CN209456161U - Denitrification dephosphorization apparatus - Google Patents
Denitrification dephosphorization apparatus Download PDFInfo
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- CN209456161U CN209456161U CN201822193392.4U CN201822193392U CN209456161U CN 209456161 U CN209456161 U CN 209456161U CN 201822193392 U CN201822193392 U CN 201822193392U CN 209456161 U CN209456161 U CN 209456161U
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- processing pond
- drip irrigation
- fixed
- denitrification dephosphorization
- water
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Abstract
The utility model provides denitrification dephosphorization apparatus, water inlet is offered in processing pond, inlet pipeline is connected with water inlet, filter screen is fixed in the processing pond below water inlet, agitating device is located at the bottom end of processing pond, aquatile floating bed is swum in processing pond, elevator pump is arranged in processing pond, lift line is connected with elevator pump, lift line is connected with drip irrigation appliance, separate mesh is fixed on the top of collecting-tank, the top setting filtering adsorption zone of separate mesh, filter filled natural zeolite in adsorption zone, on the top of filtering adsorption zone, terrestrial organism growing area is set, soil needed for filling plant grows in terrestrial organism growing area, and plant terrestrial plant, biochemical filler device is additionally provided in collecting-tank.Its treatment effeciency is improved to carry out removing operation to the nitrogen phosphorus in polluted-water using the collective effect of aquatile, terrestrial organism and biologic packing material, it is more environmentally protective to denitrogenation dephosphorizing process.
Description
Technical field
The utility model relates to sewage-treatment plant technical fields, more specifically to a kind of denitrification dephosphorization apparatus.
Background technique
Meat processing waste water contain a large amount of blood stains, grease, oil clot, hair, meat bits, internal organ sundries, indigested foodstuff and
The pollutants such as excrement, appearance is in undesirable blood red, and has the unpleasant smell of blood, in addition, useless in meat packing
In water, also containing bacteriums related with human health such as fecal coli, fecal strep level-one salmonellas, but generally not
Contain noxious material；Pollutant contained by meat processing waste water is mainly the organic matter for being in the physical aspects such as dissolution, colloid and suspension
Mainly there are Ph, BOD, COD, SS etc. in matter, contamination index, and in addition there are total nitrogens, organic nitrogen, ammonia nitrogen, nitrate nitrogen, total solid, total
Phosphorus, sulfate radical, sulfide and total alkalinity etc..
Meat processing waste water is if only only carry out precipitating filtering to sundries such as grease, the meat bits wherein to suspend, gained is useless
Water pollutant content is exceeded, after need to handling wherein exceeded nitrogen phosphorus, could reuse or be emitted into natural water body
In, existing nitrogen phosphorus processing method generally use biological treatment or into sewage be added ammonia nitrogen removal agent it is extra in water body to remove
Nitrogen phosphorus, still, biological treatment process is complicated, and treatment effeciency is low, and sewage after treatment there are still nitrogen phosphorus it is exceeded can
Can, and ammonia nitrogen removal agent is added into sewage, since ammonia nitrogen removal agent is chemical substance, reaction is handled to the nitrogen phosphorus in water body
Very rapidly, but due in sewage nitrogen and phosphorus content be not quite similar, the input amount of ammonia nitrogen removal agent needs to test precise determination, such as
The very few nitrogen and phosphorus content that will lead to of additional amount is exceeded, and additional amount excessively can then lead to the problem of other, influences the treatment effect of sewage.
Utility model content
The utility model overcomes deficiency in the prior art, and existing denitrification and dephosphorization method process is complicated, treatment effeciency
It is low, and the possibility that sewage after treatment is exceeded there are still nitrogen phosphorus, a kind of denitrification dephosphorization apparatus is provided, aquatic life is utilized
Object, terrestrial organism and biologic packing material collective effect, to carry out removing operation to the nitrogen phosphorus in polluted-water, improve its processing effect
Rate, it is more environmentally protective to denitrogenation dephosphorizing process.
The purpose of this utility model is achieved by following technical proposals.
