CN106882879B - Composite vertical flow constructed wetland purification system suitable for discharged tail water of sewage plant - Google Patents
Composite vertical flow constructed wetland purification system suitable for discharged tail water of sewage plant Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 238000000746 purification Methods 0.000 title claims abstract description 40
- 239000010865 sewage Substances 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 35
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 29
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 19
- 239000011593 sulfur Substances 0.000 claims abstract description 19
- 235000019738 Limestone Nutrition 0.000 claims abstract description 16
- 239000006028 limestone Substances 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims abstract description 13
- 241000196324 Embryophyta Species 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 20
- 241000209094 Oryza Species 0.000 claims description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims description 10
- 235000009566 rice Nutrition 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 230000029553 photosynthesis Effects 0.000 claims description 4
- 238000010672 photosynthesis Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
- 239000004700 high-density polyethylene Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 229910052698 phosphorus Inorganic materials 0.000 description 10
- 239000011574 phosphorus Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 230000001651 autotrophic effect Effects 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 241001517066 Iris sibirica Species 0.000 description 1
- 241000383558 Thalia <angiosperm> Species 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
-
- 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)
- Biotechnology (AREA)
- Botany (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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a composite vertical flow constructed wetland purification system suitable for tail water discharged from a sewage plant, which adopts the technical scheme that a Mi stone layer, a sulfur layer and a limestone layer are respectively paved in a matrix bed body vertically from top to bottom to form a purification matrix, a vent pipe extending into the limestone layer is uniformly distributed on the purification matrix, vent holes communicated with the inside and the outside are uniformly distributed on the vent pipe, a partition wall is arranged in the matrix bed body and partitions the inner cavity of the matrix bed body into an upstream bed body cavity and a downstream bed body cavity which are not communicated with each other, a water inlet pipe is paved at the bottom of the upstream bed body cavity, a water collecting pipe is paved at the bottom of the downstream bed body cavity, and a water collecting-distributing pipe with two sealed ends and two ends respectively extending into the Mi stone layers of the upstream bed body cavity and the downstream bed body cavity is arranged at the upper part of the partition wall.
Description
Technical Field
The invention relates to an ecological purification system for discharged tail water of a sewage plant, in particular to a composite vertical flow artificial wetland purification system suitable for the discharged tail water of the sewage plant.
Background
At present, the problem of water environment pollution in China is serious, and water resource shortage, insufficient environmental flow and poor river water quality are serious problems faced by the water environment in China. Taking the province of Henan as an example, in 53 main rivers of 3 river areas of Huaihe river, haihe river and yellow river in the province of Henan, 35 pieces of passive head water exist, the river channels are basically municipal sewage and industrial wastewater treated by a sewage plant, even if the sewage treatment plant executes the most strict sewage discharge standard (the first-level A standard of pollutant discharge standard of municipal sewage treatment plant), the V-type standard of surface water environment quality standard (GB 3838-2002) is difficult to meet, the low carbon-nitrogen ratio is a remarkable characteristic of tail water discharged by the sewage treatment plant, and especially the removal of nitrogen and phosphorus pollutants in the sewage is a difficult problem of sewage treatment; and artificial reconstruction measures such as constructing a gate dam, cutting a curve and straightening a river channel are adopted, so that the river is accumulated day by day, the eutrophication problem of the river is obvious, and the self-purification capacity is weak.
The artificial wetland sewage treatment technology is a sewage ecological treatment technology which is developed in the 70 th century, has the advantages of low investment, low operating cost, convenient management, no secondary pollution and the like, is successfully applied to the treatment of domestic sewage, rural point sources and surface source pollution, storm runoff, lake eutrophication and the like in recent years, and achieves remarkable effect. The artificial wetland is divided into three types of surface flow wetland, horizontal subsurface flow wetland and vertical flow wetland, and is favored by the vertical flow artificial wetland with high pollution load and small floor area by combining the current situations of high water quality and high land utilization rate of tail water discharged from sewage plants in China. However, the vertical flow artificial wetland is also exposed to a plurality of problems in the practical application process, such as being susceptible to climatic conditions and temperatures (low temperature in winter, withered plants, reduced microbial activity, poor treatment effect), easy saturation and blockage of substrates, single decontamination function, unreasonable operation management and the like, and the problems limit the popularization and application of the vertical flow artificial wetland to a certain extent.
