organic filler layer 13 is composed of a honeycomb mechanism 16 filled with magnetic organic filler, a fixed plate 18 is arranged at the bottom of the honeycomb mechanism 16, the vertical subsurface flow constructed wetland unit comprises a planting stone layer 26, a third gravel layer 24 and a fourth gravel layer 24, and a fourth gravel layer 24 sequentially arranged in the planting layer 24.
As shown in fig. 1, the horizontal subsurface flow organic filler constructed wetland unit is a core part of the present invention, and comprises a drop well 4, a second gravel layer 19, an organic filler layer 13, a permeable concrete slab 9, a quartz sand layer 7, an effluent water collecting well 20, a ventilation mechanism, and the like. The aspect ratio of the wetland is about 3:1, and the height is 1 m-1.3 m. The water inlet 1 is arranged below the drop well 4, the joint of the first gravel layer 2 and the organic filler layer 13, a perforated flower wall 15 is arranged between the water outlet collecting well 20 and the organic filler layer 13, and the water outlet 14 is arranged above the water outlet collecting well 20.
The sewage firstly enters the drop well 4, preferably, the depth of the drop well 4 is 1 m-1.3 m, and a grid or a sewage interception hanging basket is arranged above the drop well 4 so as to intercept garbage, fallen leaves, aquatic plants and the like. And gravel with the diameter of 20-30 mm is paved below the drop well 4, namely the first gravel layer 2. The drop well 4 has the functions of drop aeration and energy dissipation, can be used for carrying out preliminary filtration on sewage, entraps some large-particle suspended matters, and simultaneously has the function of uniformly distributing water for the rear horizontal subsurface wetland, and the first gravel layer 2 needs to be cleaned regularly to ensure smooth water inflow.
The second gravel layer 19 is formed by paving 10-20 cm thick gravels at the lowest part of the horizontal subsurface wetland, the grain size of the gravels is 20-30 mm, and a ventilation main pipe is further arranged in the second gravel layer 19, and the gravels mainly play a role in fixing the ventilation main pipe 17.
Further, the organic filler layer 13 is formed of a honeycomb mechanism 16 filled with a magnetic organic filler, and the filler is uniformly dispersed and filled in the honeycomb system. Preferably, the magnetic organic filler is added in an amount of 30-40% of the total volume of voids of the honeycomb mechanism 16.
As shown in fig. 2 and 3, the magnetic organic filler is composed of an upper hollow reticular gyroscopic structure 27, a lower hollow reticular gyroscopic structure 27 and a hollow cylinder 28 arranged at the bottom of the hollow reticular gyroscopic structure 27, wherein circular rings 29 are uniformly arranged around the upper hollow cylinder 28 and the lower hollow cylinder 28, the circular rings 29 on the upper hollow cylinder 28 and the lower hollow cylinder 28 are connected through a buckle, and polyurethane sponge is filled in the hollow cylinder 28. The hollow cylinder 28 has a bottom surface with a diameter of 15mm and a height of 3.5mm, and the circular bottom surface of the hollow net-shaped gyro structure 27 is connected with the bottom surface of the hollow cylinder 28, and the gyro has a height of about 15mm.
Preferably, the preparation step of the magnetic organic filler comprises:
A. Polypropylene polymer particles with the mass ratio of 80-90% are put into a stirrer, and waste rubber tire powder with the mass ratio of 5-10%, starch with the mass ratio of 1-2%, diatomite with the mass ratio of 1-2% and magnetic powder with the mass ratio of 3-6% are sequentially added to obtain a mixture A;
B. The mass ratio of the mixture A to the dispersing agent (such as liquid paraffin) is (98-99.5): (0.5-2) uniformly mixing to obtain a mixture B;
C. The mass ratio of the mixture B to the silane coupling lubricant (such as KH-570 silane coupling agent) is (98-99.5): mixing the materials according to the proportion of (0.5-2), putting the mixture into an injection molding machine for injection molding, and magnetizing the injection molded materials;
D. The sludge acclimation bacteria in the aerobic tank of the sewage treatment plant are fixed on polyurethane sponge, are filled into the hollow cylinders 28, and the rings 29 on the upper hollow cylinder 28 and the lower hollow cylinder 28 are connected through buckles to obtain the magnetic organic filler. The magnetic organic filler has a specific gravity of about 1. Wherein, the waste rubber tire powder is rubber particles produced by normal temperature crushing, the shape is irregular, the surface is rough, the specific surface area is large, and the particle size is 0.5-1 mm.
