CN1190371C - Fortified artificial wetlan sewage disposal method and system - Google Patents
Fortified artificial wetlan sewage disposal method and system Download PDFInfo
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- CN1190371C CN1190371C CNB031500536A CN03150053A CN1190371C CN 1190371 C CN1190371 C CN 1190371C CN B031500536 A CNB031500536 A CN B031500536A CN 03150053 A CN03150053 A CN 03150053A CN 1190371 C CN1190371 C CN 1190371C
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- 239000010865 sewage Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 62
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 31
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 31
- 239000011574 phosphorus Substances 0.000 claims abstract description 31
- 239000002689 soil Substances 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 244000005700 microbiome Species 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 3
- 238000004080 punching Methods 0.000 claims description 9
- 235000014676 Phragmites communis Nutrition 0.000 claims description 6
- 241000746966 Zizania Species 0.000 claims description 6
- 235000002636 Zizania aquatica Nutrition 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 210000000476 body water Anatomy 0.000 claims description 4
- 238000005842 biochemical reaction Methods 0.000 claims description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004064 recycling Methods 0.000 abstract description 3
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- 238000010521 absorption reaction Methods 0.000 abstract 1
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- 239000004575 stone Substances 0.000 description 7
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- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 238000009954 braiding Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 241000256113 Culicidae Species 0.000 description 1
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- 208000028804 PERCHING syndrome Diseases 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 230000001954 sterilising effect Effects 0.000 description 1
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- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The present invention provides a method and a system for sewage disposal in fortified artificial wet land, which relates to a land treating method and a device suitable for treating and recycling sewage of small-scale industries and domestic sewage of dispersed living areas, such as coutryside towns, holiday villages, sanitariums, etc., and urban resident cells. In the present invention, sewage is uniformly distributed to a composite filler layer with good ventilation and water permeability through a water distributing system, and the composite filler is composed of slag, red soil and humus; the composite filler combines plants with strong oxygen excreting capacity of planting roots, large growth and good nitrogen and phosphorus absorption, and then the sewage is purified under the action of the combined purifiction functions of the filler, microorganisms and a plant system. The present invention has the advantages of capital cost saving, large treating flow quantity and no power consumption without generating the phenomenon of filler blockage, and the removing rate to COD, ammonia nitrogen, total nitrogen and total phosphorus in the domestic sewage can be more than 90%; the treated effluent water can be directly used for recycling, and ground can be used for planting ornamental plants, and can be combined with the functions of ecological construction and urban greening.
Description
Technical field
The present invention relates to a kind of sewage disposal and carry out the regeneration technology of sewage, be particularly related to a kind of live scattered soil of sanitary sewage of residence district and town dweller sub-district of small towns, mountain area, the village of having a holiday, sanatorium's five equilibrium that is used for and handle and carry out the system for regenerating and recycling of sewage, it also can be used for the Small Scale Industry wastewater treatment.
Background technology
In recent years, along with development economic and society, environmental problem becomes increasingly conspicuous, to the requirement of sewage disposal not only in the city but also also more and more higher in the small towns.Small towns, mountain area, the villa district five equilibrium geographic sanitary sewage of living scattered carries pollution substances such as a large amount of nitrogen, phosphorus, organic matter and enters water body, makes water body face the danger of serious eutrophication.In addition, serious day by day along with the water resources form, also more and more to the requirement of carrying out reuse after the sewage disposal.
Although such as sanitary sewage disposal technology comparative maturities such as activated sludge process, oxidation ditch, biological fluidized bed, biological filter, film-bioreactors, but expensive cost and operational and administrative expenses have limited them in the geographic application of living scattered, and the nitrogen of some treatment process, phosphorus poor removal effect.The water base expense of building of ton as traditional activated sludge process technology is about 1500～2000 yuan, and ton water running expense is 0.7～1.2 yuan.Pollutants removal rates such as total nitrogen, phosphorus are respectively 50～70%, 40～60%.Though film-bioreactor technology effluent quality is fine, to handle back sewage and can reach middle water reuse requirement, its cost and working cost are then higher.
