CN209226792U - Sewage-treatment plant - Google Patents
Sewage-treatment plant Download PDFInfo
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- CN209226792U CN209226792U CN201822022057.8U CN201822022057U CN209226792U CN 209226792 U CN209226792 U CN 209226792U CN 201822022057 U CN201822022057 U CN 201822022057U CN 209226792 U CN209226792 U CN 209226792U
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- aeration
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- reaction tank
- membrane module
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Abstract
The utility model provides a kind of sewage-treatment plant, belongs to field of environment protection equipment.The sewage-treatment plant includes conditioning tank, reaction tank and aeration component.Wherein, the water inlet end of conditioning tank is provided with the filter layer for filter sewage suspended matter.Biologic packing material layer and MBR membrane module are provided in reaction tank, biologic packing material layer is used for mud-water separation for carrying out biological denitrificaion, MBR membrane module, and biologic packing material layer and MBR are set gradually along the flow direction of sewage.Sewage is drained into reaction tank in conditioning tank.When sewage passes through MBR membrane module, MBR membrane module can retain sludge, and solid-liquid separation effect is preferable, can be improved water outlet quality.In this process, while the reflux of nitrification liquid is not needed, to simplify process flow.
Description
Technical field
The utility model relates to field of environment protection equipment, in particular to a kind of sewage-treatment plant.
Background technique
A2O method is a kind of common sewage treatment process, which can be used for secondary sewage processing or three-level
Sewage treatment, the sewage treatment process flow back, and process flow is more complex, are discharged poor quality.
Utility model content
The utility model provides a kind of sewage-treatment plant, it is intended to which simplification of flowsheet improves water outlet quality.
The utility model is realized in this way:
A kind of sewage-treatment plant, including conditioning tank, reaction tank and aeration component.
Wherein, the water inlet end of the conditioning tank is provided with the filter layer for filter sewage suspended matter.
The reaction tank is configured to be connected to and can accommodate with the conditioning tank sewage that the conditioning tank flows into, described
Biologic packing material layer and MBR membrane module are provided in reaction tank, the biologic packing material layer is used to carry out biological denitrificaion to sewage, described
MBR membrane module is used for mud-water separation, the biologic packing material layer and the MBR membrane module be configured to along the flow direction of sewage according to
Secondary setting.
The aeration component into the reaction tank for being aerated.
Further, in an embodiment of the present invention, the aeration component includes Aeration fan and aeration tube,
The aeration tube is set in the reaction tank, and the Aeration fan is connected to the aeration tube, and the Aeration fan is used for
Gas is blasted into the aeration tube, the aeration tube into the reaction tank for being aerated.
Further, in an embodiment of the present invention, the aeration tube includes being aerated general pipeline and aeration branch pipe,
The Aeration fan is connected to the aeration general pipeline, and the Aeration fan is used to blast gas into the aeration general pipeline, institute
It states aeration branch pipe to be connected to the aeration general pipeline, the aeration branch pipe is fixed on the MBR membrane module, and the aeration branch pipe is used for
It is aerated to the bottom of the MBR membrane module.
Further, in an embodiment of the present invention, the aeration branch pipe is uniformly provided with solarization air cap, described
The opening direction of solarization air cap is towards the bottom of the MBR membrane module.
Further, in an embodiment of the present invention, the aperture of the solarization air cap is 2~5mm, adjacent institute
Stating the spacing between solarization air cap is 20~30mm.
Further, in an embodiment of the present invention, the aeration component further includes flowmeter and valve, institute
It states flowmeter and is installed on the aeration general pipeline for measuring gas flow, the valve, which is installed on, is aerated general pipeline close to the aeration
One end of blower is for controlling gas flow.
Further, in an embodiment of the present invention, the MBR membrane module includes MBR film, film frame,
One cross bar and second crossbar, the both ends of the MBR film are individually fixed in the first crossbar and the second crossbar, and described
One cross bar and the second crossbar are fixed on the film frame.