Denitrification dephosphorization apparatus, including water plant processing unit, lifting device, drip irrigation appliance and terrestrial plant processing dress
It sets, the water plant processing unit includes processing pond, inlet pipeline, filter screen, agitating device and aquatile floating bed, described
Water inlet is offered in processing pond, the inlet pipeline is connected with the water inlet, and the filter screen is fixed on the water inlet
In the processing pond below mouthful, the bottom end of the processing pond, the aquatile floating bed floating is arranged in the agitating device
In the processing pond, and it is located on the filter screen,
The lifting device includes elevator pump and lift line, and the elevator pump is arranged in the processing pond, described to mention
Riser road is connected with the elevator pump, and the lift line is connected with the drip irrigation appliance,
The terrestrial plant processing unit includes terrestrial plant growing area, filters adsorption zone, separate mesh and collecting-tank, described
Separate mesh is fixed on the top of the collecting-tank, and the filtering adsorption zone, the filtering absorption is arranged in the top of the separate mesh
The terrestrial plant growing area, the terrestrial plant kind is arranged on the top of the filtering adsorption zone in filled natural zeolite in area
Soil needed for filling plant grows in growing area, and terrestrial plant is planted, biochemical filler device is additionally provided in the collecting-tank,
The biochemical filler device includes aerating pipelines, aeration branch pipe, air blower and biologic packing material net cage, the aeration tube routing up to
Under be vertically arranged in the collecting-tank, the aeration branch pipe is uniformly arranged on the aeration tube road, the air blower passes through
Pipeline is connected with the inlet end on the aeration tube road, and the biologic packing material net cage is fixed on the outside on the aeration tube road,
The bottom end of the collecting-tank is provided with drain water circuit.
The agitating device includes stirring motor, shaft, lower conical gear, upper conical gear, agitating shaft and stirring blade,
The stirring motor setting is in the processing pond Basolateral, the output shaft of the stirring motor and through the processing pond side
And with the processing pond other side rotation connection shaft be fixedly linked, the lower conical gear is socketed in the shaft,
The upper conical gear is fixed on the bottom end of the agitating shaft, and in the agitating shaft outer sheath joint bearing, the bearing passes through solid
Fixed rack and the inner wall of the processing pond are mutually fixed, and the upper conical gear and the lower conical gear are meshed, and are stirred described
It mixes and is fixed with stirring blade on axis.
The quantity of the lower conical gear and the upper conical gear is 2-4.
The quantity of the stirring blade is 2-3.
The aquatile floating bed includes floating body, flowerpot, biomimetic type filler and water plant, is opened in the middle part of the floating body
If centre bore, the flowerpot is mounted in the centre bore, and the basin bottom of the flowerpot is hollow mesh structure, in the flowerpot
Filled with the biomimetic type filler, the aquatile is planted in the biomimetic type filler.
There is connecting hole in the edge of the floating body, passes through rope between the adjacent floating body and run through the connecting hole
It is connected.
The biomimetic type filler uses haydite.
The drip irrigation appliance includes drip irrigation pipe, trickle irrigation mouth, interior fixed net, outer fixed net, buffering cotton and vortex board, the drop
It fills pipe to be connected with the lift line, the trickle irrigation mouth is uniformly provided on the horizontal segment of the drip irrigation pipe, the vortex board
It is arranged in the tube wall of the drip irrigation pipe, and the side of the vortex board is the trickle irrigation mouth, it is opposite on the trickle irrigation mouth to set
It is equipped with the interior fixed net and the outer fixed net, the buffering cotton is placed on the interior fixed net and the outer fixed net
Between.
The vortex board is inclined on the inner wall of the drip irrigation pipe, and the vortex board is the knot of concavo-convex
The trickle irrigation mouth, the entrance of the concave side of the vortex board and the drip irrigation pipe is arranged in the convex surface side of structure, the vortex board
Relatively.
Angle between the vortex board and the inner wall of the drip irrigation pipe is 45-60 °, the vortex board and the trickle irrigation mouth
The distance between be 5-10mm.