Common soil treatment process, as slow land treatment system, rapid infiltration system, overland flow system, sanitary sewage is had cost-effective treatment effect usually, but these technologies also exist and are subjected to shortcomings such as effect of natural conditions is big, floor space is big.Ton water floor space as rapid infiltration system is about 2～60m
2, the ton water floor space of overland flow system is about 15～120m
2By comparison, the ton water floor space of Activated Sludge Process only is 1～6m
2Artificial swamp has characteristics such as low, simple to operate, the maintenance of investment and working cost are low, can afforest the soil simultaneously, improves the ecological environment, be fit to live scattered the area and in, the sewage disposal technology of samll cities and towns.But this technology still exists nitrogen, the phosphorus removal effect is undesirable, and floor space is big, occurs short stream of sewage and dead band easily and problem such as cause that operating performance can not be given full play to.As conventional artificial swamp the clearance of nitrogen, phosphorus is respectively 50～70%, 60～80%, ton water covers an area of 10～20m
2In addition, though some land treatment system, as can improve removal greatly through the subsurface wastewater infiltration system of intensified water-layout to nitrogen, phosphorus in the sewage, but it exists soil to stop up easily, and the sewage disposal flow is little, and floor space is big, problems such as operation mode complexity, and need consumption of power.
Summary of the invention
The objective of the invention is to overcome the weak point of above-mentioned technology, a kind of strengthened artificial wet land sewage water treatment method and system are provided, it has not only that the investment of conventional artificial swamp is low, simple to operate, maintenance and working cost is low, can afforest the soil, characteristics such as improve the ecological environment, having the soil of making simultaneously is not easy to stop up, the sewage disposal flow is big, to the removal efficient advantages of higher of nitrogen, phosphorus in the sewage.
Technical solution of the present invention is as follows: a kind of strengthened artificial wet land sewage water treatment method, this method comprises the steps:
A. excavate a rectangle pond body on ground, in pond body bottom with spread impervious barrier all around;
B. at the front end and 1/3rd places of pond body water distributor and water distributing area are set, header and catchment area are set at the afterbody of pond body;
C. filling by volume ratio in the body of pond is 50～85% slags, 10～30% red soil and the formulated compounded mix of 5～20% soil ulmin; The pond body first three/one section the plantation root system secrete the strong waterplant of oxygen ability, behind wetland 2/3rds sections the plantation increments big, nitrogen, the waterplant that the phosphorus sorption is good.
D. the water distributor by front end and 1/3rd places makes sewage enter into pond body water distributing area, sewage evenly enters into the compounded mix of body inside, pond behind the water distributing area water distribution, sewage is at waterplant, filler and be grown under physics, chemistry and the biochemical reaction combined action of the microorganism of filling surface and be purified, and discharges the pond body through catchment area and header again.
A kind of artificial marsh sewage treatment system provided by the invention is characterized in that: this system is included in the bottom and is covered with the rectangle pond body of impervious barrier all around; At the front end of pond body and 1/3rd punishment water distributor and water distributing area are not set, header and catchment area are set at the afterbody of pond body; In the body of pond, fill by the formulated compounded mix of slag, red soil and soil ulmin; The pond body first three/one section the plantation root system secrete the strong waterplant of oxygen ability, behind wetland 2/3rds sections the plantation increments big, nitrogen, the waterplant that the phosphorus sorption is good.
In system provided by the present invention, the long-width ratio of its rectangle pond body is 5～10: 1, and the degree of depth is 60～120cm, the gradient 0.5%～2%.
Water distributor of the present invention and header be punching at interval downwards along 90 ° of both sides, pitch of holes 10～15cm, aperture 2～5mm; Described header adopts pvc pipe and rubber hose two portions to form.
It is the cobble of 30～60mm that diameter is filled in water distributing area of the present invention and catchment area.
In the Sewage treatment systems of the present invention, the pond body first three/one section the plantation reed; 2/3rds sections plantation wild rice stems behind wetland.
The present invention has the following advantages and the high-lighting effect: 1. adopted the Multifunction compounded mix, pollutents such as phosphorus are had very strong adsorptive power.The hydraulic conductivity of filler can be good, and the pore texture prosperity is suitable as microorganism carrier, and its ingredient can promote the growth of microorganism; In addition, the filler that is adopted is cheap, and wide material sources meet the needs on the engineering; 2. the optimization of the filling mode of filler and water distribution, rainwater catchment has prevented the appearance in internal system short-circuit flow and dead band effectively, has improved the effective volume of internal system, also helps the even water supply to plant; 3. the removal ability to nitrogen, phosphorus is strong, can be up to more than 90%.Treat effluent water quality is good, water reuse in promptly can be used for after conventional liquid chlorine sterilization; 4. because the filler hydraulic conductivity of being prepared can be good, sewage is by the gravity treatment system of just flowing through smoothly under certain slope, therefore compares with land treatment system such as subsurface infiltration, and the processing flow is bigger, floor space reduces, and can not produce the filler latch up phenomenon.In addition, operation is simple, and consumption of power has not been saved working cost.Relatively can save capital cost 60%～80% with traditional sewage activated sludge method processing technique, save operational and administrative expenses 80%～100%; 6. sewage flows in internal system, can not multiply mosquitos and flies, distribute unpleasant odor.Landscape plant can be planted in the wetland face of land, can directly combine with greening.7. can be many biologies the place of perching is provided, have good ecological functions and effect.