Preferably, the hollow cylinder 28 is filled with polyurethane sponge, and has an opening ratio of 97% or more, excellent air permeability, flexibility and mechanical strength, and strong water resistance and drainage. The sludge acclimatization bacteria in the aerobic tank of the sewage treatment plant are fixed on the sponge and are filled into the hollow cylinder 28 to become a good biological carrier.
The magnetic organic filler has the advantages of being porous, strong in adsorptivity, resistant to scouring, nontoxic, easy to form a film by microorganisms, good in hydrophilicity and hydrophilicity, and the like. The filler modified by the waste rubber tire powder has good nitrogen and phosphorus adsorption effect, and promotes the removal of pollutants by microorganisms on the surface of the filler; the magnetic powder is added and the filler subjected to magnetization is provided with a weak magnetic field inside and outside, so that benign growth metabolism of flora can be promoted on one hand, and organic pollutants and oxygen can be enriched on the surface of the filler under the action of the weak magnetic field on the other hand, thereby further promoting the removal of the pollutants by microorganisms on the surface of the filler. Under the combined action of the two, the water purifying effect of the constructed wetland is greatly improved. The specific gravity of the organic filler is about 1, and the organic filler can move up and down and back and forth along with water flow in water, and can effectively prevent wetland blockage compared with inorganic fillers stacked layer by layer.
As shown in fig. 4, the honeycomb mechanism 16 is composed of a plurality of regular hexagonal cylindrical honeycomb lattices, the cylindrical honeycomb lattices are divided into an upper cylinder and a lower cylinder with the same height, the interior of the cylindrical honeycomb lattice is hollow, a rotating shaft 11 is arranged in the hollow of the cylindrical honeycomb lattice, the rotating shaft 11 is composed of a solid rotating rod in the middle and a hollow shaft outside, two rotating plates 12 which are symmetrically distributed are arranged on the hollow shaft, and openings are uniformly arranged on the hollow shaft and the rotating plates 12.
Preferably, the side length of the regular hexagon is 11.5cm, the height of the column honeycomb lattice is 70-80 cm, the frame of the column honeycomb lattice is a corrosion-resistant, scouring-resistant and high-mechanical-strength metal lattice, the opening of the metal lattice is a diamond or square with the side length of 5mm, the length of the single rotary plate 12 is 7-8 cm, and the height of the single rotary plate is 25-30 cm, so that the column honeycomb lattice is a corrosion-resistant light plastic plate; the diameter of the circular opening is 10mm. The bottom of the honeycomb mechanism 16 is provided with a fixing plate 18, and the fixing plate 18 is provided with a grid for embedding a column honeycomb lattice so as to be convenient for fixing.
The water permeable concrete plate 9 is positioned above the organic filler layer 13, the thickness is 5-10 cm, the plate has a certain bearing capacity, the water permeable concrete plate 9 is provided with an air outlet 10, and certain plant planting holes and holes for the ventilation pipe to be inserted are uniformly formed in the plate, and the ventilation pipe inserting hole is the air outlet 10. The quartz sand layer 7 is paved above the permeable concrete plate 9 by about 5-10 cm, and 1-2 non-woven fabric layers 8 can be paved between the two layers, so that the quartz sand is prevented from falling into the openings of the permeable concrete plate 9 and then falling into the lower organic filler layer 13. Aquatic plants 6 with developed root systems are planted in the quartz sand layer 7, and the plants are planted at the openings of the permeable concrete plate 9 so as to enable the root systems of the aquatic plants to penetrate into the lower layer.