The utility model has the following beneficial effects: using the root system of aquatile prosperity, it is exceeded in water body to absorb and convert
Nitrogen phosphorus, to achieve the purpose that preliminary purification water quality, but absorb and convert exceeded in water body only by aquatile
Nitrogen phosphorus, converts ratio and transformation efficiency is lower, then the water body Jing Guo preliminary treatment is poured land by way of trickle irrigation
The root system of plant, terrestrial plant carries out after further absorbing the nitrogen phosphorus in water body, after water passes through filter layer, flow to collection
In pond, in collecting-tank under the action of biochemical filler, last biological treatment is carried out to the nitrogen phosphorus in water body, to improve biology
Treatment effeciency guarantees the effect of denitrogenation dephosphorizing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of aquatile floating bed in the utility model；
Fig. 3 is the structural schematic diagram of drip irrigation appliance in the utility model；
In figure: 1 is processing pond, and 2 be inlet pipeline, and 3 be filter screen, and 4 be elevator pump, and 5 be lift line, and 6 plant for terrestrial
Species growing area, 7 be filtering adsorption zone, and 8 be separate mesh, and 9 be collecting-tank, and 10 be aerating pipelines, and 11 be aeration branch pipe, and 12 be air blast
Machine, 13 be biologic packing material net cage, and 14 be stirring motor, and 15 be shaft, and 16 be lower conical gear, and 17 be upper conical gear, and 18 are
Agitating shaft, 19 be stirring blade, and 20 be floating body, and 21 be flowerpot, and 22 be biomimetic type filler, and 23 be connecting hole, and 24 be drip irrigation pipe, 25
It is outer fixed net for interior fixed net, 26,27 be buffering cotton, and 28 be vortex board, and 29 be bearing, and 30 be fixed bracket.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
The technical solution of the utility model is further described below by specific embodiment.
Embodiment one
Denitrification dephosphorization apparatus, including water plant processing unit, lifting device, drip irrigation appliance and terrestrial plant processing dress
It sets, water plant processing unit includes processing pond 1, inlet pipeline 2, filter screen 3, agitating device and aquatile floating bed, processing
Water inlet is offered on pond 1, inlet pipeline 2 is connected with water inlet, and filter screen 3 is fixed in the processing pond 1 below water inlet,
The bottom end of processing pond 1 is arranged in agitating device, and aquatile floating bed is swum in processing pond 1, and is located on filter screen 3,
Lifting device includes elevator pump 4 and lift line 5, and elevator pump 4 is arranged in processing pond 1, lift line 5 and promotion
Pump 4 is connected, and lift line 5 is connected with drip irrigation appliance,
Terrestrial plant processing unit includes terrestrial plant growing area 6, filtering adsorption zone 7, separate mesh 8 and collecting-tank 9, is separated
Net 8 is fixed on the top of collecting-tank 9, and the top setting filtering adsorption zone 7 of separate mesh 8 filters filled natural boiling in adsorption zone 7
Terrestrial plant growing area 6 is arranged on the top of filtering adsorption zone 7, soil needed for filling plant growth in terrestrial plant growing area 6 in stone
Earth, and plant terrestrial plant, is additionally provided with biochemical filler device in collecting-tank 9, biochemical filler device include aerating pipelines 10,
Aeration branch pipe 11, air blower 12 and biologic packing material net cage 13, aerating pipelines 10 are from top to bottom vertically arranged in collecting-tank 9,
Aeration branch pipe 11 is uniformly arranged on aerating pipelines 10, air blower 12 is connected by pipeline with the inlet end of aerating pipelines 10, raw
Object filler net cage 13 is fixed on the outside of aerating pipelines 10, and biologic packing material net cage 13 is filled with zeolite, flyash or bentonite,
The bottom end of collecting-tank 9 is provided with drain water circuit.