It further, further include the first suction unit in an embodiment of the present invention, the first suction dress
The water inlet end set is connected to the conditioning tank, and the water outlet of first suction unit is connected to so that described with the reaction tank
Sewage drains into the reaction tank in conditioning tank.
It further, further include the second suction unit in an embodiment of the present invention, the second suction dress
The water inlet end set is connected to the reaction tank, and second suction unit is for by treated in the reaction tank, sewage to be arranged
Out.
Further, in an embodiment of the present invention, the filter layer includes film grid, and the film grid inclines
Tiltedly setting.
The beneficial effects of the utility model are: the sewage-treatment plant that the utility model obtains by above-mentioned design, including
Conditioning tank, reaction tank and aeration component.When in use, sewage is first intercepted suspended matter by loaded filter when entering conditioning tank,
Guarantee the normal operation of MBR membrane module.Sewage is drained in reaction tank and is removed by conditioning tank after the processing of conditioning tank homogeneous average
Remove BOD.By adjusting temperature, PH and dissolved oxygen amount concentration, short-cut nitrification and denitrification biology occurs in the biologic packing material layer of reaction tank
Have the function that denitrogenation.Dirt load is controlled simultaneously, Denitrifying Phosphate Accumulating Organisms is promoted to generate poly- phosphorus effect and remove the phosphorus in decontaminated water.
When sewage passes through MBR membrane module, MBR membrane module can retain sludge, and solid-liquid separation effect is preferable, can be improved water outlet product
Matter.In this process, the reflux of nitrification liquid is not needed, to simplify process flow.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not
It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is A2O process flow chart in the prior art provided by the embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram of sewage-treatment plant provided by the embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of MBR membrane module provided by the embodiment of the utility model；
Fig. 4 is the structural schematic diagram of a kind of first crossbar and second crossbar provided by the embodiment of the utility model；
Fig. 5 is a kind of structural schematic diagram of first crossbar provided by the embodiment of the utility model；
Fig. 6 is a kind of structural schematic diagram of aeration tube provided by the embodiment of the utility model.
Icon: 1- anaerobic pond；2- anoxic pond；3- aerobic tank；4- sedimentation basin；10- sewage-treatment plant；100- conditioning tank；
110- filter layer；300- reaction tank；310- biologic packing material layer；330-MBR membrane module；331-MBR film；333- film frame；335-
First crossbar；3351- shell；3353- fixed ring；337- second crossbar；500- is aerated component；510- Aeration fan；530- exposes
Tracheae；531- is aerated general pipeline；533- aeration branch pipe；5331- solarization air cap；The first suction unit of 700-；The second suction unit of 900-.
Specific embodiment
It is practical below in conjunction with this to keep the purposes, technical schemes and advantages of the utility model embodiment clearer
The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment, shows
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.It is practical based on this
Embodiment in novel, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment is fallen within the protection scope of the utility model.
Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the utility model of protection is sought, but is merely representative of the selected embodiment of the utility model.Based on the utility model
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Mode is fallen within the protection scope of the utility model.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be understood that the instructions such as term "vertical", "horizontal", "inner", "outside"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification
Description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, constructed and grasped with specific orientation
Make, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
It is connected directly, the mutual of connection inside two elements or two elements can also be can be indirectly connected through an intermediary
Interactively；It can be electric connection, be also possible to be electrically connected.For the ordinary skill in the art, Ke Yigen
The concrete meaning of above-mentioned term in the present invention is understood according to concrete condition.
The prior art of the application is introduced first, referring to Fig. 1, A2O method sewage treatment process mainly need through
Go through anaerobic pond 1, anoxic pond 2, aerobic tank 3 and sedimentation basin 4.In anaerobic pond 1, it is discharged by raw sewage and sedimentation basin 4 phosphorous
Returned sludge enters anaerobic pond 1, by partial organic substances ammonification and discharges phosphorus, then by the progress denitrogenation of anoxic pond 2 and in aerobic tank 3
Phosphorus is inside nitrified and is absorbed, the part mixed liquor after reaction is back to anoxic pond 2.Sedimentation basin 4 is mainly by quiet for a long time
It sets and achievees the effect that mud-water separation, sludge a part is back to anaerobic pond 1, and supernatant is as processing water discharge.
