CN112897813A - Composite artificial wetland structure suitable for cold area - Google Patents
Composite artificial wetland structure suitable for cold area Download PDFInfo
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- CN112897813A CN112897813A CN202110096051.9A CN202110096051A CN112897813A CN 112897813 A CN112897813 A CN 112897813A CN 202110096051 A CN202110096051 A CN 202110096051A CN 112897813 A CN112897813 A CN 112897813A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
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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
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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
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a composite artificial wetland structure suitable for cold areas, which comprises a water distribution tank, a vertical subsurface flow type artificial wetland, a horizontal subsurface flow type artificial wetland and an oxidation pond in a multistage combination mode. Sewage firstly flows into a water distribution tank for pretreatment to remove gravel and larger suspended matters. Then flows into a vertical subsurface flow constructed wetland for percolation treatment, then flows through a horizontal subsurface flow wetland, and finally flows into an oxidation pond. The vertical subsurface flow type artificial wetland comprises a downlink vertical artificial wetland unit and an uplink vertical artificial wetland unit, the bed filling matrix in the bottom of the 3-column artificial wetland tank adopts a layered structure, and the top of the packing layer is planted with a plant combination. The upper reaches of the pool body are provided with 1 water inlet tank, the two sides are respectively provided with 1 water outlet tank, multipoint water distribution is adopted, and the bottom is provided with a drain pipe and is connected with a hose. The invention can effectively solve the problem of shutdown caused by easy freezing or blockage of the artificial wetland under the condition of low temperature in the prior art, improve the water body purification efficiency, build a good landscape zone and save the occupied area.
Description
Technical Field
The invention relates to the field of sewage restoration and water environment treatment, in particular to a composite artificial wetland structure, and particularly relates to a vertical subsurface flow-horizontal subsurface flow artificial wetland structure based on functional fillers and suitable for cold regions.
Background
The artificial wetland is a comprehensive ecological system constructed artificially and operated by maintenance management, and realizes the high-efficiency purification of sewage by utilizing the physical, chemical and biological multiple synergistic effects of interception, adsorption, precipitation, absorption and conversion and the like under the comprehensive action of a biological filter bed consisting of three major elements of substrate, higher aquatic or hygrophyte and microorganism in the system by simulating a natural wetland. Compared with the conventional water treatment technology, the artificial wetland is more suitable for preventing and treating the pollution of water bodies such as rivers and lakes, can treat the water bodies according to local conditions, and recovers the original environment bearing elasticity. The artificial wetland can restore the water body, maintain the balance of an ecological system, improve the surrounding human environment and provide a leisure and entertainment place for residents.
Compared with natural wetland, the artificial wetland has the characteristics of controllability and engineering. The different types of artificial wetlands have different structures and anti-load capacities, so that the operational stability and denitrification effect of the wetlands are influenced. The operating modes and the reoxygenation capacity of the artificial wetland are different, so that the microbial nitrification efficiency and the denitrification efficiency are different. In order to achieve the purpose of design and treatment effect, the artificial wetland system can be divided into a repair type artificial wetland, a re-creation type artificial wetland and a purification type artificial wetland according to different design targets and application ranges. The plant growth system can be classified into a phytoplankton system, an emergent aquatic plant system and a submerged plant system according to the conditions of the root system fixity, the plant growth characteristics and the like of main plants. According to the hydrological characteristics of water flow direction, position, water distribution mode, bed body soaking saturation and the like, the artificial wetland can be divided into a surface flow artificial wetland, a horizontal subsurface flow artificial wetland and a vertical subsurface flow artificial wetland.
