CN105036345A - Enhanced nitrogen and phosphorus removal integrated constructed wetland system - Google Patents
Enhanced nitrogen and phosphorus removal integrated constructed wetland system Download PDFInfo
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- CN105036345A CN105036345A CN201510404302.XA CN201510404302A CN105036345A CN 105036345 A CN105036345 A CN 105036345A CN 201510404302 A CN201510404302 A CN 201510404302A CN 105036345 A CN105036345 A CN 105036345A
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- 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
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- 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
Abstract
The invention discloses an enhanced nitrogen and phosphorous removal integrated constructed wetland system. The system is a surface flow wetland, and comprises an emergent aquatic plant wetland (1) and a submerged plant wetland (2) which are sequentially arranged along the water flow direction, wherein the emergent aquatic plant wetland (1) comprises an enhanced nitrogen removal medium layer and a shallow-water surface (3) arranged at the upper part of the enhanced nitrogen removal medium layer; emergent aquatic plants (4) are planted in the enhanced nitrogen removal medium layer; the submerged plant wetland (4) comprises an enhanced phosphorous removal medium layer and a deep-water layer (6) arranged at the upper part of the enhanced phosphorous removal medium layer; and submerged plants (5) are planted in the enhanced phosphorous removal medium layer. The enhanced nitrogen and phosphorous removal integrated constructed wetland system can be used for realizing sewage treatment synchronously, efficiently and economically.
Description
Technical field
The present invention relates to water pollution control and restoration of the ecosystem FIELD OF THE INVENTIONThe, particularly relate to a kind of intensified denitrification and dephosphorization integrated constructed wetland system.
Background technology
At present, the body eutrophication that nitrogen, the excessive input of phosphorus cause is one of subject matter of Water Environment In Lakes.Along with the raising of wastewater treatment rate and processing horizontal, the low-pollution water of qualified discharge is more and more outstanding to Water Environment In Lakes pollution load.Although in these low-pollution waters, the content of nitrogen and phosphorous is most of can reach national water quality emission standard, but still exceed more than quality standard for surface water several times, even decades of times, and this kind of low-pollution water water yield is large, it directly discharges and forms larger threat to lake natural water body, needs badly and processes.
In low-pollution water, the low-pollution water of the low ratio of carbon to ammonium such as sewage treatment plant tail water, agricultural run-off receives more concern, and sewage treatment plant tail water is after biochemical treatment, and carbon, nitrogen are reduced to 2.5-3 scope than; In agricultural run-off, equally also content is lower for organic carbon source.Therefore, the low-pollution water process of low ratio of carbon to ammonium has become the bottleneck problem of improvement.
Artificial marsh sewage treatment system is a comprehensive ecological wastewater treatment system, have anti impulsion load, stable effluent quality, capital construction working cost low, be easy to the advantages such as maintenance, usually for the treatment of low-pollution water.But, when processing the low-pollution water of low ratio of carbon to ammonium nitrogen and phosphorus pollution, still there is organic carbon source deficiency and causing the problems such as Microbial denitrogenation weak effect, the filler loading capacity to phosphorus is low.
For strengthening the denitrogenation of low C/N than sewage, take the mode of additional carbon more, the carbon source adopted mainly is divided into the large class of traditional liquid carbon source, biodegradable polymer carbon source, natural phant carbon source 3, and wherein natural phant carbon source is employed gradually because it is cheap and easy to get, simple to operate.But, utilize natural phant carbon source to there are some problems equally, as the reduction of carbon source controllability, effluent quality easily have residual carbon source, colourity higher.To this, some have researched and proposed optimized Measures, as straw soak solution is hydrolyzed plant carbon source hydrolyzed solution adds to artificial swamp, to improve denitrification denitrogenation effect and stability by patent CN103936161A; Patent CN104291445A utilizes plant carbon source and sulfur granule, uses, plant carbon source heterotrophism and the coupling of sulphur autotrophic denitrification to improve the controllability of plant carbon source dispose procedure.But these measures also make wet land system complicated, cost increases.