The sewage treatment process needs to carry out multi-reflow, causes process flow complicated, outlet effect is poor.
For this purpose, inventors herein proposing a kind of sewage-treatment plant 10, it is intended to which simplification of flowsheet improves effluent characteristics.
Referring to Fig. 2, Fig. 2 shows the utility model embodiments to provide a kind of structural representation of sewage-treatment plant 10
Figure.A kind of sewage-treatment plant 10 provided in this embodiment includes conditioning tank 100, reaction tank 300 and aeration component 500.
Wherein, conditioning tank 100 is used to adjust the water and water quality of sewage.The conditioning tank 100 mentioned in the present embodiment is one
Kind homogeneous average conditioning tank 100, main purpose are the sewage homogeneous averages for guaranteeing to enter reaction tank 300.In order to enable water outlet
Water quality is uniform to avoid wherein pollutant precipitating.When specifically used, water pump circulation stirring, air stirring, jet stream can be used
The modes such as stirring, mechanical stirring make water quality uniform.For example, using agitation cycle when selection is using water pump circulation stirring mode
Water pump, agitation cycle water pump can also be equipped with electric cabinet, controller, workbench etc. as needed, and can be used existing
Equipment, details are not described herein.In addition, conditioning tank 100 can use Reinforced Concrete Structure, the residence time is designed by 10~20h, is protected with this
Demonstrate,prove the water inlet homogeneous average of reaction tank 300.
Suspended matter enters reaction tank 300 in order to prevent, influences going on smoothly for subsequent sewage treatment.Conditioning tank 100 into
Water end (W.E.) is provided with the filter layer 110 for filter sewage suspended matter.Wherein, filter layer 110 is for intercepting suspended matter.Optionally,
Filter layer 110 can be film grid, and film grid can effectively intercept suspended matter as a kind of fine filtration device, guarantee dirty
Water process is normally carried out.
In specific setting, in order to improve the contact area of film grid and waste water, film grid is obliquely installed.Further
Ground, the angle that plane and horizontal plane where film grid are formed is at 30~60 °.Plane in specific setting, where film grid
The angle formed with horizontal plane can be 55 °.
It is appreciated that in other embodiments, film grid is also substituted for sieve, sand, filter cloth, microporous pipe etc. and carries out suspended matter
It intercepts.
Sewage enters reaction tank 300 after the processing of 100 homogeneous average of conditioning tank.Wherein, conditioning tank 100 and reaction tank 300
Between the first suction unit 700 can be set, i.e. the water inlet end of the first suction unit 700 is connected to conditioning tank 100, first suction
The water outlet of device 700 is connected to reaction tank 300, is drained into the sewage in conditioning tank 100 instead using the first suction unit 700
It answers in pond 300.Optionally, the first suction unit 700 is self priming pump, and self priming pump has the advantages that inflow and outflow is stable.
Realize in conditioning tank 100 sewage to reaction tank in addition, conditioning tank 100 and reaction tank 300 also can use head difference
300.In specific setting, the sewage of higher level is drained in the reaction tank 300 compared with low water level by conditioning tank 100.
Biologic packing material layer 310 and MBR membrane module 330 are provided in reaction tank 300.Wherein, biologic packing material layer 310 is for sending out
Raw short-cut nitrification and denitrification carries out biological denitrificaion, and MBR membrane module 330 is used for mud-water separation.Biologic packing material layer 310 and MBR film group
Part 330 is set gradually along the flow direction of sewage, i.e., sewage first passes through after biologic packing material layer 310 reacts and flows into MBR module.
