CN112047463A - Denitrification filter tank system - Google Patents
Denitrification filter tank system Download PDFInfo
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- CN112047463A CN112047463A CN202010721814.XA CN202010721814A CN112047463A CN 112047463 A CN112047463 A CN 112047463A CN 202010721814 A CN202010721814 A CN 202010721814A CN 112047463 A CN112047463 A CN 112047463A
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- Prior art keywords
- tank
- valve body
- mixing
- pond
- biochemical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 239000002351 wastewater Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 31
- 238000012216 screening Methods 0.000 claims description 24
- 238000004062 sedimentation Methods 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 17
- 238000005086 pumping Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000011001 backwashing Methods 0.000 claims description 5
- 230000003028 elevating effect Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to a denitrification filter system, which is characterized in that: including former water tank of municipal sewage, reserve tank, biochemical pond, two heavy ponds, mixed pond, denitrification filtering pond, back flush wastewater disposal basin and clean water basin, biochemical pond pass through three way valve and link to each other with former water tank of municipal sewage and reserve tank respectively, biochemical pond still link to each other with the air compressor machine through the pressurization pipeline, two heavy ponds pass through outlet conduit and link to each other with biochemical pond, biochemical pond's bottom still be provided with the pressure valve, the pressure valve pass through reserve outlet pipe and two heavy ponds and link to each other, two heavy ponds pass through two heavy pond outlet pipes and link to each other with mixed pond, two heavy pond outlet pipes on install the suction pump, mixed pond pass through mixed pond outlet pipe and the denitrification filtering pond and link to each other, the denitrification filtering pond still link to each other with back flush wastewater disposal basin and clean water basin respectively. The design has the advantages of simple structure, easy manufacture, practicality and high efficiency.
Description
Technical Field
The invention relates to the technical field of biological sewage treatment, in particular to a denitrification filter tank system.
Background
With the gradual increase of the sewage discharge standard, the upgrading and the reconstruction of the urban sewage treatment plant are imperative, wherein the bottleneck lies in improving the total nitrogen removal effect. In order to protect the environment, domestic sewage plants gradually start to be upgraded and reformed so as to ensure that the effluent quality standard reaches the first class A standard of pollutant discharge Standard of municipal Sewage treatment plant (GB 18918-2002). The removal of total nitrogen is particularly important in the upgrading and reconstruction of sewage plants, and the difficulty and the investment ratio are the greatest.
On the basis of the process modification of a conventional sewage treatment plant, a denitrification treatment unit, such as a fixed biofilm reactor like a denitrification biofilter, is added, and becomes one of effective ways for solving the problem that the total nitrogen removal in the prior art does not reach the standard. The denitrification basic principle of the denitrification biological filter is that denitrification bacteria in a biological membrane reduce nitrate nitrogen of inlet water into nitrogen by using organic matters as a carbon source so as to achieve the purpose of removing total nitrogen; in addition, the filter tank also has the function of filtration and interception, and the SS of the effluent is reduced. The technology has the advantages of large biomass, various functions, flexible process, less occupied area and the like.
The existing A2O + denitrification filter tank process for upgrading and transforming urban sewage has the following problems: 1) a large amount of carbon sources are required to be added in the denitrification process of the denitrification filter tank, so that the operation cost of a sewage plant is greatly increased; 2) in the A2O aerobic zone, the nitrification rate is reduced along with the reduction of the water temperature in winter, so that the ammonia nitrogen in the effluent exceeds the standard; 3) the aerobic nitrification aeration of the A2O biochemical pool has large energy consumption and the like. Therefore, a denitrification filter tank denitrification device with high denitrification efficiency and low operation cost is required, and has important significance for guiding the upgrading and the reconstruction of a sewage plant and meeting the requirement of high-quality water discharge.
Disclosure of Invention
The invention provides a denitrification filter tank system, wherein a stirring mechanism is arranged in a mixing tank, the mixing is accelerated through the stirring mechanism, the working efficiency of the denitrification filter tank system is improved, a screening cylinder is arranged in the mixing tank, impurities in water are automatically removed through the screening cylinder in the mixing process, and the practicability of the denitrification filter tank system is improved.