Description of drawings
Fig. 1 is the structural representation of strengthened artificial wet land Sewage treatment systems provided by the invention.
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1-impervious barrier, the 2-water distributor of boring a hole, 3-stone water distributing area, 4-1/3 place perforation water distributor, the preceding 1/3 district plant of 5-, 2/3 district plant behind the 6-, the 7-root system of plant, 8-stone catchment area, the 9-header of boring a hole, the 10-partition wall, 11-is adjustable water level rubber hose, 12-braiding channel, the 13-water inlet pipe, the 14-isocon, preceding 1/3 packing area of 15-, 2/3 packing area behind the 16-.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
Strengthened artificial wet land mainly is made up of pond body, filler, waterplant, water distributing area, catchment area and pipeline.Sewage is transported to the front end and 1/3 place of pond body respectively through water inlet pipe 13 and isocon 14, enter into packing area 15 and 16 by stone water distributing area 3, after tail end imports stone catchment area 8, enter braiding channel 12, discharge the pond body through perforation pvc pipe 9 and adjustable water level rubber hose 11.
The filler main composition of strengthened artificial wet land inside is descending slag, red soil and the soil ulmin of being followed successively by of ratio by volume, and wherein the ratio of red soil is 10～30%, and the ratio of soil ulmin is 5～20%, and all the other are slag; Above-mentioned uniform filling is filled into preceding 1/3 packing area 15 and 2/3 packing area 16, back after mixing the formation compounded mix, inner short the stream and the dead band phenomenon of the wetland that can avoid the filler inequality to cause effectively.
Plant growing mode to wetland has been carried out matched combined.Wetland first three/one section the plantation root system secrete the strong waterplant of oxygen ability 5, for example can plant plants such as reed, help the organic substance in the degradation of sewage.2/3rds sections plantation increments are big behind the wetland, and nitrogen, the waterplant 6 that the phosphorus sorption is strong are for example planted wild rice stem, help the removal of nitrogen in the sewage, phosphorus.
Wetland entry mode: the sewage that enters wetland is shunted, promptly except the head end water inlet, also be provided with water distributor 4 at 1/3rd places of wetland, shunt a part of sewage, the sewage separation ratio is 10～40%.Alleviate the pollutant load of wetland front end like this, increased the carbon/nitrogen ratio of wetland rear end, effectively guaranteed carrying out smoothly of anti-nitration reaction, and the steady removal of pollutent;
In order to make the sewage can even horizontal plug-flow in wetland inside, the long-width ratio of wetland be controlled at 5～10: 1.In addition, system adopts perforated pipe 2 and 4 water distribution uniformities, is catchmented by perforation header 9, and header 9 adopts pvc pipe and rubber hose two portions to form, all punchings at interval downwards along 90 ° of both sides of water distributor and header, pitch of holes 10～15cm, aperture 2～5mm; Rubber hose 11 can be regulated freeboard.Can regulate the water level and the fluidised form of improving wetland of wetland so very easily, avoid the generation in short stream and dead band.Wetland water distribution manner and rainwater catchment are optimized.
Embodiment 1
Compounded mix is formed by 85% slag, 10% red soil and 5% soil ulmin mixed preparing by volume in the artificial wet land system.The wetland area is 5m2, degree of depth 60cm, and the gradient 0.5%, first three/one section plantation reed, 2/3rds sections plantations in back wild rice stem.Water distributor adopts the pvc pipe of diameter 25mm, the punching at interval downwards along 90 ° of both sides, pitch of holes 10cm, aperture 2mm; Header adopts the pvc pipe of diameter 50mm, the punching at interval downwards along 90 ° of both sides, pitch of holes 10cm, aperture 10mm.Adjustable hose diameter is 50mm.Filling diameter in stone water distributing area and the catchment area is the cobble of 30～60mm.System's hydraulic load is 4cm/d, and the mode that adopts sewage to batch is continuously intake, and 1/3 place's sewage separation ratio accounts for 10% of sewage total amount.Water inlet is respectively the sanitary sewage of 115～293mg/L, 18～40mg/L, 15～35mg/L, 1.5～3.5mg/L for COD, ammonia nitrogen, total nitrogen, total phosphorus concentration.After this strengthened artificial wet land system handles, the clearance of COD, ammonia nitrogen, total nitrogen and total phosphorus is all more than 90%, COD in the water outlet, ammonia nitrogen, total nitrogen, total phosphorus concentration are lower than 40mg/L, 4mg/L, 7mg/L and 0.15mg/L respectively, and treat effluent reaches " miscellaneous domestic water quality standard " (CJ251-89).
