CN201106009Y - Photocatalysis and multi-medium deep treatment system for country single-family living sewage - Google Patents
Photocatalysis and multi-medium deep treatment system for country single-family living sewage Download PDFInfo
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- CN201106009Y CN201106009Y CNU2007201844243U CN200720184424U CN201106009Y CN 201106009 Y CN201106009 Y CN 201106009Y CN U2007201844243 U CNU2007201844243 U CN U2007201844243U CN 200720184424 U CN200720184424 U CN 200720184424U CN 201106009 Y CN201106009 Y CN 201106009Y
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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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The utility model relates to a photocatalytic and multi-medium advanced treatment system for domestic sewage of a single rural family. The advanced treatment system consists of a multifunctional baffling reactor, a photocatalytic composite reaction tank and a multi-medium capillary infiltration system, wherein, the multifunctional baffling reactor consists of a collection tank, a sedimentary adjusting tank and an anaerobic fermentation tank; the photocatalytic composite reaction tank consists of a pressurizing tank, a photocatalytic filter tank and a sedimentary distributing reservoir; an inlet of the collection tank is connected with a collection pipe network, and is connected with the sedimentary adjusting tank through a first perforated panel; the sedimentary adjusting tank is connected with the anaerobic fermentation tank through a second perforated panel; the anaerobic fermentation tank is divided into an upper flow chamber and a lower flow chamber, and the upper flow chamber is filled with fillers, while the lower flow chamber is connected with a upper flow chamber of an anaerobic filter tank through a third perforated panel; the sewage enters the photocatalytic filter tank in a form of water mist formed by a spray head after passing through a pressurizing pump and a pressure pipe. The photocatalytic and multi-medium advanced treatment system for domestic sewage of the single rural family has the advantages that: 1. the treatment effect is stable and the applicability is strong; 2. slag removal period is long, and the maintenance is convenient; 3. recycling of sewage can be realized, and no pollution is caused.
Description
Technical field
The utility model relates to rural area single household treatment of domestic sewage advanced technology, mainly is the photochemical catalysis and the multimedium advanced treatment system of a kind of rural area single household sanitary sewage.
Background technology
In recent years, central and local government is paid much attention to the agriculture, rural areas and farmers problem, done a large amount of work aspect the human settlement of Rural areas improving, obtained significant results, but compared with the city, owing to have a poor foundation, the basis is poor, distribute extensively, the infrastructure construction in current China rural area is very backward, and the human settlement is poor, and environmental safety hidden danger and problem are outstanding, the blue-green algae problem that Taihu Lake in 2007, Chaohu occur is exactly the concentrated expression of body eutrophication.Country pays much attention to the improvement work of rural environmental pollution, clearly proposes to build the slogan of " cleaning water source, cleaning home, cleaning rural area " new socialist countryside in " the moderately well-off environmental protection plan in national rural area ".Quickening along with new socialist countryside in all parts of the country pace of construction, country sewage becomes big main source of pollution, the unprocessed in line cloaca of a large amount of sanitary sewages, and then lead to the river course, cause urban and rural environment to be subjected to serious destruction, become big public hazards in town and country, the health that directly threatens urban and rural residents' health is a bottleneck of new rural area civilization construction.Country sewage generally lacks effective improvement.2005, Ministry of Construction's tissue shows the investigation of national part village: 96% village did not have escape canal and Sewage treatment systems; 89% village with dumping before the room behind the house, the hole wing is other in addition waterhead area, flood-relief channel, village inside and outside the pond, unmannedly be responsible for refuse collection and processing.
Therefore, national new countryside construction need effectively be handled the sanitary sewage in vast rural area, yet most of rural area is to loose and uneven, and this certainly will will adopt cheap, the tangible novel treatment technology of treatment effect.