In order to solve the technical problem, the invention provides a denitrification filter system, which is characterized in that: the device comprises a municipal sewage raw water tank, a spare water tank, a biochemical tank, a secondary sedimentation tank, a mixing tank, a denitrification filter tank, a backwashing wastewater tank and a clean water tank, wherein an overflow port is formed in the side wall of the upper end of the municipal sewage raw water tank, the overflow port is connected with the spare water tank through an overflow pipeline, the overflow pipeline is inclined towards the spare water tank, the biochemical tank is respectively connected with the municipal sewage raw water tank and the spare water tank through a three-way valve, the biochemical tank is also connected with an air compressor through a pressurization pipeline, the secondary sedimentation tank is connected with the biochemical tank through a water outlet pipeline, the bottom of the biochemical tank is also provided with a pressure valve, the pressure valve is connected with the secondary sedimentation tank through a spare water outlet pipe, the secondary sedimentation tank is connected with the mixing tank through a secondary sedimentation tank water outlet pipe, a water outlet pipe of the secondary sedimentation tank is provided with a water suction pump, and the mixing tank is connected with the denitrification filter tank, the denitrification filter tank is also respectively connected with a back flush wastewater tank and a clean water tank.
Further: and a liquid pumping pipeline is also arranged between the standby water tank and the urban sewage original water tank, and a liquid pumping pump is installed on the liquid pumping pipeline.
And further: the pressure valve comprises a first valve body, a second valve body, a valve core and a spring, wherein one end of the first valve body is open, and the other end of the first valve body is hermetically sealed, the open end of the first valve body is fixed at the bottom of the biochemical pool and communicated with the biochemical pool, the valve core is connected into the first valve body through the spring, one end of the second valve body is sleeved outside the first valve body and sealed with the first valve body, the other end of the second valve body is connected with a standby water outlet pipe, a gap is reserved between the outer wall of the first valve body and the inner wall of the second valve body, a through hole is formed in the outer wall of the first valve body, and the through hole is communicated with the gap and sealed through the valve core.
And further: the mixing tank in be provided with rabbling mechanism, the outside of rabbling mechanism set up the screening barrel, the screening barrel sieve mesh of evenly having arranged all around, the mixing tank in the bottom be provided with the connecting seat that is used for connecting the screening barrel, the lower extreme of screening barrel through the elevating system swing joint who sets up in the mixing tank in the connecting seat, the top of connecting seat seted up with screening barrel lower extreme assorted connecting hole, the one end of two heavy ponds outlet pipes stretch into to the connecting hole from the bottom of mixing tank.
And further: the stirring mechanism comprises a stirring motor, a stirring shaft, a stirring frame and a connecting barrel body, wherein the stirring motor is fixed at the bottom of a mixing pool in a connecting hole, the stirring shaft is connected with an output shaft end of the stirring motor, the stirring shaft is sequentially connected with two connecting barrel bodies, three stirring frames are connected around each connecting barrel body, the outer wall of the stirring shaft is provided with external threads, the external threads on the upper side and the lower side of each connecting barrel body are respectively connected with an adjusting nut, and the connecting barrel bodies are fixed on the stirring shaft through the adjusting nuts on the upper side and the lower side.
And further: elevating system include servo motor, lead screw, animation, connecting piece and guide arm, servo motor and guide arm fix the bottom in mixing the pond respectively, the guide arm vertically place, lead screw and guide arm be parallel to each other and link to each other with servo motor, the screening barrel pass through the connecting piece and link to each other with the animation, the animation connect on the lead screw, the connecting piece on seted up with guide arm assorted guiding hole.
After the structure is adopted, the stirring mechanism is arranged in the mixing tank, the mixing is accelerated through the stirring mechanism, the working efficiency of the mixing tank is improved, the screening cylinder is arranged in the mixing tank, impurities in water are automatically removed through the screening cylinder in the mixing process, and the practical performance of the mixing tank is improved; and the design also has the advantages of simple structure, easy manufacture, practicality and high efficiency.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a structural view of the pressure valve.