It should be noted that biologic packing material is a kind of existing sewage treating material, wherein 310 biologic packing material of biologic packing material layer
For hollow structure, its filler growth inside anaerobic bacteria when in use, generating denitrification can be with denitrogenation, and external growth is aerobic
Bacterium removes organic matter, exists simultaneously nitrification and denitrification process in entire treatment process.Furthermore it is possible to negative by control dirt
Lotus promotes Denitrifying Phosphate Accumulating Organisms to generate poly- phosphorus effect and remove the phosphorus in decontaminated water.In the process, it does not need to traditional A2O work
Skill is largely aerated like that, while not needing the reflux of nitrification liquid, be can be realized synchronous denitrification dephosphorizing, is simplified process flow.
In the present embodiment, saprobia packing layer 310 is made of biologic packing material, dissolved oxygen control 0.15~
0.35mg/L。
The concept of MBR film 331 is briefly described first:
MBR film 331 refers to membrane bioreactor (MembraneBioreactor), is the height by biodegradation and film
Imitate a kind of new and effective wastewater treatment and reuse technique that isolation technics is combined and formed.It will be reacted using membrane separation device
Activated sludge and larger molecular organics matter effectively catching in pond 300.There is good effect of separating solid from liquid compared with traditional handicraft, it is dirty
The advantages that mud low output and good effluent quality.
In a kind of specific embodiment, MBR membrane module 330 includes MBR film 331, film frame 333, first crossbar 335
And second crossbar 337, please refer to Fig. 3-4.
Wherein, the both ends of MBR film 331 are individually fixed in first crossbar 335 and second crossbar 337, first crossbar 335 and
Two cross bars 337 are fixed on film frame 333.Referring to Fig. 5, first crossbar 335 includes 2 3351 Hes of shell in specific setting
Fixed ring 3353.Wherein, two shells 3351 have opposite contact surface, when 2 shells 3351 are fixed by fixed ring 3353
First crossbar 335 is formed, at this point, there is two shells 3351 opposite contact surface to clamp to MBR film 331.Needing
Fixed MBR film 331, fixed ring 3353 is removed, MBR film 331 is placed between the contact surface of 2 shells 3351, then by solid
Determine ring 3353 MBR film 331 is fixed, i.e., MBR film 331 is clamped by 2 shells 3351.It is appreciated that second crossbar 337 can also be with
It is fixed using the other end of this structure to MBR film 331.
In specific setting, film frame 333 is provided with lifting lug, facilitates lift by crane to film frame 333 when in use, carries out MBR
Film 331 is replaced or is safeguarded.
Aeration component 500 into reaction tank 300 for being aerated.Aeration refers to be forced to shift into liquid by the oxygen in air
Process, the purpose is to obtain enough dissolved oxygens.In addition, aeration also prevents suspended substance in pond from sinking, reinforce organic in pond
The purpose that object is contacted with microorganism and dissolved oxygen.To guarantee that microorganism is under conditions of having sufficient dissolved oxygen in pond, to sewage
The oxygenolysis of middle organic matter.
In a kind of specific embodiment, aeration component 500 includes Aeration fan 510 and aeration tube 530, please refers to figure
6。
Aeration tube 530 is set in reaction tank 300, and Aeration fan 510 is connected to aeration tube 530, and Aeration fan 510 is used
In blasting gas into aeration tube 530.Optionally, Aeration fan 510 can choose centrifugal fan, Roots blower, revolution
Formula blower, liquid-ring type blower, air compressor or blowing and drawing type air pump.
When in use, air or the pressure of other oxygen-containing gas are added in sewage by Aeration fan 510, to reaction tank
Aeration in 300, i.e., be aerated to biologic packing material layer 310 and 330 region of MBR membrane module, guarantees that microorganism exists in reaction tank 300
Have and oxygenolysis is carried out to dirty Organic substance in water under sufficient dissolved oxygen conditions, realize inorganization or aerifies.
