CN102173535A - Method and system for improving denitrification efficiency of underflow artificial wetlands - Google Patents
Method and system for improving denitrification efficiency of underflow artificial wetlands Download PDFInfo
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- CN102173535A CN102173535A CN2011100539367A CN201110053936A CN102173535A CN 102173535 A CN102173535 A CN 102173535A CN 2011100539367 A CN2011100539367 A CN 2011100539367A CN 201110053936 A CN201110053936 A CN 201110053936A CN 102173535 A CN102173535 A CN 102173535A
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Abstract
The invention relates to a method and a system for improving the denitrification efficiency of underflow artificial wetlands. The system comprises a grating well 1, an anaerobic hydrolytic pond 2, a filter unit 6, a micro-aeration oxygenating unit 7, a primary artificial wetland 3, a carbon source replenishing pond 8, a secondary artificial wetland 4, a carbon source replenishing pond 9 and a third artificial wetland 5 which are connected in series with one another. By the system, a carbon nitrogen ratio of sewage can be improved, the denitrification efficiency of the sewage can be improved, and the sewage can be treated at high efficiency. The method and the system have the advantages of low investment cost and operating cost, high impact load resistance, convenience of maintenance and management and the like.
Description
One, technical field
The present invention relates to a kind of sewage water treatment method and system thereof, specifically a kind of method and system thereof that improves the underflow type artificial wet land nitric efficiency.
Two, background technology
Artificial swamp has obtained promotion and application widely as a kind of sewage disposal technology in the whole world, energy consumption is low, low to management expectancy in the artificial swamp operational process.Since West Germany built up first artificial swamp in 1974, artificial swamp had obtained development rapidly in the eighties in 20th century.According to statistics, have 174 artificial swamps the seventies in North America to 20 century, and to 2006, Europe had more than 10000 artificial swamp, and there are nearly 20000 artificial swamps the North America.Domestic artificial swamp research is started late; since late 1980s; successively in Tianjin, Changping, Beijing, Shenzhen, Chengdu and Shanghai built the artificial swamp sewage treatment project; since these artificial swamp operations; produced good economic and social benefit, for contribution has been made in environment protection.
According to the difference of water flow mode, artificial swamp can be divided into surface current artificial wetland, horizontal drowned flow artificial wet land, vertical subsurface flow wetland.Than horizontal drowned flow and vertical subsurface flow wetland, though the surface current artificial wetland has advantages such as reduced investment, working cost be low, easy and simple to handle, but shortcomings such as load is low, soil removability is limited are arranged also, and it is bigger that surface current artificial wetland's operation is influenced by natural climate condition, easily grow mosquitos and flies summer, produce stink and influence environment around the wetland; Advantages such as drowned flow artificial wet land is few owing to floor space, treatment effect good, sanitary condition is good receive increasing concern.In general, drowned flow artificial wet land is fine to the place to go effect of the SS in the waste water, COD and BOD, but drowned flow artificial wet land is not very good to the effect of denitrogenation of waste water, there is data to show, drowned flow artificial wet land has only 30%-40% to the place to go rate of ammonia nitrogen, 268 drowned flow artificial wet land investigation results of just moving to European actual motion show that its average removal rate to ammonia nitrogen has only 30%.Nitrogen and phosphorus pollution is the major cause that causes body eutrophication, if can not make a breakthrough in that sewage water denitrification is technical, this class The Application of Technology prospect will inevitably be restricted.Therefore, the method for exploitation raising underflow type artificial wet land nitric efficiency and system thereof pollute, improve the ecological environment significant to solution water.
Three, summary of the invention
It is low to the present invention is directed to present drowned flow artificial wet land nitric efficiency, problems such as the sewage carbon-nitrogen ratio is lower aim to provide a kind of method and system thereof that improves the underflow type artificial wet land nitric efficiency, and technical problem to be solved is to improve the carbon-nitrogen ratio of sewage, simultaneously, improve the nitric efficiency of sewage.