As shown in fig. 5, the ventilation mechanism is composed of a ventilation main pipe 17 and a ventilation branch pipe 3, wherein the ventilation main pipe 17 comprises a vertical pipe arranged in the drop well 4 and a horizontal pipe arranged in the second gravel layer 19. Wherein the vertical pipe is arranged in the drop well 4, and the height of the vertical pipe is required to be higher than that of the quartz sand layer 7 of the horizontal subsurface flow wetland. The upper end of the vertical pipe is provided with an air inlet 5, the horizontal pipe is also uniformly provided with ventilation branch pipes 3, and the ventilation branch pipes 3 are connected with a part of rotating shafts 11.
Preferably, the horizontal pipes are uniformly distributed in the second gravel layer 19 in a shape of a 3, and air is conveyed from the air inlet 5 to the hollow shaft of the rotating shaft 11 through the ventilation main pipe 17 and the ventilation branch pipe 3, and is dispersed into the organic filler layer 13 through the openings arranged on the hollow shaft.
The water outlet water collecting well 20 is positioned at the rearmost position of the horizontal subsurface flow wetland, gravel with the particle size of 20-30 mm is filled in the water outlet water collecting well 20, the inner side wall of the water outlet water collecting well 20 is provided with a perforated flower wall 15, and water enters the water outlet water collecting well 20 through the perforated flower wall 15 and is discharged from the water outlet 14 after being uniformly distributed through the gravel.
The sewage enters the horizontal subsurface flow organic filler constructed wetland unit from the water inlet at the lower part of the front part, finally flows out from the perforated flower wall at the upper part of the rear part and enters the water collecting well. In the process, the organic filler in the honeycomb mechanism flows along with water flow from front to back, but cannot flow out along with the water flow due to the constraint of the honeycomb system, the filler can freely move in the water due to the specific gravity of the organic filler being about 1, and in addition, the rotating plate can slowly rotate under the action of the water flow to drive the filler to move, so that the organic filler is more uniformly dispersed in the honeycomb mechanism, and the wetland is not blocked. The aeration system is used for carrying out intermittent aeration on the wetland unit, so that the capability of oxidizing organic matters and ammonia nitrogen by microorganisms is effectively improved, and the wetland unit can still operate well even under the condition of higher pollution load.
The vertical downward subsurface flow constructed wetland unit is used for water inflow from one side above, uniformly distributing water through a water distribution pipe and discharging water from the other side below, wherein the total height is 2-2.3 m, and the length-width ratio is about 1:1. As shown in fig. 1, the vertical downward subsurface flow constructed wetland unit comprises a fourth gravel layer 26, a ceramsite layer 25, a third gravel layer 24 and a planting layer 23 which are sequentially arranged from bottom to top, aquatic plants 6 are planted in the planting layer 23, and a water distribution pipe 21 connected with the water outlet 14 is arranged in the third gravel layer 24.
Preferably, the thickness of the fourth gravel layer 26 is 20-30 cm, and the gravel particle size is 20-30 mm; the thickness of the ceramsite layer 25 is 150-160 cm, and the particle size of the ceramsite is 5-10 mm; the thickness of the third gravel layer 24 is 20-30 cm, and the particle size of the gravels is 15-25 mm; the thickness of the planting layer 23 is 5-10 cm, and the planting layer is paved by planting soil; the vertical downward subsurface flow constructed wetland unit also comprises a ventilation and dosing pipe 22 which is vertically arranged, and the bottom end of the ventilation and dosing pipe 22 is arranged in the ceramsite layer 25.
The organic matters and ammonia nitrogen are fully removed by the front horizontal subsurface flow organic filler constructed wetland unit, the main body of the vertical subsurface flow constructed wetland is a lower anaerobic layer (namely a ceramsite layer), and aquatic plants with shallower root systems can be planted in the vertical subsurface flow constructed wetland. Because the front organic matters are consumed and removed in a large amount, a proper amount of organic carbon source is added into the wetland through the ventilation and dosing pipe so as to ensure that the anaerobic layer part of the wetland can perform denitrification better.