Embodiment 2
Compounded mix is formed by 50% slag, 30% red soil and 20% soil ulmin mixed preparing by volume in the artificial wet land system.The wetland area is 5m2, degree of depth 80cm, and the gradient 1%, first three/one section plantation reed, 2/3rds sections plantations in back wild rice stem.Water distributor adopts the pvc pipe of diameter 25mm, the punching at interval downwards along 90 ° of both sides, pitch of holes 10cm, aperture 5mm; Header adopts the pvc pipe of diameter 50mm, the punching at interval downwards along 90 ° of both sides, pitch of holes 10cm, aperture 10mm.Adjustable hose diameter is 50mm.Filling diameter in stone water distributing area and the catchment area is the cobble of 30～60mm.Establish the contrast wetland in addition, its structure is identical with operational conditions, but the wetland inner stuffing adopts traditional filling mode, is specially: gravel is filled in the bottom, slag, top layer filling general soil are filled in the middle part.System's hydraulic load is 6cm/d, and the mode that adopts sewage to batch is continuously intake, and 1/3 place's sewage separation ratio accounts for 20% of sewage total amount.Add COD, ammonia nitrogen, total nitrogen, total phosphorus mean concns and be respectively the sanitary sewage of 265.2mg/L, 21.5mg/L, 22.8mg/L, 1.79mg/L, the strengthened artificial wet land system is respectively 90.0%, 89.0%, 85.5%, 96.6% to the clearance of COD, ammonia nitrogen, total nitrogen and total phosphorus, treat effluent COD, ammonia nitrogen, total nitrogen, total phosphorus mean concns are respectively 26.6mg/L, 2.5mg/L, 3.1mg/L, 0.09mg/L, reach " miscellaneous domestic water quality standard " (CJ251-89).And contrast wetland treat effluent COD, ammonia nitrogen, total nitrogen, the average 45.8mg/L of total phosphorus, 5.0mg/L, 5.2mg/L, 0.68mg/L, clearance to COD, ammonia nitrogen, total nitrogen and total phosphorus is respectively 82.7%, 77.9%, 75.8%, 75.4%, well below the clearance of strengthened artificial wet land system to pollutent.
Embodiment 3
Compounded mix is formed by 60% slag, 25% red soil and 15% soil ulmin mixed preparing by volume in the artificial wet land system.The wetland area is 5m
2, degree of depth 120cm, the gradient 2%, first three/one section plantation reed, 2/3rds sections plantations in back wild rice stem.Water distributor adopts the pvc pipe of diameter 25mm, the punching at interval downwards along 90 ° of both sides, pitch of holes 10cm, aperture 5mm; Header adopts the pvc pipe of diameter 50mm, the punching at interval downwards along 90 ° of both sides, pitch of holes 10cm, aperture 10mm.Adjustable hose diameter is 50mm.Filling diameter in stone water distributing area and the catchment area is the cobble of 30～60mm.Establish the contrast wetland in addition, wetland structure is identical with operational conditions, but inner stuffing is mixed by slag and general soil.System's hydraulic load is 9cm/d, and the mode that adopts sewage to batch is continuously intake, and 1/3 place's sewage separation ratio accounts for 40% of sewage total amount.Add C0D, ammonia nitrogen, total nitrogen, total phosphorus mean concns and be respectively the sanitary sewage of 252.4mg/L, 20.2mg/L, 25.3mg/L, 3.34mg/L, COD in the system handles water outlet, ammonia nitrogen, total nitrogen, the average 24.3mg/L of total phosphorus, 2.6mg/L, 3.0mg/L, 0.12mg/L, clearance to COD, ammonia nitrogen, total nitrogen and total phosphorus is respectively 90.4%, 86.9%, 88.3%, 96.2%, and treat effluent reaches " miscellaneous domestic water quality standard " (CJ251-89).And the average 60.6mg/L of COD, ammonia nitrogen, total nitrogen, total phosphorus, 6.2mg/L, 6.7mg/L, 0.59mg/L in the contrast wetland treat effluent, clearance to COD, ammonia nitrogen, total nitrogen and total phosphorus is respectively 76.0%, 69.6%, 73.6%, 82.1%, well below the clearance of strengthened artificial wet land system to pollutent.