At present, although a great deal of research is conducted at home and abroad on the aspects of the structure, matrix assembly, water distribution mode, reoxygenation mode, plant configuration, heat preservation measures and the like of the vertical flow artificial wetland, many problems to be solved still exist, such as timely adjusting the hydraulic retention time and water level of sewage in a wetland bed according to the water quality condition, improving the purification effect of synchronous nitrogen and phosphorus removal, ensuring the treatment effect in low-temperature seasons and the like.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the common problems of low carbon-nitrogen ratio of the discharged tail water of the sewage treatment plant, low synchronous nitrogen and phosphorus removal capability of the wetland, poor winter sewage purification effect and the like, the composite vertical flow constructed wetland system is reasonable in structural design, uniform in water distribution and water collection, strong in synchronous nitrogen and phosphorus removal capability and good in winter operation effect, the nitrogen and phosphorus removal capability of the vertical flow wetland system can be obviously improved by the substrate configuration and laying of the system, the hydraulic retention time and the water level of the system can be adjusted by the water inlet and water collection system, the sewage purification effect is ensured, and the operation and the maintenance are simple.
The invention solves the technical scheme that a composite vertical flow constructed wetland purification system suitable for tail water discharged by a sewage plant comprises a water inlet channel, a water receiving channel and a matrix bed body, wherein a millstone layer, a sulfur layer and a limestone layer are respectively paved in the matrix bed body from top to bottom along the vertical direction to form a purification matrix, vent pipes extending into the limestone layer are uniformly distributed on the purification matrix, vent holes which are communicated with the inside and the outside are uniformly distributed on the vent pipes, a partition wall is arranged in the matrix bed body and divides an inner cavity of the matrix bed body into an upstream bed body cavity and a downstream bed body cavity which are not communicated with each other, a water inlet pipe is paved at the bottom of the upstream bed body cavity, the water inlet pipe is open at one end and sealed at one end, the open end of the water inlet pipe extends into the water inlet channel, and water distribution holes which are communicated with the inside and the outside are uniformly distributed on the water inlet pipe positioned in the upstream bed body cavity, the bottom of the downstream bed cavity is laid with a water collecting pipe with one open end and one sealed end, the open end of the water collecting pipe extends into the water collecting channel, the water collecting pipe in the downstream bed cavity is evenly provided with water collecting holes communicated with the inside and the outside, the upper part of the partition wall is provided with water collecting-distributing pipes with two sealed ends and two ends respectively extending into the meter stone layers of the upstream bed cavity and the downstream bed cavity horizontally, the water collecting-distributing pipes extending into the upstream bed cavity are evenly provided with water collecting-distributing holes communicated with the inside and the outside, the water collecting-distributing pipes extending into the upstream bed cavity correspond to the water inlet pipe to form an upstream flow guiding purification structure, and the water collecting-distributing pipes extending into the downstream bed cavity correspond to the water collecting pipes to form a downstream flow guiding purification structure.
The water inlet pipe is provided with a first rotating elbow at one end extending into the water inlet channel, the first rotating elbow is rotated to adjust the height of the water inlet, so that the hydraulic retention time of water flow in an upstream bed body cavity is controlled, the end of the water collecting pipe extending into the water collecting channel is provided with a second rotating elbow, the height of the water outlet is adjusted by rotating the second rotating elbow, and the water level of a downstream bed body cavity is controlled, so that the water level can adapt to the change of seasons and water quality, and the purification effect of the wetland purification system is ensured.
Wetland plants are planted on the rice stone layer, and the matching of the three substrate layers combines the dissolved oxygen regulation and control of the vent pipe and the assimilation and photosynthesis of the wetland plants, so that the synchronous nitrogen and phosphorus removal capability of the wetland purification system is improved.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention has novel and unique structure, easy construction and low cost, and the rotatable elbow is arranged at the water inlet, so that the hydraulic retention time and the water level of water flow in the cavity of the upstream bed body can be controlled according to actual requirements, thereby ensuring the sewage purification effect; the rotatable elbow is arranged at the water outlet, the water level in the matrix bed can be timely regulated and controlled according to the characteristics of regional climate and environment and the condition of the water quality of inlet water, and the tidal wet-dry alternate operation of the wetland can improve the dissolved oxygen concentration of the water in the matrix bed, avoid the blockage of the matrix bed and ensure the winter treatment effect of the composite vertical flow artificial wetland.