The current research on the sewage purification of the artificial wetland has attracted more and more attention, but some aspects still have problems and need to be enhanced. The weather can play a vital role in the artificial wetland sewage treatment technology. The method has the advantages that overwintering and running problems exist in northern cold regions, and the pollutant removal effect is changed along with the change of temperature; the substrate has obvious effect in the artificial wetland, but is easy to cause the blocking condition. Once the substrate is saturated, maintenance is required, or clogging and fouling can occur; wetland has limited capacity to purify high salinity wastewater. The high-salinity wastewater entering the wetland system often leads to the strengthening of plant transpiration and wetland evaporation, and indirectly leads to the non-reduction and the reverse rise of the effluent concentration;
disclosure of Invention
The invention mainly solves the technical problem of providing a composite artificial wetland structure suitable for cold areas, can solve the problem of shutdown caused by easy freezing or blockage of the artificial wetland under the condition of low temperature in the prior art, improves the water body purification efficiency, creates a good landscape zone and saves the occupied area.
In order to solve the technical problems, the invention adopts a technical scheme that: provided is a composite constructed wetland structure suitable for a cold area, comprising: the water distribution tank, the descending vertical artificial wetland unit, the ascending vertical artificial wetland unit, the horizontal subsurface flow wetland and the oxidation pond are combined in a multistage way. The sewage firstly enters the water distribution tank for pretreatment to remove gravel and larger suspended matters. Then flows into a vertical subsurface flow constructed wetland for percolation treatment, then flows through a horizontal subsurface flow wetland, and finally flows into an oxidation pond. The vertical subsurface flow type constructed wetland comprises a bed body and a water distribution pipe, wherein the bed body comprises a layered filling layer, a substrate comprises a soil layer, a slag layer with different grain sizes, a gravel layer, a zeolite layer and a gravel layer from top to bottom in sequence, and a plant combination is planted on the surface of the soil layer. The inner wall of the upper stream of the vertical subsurface flow wetland pool body is provided with a water distribution weir (7), multipoint water distribution is adopted, the bottom of the pool body is provided with a drain pipe and is connected with a hose, and the water level is controlled by adjusting the height of the hose. The invention can effectively solve the problem of shutdown caused by easy freezing or blockage of the artificial wetland under the condition of low temperature in the prior art, improve the water body purification efficiency, build a good landscape zone and save the occupied area.
Preferably, the descending vertical artificial wetland unit and the ascending vertical artificial wetland unit are arranged in parallel, and the single-row bed layer is 5m long, 1.5m wide and 1.5m high. Comprises a bed body and a porous water distribution pipe, wherein the bed body comprises a layered filling layer.
Preferably, the bed body is made of 5mm reinforced concrete with an anti-permeability grade P6, and the interior of the bed body is subjected to anticorrosion treatment by using epoxy paint. The total height of the substrate layered filling layer is 1.0m, and the substrate layered filling layer sequentially comprises a soil layer, slag with the thickness of 50mm and the particle size of 1-3mm, gravel with the thickness of 600mm and the particle size of 2-6mm, zeolite with the thickness of 100mm and the particle size of 6-12mm, and gravel with the thickness of 250mm and the particle size of 8-16mm from top to bottom.
Preferably, the horizontal subsurface flow wetland bed layer is 8m long, 1.5m wide and 1.5m high, and comprises a bed body and a porous water distribution pipe, wherein the bed body comprises a layered filling layer, the total height of the substrate layered filling layer is 0.75m, and the bed body sequentially comprises a soil layer, fine sand and stones with the thickness of 10-20 cm, and a mixture of gravels and zeolites with the porosity of 30% from top to bottom.
Preferably, the soil layer plant combination is emergent aquatic plant reed matched with submerged plant myriophyllum and floating leaf plant water hyacinth.
Preferably, the artificial wetland adopts 50mm horizontal perforated pipes to feed water for water inlet distribution and water outlet collection respectively. Considering the uniformity of water distribution, the water distribution pipe is provided with a plurality of holes, and multi-point water distribution is adopted.
Preferably, the inner wall of the upper stream of the vertical subsurface flow wetland pool body is provided with 1 water distribution weir (7), water is uniformly distributed on the vertical subsurface flow type artificial wetland through a weir crest, a drain pipe is arranged at the bottom of the pool body and connected with a hose, and the water outlet level is controlled by adjusting the height of the hose.
Preferably, in order to prevent the microorganism in the plant root system from depositing and blocking the water distribution pipe, the water distribution pipe is buried in a depth which is far away from the plant root system and is 250mm below the surface of the substrate layer.