Claims (7)
1. strengthened artificial wet land sewage water treatment method, this method comprises the steps:
A. excavate a rectangle pond body on ground, in pond body bottom with spread impervious barrier all around;
B. at the front end and 1/3rd places of pond body water distributor and water distributing area are set, handled sewage is shunted; Afterbody at the pond body is provided with header and catchment area;
C. filling by volume ratio in the body of pond is 50～85% slags, 10～30% red soil and the formulated compounded mix of 5～20% soil ulmin; The pond body first three/one section the plantation root system secrete the strong waterplant of oxygen ability, behind wetland 2/3rds sections the plantation increments big, nitrogen, the waterplant that the phosphorus sorption is good;
D. the water distributor by front end and 1/3rd places makes sewage enter into pond body water distributing area, sewage evenly enters into the compounded mix of body inside, pond behind the water distributing area water distribution, sewage is at waterplant, filler and be grown under physics, chemistry and the biochemical reaction combined action of the microorganism of filling surface and be purified, and discharges the pond body through catchment area and header again.
2. according to the described marsh sewage treating method of claim 1, it is characterized in that: described sewage separation ratio is: the sewage at Chi Tisan/place accounts for 10～40% of sewage total amount.
3. according to the described marsh sewage treating method of claim 1, it is characterized in that: it is reed that described root system is secreted the strong waterplant of oxygen ability; Described increment is big, and nitrogen, the waterplant that the phosphorus sorption is good are wild rice stem.
4. implement the artificial marsh sewage treatment system of method according to claim 1, it is characterized in that: this system is included in the bottom and spreads the rectangle pond body of impervious barrier all around; At the front end of pond body and 1/3rd punishment water distributor and water distributing area are not set, header and catchment area are set at the afterbody of pond body; In the body of pond, fill by the formulated compounded mix of slag, red soil and soil ulmin; The pond body first three/one section the plantation root system secrete the strong waterplant of oxygen ability, behind wetland 2/3rds sections the plantation increments big, nitrogen, the waterplant that the phosphorus sorption is good.
5. according to the described Sewage treatment systems of claim 4, it is characterized in that: the long-width ratio of described rectangle pond body is 5～10: 1, and the degree of depth is 60～120cm, the gradient 0.5%～2%.
6. according to the described Sewage treatment systems of claim 4, it is characterized in that: described water distributor and header be punching at interval downwards along 90 ° of both sides, pitch of holes 10～15cm, aperture 2～5mm; Described header adopts pvc pipe and rubber hose two portions to form.
7. according to claim 4 or 5 described Sewage treatment systemss, it is characterized in that: it is the cobble of 30～60mm that diameter is filled in described water distributing area and catchment area.
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| CNB031500536A CN1190371C (en) | 2003-07-31 | 2003-07-31 | Fortified artificial wetlan sewage disposal method and system |
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| CNB031500536A CN1190371C (en) | 2003-07-31 | 2003-07-31 | Fortified artificial wetlan sewage disposal method and system |
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| CN1475448A CN1475448A (en) | 2004-02-18 |
| CN1190371C true CN1190371C (en) | 2005-02-23 |
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| CN101708925B (en) * | 2009-11-06 | 2011-07-27 | 山东大学 | Nested oxygen-enhanced landscape vertical current artificial wetland |
| CN101973636A (en) * | 2010-09-26 | 2011-02-16 | 山东大学 | Distributed water inflow enhanced biological denitrification subsurface flow wetland |
| CN102259982B (en) * | 2011-07-09 | 2012-09-05 | 桂林理工大学 | Water distribution device for strengthened land treatment for domestic sewage |
| CN102417240B (en) * | 2011-10-16 | 2013-04-24 | 西安建筑科技大学 | Constructed wetland sewage treatment device |
| CN105060631A (en) * | 2015-08-05 | 2015-11-18 | 枞阳县宇瑞环保科技有限公司 | Phosphor-recovery sewage treatment method |
| CN108726804B (en) * | 2018-06-13 | 2022-12-09 | 深圳市大鹏园林生态建设有限公司 | Enhanced nitrogen and phosphorus removal constructed wetland system based on plant optimization configuration |
-
2003
- 2003-07-31 CN CNB031500536A patent/CN1190371C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340499C (en) * | 2005-09-12 | 2007-10-03 | 云南今业生态建设集团环保工程有限公司 | Polluted water land disposal method using light haydite as main stuffing |
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