Fig. 3 is a structural view of the stirring mechanism.
Detailed Description
As shown in figure 1, a denitrification filter system comprises a municipal sewage raw water tank 1, a spare water tank 2, a biochemical tank 3, a secondary sedimentation tank 4, a mixing tank 5, a denitrification filter 6, a backwashing wastewater tank 7 and a clean water tank 8, wherein the upper side wall of the municipal sewage raw water tank is provided with an overflow port, the overflow port is connected with the spare water tank through an overflow pipeline 9, the overflow pipeline is inclined towards the spare water tank, the biochemical tank is respectively connected with the municipal sewage raw water tank and the spare water tank through a three-way valve 13, the biochemical tank is also connected with an air compressor 14 through a pressurizing pipeline 15, the secondary sedimentation tank is connected with the biochemical tank through an outlet pipeline 16, the bottom of the biochemical tank is also provided with a pressure valve 18, the pressure valve is connected with the secondary sedimentation tank through a spare outlet pipe 17, the secondary sedimentation tank is connected with the mixing tank through a secondary sedimentation tank outlet pipe 19, the water outlet pipe of the secondary sedimentation tank is provided with a water suction pump, the mixing tank is connected with the denitrification filter tank through a water outlet pipe 20 of the mixing tank, and the denitrification filter tank is also connected with a backwashing wastewater tank and a clean water tank respectively. The design has the advantages of simple structure, easy manufacture, practicality and high efficiency.
A liquid-pumping pipeline 10 is also arranged between the standby water tank and the raw urban sewage tank as shown in fig. 1, and a liquid-pumping pump 11 is installed on the liquid-pumping pipeline.
The pressure valve shown in fig. 2 comprises a first valve body 18-1, a second valve body 18-2, a valve core 18-3 and a spring 18-5, wherein one end of the first valve body is open, and the other end of the first valve body is sealed, the open end of the first valve body is fixed at the bottom of the biochemical pool and communicated with the biochemical pool, the valve core is connected in the first valve body through the spring, one end of the second valve body is sleeved outside the first valve body and sealed with the first valve body, the other end of the second valve body is connected with a standby water outlet pipe, a gap is reserved between the outer wall of the first valve body and the inner wall of the second valve body, a through hole 18-4 is formed in the outer wall of the first valve body, and the through hole is communicated with the gap and sealed through the valve core.
As be provided with rabbling mechanism in the mixed pond shown in fig. 3, rabbling mechanism's the outside set up screening barrel 21, the screening barrel sieve mesh 21-1 of evenly having arranged all around, the mixed pond in the bottom be provided with the connecting seat 22 that is used for connecting the screening barrel, the lower extreme of screening barrel through the elevating system swing joint who sets up in the mixed pond in the connecting seat, the top of connecting seat seted up with screening barrel lower extreme assorted connecting hole, the one end of secondary sedimentation pond outlet pipe stretch into to the connecting hole from the bottom of mixed pond. The mixing tank is internally provided with the stirring mechanism, so that the mixing is accelerated through the stirring mechanism, the working efficiency of the mixing tank is improved, and the screening cylinder is arranged in the mixing tank, so that impurities in water are automatically removed through the screening cylinder in the mixing process, and the practicability of the mixing tank is improved.
The stirring mechanism shown in fig. 3 comprises a stirring motor 23, a stirring shaft 24, a stirring frame 25 and a connecting cylinder 26, wherein the stirring motor is fixed at the bottom of a mixing pool in a connecting hole, the stirring shaft is connected with the shaft outlet end of the stirring motor, the stirring shaft is sequentially connected with two connecting cylinders, three stirring frames are connected around each connecting cylinder, the outer wall of the stirring shaft is provided with external threads, the external threads on the upper side and the lower side of each connecting cylinder are respectively connected with an adjusting nut 27, and the connecting cylinders are fixed on the stirring shaft through the adjusting nuts on the upper side and the lower side.