Preferably, the radius of the oxidation pond is 6m, EM bacteria are selected, EM stock solution and water are mixed according to the proportion of 1: 10, a carbon source is added, and the mixture is acclimatized into proper EM active solution. The EM active liquid is put into the water at the water level of 800-100L per 700m 2.
The invention has the beneficial effects that: the invention effectively solves the problem of shutdown caused by easy freezing or blockage of the artificial wetland under the low temperature condition in the prior art, improves the water body purification efficiency, creates good wetland landscape environment, saves the occupied area and generates good economic benefit.
Drawings
Fig. 1 is a schematic perspective view of a composite constructed wetland structure suitable for cold areas according to a preferred embodiment of the present invention;
the parts in the drawings are numbered as follows: 1. a water distribution pool; 2. a descending vertical artificial wetland unit; 3. an ascending vertical artificial wetland unit; 4. Horizontal subsurface flow wetland; 5. an oxidation pond; 6. a main water inlet pipe; 7. a water distribution weir; 8. a bed body; 9. a porous water distribution pipe; 10. emerging plants; 11. submerged plants; 12. a leafy plant; 13. a drain pipe; 14. a main water outlet valve; 15. a soil layer; 16. a slag layer; 17. a gravel layer; 18. a zeolite layer; 19. a gravel layer; 20. a porous water distribution pipe; 21. a fine gravel layer; 22. a layer of the mixture.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, the present invention provides a composite artificial wetland structure suitable for a cold area, and the technical problem mainly solved by the present invention is to provide a composite artificial wetland structure suitable for a cold area, which can solve the problem of shutdown caused by easy freezing or blockage of an artificial wetland at a low temperature in the prior art, improve water purification efficiency, create a good landscape zone, and save floor space.
In another embodiment, there is provided a composite constructed wetland structure suitable for cold regions, comprising: the water distribution tank, the descending vertical artificial wetland unit, the ascending vertical artificial wetland unit, the horizontal subsurface flow wetland and the oxidation pond are combined in a multistage way. The sewage firstly enters the water distribution tank for pretreatment to remove gravel and larger suspended matters. Then flows into a vertical subsurface flow constructed wetland for percolation treatment, then flows through a horizontal subsurface flow wetland, and finally flows into an oxidation pond.
The descending vertical artificial wetland unit and the ascending vertical artificial wetland unit are arranged in parallel, and the single-row bed layer is 5m long, 1.5m wide and 1.5m high. Comprises a bed body and a porous water distribution pipe, wherein the bed body comprises a layered filling layer. The bed body is made of 5mm steel concrete and has an anti-permeability grade P6, and the interior of the bed body is subjected to anticorrosion treatment by using epoxy paint. The total height of the substrate layered filling layer is 1.0m, and the substrate layered filling layer sequentially comprises a soil layer, slag with the thickness of 50mm and the particle size of 1-3mm, gravel with the thickness of 600mm and the particle size of 2-6mm, zeolite with the thickness of 100mm and the particle size of 6-12mm, and gravel with the thickness of 250mm and the particle size of 8-16mm from top to bottom.
The horizontal subsurface flow wetland bed layer is 8m in length, 1.5m in width and 1.5m in height, and comprises a bed body and a water distribution pipe, wherein the bed body comprises a layered filling layer, the total height of the matrix layered filling layer is 0.75m, and the bed body sequentially comprises a soil layer, fine sand and stones with the thickness of 10-20 cm, and a mixture of gravels and zeolites with the porosity of 30% from top to bottom.
The soil layer planting plant combination is that emergent aquatic plant reed is matched with submerged plant myriophyllum and floating leaf plant water hyacinth.
The artificial wetland adopts 50mm horizontal perforated pipes to feed water for water inlet distribution and water outlet collection. Considering the uniformity of water distribution, the water distribution pipe is provided with a plurality of holes, and multi-point water distribution is adopted.