In specific setting, aeration tube 530 includes being aerated general pipeline 531 and aeration branch pipe 533, Aeration fan 510 and aeration
General pipeline 531 is connected to, and Aeration fan 510 is used to blast gas into aeration general pipeline 531.Aeration branch pipe 533 and aeration general pipeline 531
Connection, aeration branch pipe 533 are fixed on film frame 333, and aeration branch pipe 533 is used to be aerated to the bottom of MBR membrane module 330, also
It is to be aerated to the bottom of MBR film 331.
When in use, the inlet end for being aerated general pipeline 531 is connected to Aeration fan 510 to be entered for gas, is aerated general pipeline 531
The other end be connected to aeration branch pipe 533, be aerated from aeration branch pipe 533 to the bottom of MBR membrane module 330, and gradually by gas
It diffuses in reaction tank 300.Since aeration branch pipe 533 is aerated to the bottom of MBR membrane module 330, gas is from close to MBR membrane module
330 bottom is nearby discharged in sewage, and the discharge of gas will lead to the film wire shake of MBR film 331, it is possible to reduce the dirt of film wire
Adhesion amount improves the service life of MBR film 331.
Aeration branch pipe 533 offers solarization air cap 5331, is vented from solarization air cap 5331 into sewage, and by solarization air cap 5331
The gas of discharge drives the film wire shake of MBR film 331.Specifically, solarization air cap 5331 is uniform along the length direction of aeration branch pipe 533
Setting.Wherein, the opening direction of solarization air cap 5331 is towards the bottom of MBR film 331.In specific setting, the hole of solarization air cap 5331
Diameter can be in the spacing between 2~5mm, adjacent solarization air cap 5331 between 10~30mm.In specific setting, solarization air cap
5331 aperture is 4mm, and the aperture of solarization air cap 5331 is 25mm.The purpose being arranged in this way is, the aperture of solarization air cap 5331 compared with
It is small to bring higher gas discharge flow velocity, facilitate the film wire jitter amplitude and frequency of MBR film 331, reduces dirt attachment
Amount.Spacing between solarization air cap 5331 is being arranged in 10~30mm, enables to 331 bottom jitter of MBR film uniform, avoids office
The film wire of portion's MBR film 331 is not shaken.
In order to control gaseous fluid, in the present embodiment, aeration component 500 further includes flowmeter and valve, flowmeter peace
It is installed on aeration general pipeline 531 for measuring gas flow, valve loaded on aeration general pipeline 531 and is used close to one end of Aeration fan 510
In control gas flow.By the cooperation of valve and flowmeter, the flow of gas can control.
In addition, reaction tank 300 be provided with for sewage discharge the second suction unit 900, the second suction unit 900 into
Water end (W.E.) is connected to reaction tank 300.At this point, being the clear water after sewage treatment by the sewage that the second suction unit 900 is discharged.In order to
Guarantee the stability of 900 inflow and outflow of the second suction unit, the second suction unit 900 can use self priming pump.
It is appreciated that the discharge of clear water after sewage treatment can also use other modes in reaction tank 300, such as
The side wall of reaction tank 300 opens up aqueduct, and water valve is arranged in aqueduct.
The working principle of the sewage-treatment plant 10 of the present embodiment: sewage will be hanged when entering conditioning tank 100 by loaded filter
Floating object intercepts, and guarantees the normal operation of MBR membrane module 330, prolongs its service life and reduce failure rate.Then through homogeneous average
Sewage after processing in conditioning tank 100 is drained in reaction tank 300, removes BOD under the action of aerobic bacteria.By adjusting temperature
Degree, PH and dissolved oxygen amount concentration occur short-cut nitrification and denitrification biology in the biologic packing material layer 310 of reaction tank 300 and reach denitrogenation
Effect.Dirt load is controlled simultaneously, Denitrifying Phosphate Accumulating Organisms is promoted to generate poly- phosphorus effect and remove the phosphorus in decontaminated water.Pass through in sewage
When MBR membrane module 330, MBR membrane module 330 can retain sludge, and solid-liquid separation effect is preferable, can be improved water outlet quality.