The utility model content
The utility model will solve the defective of above-mentioned prior art, provide the photochemical catalysis and the multimedium advanced treatment system of a kind of rural area single household sanitary sewage, the effective organism in the middle of the degradation of sewage, fixed inorganic salt, remove elements such as nitrogen, phosphorus, and realize the sewage recycling utilization.
The utility model solves the technical scheme that its technical problem adopts.The photochemical catalysis and the multimedium advanced treatment system of this rural area single household sanitary sewage, this system is made up of multi-functional baffled reactor, photochemical catalysis composite reaction pond and multimedium hollow billet infiltration system, and wherein multi-functional baffled reactor is made up of collecting tank, sedimentary adjustive pool, anaerobically fermenting pond; Photochemical catalysis composite reaction pond is made up of supercharging pond, photochemical catalysis filtering basin and precipitation distribution reservoir; The water-in of collecting tank is connected with the collection pipe network, is connected with sedimentary adjustive pool by first perforated board; Sedimentary adjustive pool links to each other with the anaerobically fermenting pond by second perforated board; The anaerobically fermenting pond is divided into upstream room and downstream room, and upstream room is filled filler, and downstream room links by the upstream room of the 3rd perforated board and anaerobism filtering basin; Topping-up pump and the penstock of sewage in the supercharging pond forms water smoke by shower nozzle then and enters the photochemical catalysis filtering basin; Precipitation distribution reservoir top is provided with distribution reservoir, and precipitation distribution reservoir two side guards are established the triangle overfalling weir, and the precipitation distribution reservoir is the water distribution of multimedium hollow billet filtration system by distributing pipe line.
First perforated board is used for gas flow and alleviates the instantaneous water yield impacting; Second perforated board punching place is provided with the water yield adjusting plate that is used to regulate current.
What anaerobically fermenting pond upstream room was filled is the polyamine fat filler that hole is respectively 3-5mm and 0.3-0.5mm.
The glass cover-plate of photochemical catalysis filtering basin has a gap plate, is placing the haydite that scribbles photocatalyst on the gap plate.
Cover plate is established on multi-functional baffled reactor top, and by the flange sealing, the side is provided with ventage and links to each other with airway, is transported to multimedium hollow billet filtration system through airway, carries out deodorization and handles.
Precipitation distribution reservoir top is sealed separately, and the side is provided with can be by the ventage of valve control.
The bottom that the multimedium hollow billet soaks into system is trapezoidal, adopts the pvc pipe water distribution, coats with gravel bed on every side, and is provided with filter screen and backfill soil separation, and the cloth pond that is made of waterproof cloth is set below water distributor, and the cloth pond is a ladder structure; The top layer is primary medium layer, the multimedium filter layer of primary medium layer bottom mainly comprises air-and water-permeable layer and multimedium filtering layer, the filtrate of air-and water-permeable layer is that 1-2mm yellow sand and particle diameter are that the coal ash slag of 1-3mm is formed by particle diameter, and its part by weight is a yellow sand: lime-ash is 80: 20; The weight proportion of the filtrate of multimedium filtering layer is primary medium: modified zeolite: lime-ash: filtrate=80: 8: 8: 4; The layer that catchments is the gravel of particle diameter 2-3cm, at the layer place that catchment header is set, header external parcel polyamine fat filter screen, and the header water outlet enters pump well.
The PVC permeability cell is inserted in top, water distributor gravel district and communicates with water distributor, is used to hollow billet to soak into the tonifying Qi oxygenation.
The effect that the utility model is useful is: utilize light-catalysed redoxomorphism and biological inoculum to divide desorption, effectively the organism in the degradation of sewage decomposes the macromolecular particle thing and the elements such as nitrogen, phosphorus that absorb in the sewage.Treatment and purification is effective, and running cost is low, helps promoting and using on a large scale.This treatment system has the following advantages: 1. treatment effect is stable, and suitability is strong, and working cost is almost nil; 2. the scarfing cinder cycle is long, easy to maintenance; 3. can realize sewage recycling, not produce any pollution.