The inner wall of the upper stream of the vertical subsurface flow wetland tank body is provided with 1 water distribution weir, the vertical subsurface flow wetland is uniformly distributed with water through a weir crest, the bottom of the tank body is provided with a drain pipe and connected with a hose, and the water level is controlled by adjusting the height of the hose.
In order to prevent microorganisms in the plant root system from depositing and blocking the water distribution pipe, the water distribution pipe is buried in a depth which is far away from the plant root system and is 250mm below the surface of the substrate layer. The radius of the oxidation pond is 6m, EM bacteria is selected, EM stock solution and water are mixed according to the proportion of 1: 10, a carbon source is added, and the mixture is acclimated into proper EM active solution. The EM active liquid is put into the water at the water level of 800-100L per 700m 2.
The invention can effectively solve the problem of shutdown caused by easy freezing or blockage of the artificial wetland under the condition of low temperature in the prior art, improve the water body purification efficiency, build a good landscape zone and save the occupied area.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A composite constructed wetland structure suitable for cold areas is characterized by comprising: the water distribution pool (1), the descending vertical artificial wetland unit (2), the ascending vertical artificial wetland unit (3), the horizontal subsurface flow wetland (4) and the oxidation pond (5) are combined in a multi-stage manner. Sewage firstly enters the water distribution tank (1) through the main water inlet pipe (6) for pretreatment, and gravel and larger suspended matters are removed. Then flows into a vertical subsurface flow constructed wetland for percolation treatment, then flows through a horizontal subsurface flow wetland (4), and finally flows into an oxidation pond (5). And a water distribution weir (7) is arranged on the inner wall of the upstream of the vertical subsurface flow type artificial wetland and comprises the bed body (8) and the porous water distribution pipe (9). The bed body (8) comprises a layered filling layer, a filling layer substrate sequentially comprises a soil layer (15), a slag layer (16) with different grain sizes, a gravel layer (17), a zeolite layer (18) and a gravel layer (19) from top to bottom, and emergent aquatic plants (10), submerged plants (11) and floating-leaf plants (12) are planted on the surface of the soil layer (15). And a drain pipe (13) is arranged at the bottom of the bed body of the vertical undercurrent wetland pool and is connected with a hose, and the water level is controlled by adjusting the height of the hose. The constructed wetland effluent system controls the water yield through a main effluent valve (14) and leads out the effluent purified by the composite constructed wetland. The invention can effectively solve the problem of shutdown caused by easy freezing or blockage of the artificial wetland under the condition of low temperature in the prior art, improve the water body purification efficiency, build a good landscape zone and save the occupied area.
2. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the descending vertical artificial wetland unit (2) and the ascending vertical artificial wetland unit (3) are arranged in parallel, and the single-row bed layer is 5m long, 1.5m wide and 1.5m high.
3. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the bed body (8) is made of 5mm reinforced concrete with an anti-permeability grade P6, and the interior of the bed body is subjected to anticorrosion treatment by using epoxy paint. The total height of the substrate layered filling layer is 1.0m, and the substrate layered filling layer sequentially comprises a soil layer (15), a slag layer (16) with the thickness of 50mm and the particle size of 1-3mm, a gravel layer (17) with the thickness of 600mm and the particle size of 2-6mm, a zeolite layer (18) with the thickness of 100mm and the particle size of 6-12mm, and a gravel layer (19) with the thickness of 250mm and the particle size of 8-16mm from top to bottom.
4. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the horizontal subsurface wetland (4) is 8m long in bed layer, 1.5m wide in bed layer and 1.5m high in bed layer, and comprises a bed body and a porous water distribution pipe (20), wherein the bed body comprises a layered filling layer, the total height of the matrix layered filling layer is 0.75m, and the bed body sequentially comprises a soil layer (8), a fine sand layer (21) with the thickness of 10-20 cm, and a mixture layer (22) of gravel and zeolite with the porosity of 30% from top to bottom.
5. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the plants planted in the soil layer (8) are combination of emergent aquatic plants (11), reeds, submerged plants (12), watermifoil and floating-leaf plants (13), and water hyacinth.
6. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the artificial wetland adopts 50mm horizontal perforated pipes to feed water for water inlet distribution and water outlet collection. Considering the uniformity of water distribution, the water distribution pipe is provided with a plurality of holes, and multi-point water distribution is adopted.
7. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the upper stream of the vertical subsurface flow wetland pool body is provided with 1 water distribution weir (7), and water is uniformly distributed to the vertical subsurface flow type artificial wetland through a weir crest.
8. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: in order to prevent the microorganism in the plant root system from depositing and blocking the water distribution pipe, the porous water distribution pipe (13) is buried in a depth which is far away from the plant root system and is 250mm below the surface of the substrate layer.
9. The composite constructed wetland structure suitable for cold areas according to claim 1, characterized in that: the radius of the oxidation pond is 6m, EM bacteria is selected, EM stock solution and water are mixed according to the proportion of 1: 10, a carbon source is added, and the mixture is acclimated into proper EM active solution. The EM active liquid is put into the water at the water level of 800-100L per 700m 2.
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| CN202110096051.9A CN112897813A (en) | 2021-01-25 | 2021-01-25 | Composite artificial wetland structure suitable for cold area |
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| CN202110096051.9A CN112897813A (en) | 2021-01-25 | 2021-01-25 | Composite artificial wetland structure suitable for cold area |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091160A2 (en) * | 2002-04-26 | 2003-11-06 | The Indian Institute Of Technology, Bombay | Process for treatment of organic wastes |
| KR100944122B1 (en) * | 2008-12-03 | 2010-02-24 | 신강하이텍(주) | Constructed wetlands treating base flow irrigational return flow and storm water |
| CN206635115U (en) * | 2017-03-14 | 2017-11-14 | 宁波市华测检测技术有限公司 | A kind of compound flow constructed wetland sewage disposal system |
| CN107892446A (en) * | 2017-12-20 | 2018-04-10 | 中国海洋大学 | Continuum micromeehanics regulating level vertical subsurface flow wetland device |
| CN208916918U (en) * | 2018-09-20 | 2019-05-31 | 湖南先导洋湖再生水有限公司 | It is a kind of for building the artificial wet land system of bird community |
| CN110835165A (en) * | 2019-11-27 | 2020-02-25 | 河海大学 | Micro-polluted water body ecological purification system suitable for riverway type water source area |
| CN111018266A (en) * | 2019-12-31 | 2020-04-17 | 华南理工大学 | Landscape type modularized biological carbon multistage artificial wetland automatic treatment system |
-
2021
- 2021-01-25 CN CN202110096051.9A patent/CN112897813A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091160A2 (en) * | 2002-04-26 | 2003-11-06 | The Indian Institute Of Technology, Bombay | Process for treatment of organic wastes |
| KR100944122B1 (en) * | 2008-12-03 | 2010-02-24 | 신강하이텍(주) | Constructed wetlands treating base flow irrigational return flow and storm water |
| CN206635115U (en) * | 2017-03-14 | 2017-11-14 | 宁波市华测检测技术有限公司 | A kind of compound flow constructed wetland sewage disposal system |
| CN107892446A (en) * | 2017-12-20 | 2018-04-10 | 中国海洋大学 | Continuum micromeehanics regulating level vertical subsurface flow wetland device |
| CN208916918U (en) * | 2018-09-20 | 2019-05-31 | 湖南先导洋湖再生水有限公司 | It is a kind of for building the artificial wet land system of bird community |
| CN110835165A (en) * | 2019-11-27 | 2020-02-25 | 河海大学 | Micro-polluted water body ecological purification system suitable for riverway type water source area |
| CN111018266A (en) * | 2019-12-31 | 2020-04-17 | 华南理工大学 | Landscape type modularized biological carbon multistage artificial wetland automatic treatment system |
Non-Patent Citations (2)
| Title |
|---|
| 丘好华: "人工湿地及其在生活污水氮磷去除方面的应用分析", 《节能与环保》 * |
| 吕炳南等: "《污水生物处理新技术》", 30 September 2007, 哈尔滨工业大学出版社 * |
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