In this process, it does not need largely to be aerated as tradition A2O technique, while not needing the reflux of nitrification liquid, to simplify technique
Process.And the simplification of process flow shortens the process time to a certain extent, facilitates the energy for reducing sewage treatment operation
Consumption.
Above description is merely a prefered embodiment of the utility model, is not intended to limit the utility model, for
For those skilled in the art, various modifications and changes may be made to the present invention.All spirit and original in the utility model
Within then, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of sewage-treatment plant, which is characterized in that including
Conditioning tank, the water inlet end of the conditioning tank are provided with the filter layer for filter sewage suspended matter；
Reaction tank, the reaction tank are configured to be connected to and can accommodate with the conditioning tank sewage that the conditioning tank flows into,
Biologic packing material layer and MBR membrane module are provided in the reaction tank, the biologic packing material layer is used to carry out biological denitrificaion to sewage,
The MBR membrane module is used for mud-water separation, and the biologic packing material layer and the MBR membrane module are configured to along the flowing side of sewage
To setting gradually；And
It is aerated component, the aeration component into the reaction tank for being aerated.
2. sewage-treatment plant according to claim 1, which is characterized in that the aeration component includes Aeration fan and exposure
Tracheae, the aeration tube are set in the reaction tank, and the Aeration fan is connected to the aeration tube, and the Aeration fan
For blasting gas into the aeration tube, the aeration tube into the reaction tank for being aerated.
3. sewage-treatment plant according to claim 2, which is characterized in that the aeration tube includes aeration general pipeline and aeration
Branch pipe, the Aeration fan are connected to the aeration general pipeline, and the Aeration fan is for blasting gas into the aeration general pipeline
Body, the aeration branch pipe are connected to the aeration general pipeline, and the aeration branch pipe is fixed on the MBR membrane module, the aeration branch
Pipe to the bottom of the MBR membrane module for being aerated.
4. sewage-treatment plant according to claim 3, which is characterized in that the aeration branch pipe is uniformly provided with aeration
Hole, the opening direction of the solarization air cap is towards the bottom of the MBR membrane module.
5. sewage-treatment plant according to claim 4, which is characterized in that the aperture of the solarization air cap is 2~5mm, phase
Spacing between the adjacent solarization air cap is 20~30mm.
6. according to the described in any item sewage-treatment plants of claim 3-5, which is characterized in that the aeration component further includes stream
Meter and valve, the flowmeter are installed on the aeration general pipeline for measuring gas flow, and it is total that the valve is installed on aeration
It manages close to one end of the Aeration fan for controlling gas flow.
7. sewage-treatment plant according to claim 1, which is characterized in that the MBR membrane module includes MBR film, film frame
The both ends of frame, first crossbar and second crossbar, the MBR film are individually fixed in the first crossbar and the second crossbar,
The first crossbar and the second crossbar are fixed on the film frame.
8. sewage-treatment plant according to claim 1, which is characterized in that it further include the first suction unit, described first
The water inlet end of suction unit is connected to the conditioning tank, the water outlet of first suction unit be connected to the reaction tank so that
Sewage in the conditioning tank is obtained to drain into the reaction tank.
9. sewage-treatment plant according to claim 1, which is characterized in that it further include the second suction unit, described second
The water inlet end of suction unit is connected to the reaction tank, and second suction unit is used for that treated in the reaction tank is dirty
Water discharge.
10. sewage-treatment plant according to claim 1, which is characterized in that the filter layer includes film grid, the film
Grid is obliquely installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822022057.8U CN209226792U (en) | 2018-12-03 | 2018-12-03 | Sewage-treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822022057.8U CN209226792U (en) | 2018-12-03 | 2018-12-03 | Sewage-treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209226792U true CN209226792U (en) | 2019-08-09 |
Family
ID=67506052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822022057.8U Active CN209226792U (en) | 2018-12-03 | 2018-12-03 | Sewage-treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209226792U (en) |
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2018
- 2018-12-03 CN CN201822022057.8U patent/CN209226792U/en active Active
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