The lifting mechanism shown in fig. 3 comprises a servo motor 29, a lead screw 31, a flexible 30, a connecting piece 32 and a guide rod 28, wherein the servo motor and the guide rod are respectively fixed at the bottom of the mixing tank, the guide rod is vertically arranged, the lead screw and the guide rod are parallel to each other and are connected with the servo motor, the screening cylinder body is connected with the flexible through the connecting piece, the flexible is connected to the lead screw, and the connecting piece is provided with a guide hole matched with the guide rod.
Claims (6)
1. A denitrification filter system is characterized in that: comprises a municipal sewage raw water tank (1), a spare water tank (2), a biochemical tank (3), a secondary sedimentation tank (4), a mixing tank (5), a denitrification filter tank (6), a backwashing wastewater tank (7) and a clean water tank (8), wherein the upper side wall of the municipal sewage raw water tank is provided with an overflow port, the overflow port is connected with the spare water tank through an overflow pipeline (9), the overflow pipeline is inclined towards the spare water tank, the biochemical tank is respectively connected with the municipal sewage raw water tank and the spare water tank through a three-way valve (13), the biochemical tank is also connected with an air compressor (14) through a pressurizing pipeline (15), the secondary sedimentation tank is connected with the biochemical tank through a water outlet pipeline (16), the bottom of the biochemical tank is also provided with a pressure valve (18), the pressure valve is connected with the secondary sedimentation tank through a spare water outlet pipe (17), the secondary sedimentation tank is connected with the mixing tank through a secondary sedimentation tank water outlet pipe (19), the water outlet pipe of the secondary sedimentation tank is provided with a water suction pump, the mixing tank is connected with the denitrification filter tank through a water outlet pipe (20) of the mixing tank, and the denitrification filter tank is also connected with a backwashing wastewater tank and a clean water tank respectively.
2. A denitrification filter system according to claim 1, wherein: a liquid pumping pipeline (10) is further arranged between the standby water tank and the urban sewage original water tank, and a liquid pumping pump (11) is mounted on the liquid pumping pipeline.
3. A denitrification filter system according to claim 1, wherein: the pressure valve comprises a first valve body (18-1), a second valve body (18-2), a valve core (18-3) and a spring (18-5), wherein one end of the first valve body is open, and the other end of the first valve body is sealed, the open end of the first valve body is fixed at the bottom of the biochemical pool and communicated with the biochemical pool, the valve core is connected into the first valve body through the spring, one end of the second valve body is sleeved outside the first valve body and sealed with the first valve body, the other end of the second valve body is connected with a standby water outlet pipe, a gap is reserved between the outer wall of the first valve body and the inner wall of the second valve body, a through hole (18-4) is formed in the outer wall of the first valve body, and the through hole is communicated with the gap and sealed through the valve core.
4. A denitrification filter system according to claim 1, wherein: the mixing tank in be provided with rabbling mechanism, rabbling mechanism's the outside set up screening barrel (21), the screening barrel sieve mesh (21-1) of evenly having arranged all around, the mixing tank in the bottom be provided with connecting seat (22) that are used for connecting the screening barrel, the lower extreme of screening barrel through set up elevating system swing joint in the mixing tank in the connecting seat, the top of connecting seat seted up with screening barrel lower extreme assorted connecting hole, the one end of two heavy ponds outlet pipe stretch into to the connecting hole from the bottom of mixing tank.
5. A denitrification filter system according to claim 4, wherein: rabbling mechanism include agitator motor (23), (mixing) shaft (24), stirring frame (25) and connecting barrel (26), agitator motor fix the bottom in the mixed pond in the connecting hole, the (mixing) shaft link to each other with agitator motor's play axle head, the (mixing) shaft on have connected gradually two connecting barrel, every connecting barrel all is connected with three stirring frame all around, the outer wall of (mixing) shaft on be provided with external screw thread, respectively be connected with an adjusting nut (27) on the external screw thread of both sides about every connecting barrel, connecting barrel fix on the (mixing) shaft through the adjusting nut of upper and lower both sides.