The invention applies the substrate materials such as the sulfur layer, the limestone layer and the like to the construction of the wetland, the sulfur simple substance is beneficial to removing nitrogen in the water body, the removal rate of the wetland system to the TN of the sewage treatment discharged tail water is more than 90 percent, and the wetland system can generate Ca in the process of sulfur autotrophic denitrification 2+ When Ca is present 2+ And PO 4 3- The concentration of the phosphate reaches a certain degree, the activity product of the phosphate exceeds the solubility product, so that the phosphate is removed through precipitation, the removal rate can reach more than 50 percent, the total phosphorus concentration of effluent is lower than 0.3mg/L, and the phosphate removing method has the advantages of simple operation and maintenance, convenient use, good effect and good social and economic benefits.
Drawings
FIG. 1 is a sectional front view of the present invention, wherein arrow A indicates the direction of water flow in an upstream bed chamber and arrow B indicates the direction of water flow in a downstream bed chamber.
Fig. 2 is a cross-sectional side view of the present invention.
FIG. 3 is a schematic view of the bottom structure of the matrix bed of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in figures 1-3, the invention comprises a water inlet channel 2, a water collecting channel 15 and a matrix bed body 1, wherein a Mickel layer 12, a sulfur layer 13 and a lime stone layer 14 are respectively paved in the matrix bed body 1 from top to bottom along the vertical direction to form a purification matrix, an air pipe 10 extending into the lime stone layer is uniformly distributed on the purification matrix, an air hole communicated with the inside and the outside is uniformly distributed on the air pipe 10, a partition wall 5 is arranged in the matrix bed body 1, the partition wall 5 partitions the inner cavity of the matrix bed body 1 into an upstream bed body cavity and a downstream bed body cavity which are not communicated with each other, a water inlet pipe 3 is paved at the bottom of the upstream bed body cavity, the water inlet pipe 3 is open at one end and sealed at the other end, water distribution holes 4 communicated with the inside and the outside are uniformly distributed on the water inlet pipe positioned in the upstream bed body cavity, the bottom of the downstream bed cavity is laid with a water receiving pipe 8 with an open end and a sealed end, the open end of the water receiving pipe extends into a water receiving channel 15, the water receiving pipe in the downstream bed cavity is evenly provided with water receiving holes 9 which are communicated with the inside and the outside, the upper part of the partition wall 5 is provided with a water receiving-distributing pipe 6 with two sealed ends and two ends respectively extending into the meter stones of the upstream bed cavity and the downstream bed cavity horizontally, the water receiving-distributing pipe 6 extending into the part is evenly provided with water receiving-distributing holes 7 which are communicated with the inside and the outside, the water receiving-distributing pipe extending into the part of the upstream bed cavity corresponds to the water inlet pipe 3 to form an upstream flow guiding and purifying structure, and the water receiving-distributing pipe extending into the part of the downstream bed cavity corresponds to the water receiving pipe 8 to form the downstream flow guiding and purifying structure.
For guaranteeing the result of use, inlet tube 3 stretch into one end of inlet channel 2 and be equipped with first rotatory elbow 3a, rotatory first rotatory elbow, adjust the water inlet height, the water level in the steerable up-flow bed intracavity, and then the water conservancy dwell time in the control up-flow bed, the one end that water receiving pipe 8 stretches into water receiving channel 15 is equipped with second rotatory elbow 8a, and rotatory second rotatory elbow adjusts the delivery port height, thereby the water level of control down-flow bed coelom, in order to adapt to season and quality of water change, guarantee wetland clean system's purifying effect, first rotatory elbow 3a and second rotatory elbow 8a all adopt the PVC material to make, can 180 rotations, adjusts import/export height through the angle change.
The rice stone layer 12 is composed of rice stone particles, the grain size of the rice stone particles is 0.5-1.0cm, the laying thickness is 30cm, the sulfur layer 13 is composed of sulfur, the grain size of the sulfur is 1.0-3.0cm, the laying thickness is 40cm, the limestone stone layer 14 is composed of limestone, the grain size of the limestone is 3.0-8.0cm, the laying thickness is 70cm, wetland plants 11 are planted on the rice stone layer 12, and the dissolved oxygen regulation and control of the ventilation pipe 10 and the assimilation and photosynthesis of the wetland plants 11 are combined, so that the synchronous nitrogen and phosphorus removal capacity of the wetland purification system is improved; the wetland plants mainly comprise Siberian iris, thalia scholaria and the like, and the planting density is 40cm in plant spacing and 40cm in row spacing.
The matrix bed body 1 is of a rectangular hollow structure with an opening at the upper part, the length-width ratio is 2: 1, the depth of an inner cavity is 1.7m, an anti-seepage layer 16 is laid at the bed bottom of the matrix bed body 1, and the anti-seepage layer 16 is a composite bottom layer consisting of a rammed 20 cm-thick plain soil layer 16-3, a 1.5mm high-density polyethylene anti-seepage cloth 16-2 and a rammed 10 cm-thick clay layer 16-1.
The water inlet pipe 3, the water collecting-distributing pipe 6 and the water collecting pipe 8 are all made of PVC pipes, the pipe diameter is 15cm, the distance between every two of the water distributing holes 4, the distance between every two of the water collecting-distributing holes 7 and the distance between every two of the water collecting holes 9 are all 30cm, and the hole diameters of the water distributing holes 4, the water collecting-distributing holes 7 and the water collecting holes 9 are all 0.7cm.
The ventilation pipes 10 are made of PVC pipes, the pipe diameter is 1.5cm, the distance between every two ventilation holes is 8cm, the aperture is 0.3cm, the ventilation pipes 10 are uniformly distributed along the longitudinal direction of the matrix bed body, and the distribution distance is 1.5m.
It can be clearly seen from above-mentioned structure that, during the use, the water of inlet channel 2 is through the purification from bottom to top of the upstream bed body chamber and the purification treatment of downstream bed body chamber top-to-bottom, from the terminal row income canal that receives the water pipe, receive the water pipe end and adopt 180 rotatable elbows, through adjusting rotation angle in order to control the inside water level of downstream matrix bed body, reduce the interior water level of wetland bed when operation in winter, make full use of geothermal heat preservation effect, the alternating operation of morning and evening tides formula wet and dry in the wetland bed, avoid the wetland bed matrix to block up.
The Miao stone layer, the sulfur layer and the limestone layer are vertically paved from top to bottom in the matrix bed body, the sulfur can provide an electron donor, the biological denitrification effect of the sulfur autotrophic denitrification of the wetland is improved, nitrogen elements in sewage and PO in the sewage are effectively removed 4 3- With Ca produced during denitrification 2+ Can be removed by precipitation, combines assimilation and photosynthesis of wetland plants, ensures synchronous nitrogen and phosphorus removal effect of the wetland, and reduces sulfur (S) 2- ，S 0 ，S 2 O 3 2- ) As an electron donor, the method can improve the sulfur autotrophic denitrification and denitrification effect of the wetland, wherein the sulfur particles are slightly soluble in water, and has the advantages of wide source, low price, good denitrification effect and the like, compared with other autotrophic denitrification technologies, the method is simple to operate, economical, energy-saving and wide in application space, and through field application and test, the COD (chemical oxygen demand) of the effluent is less than or equal to 30mg/L, the ammonia nitrogen is less than or equal to 1.5mg/L, the TP (total phosphorus) is less than or equal to 0.3mg/L, and BOD (biochemical oxygen demand) is 5 The main water quality indexes of less than or equal to 6mg/L are all lower than IV standard of surface water environmental quality standard (GB 3838-2002).
Claims (4)
1. A composite vertical flow constructed wetland purification system suitable for tail water discharged from a sewage plant comprises a water inlet channel (2), a water receiving channel (15) and a matrix bed body (1), and is characterized in that a rice stone layer (12), a sulfur layer (13) and a limestone layer (14) are respectively paved in the matrix bed body (1) from top to bottom along the vertical direction to form a purification matrix, wherein the rice stone layer (12) is composed of rice stone particles, the particle size of the rice stone particles is 0.5-1.0cm, the paving thickness is 30cm, the sulfur layer (13) is composed of sulfur, the particle size of the sulfur is 1.0-3.0cm, the paving thickness is 40cm, the limestone layer (14) is composed of limestone, the particle size of the limestone is 3.0-8.0cm, the paving thickness is 70cm, plants (11) are planted on the rice stone layer (12), three matrix layers are matched, dissolved oxygen regulation of a vent pipe (10) and the wetland action and photosynthesis of the wetland plants (11) are combined, so that the synchronous denitrification and dephosphorization capability of the purification system can be improved; the water purification device is characterized in that vent pipes (10) extending into a limestone layer are uniformly distributed on a purification substrate, vent holes which are communicated with the inside and the outside are uniformly distributed on the vent pipes (10), a partition wall (5) is arranged in a substrate bed body (1), the partition wall (5) partitions the inner cavity of the substrate bed body (1) into an upstream bed body cavity and a downstream bed body cavity which are not communicated with each other, a water inlet pipe (3) is laid at the bottom of the upstream bed body cavity, the water inlet pipe (3) is open at one end and sealed at the other end, the open end of the water inlet pipe extends into a water receiving channel (15), water receiving holes (9) which are communicated with the inside and the outside are uniformly distributed on the water inlet pipe positioned in the upstream bed body cavity, a water receiving-water distributing pipe (6) which is open at one end and sealed at one end is arranged at the bottom of the downstream bed body cavity, water receiving-water distributing holes (9) which are communicated with the inside and the outside are uniformly distributed on the water receiving pipe positioned in the downstream bed body cavity, two sealed ends are arranged at the upper part of the partition wall (5), the upper part of the water receiving-distributing pipe, the water collecting-distributing pipe (6) which are sealed at two ends, the two ends of which are respectively horizontally extend into the upstream bed body cavity, the upstream bed body cavity and the water distributing pipe (7-distributing pipe, the water collecting-distributing pipe, the water distribution pipe structure of the purification device, and the upstream bed body, and the water purification device, the water purification structure of the upstream bed body, and the purification device are corresponding to form a structure, and the water purification structure, and the water distribution structure of the water purification device, and the water distribution structure of the water distribution device, and the water purification device is formed by the water distribution structure of the upstream bed body;
inlet tube (3) stretch into one end of inlet channel (2) and be equipped with first rotatory elbow (3 a), rotatory first rotatory elbow, adjust the water inlet height, thereby the hydraulic power dwell time of control rivers in upstream bed body chamber, receive one end that water pipe (8) stretched into and receive canal (15) to be equipped with second rotatory elbow (8 a), rotatory second rotatory elbow, adjust the delivery port height, thereby the water level of control downstream bed body chamber, in order to adapt to season and quality of water change, guarantee wetland clean system's purifying effect.
2. The composite vertical flow constructed wetland purification system suitable for the discharged tail water of the sewage plant as recited in claim 1, wherein the matrix bed body (1) is a rectangular hollow structure with an opening at the upper part, the length-width ratio is 2: 1, the depth of the inner cavity is 1.7m, an impermeable layer (16) is laid at the bottom of the matrix bed body (1), and the impermeable layer (16) is a composite bottom layer consisting of a rammed plain soil layer (16-3) with the thickness of 20cm, a 1.5mm high-density polyethylene impermeable cloth (16-2) and a rammed clay layer (16-1) with the thickness of 10 cm.
3. The composite vertical flow constructed wetland purification system suitable for the discharged tail water of sewage plants as recited in claim 1, wherein the water inlet pipe (3), the water collecting-distributing pipe (6) and the water collecting pipe (8) are all made of PVC pipes, the pipe diameter is 15cm, the distance between each two of the water distributing holes (4), each two of the water collecting-distributing holes (7) and each two of the water collecting holes (9) is 30cm, and the pore diameter of each of the water distributing holes (4), the water collecting-distributing holes (7) and the water collecting holes (9) is 0.7cm.
4. The composite vertical flow constructed wetland purification system suitable for the discharged tail water of the sewage plant as recited in claim 1, wherein the ventilation pipes (10) are made of PVC pipes, the pipe diameter is 1.5cm, the distance between every two ventilation holes is 8cm, the hole diameter is 0.3cm, the ventilation pipes (10) are uniformly arranged along the longitudinal direction of the matrix bed body, and the arrangement distance is 1.5m.
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| CN107720974B (en) * | 2017-11-24 | 2023-08-22 | 马鞍山三塔环保科技有限公司 | Modularized constructed wetland integrated equipment |
| CN111689583A (en) * | 2020-07-30 | 2020-09-22 | 清华大学 | Denitrification constructed wetland system |
| CN113387426B (en) * | 2021-06-03 | 2022-12-06 | 北京市水科学技术研究院 | Matrix modifier for ecological water replenishing rivers and lakes and modification method thereof |
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