For the removal of phosphorus in enhanced sewage, take novel wetland filler (zeolite, slag, haydite, waterworks sludge etc.) to replace the mode of traditional wet land filler (soil, sand, gravel etc.) more, wherein water supply plant waste sludge because its iron aluminium content is high, phosphorus high adsorption capacity and being concerned gradually.Current research focuses mostly on and is applied to the higher wastewater treatment of pollution, as patent CN103880193A discloses the method building vertical current constructed wetland process breeding wastewater based on waterworks sludge; Patent CN103408094A relates to a kind of method etc. that reuse water supply plant waste sludge removes phosphorus in town sewage, and the process being applied to low-pollution water as can be seen here can obtain more preferably effect.In addition have research to point out, be used alone water supply plant refuse mud do filler exist be unfavorable for the problem that wetland plant grows.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of intensified denitrification and dephosphorization integrated constructed wetland system, realizes synchronous, efficient, economic sewage disposal.
A kind of intensified denitrification and dephosphorization integrated constructed wetland system, it is free water surface wetland, comprise the emergent wetland and submerged plant wetland that set gradually along water (flow) direction, described emergent wetland comprises the shoaling layer on strengthened denitrification medium layer and its top, described strengthened denitrification medium layer is planted and is implanted with emergent; Described submerged plant wetland comprises the profundal zone on reinforced phosphor-removing medium layer and its top, described reinforced phosphor-removing medium layer is planted and is implanted with submerged plant.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, described strengthened denitrification medium layer is disposed with denitrogenation pre-treatment district and denitrogenation post processing zone along water (flow) direction, described denitrogenation pre-treatment district is made up of the plant carbon source packing layer of bottom and the pedosphere on top, and described denitrogenation post processing zone is filled by soil and formed; Described reinforced phosphor-removing medium layer is disposed with dephosphorization pre-treatment district and dephosphorization post processing zone along water (flow) direction, and described dephosphorization pre-treatment district is filled with the mixture of red soil and water supply plant waste sludge, and described dephosphorization post processing zone is filled with red soil; The area ratio of described emergent wetland and described submerged plant wetland is 1:1-1:4.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, described emergent wetland front end arranges cloth water channel and overflow weir, and the front end of described cloth water channel is provided with water inlet; Water in described cloth water channel enters described emergent wetland by described overflow weir; Described submerged plant wetland is fallen in the water outlet of described emergent wetland, and elevation of water surface difference is 0-20cm; The top of described submerged plant wetland is provided with water outlet.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, plant carbon source filler in described plant carbon source packing layer is broken section of the emergent stem stalk of described system plantation, carries out following pre-treatment: plant haulm natural air drying, make its water ratio lower than 10% before filling; Break process is carried out to the plant haulm after air-dry, plant haulm is centrally axially cut open, then through transversely cutting, form broken section that length is 2-10cm.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, the thickness of described plant carbon source packing layer is 10-20cm, and described edaphic thickness is 5-25cm; The cross-sectional area of described denitrogenation pre-treatment district and described denitrogenation post processing zone is than being 1:3-1:2; Described emergent is the one in reed, giantreed, cattail and Spiked Loosestrife, and planting density is 10-20 strain/m
2; The degree of depth of described shoaling layer is 0-30cm.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, the thickness of described reinforced phosphor-removing medium layer is 10-20cm, and described dephosphorization pre-treatment district is 1:1-1:10 with the cross-sectional area ratio of dephosphorization post processing zone.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, red soil and water supply plant waste sludge 1:1-5:1 Homogeneous phase mixing in mass ratio in described dephosphorization pre-treatment district; Fe in described red soil
2o
3mass percent be greater than 10%; Described water supply plant waste sludge is the mud that the water supply plant being flocculation agent with aluminium salt produces, wherein Al
2o
3content is 6%-20%.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, the degree of depth of described profundal zone is 50-80cm; Described submerged plant is the one in hornwort, eel grass, watermifoil, Potamogeton pectinatus L, and planting density is 9-25 strain/m
2.
Intensified denitrification and dephosphorization integrated constructed wetland system of the present invention, wherein, the hydraulic load of described emergent wetland and described submerged plant wetland is respectively 0.05-0.5m
3/ m
2d and 0.02-0.2m
3/ m
2d.
Intensified denitrification and dephosphorization integrated constructed wetland system difference from prior art of the present invention is: intensified denitrification and dephosphorization integrated constructed wetland system of the present invention overcomes the defect in background technology, denitrogenation is combined with the enhancements of dephosphorization, there is provided a kind of intensified denitrification and dephosphorization integrated constructed wetland system, by emergent wetland and the series operation of submerged plant wetland.Emergent wetland front end arranges strengthened denitrification district, broken section of the emergent stem stalk carbon source as a supplement utilizing wetland self to plant, and strengthens denitrification denitrogenation effect; The non-carbon source additional area of rear end can be degraded the remaining carbon source of front end further; Submerged plant wetland front end arranges reinforced phosphor-removing district, water supply plant waste sludge is mixed as filler with red soil, take into account phosphor-removing effect and wetland plant growing way, and submerged plant significantly can reduce water turbidity and stop sedimental settling flux simultaneously, ensure that effluent quality is limpid.