Description of drawings
Fig. 1 is a single household domestic sewage in rural areas by using advanced treatment system site-plan in the utility model;
Fig. 2 is a reaction tank sectional view in the utility model;
Fig. 3 is that the multimedium hollow billet soaks into system's drawing in side sectional elevation in the utility model;
Fig. 4 is that the multimedium hollow billet soaks into system's longitudinal diagram in the utility model.
Description of drawings: collecting tank 1, sedimentary adjustive pool 2, anaerobically fermenting pond 3, supercharging pond 4, photochemical catalysis filtering basin 5, precipitation distribution reservoir 6, the multimedium hollow billet soaks into system 7, aqueduct 8, airway 9, pump well 10, first perforated board 11, second perforated board 12, the 3rd perforated board 13, topping-up pump 14, PVC permeability cell 15, water yield adjustable plate 16, polyamine fat filler 17, penstock 18, gap plate 19, glass cover-plate 20, haydite 21, ventage 22, triangle overfalling weir 23, waterproof cloth 24, primary medium layer 25, water distributor 26, header 27, layer 28 catchments, multimedium filtering layer 29, air-and water-permeable layer 30.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further:
As shown in the figure, the photochemical catalysis and the multimedium advanced treatment system of this rural area single household sanitary sewage, this system is linked in sequence by multi-functional baffled reactor, photochemical catalysis composite reaction pond and multimedium hollow billet infiltration system 7 and forms, multimedium hollow billet infiltration system brings into play major function by multimedium filtering layer wherein, this filtering layer filtrate is based on protoplasma filtrate meadow soil, red soil etc., be aided with lime-ash and zeolite, and be equipped with special-purpose filtrate formation.Wherein multi-functional baffled reactor is made up of collecting tank 1, sedimentary adjustive pool 2, anaerobically fermenting pond 3; Photochemical catalysis composite reaction pond is made up of supercharging pond 4, photochemical catalysis filtering basin 5 and precipitation distribution reservoir 6; The water-in of collecting tank 1 is connected with the collection pipe network, is connected with sedimentary adjustive pool 2 by first perforated board 11; Sedimentary adjustive pool 2 links to each other with anaerobically fermenting pond 3 by second perforated board 12; Anaerobically fermenting pond 3 is divided into upstream room and downstream room, and upstream room is filled filler, and downstream room links by the upstream room of the 3rd perforated board 13 with anaerobism filtering basin 3; Topping-up pump 14 and the penstock 18 of sewage in supercharging pond 4 forms water smoke by shower nozzle then and enters photochemical catalysis filtering basin 5; Precipitation distribution reservoir 6 tops are provided with distribution reservoir, and 6 liang of side guards of precipitation distribution reservoir are established triangle overfalling weir 23, and precipitation distribution reservoir 6 is 7 water distributions of multimedium hollow billet filtration system by distributing pipe line.
1, described collecting tank 1 is connected by first perforated board 11 with sedimentary adjustive pool 2, hole is respectively 35cm, 40cm, 45cm and 50cm apart from reactor head and is respectively 30cm, 35cm, 40cm and 45cm apart from the plate top, aperture 15mm, pitch of holes 50mm, first perforated board 11 is installed in apart from reactor head 50mm place, be used for gas flow and alleviate the instantaneous water yield impacting
2, described sedimentary adjustive pool 2 links to each other with anaerobically fermenting pond 3 by second perforated board 12, hole is respectively 37.5cm, 42.5cm and 47.5cm apart from reactor head and is respectively 27.5cm, 42.5cm and 47.5cm apart from the plate top, aperture 15mm, pitch of holes 50mm, perforated board is installed in apart from reactor head 100mm place, 12 punchings place of second perforated board are provided with the water yield adjusting plate 16 that is used to regulate current, are used to regulate current;
3, described anaerobic fermentating groove 3 is made up of downstream room and upstream room, wherein the upstream room filling pore is the polyamine fat filler 17 of 3-5mm and 0.3-0.5mm, the downstream room of anaerobic fermentating groove links by the upstream room of perforated board and anaerobism filter vat, hole is respectively 40cm and 45cm apart from reactor head and is respectively 30cm and 35cm apart from the plate top, aperture 15mm, pitch of holes 50mm, perforated board are installed in apart from reactor head 100mm place; Sewage is by behind the polyamine fat filler, and most of organism is removed.