This treatment process comprises placed in-line grille well 1, anaerobic fixed film reactor 2, filtering unit 6, little aeration aerating unit 7, one-level artificial swamp 3, the additional pond 8 of carbon source, secondary artificial swamp 4, carbon source additional pond 9, little aeration aerating unit 7 and three grades of artificial swamps 5.Difference with the prior art is that sewage level has potential difference 0.5-0.8m between grille well 1, anaerobic fixed film reactor 2, one-level artificial swamp 3, secondary artificial swamp 4 and the three grades of artificial swamps 5, at one-level artificial swamp 3 front ends filtering unit 6 and little aeration aerating unit 7 are set, at secondary artificial swamp 4 front ends carbon source is set and replenishes pond 8, at three grades of artificial swamp 5 front ends carbon source is set and replenishes pond 9 and little aeration aerating unit 7.
In the described grille well 1 the twice grid is set, one coarse rack 10 is with fine fack 11, and the grid spacing of coarse rack 10 is 10-15mm, and the grid spacing of fine fack 11 is 5-10mm.The angle that is provided with of coarse rack 10 and fine fack 11 is 60 degree.
Soft biologic packing material 12 is set in the described anaerobic fixed film reactor 2, and soft biologic packing material 12 lies on the filler support 13, and S shape flow deflector 14 is set in the anaerobic fixed film reactor 2.
Described one-level artificial swamp 3 is a horizontal drowned flow formula artificial swamp, and one-level artificial swamp 3 front ends are provided with filtering unit 6 and little aeration aerating unit 7.One-level artificial swamp 3 interior fillers kind from bottom to top are gravel 15, zeolite 16 and green stone 17, and depth of packing is gravel 200mm, zeolite 400mm and the sub-300mm of green stone; Packing material size is gravel 50-100mm, zeolite 10-15mm and the sub-5-10mm of green stone.Plantation reed 21 in the one-level artificial swamp 3, reed planting degree of depth 30-40cm, spacing in the rows 30-40cm, water surface total height is 85cm.In little aeration aerating unit 7 microporous aeration device 18 is set, arranges 4/m of density
2, microporous aeration device adopts air compressor 19 air feed, and air demand is 1m
3/ min.Four layers of filter packing are set in the filtering unit 6, water (flow) direction from bottom to top, filler kind from bottom to top is gravel 15 and three grades of grating quartz sands 20, depth of packing is gravel 200mm, grating quartz sand 600mm; Packing material size is gravel 50-100mm, grating quartz sand particle size 15-20mm (thickness 20cm), grating quartz sand particle size 10-15mm (thickness 20cm), grating quartz sand particle size 5-10mm (thickness 20cm).
Described secondary artificial swamp 4 is a horizontal drowned flow formula artificial swamp, and secondary artificial swamp 4 front ends are provided with carbon source and replenish pond 8, and carbon source is replenished and adopted corn cob 21 carbon source as a supplement in the pond 8.Secondary artificial swamp 4 interior fillers kind from bottom to top are gravel 15, zeolite 16 and green stone 17, and depth of packing is gravel 200mm, zeolite 400mm and the sub-300mm of green stone; Packing material size is gravel 50-100mm, zeolite 10-15mm and the sub-5-10mm of green stone.Plantation reed in the secondary artificial swamp 4, reed planting degree of depth 30-40cm, spacing in the rows 30-40cm, water surface total height is 85cm.
Described three grades of artificial swamps 5 are the surface current artificial wetland, and three grades of artificial swamp 5 front ends are provided with carbon source and replenish pond 9 and little aeration aerating unit 7, and carbon source is replenished and adopted maize straw 22 carbon source as a supplement in the pond 9.In three grades of artificial swamps 5 fillers from bottom to top kind be gravel 15, zeolite 16 and green stone 17, depth of packing is gravel 100mm, zeolite 200mm and the sub-200mm of green stone; Packing material size is gravel 50-80mm, zeolite 8-10mm and the sub-5-10mm of green stone.Plantation reed in three grades of artificial swamps 5, reed planting degree of depth 30-40cm, spacing in the rows 30-40cm.Water surface total height is 80cm in three grades of artificial swamps 5.In little aeration aerating unit 7 microporous aeration device 18 is set, arranges 4/m of density
2, microporous aeration device adopts air compressor 19 air feed, and air demand is 1m
3/ min.