Use process: the water for having already passed through preliminary treatment is delivered in processing pond by inlet pipeline, the filtering in processing pond
Net is filtered the water entered in processing pond again, in order to avoid into other insolubility impurity are contained in the water in processing pond,
And blocking drip irrigation appliance, the water height in processing pond is higher than filter screen, and aquatile floating bed is swum in processing pond, due to water
Plant is to swim in the top of processing pond, to the absorption of Water phosphorus in processing pond with using having certain limitation
Property, so that making the N,P use efficiency in the water body of processing pond middle and lower part not high, agitating device is opened, is filled by stirring
It sets, the water for being located at processing pond middle and lower part is stirred, mixed and exchanged with the water for being located at processing pond top, to guarantee entire place
Reason pool inner water body nitrogen phosphorus can be uniformly removed by water plant, after a period of time, open elevator pump, water by lift line into
Enter in drip irrigation appliance, trickle irrigation operation is carried out to terrestrial plant by drip irrigation appliance, using the root system of terrestrial plant come in water
Nitrogen phosphorus is further removed, and water is concentrated in collecting-tank after flowing through filtering adsorption zone and separate mesh, by collecting-tank
The biological effect of biologic packing material nitrogen phosphorus remaining in water is subjected to last denitrogenation dephosphorizing, reach one to the water in collecting-tank
After quantitative, collecting-tank is discharged in the water after having handled qualification by drain water circuit, reusable to use water in flushing ground etc..
Embodiment two
On the basis of example 1, agitating device includes stirring motor 14, shaft 15, lower conical gear 16, upper circular cone
Gear 17, agitating shaft 18 and stirring blade 19, stirring motor 14 are arranged in 1 Basolateral of processing pond, the output of stirring motor 14
Axis is fixedly linked with shaft 15 that is running through 1 side of processing pond and being rotatablely connected with 1 other side of processing pond, is socketed in shaft 15
Lower conical gear 16, upper conical gear 17 are fixed on the bottom end of agitating shaft 18, in 18 outer sheath joint bearing 29 of agitating shaft, bearing 29
It is mutually fixed by fixed bracket 30 and the inner wall of processing pond 1, upper conical gear 17 and lower conical gear 16 are meshed, in agitating shaft
Stirring blade 19 is fixed on 18.
The quantity of lower conical gear 16 and upper conical gear 17 is 2-4.
The quantity of stirring blade 19 is 2-3.
Stirring motor is opened, the output shaft of stirring motor drives shaft to rotate, and then drives lower conical gear rotation,
Upper conical gear and lower conical gear are meshed, and lower conical gear drives the agitating shaft rotation on upper conical gear, stirring blade
The water of middle and lower part and the water of processing pond internal upper part swap in tape handling pond.
Embodiment three
On the basis of example 2, aquatile floating bed includes floating body 20, flowerpot 21, biomimetic type filler 22 and aquatic plant
Object opens up centre bore at the middle part of floating body 20, and flowerpot 21 is mounted in centre bore, and the basin bottom of flowerpot 21 is hollow mesh structure,
Biomimetic type filler 22 is filled in flowerpot 21, aquatile is planted in biomimetic type filler 22.
There is connecting hole 23 in the edge of floating body 20, is connected by rope through connecting hole 23 between adjacent floating body 20
It connects.
Biomimetic type filler 22 uses haydite.
Water plant passes through the fixed function of biomimetic type filler, and fixation has smoothly been reached in flowerpot, and due to biomimetic type
Between filler and flowerpot bottom end is the structure with gap, and the root system of water plant is protruded by these gaps
Into the water body of processing pond, the nitrogen phosphorus in water body is absorbed and utilized, tentatively to improve Water quality.
Example IV
On the basis of embodiment three, drip irrigation appliance include drip irrigation pipe 24, trickle irrigation mouth, interior fixed net 25, outer fixed net 26,
Buffering cotton 27 and vortex board 28, drip irrigation pipe 24 are connected with lift line 5, and trickle irrigation mouth is uniformly provided with the level of drip irrigation pipe 24
Duan Shang, vortex board 28 are arranged in the tube wall of drip irrigation pipe 24, and the side of vortex board 28 is trickle irrigation mouth, opposite on trickle irrigation mouth to set
It is equipped with interior fixed net 25 and outer fixed net 26, buffering cotton 27 is placed between interior fixed net 25 and outer fixed net 26.