4, be provided with topping-up pump in the described supercharging pond, will compare settled sewage and promote, become pressure current and spray, form atomizing effect, utilize the sunlight that sees through glass cover-plate, fully contact, react, the increase reaction effect with photocatalyst by sump pump.
5, the glass cover-plate 20 of described photochemical catalysis filtering basin 5 has a gap plate 19, is placing the haydite 21 that scribbles photocatalyst on the gap plate 19.Sewage becomes the liquid mist by special nozzle ejection, abundant and photocatalyst contact reacts in the decline process, and inorganic pollutant is decomposed by redox mechanism in contact process, pathogenic agent and worm's ovum death.Because need having the UV-light of special wavelength, intensifies by photocatalyst, because the UV-light of occurring in nature possesses These characteristics, so we select sunlight as a kind of stable, secular light source.In pool construction, pond lamina tecti material uses toughened glass, promptly satisfies the printing opacity requirement and also has certain intensity.
6, described precipitation distributing trough top is provided with distribution reservoir.Distribution reservoir distance from bottom reactor head 47.5cm, distribution reservoir two side guards are established triangle overflow weir 23, the overfalling weir base angle is apart from reactor head 40cm, overflow triangle height of weir 50mm, the precipitation distributing trough is the water distribution of multimedium hollow billet diafiltration module by the distributing pipe line that is provided with the distribution reservoir bottom, precipitation distribution reservoir 6 tops are sealed separately, and the side is provided with ventage, and this ventage links to each other and can control by valve with the breather line of multimedium filtering layer by pipeline.
7, to soak into system's 7 bottom design be trapezoidal for described multimedium hollow billet, to save filtrate.Adopt the pvc pipe water distribution, water distributor is connected on the 45cm place, coats with the 2cm gravel bed around the water distributor, and is provided with filter screen (thick 3-5mm, hole 0.1mm) and backfill soil separation.The 10cm place is provided with the cloth pond that is made of waterproof cloth 24 below water distributor 26, and the cloth pond is a ladder structure, following bottom width 30cm, last bottom width 50cm, high 30cm; The top layer is primary medium layer 25, the multimedium filter layer of primary medium layer 25 bottoms mainly comprises air-and water-permeable layer 30 and multimedium filtering layer 29, the filtrate of air-and water-permeable layer 30 is that 1-2mm yellow sand and particle diameter are that the coal ash slag of 1-3mm is formed by particle diameter, and its part by weight is a yellow sand: lime-ash is 80: 20; The weight proportion of the filtrate of multimedium filtering layer 29 is primary medium: modified zeolite: lime-ash: filtrate=80: 8: 8: 4; The layer 28 that catchments is the gravel of particle diameter 2-3cm, at layer 28 place that catchment header 27 is set, header 27 external parcel polyamine fat filter screens, and header 27 water outlets enter pump well 10.
8, cover plate is established on multi-functional baffled reactor top, and by the flange sealing, the side is provided with ventage 22 and links to each other with airway 9, is transported to multimedium hollow billet filtration system 7 through airway 9, carries out the deodorization processing.Top, photochemical catalysis composite reaction pond is provided with can be by the cover plate of flange sealing, and the side is provided with ventage and links to each other with airway, is transported to multimedium hollow billet filtration system through airway 9, carries out deodorization and handles.Device can be made with polypropylene material or other mechanically resistant materials in multi-functional baffled reactor and photochemical catalysis composite reaction pond.