This treatment process can realize the efficient processing to sewage by the multiple actions such as microbiological deterioration, filler Filtration Adsorption and waterplant absorption to sanitary sewage, especially improves the nitric efficiency of sewage.Anaerobic fixed film reactor 2 can be realized the hydrolysis to hardly degraded organic substance in the sewage, and hard-degraded substance is converted into easy degradation material.Filtering unit 6 helps subsequent disposal with macrobead suspended substance amputation in the sewage.Little aeration aerating unit 7 improves dissolved oxygen content in the sewage, improves the degree of nitration of nitrogenous source, and then improves the nitric efficiency of sewage.One-level artificial swamp 3, secondary artificial swamp 4 and three grades of artificial swamp 5 interior fillers are filled gravel 15, zeolite 16 and green stone 17, plant reed 21 simultaneously, wherein, zeolite has bigger specific surface area and good ion-exchange capacity, can adsorb the ammonium radical ion in the sewage, improve ammonia-N removal rate in the sewage; The green stone sub-surface contains more calcium class material, the efficiently phosphorus in the water of place to go; Reed is owing to have flourishing root system, a large amount of microorganisms that can survive around the root system, so the organism in the sewage can absorb and the microorganism dual function be removed by root system.Carbon source is replenished and is adopted corn cob carbon source as a supplement in the pond 8, improves the carbon-nitrogen ratio of sewage, improves the nitric efficiency of sewage.Carbon source is replenished and is adopted maize straw carbon source as a supplement in the pond 9, improves the carbon-nitrogen ratio of sewage, improves the nitric efficiency of sewage.
Four, description of drawings
Fig. 1 is site plan of the present invention (an arrow representative water (flow) direction).
Fig. 2 is grille well 1 of the present invention and anaerobic fixed film reactor 2 planes and sectional view.
Fig. 3 is filtering unit 6 sectional views of the present invention.
Fig. 4 is 7 planes, little aeration aerating of the present invention unit and sectional view.
Fig. 5 is one-level artificial swamp 3 sectional views of the present invention.
Fig. 6 is that carbon source of the present invention is replenished pond 8 sectional views.
Fig. 7 is that carbon source of the present invention is replenished pond 9 sectional views.
Five, embodiment
Describe the present invention below in conjunction with Figure of description.But scope of the present invention is not limited in this.
Connect successively as shown in Figure 1 grille well 1, anaerobic fixed film reactor 2, filtering unit 6, little aeration aerating unit 7, one-level artificial swamp 3, carbon source replenishes pond 8, secondary artificial swamp 4, carbon source and replenishes pond 9, little aeration aerating unit 7 and three grades of artificial swamps 5.This treatment process can realize the efficient processing to sewage by the multiple actions such as microbiological deterioration, filler Filtration Adsorption and waterplant absorption to sanitary sewage, especially improves the nitric efficiency of sewage.
Fig. 2 is grille well 1 of the present invention and anaerobic fixed film reactor 2 planes and sectional view.One coarse rack 10 is set with fine fack 11 in the grille well 1, mainly big suspended substance in the sewage excluded; Soft biologic packing material 12 is set in the anaerobic fixed film reactor 2, anaerobion can be attached on the soft biologic packing material 12, soft-filler provides interdependent place to microorganism on the one hand, also improved microbial numbers on the other hand, can realize hydrolysis, hard-degraded substance is converted into easy degradation material hardly degraded organic substance in the sewage; Simultaneously, establish S shape flow deflector 14 in the anaerobic fixed film reactor 2 and help sewage in anaerobic fixed film reactor 2, to mix, improve organic removal efficient.
Fig. 3 is filtering unit 6 sectional views of the present invention.Four layers of filter packing are set in the filtering unit 6, and filler kind from bottom to top is gravel 15 and three grades of grating quartz sands 20, and filtering unit 6 helps organic subsequent disposal in the sewage with macrobead suspended substance amputation in the sewage.
Fig. 4 is 7 planes, little aeration aerating of the present invention unit and sectional view.In little aeration aerating unit 7 microporous aeration device 18 is set, arranges 4/m of density
2, microporous aeration device adopts air compressor 19 air feed, and air demand is 1m
3/ min.Little aeration aerating unit 7 can improve dissolved oxygen content in the sewage, improve the degree of nitration of nitrogenous source, and then improves the nitric efficiency of sewage.