Vortex board 28 is inclined on the inner wall of drip irrigation pipe 24, and vortex board 28 is the structure of concavo-convex, vortex
Trickle irrigation mouth is arranged in the convex surface side of plate 28, and the concave side of vortex board 28 is opposite with the entrance of drip irrigation pipe 24.
Angle between vortex board 28 and the inner wall of drip irrigation pipe 24 is 45-60 °, the distance between vortex board 28 and trickle irrigation mouth
For 5-10mm.
Water enters in drip irrigation pipe from the water intake end of drip irrigation pipe, when flowing through trickle irrigation mouth, due to the rear side setting in trickle irrigation mouth
There is vortex board, the blocking due to vortex board to water flow so that water flow forms vortex at trickle irrigation mouth, and then avoids being used for a long time
Scale or scale block trickle irrigation mouth, and the impact force that vortex can pass through the water of trickle irrigation mouth increases, if directly made it through
In trickle irrigation mouth trickle irrigation to the root system of crops, then the root system of crops can be caused to damage, therefore be fixed respectively up and down in trickle irrigation mouth
Inside and outside fixed net, the filling buffering cotton between inside and outside fixed net, buffering cotton has water certain absorption, and then buffers
The impact force of water flow reduces damage of the direct trickle irrigation to root system.
The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for
Relationship of the elements or features relative to another elements or features shown in explanatory diagram.It should be understood that in addition to figure
Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if in figure
Device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature "upper".
Therefore, exemplary term "lower" may include both upper and lower orientation.Device, which can be positioned in other ways, (to be rotated by 90 ° or position
In other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.
Moreover, the relational terms of such as " first " and " second " or the like are used merely to one with another with identical
The component of title distinguishes, without necessarily requiring or implying between these components there are any this actual relationship or
Sequentially.
The utility model is described in detail above, but the content is only the preferred embodiment of the utility model,
It should not be considered as limiting the scope of the present invention.Equivalent change made according to the scope of application of this utility model with
Improve etc., it should still belong within the patent covering scope of the utility model.
Claims (10)
1. denitrification dephosphorization apparatus, it is characterised in that: planted including water plant processing unit, lifting device, drip irrigation appliance and terrestrial
Object processing unit,
The water plant processing unit includes processing pond, inlet pipeline, filter screen, agitating device and aquatile floating bed, institute
State and offer water inlet in processing pond, the inlet pipeline is connected with the water inlet, the filter screen be fixed on it is described into
In the processing pond below the mouth of a river, the bottom end of the processing pond, the aquatile floating bed drift is arranged in the agitating device
It floats in the processing pond, and is located on the filter screen,
The lifting device includes elevator pump and lift line, and the elevator pump is arranged in the processing pond, the riser
Road is connected with the elevator pump, and the lift line is connected with the drip irrigation appliance,
The terrestrial plant processing unit includes terrestrial plant growing area, filtering adsorption zone, separate mesh and collecting-tank, the separation
Net is fixed on the top of the collecting-tank, and the top of the separate mesh is arranged the filtering adsorption zone, in the filtering adsorption zone
The terrestrial plant growing area, the terrestrial plant growing area is arranged on the top of the filtering adsorption zone in filled natural zeolite
Soil needed for interior filling plant grows, and terrestrial plant is planted, biochemical filler device is additionally provided in the collecting-tank, it is described
Biochemical filler device includes aerating pipelines, aeration branch pipe, air blower and biologic packing material net cage, and the aeration tube road is from top to bottom erected
It is straight to be arranged in the collecting-tank, the aeration branch pipe is uniformly arranged on the aeration tube road, the air blower passes through pipeline
It is connected with the inlet end on the aeration tube road, the biologic packing material net cage is fixed on the outside on the aeration tube road, described
The bottom end of collecting-tank is provided with drain water circuit.
2. denitrification dephosphorization apparatus according to claim 1, it is characterised in that: the agitating device includes stirring motor, turns
Axis, lower conical gear, upper conical gear, agitating shaft and stirring blade, the stirring motor are arranged outside the processing pond bottom end
Side, the output shaft of the stirring motor and turn that be running through the processing pond side and being rotatablely connected with the processing pond other side
Axis is fixedly linked, and the lower conical gear is socketed in the shaft, and the upper conical gear is fixed on the bottom of the agitating shaft
End, in the agitating shaft outer sheath joint bearing, the bearing passes through fixed bracket and the inner wall of the processing pond is mutually fixed, described
Upper conical gear and the lower conical gear are meshed, and are fixed with stirring blade on the agitating shaft.