Furthermore, the invention can be used for further enhancing the sewage treatment effect by connecting a plurality of groups of wetlands in series according to the water quality of the water entering and exiting the wetlands.
The composite constructed wetland system provided by the invention is composed of the horizontal subsurface flow organic filler constructed wetland unit and the vertical subsurface flow constructed wetland unit, effectively solves the problem of constructed wetland blockage, and can effectively purify high-load sewage.
The horizontal subsurface flow organic filler wetland unit is filled with the special biological affinity magnetic organic filler, so that the horizontal subsurface flow organic filler wetland unit not only has good adsorptivity to nitrogen and phosphorus pollutants, but also enriches the organic pollutants and oxygen on the surface of the filler under the action of a weak magnetic field, and the degradation and removal effects of microorganisms on the surface of the filler on the pollutants are effectively improved under the intermittent aeration condition; the filler can be uniformly dispersed in the wetland and can flow relatively freely, so that the problems of accumulated water and reduced purifying capacity of the wetland caused by the blockage of matrix pores are solved. Through the combined action of the two, the composite wetland system can still operate well even under the condition of higher pollution load, sewage is effectively purified, and the effluent quality is good.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (8)
1. A composite constructed wetland system, which is characterized in that: the device comprises a horizontal subsurface flow organic filler constructed wetland unit and a vertical subsurface flow constructed wetland unit which are sequentially arranged along the water flow direction, wherein the horizontal subsurface flow organic filler constructed wetland unit comprises a drop well (4), a first gravel layer (2) which is paved at the lower part in the drop well (4), a second gravel layer (19) which is paved at the bottom of the horizontal subsurface flow organic filler constructed wetland unit, an organic filler layer (13) which is paved on the second gravel layer (19), a permeable concrete plate (9) which is paved on the organic filler layer (13), a non-woven fabric layer (8) which is paved on the permeable concrete plate (9), a quartz sand layer (7) which is paved on the non-woven fabric layer (8), aquatic plants (6) planted in the quartz sand layer (7), a water inlet (1) which is arranged at the bottom, a water outlet (20) which is arranged opposite to the drop well (4), a water outlet (14) which is arranged at the upper part of the water outlet (20) and a mechanism, wherein the organic filler layer (13) is formed by a honeycomb mechanism (16) which is filled with a magnetic organic filler, a vertical honeycomb layer (16), a third gravel layer (24) and a fourth artificial gravel layer (24) which are sequentially arranged on the bottom of the non-woven fabric layer (8), aquatic plants (6) are planted in the planting layer (23), be equipped with in the third gravel layer (24) with water distribution pipe (21) that delivery port (14) link to each other, the addition of magnetism organic filler accounts for 30 ~ 40% of honeycomb mechanism (16) space total volume, magnetism organic filler is by upper and lower two the same hollow netlike gyro structure (27) and set up hollow cylinder (28) of hollow netlike gyro structure (27) bottom to evenly be equipped with ring (29) around two upper and lower hollow cylinder (28), connect through the buckle between ring (29) on two upper and lower hollow cylinder (28), be equipped with the polyurethane sponge in hollow cylinder (28), honeycomb mechanism (16) are by a plurality of regular hexagon's cylinder honeycomb lattice constitution, the cylinder lattice divide two upper and lower cylinders that highly are the same, the inside cavity of cylinder honeycomb lattice is equipped with rotation axis (11), rotation axis (11) comprise middle solid rotary rod and outside hollow shaft, be equipped with on the hollow shaft and evenly be equipped with on the hollow shaft and the rotor plate (12) and evenly be equipped with circular trompil (12) on the rotor plate.