The present invention also has following beneficial effect:
1. carbon source, water supply plant waste sludge are as strengthening filler as a supplement for the emergent adopting wetland self to plant, with low cost, achieve the recycling of refuse simultaneously.
2. the C/N enduring the plant such as reed, cattail that meadow bog is selected is higher, suitable to plant carbon source, ensures the removal effect of nitrogen.
3. wet land system structure is simple, simple operation, adjusts the adding proportion of plant carbon source and water supply plant waste sludge, meet the requirement of effluent quality according to nitrogen and phosphorus pollution degree.
4. by strengthened denitrification district and the reinforced phosphor-removing district of structure, to low ratio of carbon to ammonium and the low-pollution water of nitrogen and phosphorus pollution has ideal synchronous processing effect, water outlet nitrogen, phosphorus index can reach " water environment quality standard " (GB3838-2002) IV class.
Below in conjunction with accompanying drawing, intensified denitrification and dephosphorization integrated constructed wetland system of the present invention is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of intensified denitrification and dephosphorization integrated constructed wetland system of the present invention.
Wherein, (1) emergent wetland, (2) submerged plant wetland, (3) shoaling layer, (4) emergent, (5) submerged plant, (6) profundal zone, (7) denitrogenation post processing zone, (8) plant carbon source packing layer, (9) pedosphere, (10) dephosphorization pre-treatment district, (11) dephosphorization post processing zone, (12) cloth water channel, (13) overflow weir, (14) water inlet, (15) water outlet.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of intensified denitrification and dephosphorization integrated constructed wetland system, comprises emergent wetland 1 and submerged plant wetland 2 successively along water (flow) direction.
Described emergent wetland 1 is followed successively by along water (flow) direction the shoaling layer 3 that described emergent wetland 1 comprises strengthened denitrification medium layer and its top, strengthened denitrification medium layer comprises denitrogenation pre-treatment district and denitrogenation post processing zone 7, the pedosphere 9 of described denitrogenation pre-treatment district comprises below thickness to be the plant carbon source packing layer 8 of 15cm and top thickness be 20m; Denitrogenation post processing zone 7 is filled by soil and is formed; The area ratio of denitrogenation pre-treatment district and denitrogenation post processing zone is 1:3.Strengthened denitrification medium layer is planted and is implanted with emergent 4, be reed or giantreed, planting density is 10-20 strain/m
2.Emergent wetland available depth is 10cm (i.e. the degree of depth of shoaling layer 3).
Described emergent wetland 1 front end arranges cloth water channel 12 and overflow weir 13, and the front end of described cloth water channel 12 is provided with water inlet 14; Water in described cloth water channel 12 enters described emergent wetland 1 by described overflow weir 13; Described submerged plant wetland 2 is fallen in the water outlet of described emergent wetland 1, and elevation of water surface difference is 0-20cm; The top of described submerged plant wetland 2 is provided with water outlet 15.
Broken section of the stem stalk of the emergent 4 that described plant carbon source filler 8 is planted for this wet land system, carries out following pre-treatment before filling: 1) plant haulm natural air drying, makes its water ratio lower than 10%; 2) break process is carried out to the plant haulm after air-dry, plant haulm is centrally axially cut open, then through transversely cutting, form broken section that length is 2-10cm.
Described submerged plant wetland 2 is made up of the profundal zone 6 on reinforced phosphor-removing medium layer and its top, and reinforced phosphor-removing medium layer is disposed with dephosphorization pre-treatment district 10 and dephosphorization post processing zone 11 along water (flow) direction, and reinforced phosphor-removing thickness of dielectric layers is 15cm; Dephosphorization pre-treatment district 10 is the mixture of red soil and water supply plant waste sludge; Dephosphorization post processing zone 11 is red soil; Dephosphorization pre-treatment district 10 is 1:3 with the area ratio of dephosphorization post processing zone 11.Submerged plant 5 is hornwort, and planting density is 9-25 strain/m
2.Described submerged plant wetland 2 available depth is 60cm (i.e. the degree of depth of profundal zone 6).