3. denitrification dephosphorization apparatus according to claim 2, it is characterised in that: the lower conical gear and the upper circular cone tooth
The quantity of wheel is 2-4.
4. denitrification dephosphorization apparatus according to claim 2, it is characterised in that: the quantity of the stirring blade is 2-3.
5. denitrification dephosphorization apparatus according to claim 1, it is characterised in that: the aquatile floating bed includes floating body, flower
Basin, biomimetic type filler and water plant, open up centre bore in the middle part of the floating body, and the flowerpot is mounted on the centre bore
Interior, the basin bottom of the flowerpot is hollow mesh structure, and the biomimetic type filler, the aquatile are filled in the flowerpot
It is planted in the biomimetic type filler.
6. denitrification dephosphorization apparatus according to claim 5, it is characterised in that: have connection in the edge of the floating body
Hole is connected between the adjacent floating body through the connecting hole by rope.
7. denitrification dephosphorization apparatus according to claim 5, it is characterised in that: the biomimetic type filler uses haydite.
8. denitrification dephosphorization apparatus according to claim 1, it is characterised in that: the drip irrigation appliance includes drip irrigation pipe, trickle irrigation
Mouth, interior fixed net, outer fixed net, buffering cotton and vortex board, the drip irrigation pipe are connected with the lift line, the trickle irrigation mouth
It is uniformly provided on the horizontal segment of the drip irrigation pipe, the vortex board is arranged in the tube wall of the drip irrigation pipe, and the vortex
The side of plate is the trickle irrigation mouth, and the interior fixed net and the outer fixed net are relatively set on the trickle irrigation mouth, described
Buffering cotton is placed between the interior fixed net and the outer fixed net.
9. denitrification dephosphorization apparatus according to claim 8, it is characterised in that: the vortex board is inclined at the trickle irrigation
On the inner wall of pipe, the vortex board is the structure of concavo-convex, and the trickle irrigation mouth is arranged in the convex surface side of the vortex board,
The concave side of the vortex board is opposite with the entrance of the drip irrigation pipe.
10. denitrification dephosphorization apparatus according to claim 9, it is characterised in that: the vortex board is interior with the drip irrigation pipe
Angle between wall is 45-60 °, and the distance between the vortex board and the trickle irrigation mouth are 5-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822193392.4U CN209456161U (en) | 2018-12-25 | 2018-12-25 | Denitrification dephosphorization apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822193392.4U CN209456161U (en) | 2018-12-25 | 2018-12-25 | Denitrification dephosphorization apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209456161U true CN209456161U (en) | 2019-10-01 |
Family
ID=68042174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822193392.4U Expired - Fee Related CN209456161U (en) | 2018-12-25 | 2018-12-25 | Denitrification dephosphorization apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209456161U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112499783A (en) * | 2020-11-26 | 2021-03-16 | 苏州金螳螂园林绿化景观有限公司 | Oxygenation filtering method and system for river pollution treatment |
| CN113371952A (en) * | 2021-07-27 | 2021-09-10 | 中车环境科技有限公司 | Denitrification and dephosphorization device for water treatment |
-
2018
- 2018-12-25 CN CN201822193392.4U patent/CN209456161U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112499783A (en) * | 2020-11-26 | 2021-03-16 | 苏州金螳螂园林绿化景观有限公司 | Oxygenation filtering method and system for river pollution treatment |
| CN112499783B (en) * | 2020-11-26 | 2023-12-12 | 苏州金螳螂园林绿化景观有限公司 | Oxygenation filtering method and system for river pollution treatment |
| CN113371952A (en) * | 2021-07-27 | 2021-09-10 | 中车环境科技有限公司 | Denitrification and dephosphorization device for water treatment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191001 Termination date: 20211225 |