2. The composite constructed wetland system according to claim 1, wherein: the depth of the drop well (4) is 1-1.3 m, and a grid or a sewage interception hanging basket is arranged above the drop well (4); the paving thickness of the first gravel layer (2) is 50-60 cm, and the grain diameter is 20-30 mm; the laying thickness of the second gravel layer (19) is 10-20 cm, and the grain size is 20-30 mm.
3. The composite constructed wetland system according to claim 1, wherein: the preparation steps of the magnetic organic filler comprise:
A. Polypropylene polymer particles with the mass ratio of 80-90% are put into a stirrer, and waste rubber tire powder with the mass ratio of 5-10%, starch with the mass ratio of 1-2%, diatomite with the mass ratio of 1-2% and magnetic powder with the mass ratio of 3-6% are sequentially added to obtain a mixture A;
B. the mass ratio of the mixture A to the dispersing agent is (98-99.5): (0.5-2) uniformly mixing to obtain a mixture B;
C. The mass ratio of the mixture B to the silane coupling lubricant is (98-99.5): mixing the materials according to the proportion of (0.5-2), putting the mixture into an injection molding machine for injection molding, and magnetizing the injection molded materials;
D. The sludge acclimation bacteria in the aerobic tank of the sewage treatment plant are fixed on polyurethane sponge, are filled into hollow cylinders (28), and are connected with rings (29) on the upper hollow cylinder (28) and the lower hollow cylinder (28) through buckles, so that the magnetic organic filler is obtained.
4. The composite constructed wetland system according to claim 1, wherein: the side length of the regular hexagon is 11.5cm, the height of the cylinder honeycomb lattice is 70-80 cm, the frame of the cylinder honeycomb lattice is a metal lattice, the opening of the metal lattice is a diamond or square with the side length of 5mm, the length of a single rotating plate (12) is 7-8 cm, and the height is 25-30 cm; the diameter of the circular opening is 10mm.
5. The composite constructed wetland system according to claim 1, wherein: the ventilation mechanism comprises a ventilation main pipe (17) and ventilation branch pipes (3), the ventilation main pipe (17) comprises a vertical pipe arranged in the drop well (4) and a horizontal pipe arranged in the second gravel layer (19), the upper end of the vertical pipe is provided with an air inlet (5), the horizontal pipe is also uniformly provided with the ventilation branch pipes (3), the ventilation branch pipes (3) are connected with a part of rotating shafts (11), and an air outlet (10) is formed in a permeable concrete slab (9).
6. The composite constructed wetland system according to claim 5, wherein: the horizontal pipes are uniformly distributed in the second gravel layer (19) in a3 shape, and air is conveyed into the hollow shaft of the rotating shaft (11) from the air inlet (5) through the ventilation main pipe (17) and the ventilation branch pipe (3) and is dispersed into the organic filler layer (13) through openings arranged on the hollow shaft.
7. The composite constructed wetland system according to claim 1, wherein: gravel with the particle size of 20-30 mm is filled in the water outlet collecting well (20), perforated flower walls (15) are arranged on the inner side wall of the water outlet collecting well (20), and water enters the water outlet collecting well (20) through the perforated flower walls (15) and is discharged from the water outlet (14) after being uniformly distributed through the gravel.