Fig. 5 is one-level artificial swamp 3 sectional views of the present invention.Secondary artificial swamp 4, three grades of artificial swamps 5 are identical with the cross-section structure of one-level artificial swamp 3.One-level artificial swamp 3, secondary artificial swamp 4 and three grades of artificial swamp 5 interior fillers are filled gravel 15, zeolite 16 and green stone 17, plant reed 21 simultaneously, wherein, zeolite has bigger specific surface area and good ion-exchange capacity, can adsorb the ammonium radical ion in the sewage, improve ammonia-N removal rate in the sewage; The green stone sub-surface contains more calcium class material, the efficiently phosphorus in the water of place to go; Reed is owing to have flourishing root system, a large amount of microorganisms that can survive around the root system, and the organism in the sewage can absorb and the microorganism dual function be removed by root system.
Fig. 6 and Fig. 7 are the sectional views that carbon source of the present invention is replenished pond 8 and 9.Carbon source is replenished and is adopted corn cob carbon source as a supplement in the pond 8, and carbon source is replenished and adopted maize straw carbon source as a supplement in the pond 9, and both all can improve the carbon-nitrogen ratio of sewage, improve the nitric efficiency of sewage.
Be applicable to that principal pollutant are COD in the sewage that adopts the native system processing
Cr, BOD
5, ammonia nitrogen, TP, enter the water inlet COD of native system
Cr, BOD
5, ammonia nitrogen, TP concentration be respectively≤350mg/L, 200mg/L, 50mg/L, 10mg/L, after adopting native system to handle, every pollutent index is as follows in the water outlet: COD
CrGo out water concentration≤50mg/L, BOD
5Go out water concentration≤10mg/L, ammonia nitrogen goes out water concentration≤5mg/L, and TP goes out water concentration≤0.5mg/L." urban wastewater treatment firm pollutant emission standard " (GB18918-2002) middle one-level A standard is satisfied in water outlet after treatment.
Claims (8)
1. a method and a system thereof that improves the underflow type artificial wet land nitric efficiency comprises placed in-line grille well 1, anaerobic fixed film reactor 2, filtering unit 6, little aeration aerating unit 7, one-level artificial swamp 3, the additional pond 8 of carbon source, secondary artificial swamp 4, carbon source additional pond 9, little aeration aerating unit 7 and three grades of artificial swamps 5.
2. method according to claim 1 and system thereof is characterized in that: sewage level has potential difference 0.5-0.8m between grille well 1, anaerobic fixed film reactor 2, one-level artificial swamp 3, secondary artificial swamp 4 and the three grades of artificial swamps 5.
3. method according to claim 1 and system thereof is characterized in that: one-level artificial swamp 3 is horizontal drowned flow formula artificial swamp, and one-level artificial swamp 3 front ends are provided with filtering unit 6 and little aeration aerating unit 7.
4. method according to claim 1 and system thereof, it is characterized in that: in described one-level artificial swamp 3, secondary artificial swamp 4 and the three grades of artificial swamps 5 fillers from bottom to top kind be gravel 15, zeolite 16 and green stone 17, depth of packing is gravel 200mm, zeolite 400mm and the sub-300mm of green stone; Packing material size is gravel 50-100mm, zeolite 10-15mm and the sub-5-10mm of green stone.Plantation reed 21 in the one-level artificial swamp 3, reed planting degree of depth 30-40cm, spacing in the rows 30-40cm.
5. method according to claim 1 and system thereof is characterized in that: secondary artificial swamp 4 is horizontal drowned flow formula artificial swamp, and secondary artificial swamp 4 front ends are provided with carbon source and replenish pond 8, and carbon source is replenished and adopted corn cob 21 carbon source as a supplement in the pond 8.
6. method according to claim 1 and system thereof, it is characterized in that: described three grades of artificial swamps 5 are the surface current artificial wetland, three grades of artificial swamp 5 front ends are provided with carbon source and replenish pond 9 and little aeration aerating unit 7, and carbon source is replenished and adopted maize straw 22 carbon source as a supplement in the pond 9.