9, PVC permeability cell 15 is inserted in top, water distributor 26 gravel districts and communicates with water distributor 26, is used to hollow billet to soak into the tonifying Qi oxygenation, and ventilation continuously in 24 hours increases the dissolved oxygen of liquid in the air-permeable layer, strengthens the aerobic microbiological activity.
The utility model utilizes light-catalysed redoxomorphism, biological inoculum to divide the hollow billet transudation of desorption and multimedium filtrate, and effectively the organism in the degradation of sewage decomposes the macromolecular particle thing and the elements such as nitrogen, phosphorus that absorb in the sewage.
The structural advantage of the utility model:
1. treatment effect is stable, suitability is strong: this technology adopts metabolic function, the redox reaction of photocatalyst in water and the hollow billet transudation of multimedium filtrate of microorganism, objectionable impurities in the middle of fast and effeciently purifying waste water, the water outlet effect is very stable.
2. working cost is little: utilize the water body run by gravity substantially in the middle of the whole process of this technology, only cause the sewage spraying with topping-up pump when photochemical catalysis, promote treatment effect.
3. the scarfing cinder cycle is long, easy to maintenance: this technology need not the personal management, for the user has saved overhead charges.
4. can realize sewage recycling, not produce any pollution: the up to standard and energy reuse of this technology water outlet, can carry out freshwater aquiculture, water plant planting etc., in the conserve water resource, can produce certain economic benefits.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (8)
1, the photochemical catalysis and the multimedium advanced treatment system of a kind of rural area single household sanitary sewage, it is characterized in that: this system soaks into system (7) by multi-functional baffled reactor, photochemical catalysis composite reaction pond and multimedium hollow billet and forms, and wherein multi-functional baffled reactor is made up of collecting tank (1), sedimentary adjustive pool (2), anaerobically fermenting pond (3); Photochemical catalysis composite reaction pond is made up of supercharging pond (4), photochemical catalysis filtering basin (5) and precipitation distribution reservoir (6); The water-in of collecting tank (1) is connected with the collection pipe network, is connected with sedimentary adjustive pool (2) by first perforated board (11); Sedimentary adjustive pool (2) links to each other with anaerobically fermenting pond (3) by second perforated board (12); Anaerobically fermenting pond (3) is divided into upstream room and downstream room, and upstream room is filled filler, and downstream room links by the upstream room of the 3rd perforated board (13) with anaerobism filtering basin (3); Topping-up pump (14) and the penstock (18) of sewage in supercharging pond (4) forms water smoke by shower nozzle then and enters photochemical catalysis filtering basin (5); Precipitation distribution reservoir (6) top is provided with distribution reservoir, and precipitation distribution reservoir (6) two side guards are established triangle overfalling weir (23), and precipitation distribution reservoir (6) is multimedium hollow billet filtration system (7) water distribution by distributing pipe line.
2, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage is characterized in that: first perforated board (11) is used for gas flow and alleviates the instantaneous water yield impacting; Second perforated board (12) punching place is provided with the water yield adjusting plate (16) that is used to regulate current.
3, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage is characterized in that: what anaerobically fermenting pond (3) upstream room was filled is the polyamine fat filler (17) that hole is respectively 3-5mm and 0.3-0.5mm.
4, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage, it is characterized in that: the glass cover-plate (20) of photochemical catalysis filtering basin (5) has a gap plate (19), is placing the haydite (21) that scribbles photocatalyst on the gap plate (19).
5, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage, it is characterized in that: cover plate is established on multi-functional baffled reactor top, seal by flange, the side is provided with ventage (22) and links to each other with airway (9), be transported to multimedium hollow billet filtration system (7) through airway (9), carry out deodorization and handle.
6, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage is characterized in that: precipitation distribution reservoir (6) top is sealed separately, and the side is provided with can be by the ventage of valve control.
7, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage, it is characterized in that: the bottom that the multimedium hollow billet soaks into system (7) is trapezoidal, adopt the pvc pipe water distribution, coat with gravel bed on every side, and be provided with filter screen and backfill soil and separate, in water distributor (26) below the cloth pond that is made of waterproof cloth (24) is set, the cloth pond is a ladder structure; The top layer is primary medium layer (25), the multimedium filter layer of primary medium layer (25) bottom mainly comprises air-and water-permeable layer (30) and multimedium filtering layer (29), the filtrate of air-and water-permeable layer (30) is that 1-2mm yellow sand and particle diameter are that the coal ash slag of 1-3mm is formed by particle diameter, and its part by weight is a yellow sand: lime-ash is 80: 20; The weight proportion of the filtrate of multimedium filtering layer (29) is primary medium: modified zeolite: lime-ash: filtrate=80: 8: 8: 4; The layer (28) that catchments is the gravel of particle diameter 2-3cm, locates to be provided with header (27) at the layer (28) that catchments, header (27) external parcel polyamine fat filter screen, and header (27) water outlet enters pump well (10).
8, the photochemical catalysis and the multimedium advanced treatment system of rural area according to claim 1 single household sanitary sewage, it is characterized in that: PVC permeability cell (15) is inserted in top, water distributor (26) gravel district and communicates with water distributor (26), is used to hollow billet to soak into the tonifying Qi oxygenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201844243U CN201106009Y (en) | 2007-10-16 | 2007-10-16 | Photocatalysis and multi-medium deep treatment system for country single-family living sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201844243U CN201106009Y (en) | 2007-10-16 | 2007-10-16 | Photocatalysis and multi-medium deep treatment system for country single-family living sewage |
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| Publication Number | Publication Date |
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| CN201106009Y true CN201106009Y (en) | 2008-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201844243U Expired - Lifetime CN201106009Y (en) | 2007-10-16 | 2007-10-16 | Photocatalysis and multi-medium deep treatment system for country single-family living sewage |
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| CN (1) | CN201106009Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172740B (en) * | 2007-10-16 | 2010-04-21 | 封华强 | Sanitary sewage photocatalysis and multi- medium advanced treatment system for single family in countryside |
| CN102259982A (en) * | 2011-07-09 | 2011-11-30 | 桂林理工大学 | Water distribution device for strengthened land domestic sewage treatment |
| CN104843947A (en) * | 2015-05-18 | 2015-08-19 | 浙江大学 | Horizontal photo-catalysis short-range denitrification coupling anaerobic ammonia oxidation reactor |
| CN111252891A (en) * | 2020-01-21 | 2020-06-09 | 秦皇岛同力达环保能源股份有限公司 | Denitrification treatment process for sewage treatment and water distribution and air supply device used in same |
-
2007
- 2007-10-16 CN CNU2007201844243U patent/CN201106009Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172740B (en) * | 2007-10-16 | 2010-04-21 | 封华强 | Sanitary sewage photocatalysis and multi- medium advanced treatment system for single family in countryside |
| CN102259982A (en) * | 2011-07-09 | 2011-11-30 | 桂林理工大学 | Water distribution device for strengthened land domestic sewage treatment |
| CN102259982B (en) * | 2011-07-09 | 2012-09-05 | 桂林理工大学 | Water distribution device for strengthened land treatment for domestic sewage |
| CN104843947A (en) * | 2015-05-18 | 2015-08-19 | 浙江大学 | Horizontal photo-catalysis short-range denitrification coupling anaerobic ammonia oxidation reactor |
| CN104843947B (en) * | 2015-05-18 | 2016-07-27 | 浙江大学 | Horizontal photocatalysis short-cut denitrification coupling anaerobic ammonia oxidation reactor |
| CN111252891A (en) * | 2020-01-21 | 2020-06-09 | 秦皇岛同力达环保能源股份有限公司 | Denitrification treatment process for sewage treatment and water distribution and air supply device used in same |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080827 Effective date of abandoning: 20071016 |