8. The composite constructed wetland system according to claim 1, wherein: the thickness of the fourth gravel layer (26) is 20-30 cm, and the particle size of the gravel is 20-30 mm; the thickness of the ceramsite layer (25) is 150-160 cm, and the particle size of the ceramsite is 5-10 mm; the thickness of the third gravel layer (24) is 20-30 cm, and the particle size of the gravel is 15-25 mm; the thickness of the planting layer (23) is 5-10 cm, and the planting layer is paved by planting soil; the vertical downward subsurface flow constructed wetland unit further comprises a ventilation and dosing pipe (22) which is vertically arranged, and the bottom end of the ventilation and dosing pipe (22) is arranged in the ceramsite layer (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158838.8A CN109133378B (en) | 2018-09-30 | 2018-09-30 | Composite constructed wetland system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158838.8A CN109133378B (en) | 2018-09-30 | 2018-09-30 | Composite constructed wetland system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109133378A CN109133378A (en) | 2019-01-04 |
| CN109133378B true CN109133378B (en) | 2024-10-08 |
Family
ID=64814227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811158838.8A Active CN109133378B (en) | 2018-09-30 | 2018-09-30 | Composite constructed wetland system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109133378B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217896A (en) * | 2019-06-12 | 2019-09-10 | 哈尔滨工业大学 | Microorganism embeds high-efficiency artificial wetland sewage treatment facility and technique |
| CN110577334B (en) * | 2019-09-29 | 2021-02-19 | 中国环境科学研究院 | Constructed wetland water environment restoration system and method |
| CN110723808B (en) * | 2019-09-30 | 2022-07-22 | 江苏大学 | A Magnetic Biofilm Reactor Based on Coral Sand |
| CN113845230A (en) * | 2021-10-15 | 2021-12-28 | 北京弘昇达环境科技有限公司 | High-load reoxygenation type ecological subsurface wetland based on high-molecular composite filler |
| CN113968662A (en) * | 2021-11-01 | 2022-01-25 | 安徽雷克环境科技有限公司 | Ecological pond treatment method for tail water treatment of sewage plant |
| CN114920353B (en) * | 2022-06-01 | 2023-04-07 | 镇江市水业总公司 | Peacock feather type biological nest filler reinforced by magnetic field |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844856A (en) * | 2010-05-10 | 2010-09-29 | 山东大学 | Sewage purification system of constructed wetland coupling SBR denitrification and phosphorus removal integration |
| CN105540822A (en) * | 2016-03-07 | 2016-05-04 | 云环净环保科技（上海）有限公司 | Preparation method of magnetic packing |
| CN107500414A (en) * | 2017-10-09 | 2017-12-22 | 合肥市市政设计研究总院有限公司 | Bamboo charcoal compounded mix biology block-resistant type treatment of domestic sewage advanced artificial wet land system |
| CN107777841A (en) * | 2017-11-08 | 2018-03-09 | 浙江海洋大学 | A kind of high pollution source water biological treatment device |
| CN108238701A (en) * | 2018-01-25 | 2018-07-03 | 暨南大学 | The coupling technique of light electrolysis-Pressed bio filtration treatment industrial wastewater biochemical tail water |
| CN208948975U (en) * | 2018-09-30 | 2019-06-07 | 北京东方园林环境股份有限公司 | A kind of composite constructed wetland system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274798B (en) * | 2008-05-16 | 2010-06-02 | 哈尔滨工业大学 | Drinking water source composite constructed wetland system and pretreatment method |
| CN102079579B (en) * | 2009-11-26 | 2013-02-06 | 宝山钢铁股份有限公司 | A combined packing artificial wetland and its technology for advanced treatment of coking wastewater discharged from iron and steel enterprises |
| CN104150595B (en) * | 2014-07-25 | 2016-05-04 | 北京建筑大学 | A kind of overland flow biological treatment system and processing method |
| CN205653233U (en) * | 2016-03-07 | 2016-10-19 | 浙江天韵生态环境工程有限公司 | Undercurrent type constructed wetland |
| CN105600936B (en) * | 2016-03-09 | 2018-05-22 | 沈阳大学 | A kind of waste water soil treatment system of full season operation |
| CN106115928A (en) * | 2016-08-26 | 2016-11-16 | 北京顺景园林有限公司 | A kind of substrate of vertical-flow constructed wetlands structural system |
| CN106745777A (en) * | 2017-01-11 | 2017-05-31 | 深圳市碧园环保技术有限公司 | A kind of artificial wet land system for sewage treatment plant tail water advanced treating |