Red soil and water supply plant waste sludge 3:1 Homogeneous phase mixing in mass ratio in dephosphorization pre-treatment district 10; Fe in red soil
2o
3mass percent be 12.3%; Water supply plant waste sludge is the mud that the water supply plant being flocculation agent with aluminium salt produces, wherein Al
2o
3content is 8.2%.
The artificial wet land system of this example is adopted to carry out sewage disposal.Water inlet is simulated farmland water-break, and with tap water configuration, total nitrogen concentration is 4.52mg/L, and nitrate nitrogen concentration is 4.13mg/L, and total phosphorus concentration is 1.15mg/L.The hydraulic load of emergent wetland and submerged plant wetland is respectively 0.08m
3/ m
2d and 0.04m
3/ m
2d.After wet land system process, in sewage, nitrogen removal rate is 69.5%, and nitrate nitrogen clearance is 60.6%, and total tp removal rate is 89.7%.As can be seen here, this artificial wet land system is applicable to low C/N ratio, has the low-pollution water process of nitrogen and phosphorus pollution, Nitrogen/Phosphorus Removal is desirable, and effluent quality is good, and nitrogen, phosphorus index all can reach " water environment quality standard " (GB3838-2002) IV class level.
Embodiment 2
As shown in Figure 1, a kind of intensified denitrification and dephosphorization integrated constructed wetland system, it is free water surface wetland, comprise the emergent wetland 1 and submerged plant wetland 2 that set gradually along water (flow) direction, emergent wetland 1 comprises the shoaling layer 3 on strengthened denitrification medium layer and its top, strengthened denitrification medium layer is planted and is implanted with emergent 4; Submerged plant wetland comprises the profundal zone 6 on reinforced phosphor-removing medium layer and its top, reinforced phosphor-removing medium layer is planted and is implanted with submerged plant 5.
Strengthened denitrification medium layer is disposed with denitrogenation pre-treatment district and denitrogenation post processing zone 7 along water (flow) direction, and denitrogenation pre-treatment district is made up of the plant carbon source packing layer 8 of bottom and the pedosphere 9 on top, and denitrogenation post processing zone 7 is filled by soil and formed; Reinforced phosphor-removing medium layer is disposed with dephosphorization pre-treatment district 10 and dephosphorization post processing zone 11 along water (flow) direction, and dephosphorization pre-treatment district 10 is filled with the mixture of red soil and water supply plant waste sludge, and dephosphorization post processing zone 11 is filled with red soil; The area ratio of emergent wetland 1 and submerged plant wetland 2 is 1:1.
Emergent wetland 1 front end arranges cloth water channel 12 and overflow weir 13, and the front end of cloth water channel 12 is provided with water inlet 14; Water in cloth water channel 12 enters emergent wetland 1 by overflow weir 13; Submerged plant wetland 2 is fallen in the water outlet of emergent wetland 1, and elevation of water surface is equal; The top of submerged plant wetland 2 is provided with water outlet 15.
Plant carbon source filler in plant carbon source packing layer 8 is broken section of the emergent stem stalk of system plantation, carries out following pre-treatment: plant haulm natural air drying, make its water ratio lower than 10% before filling; Break process is carried out to the plant haulm after air-dry, plant haulm is centrally axially cut open, then through transversely cutting, form broken section that length is 2-10cm.
The thickness of plant carbon source packing layer 8 is 10cm, and the thickness of pedosphere 9 is 5cm; The cross-sectional area of denitrogenation pre-treatment district and denitrogenation post processing zone 7 is than being 1:3; Emergent 4 is the one in reed, giantreed, cattail and Spiked Loosestrife, and planting density is 10 strains/m
2; The degree of depth of shoaling layer 3 is 1cm.The thickness of reinforced phosphor-removing medium layer is 10cm, and dephosphorization pre-treatment district 10 is 1:1 with the cross-sectional area ratio of dephosphorization post processing zone 11.Red soil and water supply plant waste sludge 1:1 Homogeneous phase mixing in mass ratio in dephosphorization pre-treatment district 10; Fe in red soil
2o
3mass percent be greater than 10%; Water supply plant waste sludge be the mud that the water supply plant being flocculation agent with aluminium salt produces, wherein Al
2o
3content is 6%.The degree of depth of profundal zone 6 is 50cm; Submerged plant 5 is the one in hornwort, eel grass, watermifoil, Potamogeton pectinatus L, and planting density is 9 strains/m
2.Emergent wetland 1 is respectively 0.05m with the hydraulic load of submerged plant wetland 2
3/ m
2d and 0.02m
3/ m
2d.
Embodiment 3
As shown in Figure 1, a kind of intensified denitrification and dephosphorization integrated constructed wetland system, it is free water surface wetland, comprise the emergent wetland 1 and submerged plant wetland 2 that set gradually along water (flow) direction, emergent wetland 1 comprises the shoaling layer 3 on strengthened denitrification medium layer and its top, strengthened denitrification medium layer is planted and is implanted with emergent 4; Submerged plant wetland comprises the profundal zone 6 on reinforced phosphor-removing medium layer and its top, reinforced phosphor-removing medium layer is planted and is implanted with submerged plant 5.
Strengthened denitrification medium layer is disposed with denitrogenation pre-treatment district and denitrogenation post processing zone 7 along water (flow) direction, and denitrogenation pre-treatment district is made up of the plant carbon source packing layer 8 of bottom and the pedosphere 9 on top, and denitrogenation post processing zone 7 is filled by soil and formed; Reinforced phosphor-removing medium layer is disposed with dephosphorization pre-treatment district 10 and dephosphorization post processing zone 11 along water (flow) direction, and dephosphorization pre-treatment district 10 is filled with the mixture of red soil and water supply plant waste sludge, and dephosphorization post processing zone 11 is filled with red soil; The area ratio of emergent wetland 1 and submerged plant wetland 2 is 1:4.
Emergent wetland 1 front end arranges cloth water channel 12 and overflow weir 13, and the front end of cloth water channel 12 is provided with water inlet 14; Water in cloth water channel 12 enters emergent wetland 1 by overflow weir 13; Submerged plant wetland 2 is fallen in the water outlet of emergent wetland 1, and elevation of water surface difference is 20cm; The top of submerged plant wetland 2 is provided with water outlet 15.
Plant carbon source filler in plant carbon source packing layer 8 is broken section of the emergent stem stalk of system plantation, carries out following pre-treatment: plant haulm natural air drying, make its water ratio lower than 10% before filling; Break process is carried out to the plant haulm after air-dry, plant haulm is centrally axially cut open, then through transversely cutting, form broken section that length is 2-10cm.
The thickness of plant carbon source packing layer 8 is 20cm, and the thickness of pedosphere 9 is 25cm; The cross-sectional area of denitrogenation pre-treatment district and denitrogenation post processing zone 7 is than being 1:2; Emergent 4 is the one in reed, giantreed, cattail and Spiked Loosestrife, and planting density is 20 strains/m
2; The degree of depth of shoaling layer 3 is 30cm.The thickness of reinforced phosphor-removing medium layer is 20cm, and dephosphorization pre-treatment district 10 is 1:10 with the cross-sectional area ratio of dephosphorization post processing zone 11.Red soil and water supply plant waste sludge 5:1 Homogeneous phase mixing in mass ratio in dephosphorization pre-treatment district 10; Fe in red soil
2o
3mass percent be greater than 10%; Water supply plant waste sludge is the mud that the water supply plant being flocculation agent with aluminium salt produces, wherein Al
2o
3content is 20%.The degree of depth of profundal zone 6 is 80cm; Submerged plant 5 is the one in hornwort, eel grass, watermifoil, Potamogeton pectinatus L, and planting density is 25 strains/m
2.Emergent wetland 1 is respectively 0.5m with the hydraulic load of submerged plant wetland 2
3/ m
2d and 0.2m
3/ m
2d.
The result of use of embodiment 2 and 3 is verified, obtains the test-results similar to embodiment 1.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (9)
1. an intensified denitrification and dephosphorization integrated constructed wetland system, it is characterized in that: it is free water surface wetland, comprise the emergent wetland (1) and submerged plant wetland (2) that set gradually along water (flow) direction, described emergent wetland (1) comprises the shoaling layer (3) on strengthened denitrification medium layer and its top, described strengthened denitrification medium layer is planted and is implanted with emergent (4); Described submerged plant wetland comprises the profundal zone (6) on reinforced phosphor-removing medium layer and its top, described reinforced phosphor-removing medium layer is planted and is implanted with submerged plant (5).
2. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 1, it is characterized in that: described strengthened denitrification medium layer is disposed with denitrogenation pre-treatment district and denitrogenation post processing zone (7) along water (flow) direction, described denitrogenation pre-treatment district is made up of the plant carbon source packing layer (8) of bottom and the pedosphere (9) on top, and described denitrogenation post processing zone (7) is filled by soil and formed; Described reinforced phosphor-removing medium layer is disposed with dephosphorization pre-treatment district (10) and dephosphorization post processing zone (11) along water (flow) direction, described dephosphorization pre-treatment district (10) is filled with the mixture of red soil and water supply plant waste sludge, and described dephosphorization post processing zone (11) is filled with red soil; The area ratio of described emergent wetland (1) and described submerged plant wetland (2) is 1:1-1:4.
3. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 2, it is characterized in that: described emergent wetland (1) front end arranges cloth water channel (12) and overflow weir (13), and the front end of described cloth water channel (12) is provided with water inlet (14); Water in described cloth water channel (12) enters described emergent wetland (1) by described overflow weir (13); Described submerged plant wetland (2) is fallen in the water outlet of described emergent wetland (1), and elevation of water surface difference is 0-20cm; The top of described submerged plant wetland (2) is provided with water outlet (15).
4. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 2, it is characterized in that: the plant carbon source filler in described plant carbon source packing layer (8) is broken section of the emergent stem stalk of described system plantation, carry out following pre-treatment before filling: plant haulm natural air drying, make its water ratio lower than 10%; Break process is carried out to the plant haulm after air-dry, plant haulm is centrally axially cut open, then through transversely cutting, form broken section that length is 2-10cm.
5. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 3, is characterized in that: the thickness of described plant carbon source packing layer (8) is 10-20cm, and the thickness of described pedosphere (9) is 5-25cm; The cross-sectional area of described denitrogenation pre-treatment district and described denitrogenation post processing zone (7) is than being 1:3-1:2; Described emergent (4) is reed, giantreed, one in cattail and Spiked Loosestrife, planting density is 10-20 strain/m
2; The degree of depth of described shoaling layer (3) is 0-30cm.
6. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 5, it is characterized in that: the thickness of described reinforced phosphor-removing medium layer is 10-20cm, described dephosphorization pre-treatment district (10) is 1:1-1:10 with the cross-sectional area ratio of dephosphorization post processing zone (11).
7. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 6, is characterized in that: red soil and water supply plant waste sludge 1:1-5:1 Homogeneous phase mixing in mass ratio in described dephosphorization pre-treatment district (10); Fe in described red soil
2o
3mass percent be greater than 10%; Described water supply plant waste sludge is the mud that the water supply plant being flocculation agent with aluminium salt produces, wherein Al
2o
3content is 6%-20%.
8. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 7, is characterized in that: the degree of depth of described profundal zone (6) is 50-80cm; Described submerged plant (5) is hornwort, eel grass, watermifoil, one in Potamogeton pectinatus L, planting density is 9-25 strain/m
2.
9. intensified denitrification and dephosphorization integrated constructed wetland system according to claim 8, is characterized in that: described emergent wetland (1) is respectively 0.05-0.5m with the hydraulic load of described submerged plant wetland (2)
3/ m
2d and 0.02-0.2m
3/ m
2d.
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| CN109081446A (en) * | 2018-08-16 | 2018-12-25 | 江苏龙腾工程设计股份有限公司 | A kind of the compounded mix artificial swamp and sewage water treatment method of denitrogenation dephosphorizing |
| CN110316918A (en) * | 2019-07-02 | 2019-10-11 | 成都理工大学 | A kind of combined remediation method of in-situ control Sediments phosphorus release |
| CN112299558A (en) * | 2019-07-29 | 2021-02-02 | 中国环境科学研究院 | Efficient integrated rural sewage treatment device and sewage treatment method |
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| CN203440156U (en) * | 2013-07-19 | 2014-02-19 | 马鞍山十七冶工程科技有限责任公司 | Grey water treatment device using matrix-reinforced composite-flow constructed wetland for residence community |
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| CN107473388B (en) * | 2017-08-29 | 2020-10-16 | 南昌工程学院 | Enhanced nitrogen and phosphorus removal integrated artificial wetland system and sewage treatment method thereof |
| CN109081446A (en) * | 2018-08-16 | 2018-12-25 | 江苏龙腾工程设计股份有限公司 | A kind of the compounded mix artificial swamp and sewage water treatment method of denitrogenation dephosphorizing |
| CN110316918A (en) * | 2019-07-02 | 2019-10-11 | 成都理工大学 | A kind of combined remediation method of in-situ control Sediments phosphorus release |
| CN112299558A (en) * | 2019-07-29 | 2021-02-02 | 中国环境科学研究院 | Efficient integrated rural sewage treatment device and sewage treatment method |
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