6. A denitrification filter system according to claim 4, wherein: elevating system include servo motor (29), lead screw (31), flexible (30), connecting piece (32) and guide arm (28), servo motor and guide arm fix the bottom in mixing the pond respectively, the guide arm vertically place, lead screw and guide arm be parallel to each other and link to each other with servo motor, the screening barrel pass through the connecting piece and link to each other with the flexible, the flexible connect on the lead screw, the connecting piece on seted up with guide arm assorted guiding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010721814.XA CN112047463A (en) | 2020-07-24 | 2020-07-24 | Denitrification filter tank system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010721814.XA CN112047463A (en) | 2020-07-24 | 2020-07-24 | Denitrification filter tank system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112047463A true CN112047463A (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010721814.XA Pending CN112047463A (en) | 2020-07-24 | 2020-07-24 | Denitrification filter tank system |
Country Status (1)
| Country | Link |
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| CN (1) | CN112047463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115520964A (en) * | 2022-09-28 | 2022-12-27 | 旭彤环保科技南通有限公司 | Denitrification filter tank capable of realizing automatic backwashing and use method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2867182A1 (en) * | 2004-03-04 | 2005-09-09 | Lyonnaise Eaux France | Process of treatment of a water charged of nitrates, useful denitrification of water, comprises denitration of water carried out on ion exchange resin and biological treatment with bacteria to reduce the nitrates in gaseous nitrogen |
| KR20140054732A (en) * | 2012-10-29 | 2014-05-09 | 김숙희 | Method and arrangement for manufacturing functional feed and liquid fertilizer from food waste by using saccharization-decomposition processing apparatus |
| CN109160670A (en) * | 2018-08-21 | 2019-01-08 | 海南大学 | It is a kind of based on short-cut denitrification+Anammox municipal sewage denitrification filter pool denitrogenation method |
| CN209093219U (en) * | 2018-11-20 | 2019-07-12 | 鲁南煤化工研究院 | A kind of coal chemical industry waste water agitating device |
| CN210196559U (en) * | 2019-06-11 | 2020-03-27 | 江苏新海石化有限公司 | Novel flow control valve |
| CN210736445U (en) * | 2019-05-09 | 2020-06-12 | 江苏福莱特环境技术有限公司 | Novel concentrated water recovery treatment equipment |
| CN210974159U (en) * | 2019-11-11 | 2020-07-10 | 苏州红昇环保科技有限公司 | Unpowered mixed equalizing basin |
-
2020
- 2020-07-24 CN CN202010721814.XA patent/CN112047463A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2867182A1 (en) * | 2004-03-04 | 2005-09-09 | Lyonnaise Eaux France | Process of treatment of a water charged of nitrates, useful denitrification of water, comprises denitration of water carried out on ion exchange resin and biological treatment with bacteria to reduce the nitrates in gaseous nitrogen |
| KR20140054732A (en) * | 2012-10-29 | 2014-05-09 | 김숙희 | Method and arrangement for manufacturing functional feed and liquid fertilizer from food waste by using saccharization-decomposition processing apparatus |
| CN109160670A (en) * | 2018-08-21 | 2019-01-08 | 海南大学 | It is a kind of based on short-cut denitrification+Anammox municipal sewage denitrification filter pool denitrogenation method |
| CN209093219U (en) * | 2018-11-20 | 2019-07-12 | 鲁南煤化工研究院 | A kind of coal chemical industry waste water agitating device |
| CN210736445U (en) * | 2019-05-09 | 2020-06-12 | 江苏福莱特环境技术有限公司 | Novel concentrated water recovery treatment equipment |
| CN210196559U (en) * | 2019-06-11 | 2020-03-27 | 江苏新海石化有限公司 | Novel flow control valve |
| CN210974159U (en) * | 2019-11-11 | 2020-07-10 | 苏州红昇环保科技有限公司 | Unpowered mixed equalizing basin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115520964A (en) * | 2022-09-28 | 2022-12-27 | 旭彤环保科技南通有限公司 | Denitrification filter tank capable of realizing automatic backwashing and use method thereof |
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Application publication date: 20201208 |
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