7. method according to claim 1 and system thereof, it is characterized in that: four layers of filter packing are set in the filtering unit 6, water (flow) direction from bottom to top, filler kind from bottom to top is gravel 15 and three grades of grating quartz sands 20, depth of packing is gravel 200mm, grating quartz sand 600mm; Packing material size is gravel 50-100mm, grating quartz sand particle size 15-20mm (thickness 20cm), grating quartz sand particle size 10-15mm (thickness 20cm), grating quartz sand particle size 5-10mm (thickness 20cm).
8. method according to claim 1 and system thereof is characterized in that: in little aeration aerating unit 7 microporous aeration device 18 is set, arranges 4/m of density
2, microporous aeration device adopts air compressor 19 air feed, and air demand is 1m
3/ min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104828951A (en) * | 2015-05-11 | 2015-08-12 | 中国科学院东北地理与农业生态研究所 | Enhanced carbon-nitrogen synchronous removing system of ecological control type artificial wetland |
| CN105600931A (en) * | 2016-03-15 | 2016-05-25 | 中国科学院东北地理与农业生态研究所 | Micro-aeration solid carbon source wetland system with advanced nitrogen removal function and nitrogen removal treatment technology thereof |
| CN105923790A (en) * | 2016-06-16 | 2016-09-07 | 中国矿业大学 | Composite horizontal subsurface flow combined artificial wetland system and method |
| CN108751418A (en) * | 2018-06-29 | 2018-11-06 | 东华大学 | A kind of carbon source self-adding production firedamp type efficient denitrification horizontal drowned flow artificial wet land |
| CN114956461A (en) * | 2022-05-30 | 2022-08-30 | 广州市环境保护工程设计院有限公司 | Rural sewage recycling treatment system and treatment method |
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| CN1752033A (en) * | 2004-09-23 | 2006-03-29 | 袁伟刚 | High efficiency method of treating household sewage by artificial wet land |
| CN101525184A (en) * | 2009-04-22 | 2009-09-09 | 河海大学 | Method for complementing organic carbon sources to artificial wetland |
| CN101575156A (en) * | 2009-06-03 | 2009-11-11 | 南京工业大学 | Artificial wetland system with strengthened denitrification and dephosphorization |
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2011
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| WO1995014368A2 (en) * | 1993-11-26 | 1995-06-01 | Vladislav Petrov Somlev | A method for the complex purification of waste solutions |
| CN1752033A (en) * | 2004-09-23 | 2006-03-29 | 袁伟刚 | High efficiency method of treating household sewage by artificial wet land |
| CN101525184A (en) * | 2009-04-22 | 2009-09-09 | 河海大学 | Method for complementing organic carbon sources to artificial wetland |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104828951A (en) * | 2015-05-11 | 2015-08-12 | 中国科学院东北地理与农业生态研究所 | Enhanced carbon-nitrogen synchronous removing system of ecological control type artificial wetland |
| CN104828951B (en) * | 2015-05-11 | 2017-07-21 | 中国科学院东北地理与农业生态研究所 | A kind of artificial wet land reinforced carbon nitrogen of ecological regulation and control type synchronously removes system |
| CN105600931A (en) * | 2016-03-15 | 2016-05-25 | 中国科学院东北地理与农业生态研究所 | Micro-aeration solid carbon source wetland system with advanced nitrogen removal function and nitrogen removal treatment technology thereof |
| CN105600931B (en) * | 2016-03-15 | 2018-08-28 | 中国科学院东北地理与农业生态研究所 | A kind of micro- aeration type solid carbon source wet land system and its denitrification treatment process with advanced nitrogen function |
| CN105923790A (en) * | 2016-06-16 | 2016-09-07 | 中国矿业大学 | Composite horizontal subsurface flow combined artificial wetland system and method |
| CN108751418A (en) * | 2018-06-29 | 2018-11-06 | 东华大学 | A kind of carbon source self-adding production firedamp type efficient denitrification horizontal drowned flow artificial wet land |
| CN108751418B (en) * | 2018-06-29 | 2021-06-04 | 东华大学 | Carbon source self-supply methane-producing type efficient denitrification horizontal subsurface flow constructed wetland |
| CN114956461A (en) * | 2022-05-30 | 2022-08-30 | 广州市环境保护工程设计院有限公司 | Rural sewage recycling treatment system and treatment method |
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Application publication date: 20110907 |