| CN107840457A (en) * | 2017-11-01 | 2018-03-27 | 同济大学 | A kind of combined type deep layer artificial wet land system and operation method |
-
2018
- 2018-09-30 CN CN201811158838.8A patent/CN109133378B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844856A (en) * | 2010-05-10 | 2010-09-29 | 山东大学 | Sewage purification system of constructed wetland coupling SBR denitrification and phosphorus removal integration |
| CN105540822A (en) * | 2016-03-07 | 2016-05-04 | 云环净环保科技（上海）有限公司 | Preparation method of magnetic packing |
| CN107500414A (en) * | 2017-10-09 | 2017-12-22 | 合肥市市政设计研究总院有限公司 | Bamboo charcoal compounded mix biology block-resistant type treatment of domestic sewage advanced artificial wet land system |
| CN107777841A (en) * | 2017-11-08 | 2018-03-09 | 浙江海洋大学 | A kind of high pollution source water biological treatment device |
| CN108238701A (en) * | 2018-01-25 | 2018-07-03 | 暨南大学 | The coupling technique of light electrolysis-Pressed bio filtration treatment industrial wastewater biochemical tail water |
| CN208948975U (en) * | 2018-09-30 | 2019-06-07 | 北京东方园林环境股份有限公司 | A kind of composite constructed wetland system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109133378A (en) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109133378B (en) | Composite constructed wetland system | |
| US12012711B2 (en) | Ecological slope protection with efficient water purification function and ecological improvment method | |
| CN107445422B (en) | Ecological restoration method for river polluted bottom mud | |
| CN110386727B (en) | Vertical flow-baffling compound reinforced denitrification and dephosphorization anti-blocking ecological filter dam for urban non-flood-passing river | |
| CN106830506B (en) | An Enhanced Nitrogen and Phosphorus Removal Bioretention Pond Applied in Sponge City Construction | |
| CN102531157B (en) | Biological aerated filter packing and preparation method thereof | |
| CN102251459A (en) | System for carrying out collection, purification and utilization on rainwater on road surfaces | |
| CN204324990U (en) | Be applicable to the multi-stage biological filter tank-ecological pond purification system into lake landscape water body | |
| CN113636658B (en) | Ecological spliced blanket capable of purifying sediment and water pollutants continuously | |
| CN104261554A (en) | Method for treating sewage by using architectural regenerated aggregate as biomembrane carrier | |
| CN102964028A (en) | Underground water advection percolation system used for town sewage treatment | |
| CN110759481A (en) | Biological detention pond of high-efficient dephosphorization | |
| CN218579793U (en) | Compound nitrogen and phosphorus removal constructed wetland-microbial fuel cell system | |
| CN104556378A (en) | Integrated treatment system for rural domestic sewage and process of system | |
| CN107364973B (en) | Sewage treatment system, application thereof and sewage treatment method | |
| CN106115928A (en) | A kind of substrate of vertical-flow constructed wetlands structural system | |
| CN202576089U (en) | Ecological combination pond | |
| CN101391840A (en) | A kind of artificial soil construction method of ecological wetland | |
| CN208948975U (en) | A kind of composite constructed wetland system | |
| CN111058425A (en) | An ecological riverbed structure and construction method | |
| CN211394022U (en) | River sewage treatment device | |
| CN211394183U (en) | Vertical flow-baffling anti-blocking ecological filter dam of non-flood-running river | |
| CN102617002A (en) | Method for treating dispersed domestic sewage | |
| CN114772736B (en) | Improved constructed wetland sewage treatment system | |
| CN113501580B (en) | In-situ circulation treatment system for landscape lake water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240904 Address after: 100015 601 6, 104 building, 10 Jiuxianqiao North Road, Chaoyang District, Beijing. Applicant after: BEIJING ORIENTAL LANDSCAPE ENVIRONMENT Co.,Ltd. Country or region after: China Applicant after: Oriental Garden Ecological Engineering Co.,Ltd. Address before: 100015 building 104, courtyard a, Jiuxianqiao North Road, Chaoyang District, Beijing Applicant before: BEIJING ORIENTAL LANDSCAPE ENVIRONMENT Co.,Ltd. Country or region before: China |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |