CN111056640A - Constructed wetland structure suitable for cold areas - Google Patents
Constructed wetland structure suitable for cold areas Download PDFInfo
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- CN111056640A CN111056640A CN201911298003.7A CN201911298003A CN111056640A CN 111056640 A CN111056640 A CN 111056640A CN 201911298003 A CN201911298003 A CN 201911298003A CN 111056640 A CN111056640 A CN 111056640A
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- wetland
- water
- subsurface flow
- water inlet
- tank
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 239000012767 functional filler Substances 0.000 claims abstract description 34
- 239000010865 sewage Substances 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000010457 zeolite Substances 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 241000237502 Ostreidae Species 0.000 claims description 2
- 235000020636 oyster Nutrition 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 3
- 230000003631 expected effect Effects 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007102 metabolic function Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
Abstract
An artificial wetland structure suitable for cold areas, which aims to overcome the defects that in the artificial wetland in the prior art, in the cold areas and the areas with thicker frozen soil layers in winter, the sewage of the artificial wetland is difficult to enter, or the sewage is easy to freeze after entering, and the water quality treatment can not reach the expected effect and even stop, and the artificial wetland structure suitable for cold areas comprises a vertical flow artificial wetland system and a horizontal subsurface flow artificial wetland system, wherein the horizontal subsurface flow artificial wetland system comprises a subsurface flow water inlet tank, a subsurface flow water inlet pipe, a subsurface flow wetland functional filler and a water outlet tank, the subsurface flow water inlet tank and the water outlet tank are respectively arranged at two sides of the vertical flow artificial wetland system, the adjacent tank walls are provided with water permeable tracery walls, the subsurface flow wetland functional filler is laid on a rubble layer of the vertical flow artificial wetland system, the outlet of the subsurface flow water inlet pipe is communicated with the subsurface flow water inlet tank, and the outlet of the lower layer water collecting pipe is communicated with the water outlet tank. The invention can achieve better treatment effect on sewage at low temperature and is suitable for artificial wetlands in cold regions.
Description
Technical Field
The invention relates to the field of sewage treatment and water ecological restoration, in particular to an artificial wetland structure suitable for cold regions.
Background
The artificial wetland is a sewage advanced treatment technology which is developed in recent years, a composite ecosystem consisting of a water-permeable filler substrate, aquatic or marsh plants and microorganisms growing depending on the filler substrate is utilized, and sewage is purified through organic combination among physical (adsorption, filtration and precipitation), chemical (ion exchange) and biological (plant growth extracts nutrients and microorganism metabolism). However, the sewage treatment effect of the artificial wetland is influenced by factors such as wetland types, pollution load, wetland plant growth conditions, operation modes, filler components, temperature change and the like. Compared with other influencing factors, the temperature condition has great influence on the water quality treatment effect, and is an important limiting factor for the development of the artificial wetland because the temperature condition is difficult to effectively regulate manually.
When the artificial wetland operates under a low-temperature condition, wetland plants can enter a dormant state or wither and even die, so that the wetland plants cannot play a role; the activity and metabolic function of microbial enzymes at low temperature become slow, the physiological activity is difficult to effectively carry out, and the pollutant removal efficiency is greatly reduced; when the temperature is lowered, the adsorption function and ion exchange rate of the filler are slowed down, and the water quality treatment effect is also deteriorated. In some areas with thick frozen soil layers in winter, because the thickness of the frozen soil of the local soil layer is large, water cannot enter the artificial wetland easily, or sewage entering the wetland is frozen, so that the operation of the whole sewage treatment system is influenced. Therefore, the current artificial wetland technology is more applied in southern areas, but is difficult to popularize and use in the wide northern areas and the areas with large annual temperature difference in China. In order to solve the problem that the artificial wetland is difficult to effectively exert the sewage treatment effect in cold areas and areas with thick frozen soil layers in winter, the current measures mainly comprise straw covering, PVC film covering, greenhouse building or straw and PVC film heat preservation, however, in the actual application, the measures have the defects of unobvious heat preservation effect and difficult water quality treatment to achieve the expected effect, or the vertical flow artificial wetland is difficult to realize water inlet due to the large thickness of the frozen soil of the local soil layer to cause shutdown.
Disclosure of Invention
The invention overcomes the defects that in the prior art, the sewage of the artificial wetland is difficult to enter in the cold area and the area with a thick frozen soil layer in winter, or is easy to freeze after entering, the operation of the whole sewage treatment system is influenced, the water quality treatment can not reach the expected effect, and even the artificial wetland is shut down, and provides the artificial wetland structure suitable for the cold area.
The invention adopts the technical scheme that the purpose of the invention is realized by: an artificial wetland structure suitable for cold areas comprises a vertical flow artificial wetland system, wherein the vertical flow artificial wetland system is sequentially provided with artificial wetland plants, an upper layer water distribution pipe, a vertical flow wetland functional filler, a gravel layer and a lower layer water collection pipe from top to bottom, and further comprises a horizontal subsurface flow artificial wetland system, the horizontal subsurface flow artificial wetland system comprises a subsurface flow water inlet tank, a subsurface flow water inlet pipe, a subsurface flow wetland functional filler and a water outlet tank, the subsurface flow water inlet tank and the water outlet tank are respectively arranged at two sides of the vertical flow artificial wetland system, water permeable tracery walls are arranged on adjacent tank walls, the subsurface flow wetland functional filler is laid on the side surface of the gravel layer of the vertical flow artificial wetland system to form a horizontal waterway in which sewage flows through the subsurface flow water inlet tank, the subsurface flow wetland functional filler, the gravel and the water outlet tank, the sewage of the artificial wetland is respectively communicated with the subsurface flow water inlet pipe and the upper layer water distribution pipe through valves, the outlet of the undercurrent water inlet pipe is communicated with the undercurrent water inlet pool, and the outlet of the lower layer water collecting pipe is communicated with the water outlet pool.
Furthermore, the subsurface flow wetland functional filler is paved on two sides of the gravel.
Further, the subsurface flow wetland functional filler comprises: the filler comprises sand, zeolite, activated carbon, oyster shells and steel slag, wherein the particle size of the filler is 10-15 mm, and the thickness of the filler is 30-60 cm.
Further, the vertical flow wetland functional filler comprises: sand, zeolite, activated carbon, oyster shell and steel slag, the grain diameter is less than 10mm, and the thickness of the filler is more than 60 cm.
Furthermore, the thickness of the gravel layer is 30-60 cm, the particle size of the gravel is 15-30mm, and the gradient is 0.5-1%.
The invention has the beneficial effects that: the invention utilizes the characteristics of vertical underflow and horizontal underflow and the water flow mode to reform the artificial wetland structure. When the lowest temperature is less than 0 ℃ in winter, the wetland system is switched to horizontal subsurface flow constructed wetland for water inflow, the water outlet of the subsurface flow water inlet pipe can keep the water temperature without being frozen under the coverage of sewage stored in the subsurface flow water inlet tank, and when the sewage in the subsurface flow water inlet tank enters the subsurface flow wetland functional filler for treatment through the water permeable wall, the upper part of the filler is covered by the vertical flow wetland functional filler with the thickness of more than 60cm, so that the temperature of the lower layer filler is ensured, the smooth water inflow of the wetland and the water quality treatment effect of the horizontal subsurface flow wetland are further ensured, the system can adapt to the temperature change, and the efficient and stable operation of the system is kept. The invention provides a novel, cheap, efficient and stable constructed wetland structure which can be used in cold areas, has high sewage treatment efficiency and saves construction materials, can be more suitable for cold areas and areas with thick frozen soil layers in winter compared with common constructed wetlands, has stronger environmental applicability, and can achieve better sewage treatment effect at low temperature.
The invention is further described with reference to the following detailed description and accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the attached drawing, 1 is an artificial wetland plant, 2 is an upper water distribution pipe, 3 is a vertical flow wetland functional filler, 4 is a gravel layer, 5 is a lower water collecting pipe, 6 is an underflow water inlet tank, 7 is an underflow water inlet pipe, 8 is an underflow wetland functional filler, 9 is an outlet tank, and 10 is a water permeable tracery wall.
Detailed Description
As shown in the attached drawings, the constructed wetland structure suitable for cold regions of the embodiment comprises a vertical flow constructed wetland system and a horizontal subsurface flow constructed wetland system. The vertical flow constructed wetland system is sequentially provided with constructed wetland plants 1, an upper layer water distribution pipe 2, a vertical flow wetland functional filler 3, a rubble layer 4 and a lower layer water collection pipe 5 from top to bottom. The artificial wetland plants 1 are harvested periodically when the wetland is in operation, and when the lowest temperature in winter is less than 0 ℃, the artificial wetland plants 1 are harvested and then laid on the surface of the vertical flow wetland functional filler 3 to protect the upper water distribution pipe 2. The surface of the lower layer water collecting pipe 5 is provided with small holes, so that the treated water can enter the lower layer water collecting pipe 5 conveniently. The preferred vertical flow wetland functional filler 3 of this embodiment comprises: the grain size of the sand, the zeolite, the activated carbon, the oyster shell and the steel slag is less than 10mm, the thickness of the filler is more than 60cm, and the specific thickness and the ratio of the filler are determined according to the thickness of the local frozen soil layer and the water quality requirements of inlet and outlet water. In the embodiment, the thickness of the gravel layer 4 is preferably 30-60 cm, the particle size of the gravel is 15-30mm, and the gradient is 0.5-1%.
The horizontal subsurface flow constructed wetland system comprises a subsurface flow water inlet tank 6, a subsurface flow water inlet pipe 7, a subsurface flow wetland functional filler 8 and a water outlet tank 9. The undercurrent water inlet pool 6 and the water outlet pool 9 are respectively arranged at two sides of the vertical current artificial wetland system, and the adjacent pool walls are provided with water permeable tracery walls 10. The sewage in the subsurface flow water inlet tank 6 flows into the horizontal subsurface flow constructed wetland system through the water permeable tracery wall 10 and then flows into the water outlet tank 9 through the water permeable tracery wall 10. The subsurface flow wetland functional filler 8 is paved on the side surface of the gravel layer 4 of the vertical flow artificial wetland system, and the upper part of the subsurface flow wetland functional filler is covered by the vertical flow wetland functional filler 3, so that a horizontal waterway in which sewage flows through the subsurface flow water inlet pool 6, the subsurface flow wetland functional filler 8, the gravel and the water outlet pool 9 is formed. The subsurface flow wetland functional filler 8 can be independently paved on the gravel layer close to the front end of the sewage inlet pool 6, and also can be respectively paved on two sides of the gravel layer, and the subsurface flow wetland functional filler 8 preferred in the embodiment is paved on two sides of the gravel layer and is divided into an inlet water strengthening section and an outlet water strengthening section. The subsurface flow wetland functional filler 8 comprises: the particle size of the sand, the zeolite, the activated carbon, the oyster shell and the steel slag is 10-15 mm, the thickness of the filler is 30-60 cm, and the proportion and the thickness of the filler are determined according to the thickness of a local frozen soil layer and the water quality requirements of inlet and outlet water. The sewage of the artificial wetland is respectively communicated with the undercurrent water inlet pipe 7 and the upper layer water distribution pipe 2 through a valve, and the flow direction of the sewage of the artificial wetland is controlled through the valve according to the weather condition. The outlet of the undercurrent water inlet pipe 7 is communicated with the undercurrent water inlet pool 6, the outlet of the undercurrent water inlet pipe 7 extends into the bottom of the undercurrent water inlet pool 6, the water level depth of the undercurrent water inlet pool 6 is determined according to the air temperature, and the sewage at the bottom of the undercurrent water inlet pool 6 is ensured not to be frozen even in a low-temperature environment. The outlet of the lower layer water collecting pipe 5 is communicated with a water outlet pool 9.
And (3) during actual operation: when the lowest temperature is higher than 0 ℃ in the day, the wetland system is switched to vertical flow artificial wetland for water inflow, a valve communicated with an upper water distribution pipe 2 is opened, a valve communicated with a subsurface flow water inlet pipe 7 is closed, sewage to be treated firstly enters the upper water distribution pipe 2 and then dispersedly flows into the vertical flow wetland functional filler 3 for treatment, the treated water is filtered by a gravel layer 4 and is collected to a lower water collection pipe 5 with small holes, and finally flows into a water outlet pool 9 and is discharged out of the wetland. When the lowest temperature is less than 0 ℃ in the day, the wetland system is switched to horizontal subsurface flow constructed wetland for water inflow, a valve communicated with a subsurface flow water inlet pipe 7 is opened, a valve communicated with an upper layer water distribution pipe 2 is closed, sewage to be treated firstly flows into a subsurface flow water inlet tank 6 through the subsurface flow water inlet pipe 7, then flows into a water inflow strengthening section of the subsurface flow wetland functional filler 8 through a water permeable tracery wall 10 for strengthening treatment, then flows through gravel filtration of a gravel layer 4, then flows into a water outflow strengthening section of the subsurface flow wetland functional filler 8 for further strengthening treatment, and finally strengthened water flows into a water outflow tank 9 through the water permeable tracery wall 10 and is discharged out of the wetland.
Claims (5)
1. The constructed wetland structure suitable for the cold areas comprises a vertical flow constructed wetland system, wherein the vertical flow constructed wetland system is sequentially provided with constructed wetland plants, an upper-layer water distribution pipe, a vertical flow wetland functional filler, a gravel layer and a lower-layer water collection pipe from top to bottom, and is characterized by further comprising a horizontal subsurface flow constructed wetland system, the horizontal subsurface flow constructed wetland system comprises a subsurface flow water inlet tank (6), a subsurface flow water inlet pipe (7), a subsurface flow wetland functional filler (8) and a water outlet tank (9), the subsurface flow water inlet tank (6) and the water outlet tank (9) are respectively arranged on two sides of the vertical flow constructed wetland system, water permeable tracery walls (10) are arranged on adjacent tank walls, the subsurface flow wetland functional filler (8) is laid on the side surface of the gravel layer (4) of the vertical flow constructed wetland system to form sewage flowing through the subsurface flow water inlet tank (6), the subsurface flow wetland functional filler (8), The artificial wetland comprises gravels and a horizontal water path of a water outlet pool (9), sewage of the artificial wetland is respectively communicated with an underflow water inlet pipe (7) and an upper water distribution pipe (2) through a valve, the outlet of the underflow water inlet pipe (7) is communicated with an underflow water inlet pool (6), and the outlet of a lower water collection pipe (5) is communicated with the water outlet pool (9).
2. The constructed wetland structure suitable for cold areas according to claim 1, characterized in that the subsurface wetland functional filler (8) is laid on both sides of the gravels.
3. The constructed wetland structure suitable for cold regions according to claim 1, wherein the subsurface wetland functional filler (8) comprises: the filler comprises sand, zeolite, activated carbon, oyster shells and steel slag, wherein the particle size of the filler is 10-15 mm, and the thickness of the filler is 30-60 cm.
4. The constructed wetland structure suitable for cold regions according to claim 1, wherein the vertical flow wetland functional filler (3) comprises: sand, zeolite, activated carbon, oyster shell and steel slag, the grain diameter is less than 10mm, and the thickness of the filler is more than 60 cm.
5. The constructed wetland structure suitable for cold regions according to claim 1, wherein the thickness of the gravel layer (4) is 30-60 cm, the particle size of the gravel is 15-30mm, and the gradient is 0.5-1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298003.7A CN111056640A (en) | 2019-12-17 | 2019-12-17 | Constructed wetland structure suitable for cold areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298003.7A CN111056640A (en) | 2019-12-17 | 2019-12-17 | Constructed wetland structure suitable for cold areas |
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| CN111056640A true CN111056640A (en) | 2020-04-24 |
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| CN201911298003.7A Pending CN111056640A (en) | 2019-12-17 | 2019-12-17 | Constructed wetland structure suitable for cold areas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979086A (en) * | 2021-03-04 | 2021-06-18 | 中南林业科技大学 | Enhanced constructed wetland dephosphorization packed bed |
| CN113603226A (en) * | 2021-08-09 | 2021-11-05 | 广州市水之道生态环境修复有限公司 | Shallow geothermal self-circulation system for artificial wetland in cold region |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973636A (en) * | 2010-09-26 | 2011-02-16 | 山东大学 | Distributed water inflow enhanced biological denitrification subsurface flow wetland |
| US20130175215A1 (en) * | 2012-01-09 | 2013-07-11 | Chinese Research Academy Of Environmental Sciences | Engineered wetland device of continuous operation for wastewater treatment under low temperature |
| US20140124420A1 (en) * | 2011-05-24 | 2014-05-08 | Korbi Co., Ltd. | Hybrid artificial wetland water purification system, sewage treatment device using same, and natural nonpoint purification device capable of simultaneously purifying river and lake water |
| CN107522287A (en) * | 2017-09-04 | 2017-12-29 | 北京东方园林环境股份有限公司 | A kind of process for purifying water of artificial wet land system |
| CN108585213A (en) * | 2018-08-01 | 2018-09-28 | 北京东方园林环境股份有限公司 | A kind of switchable type drowned flow artificial wet land and its execution switching method |
| CN109179679A (en) * | 2018-10-30 | 2019-01-11 | 中国科学院水生生物研究所 | It is a kind of can alternate run artificial swamp and its workflow |
| WO2019114742A1 (en) * | 2017-12-13 | 2019-06-20 | 中国环境科学研究院 | Method and device for preventing and controlling pollutants in basin water resource utilization |
| CN212127703U (en) * | 2019-12-17 | 2020-12-11 | 深圳市碧园环保技术有限公司 | Constructed wetland structure suitable for cold areas |
-
2019
- 2019-12-17 CN CN201911298003.7A patent/CN111056640A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973636A (en) * | 2010-09-26 | 2011-02-16 | 山东大学 | Distributed water inflow enhanced biological denitrification subsurface flow wetland |
| US20140124420A1 (en) * | 2011-05-24 | 2014-05-08 | Korbi Co., Ltd. | Hybrid artificial wetland water purification system, sewage treatment device using same, and natural nonpoint purification device capable of simultaneously purifying river and lake water |
| US20130175215A1 (en) * | 2012-01-09 | 2013-07-11 | Chinese Research Academy Of Environmental Sciences | Engineered wetland device of continuous operation for wastewater treatment under low temperature |
| CN107522287A (en) * | 2017-09-04 | 2017-12-29 | 北京东方园林环境股份有限公司 | A kind of process for purifying water of artificial wet land system |
| WO2019114742A1 (en) * | 2017-12-13 | 2019-06-20 | 中国环境科学研究院 | Method and device for preventing and controlling pollutants in basin water resource utilization |
| CN108585213A (en) * | 2018-08-01 | 2018-09-28 | 北京东方园林环境股份有限公司 | A kind of switchable type drowned flow artificial wet land and its execution switching method |
| CN109179679A (en) * | 2018-10-30 | 2019-01-11 | 中国科学院水生生物研究所 | It is a kind of can alternate run artificial swamp and its workflow |
| CN212127703U (en) * | 2019-12-17 | 2020-12-11 | 深圳市碧园环保技术有限公司 | Constructed wetland structure suitable for cold areas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979086A (en) * | 2021-03-04 | 2021-06-18 | 中南林业科技大学 | Enhanced constructed wetland dephosphorization packed bed |
| CN113603226A (en) * | 2021-08-09 | 2021-11-05 | 广州市水之道生态环境修复有限公司 | Shallow geothermal self-circulation system for artificial wetland in cold region |
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