CN205740655U - Sewage disposal system - Google Patents
Sewage disposal system Download PDFInfo
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- CN205740655U CN205740655U CN201620406307.6U CN201620406307U CN205740655U CN 205740655 U CN205740655 U CN 205740655U CN 201620406307 U CN201620406307 U CN 201620406307U CN 205740655 U CN205740655 U CN 205740655U
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- Prior art keywords
- sewage
- sewage disposal
- disposal system
- anaerobic tower
- temperature regulation
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Abstract
This utility model relates to technical field of sewage, especially relates to a kind of sewage disposal system.Described sewage disposal system includes pretreatment unit, temperature regulation tank, anaerobic tower and membrane biological reaction pond, described pretreatment unit, described temperature regulation tank, described anaerobic tower, described membrane biological reaction pond are sequentially communicated, and being connected between described pretreatment unit with described anaerobic tower has heat exchanger.The sewage disposal system that this utility model provides is that sewage disposal provides a complete set of anaerobism sewage-treatment plant, fill up the blank of the anaerobism sewage disposal system of recycling, expand sewage disposal system range of application in a lot of industries, meet the sewage disposal requirement that people are growing, it is possible to effectively facilitate environment and economic coordinated development.
Description
Technical field
This utility model relates to technical field of sewage, especially relates to a kind of sewage disposal system.
Background technology
The sewage disposal of the industries such as current petroleum drilling and mining, refining and chemical industry, electric power, pharmacy, medicine is increasingly subject to people
Concern, there is certain technical bottleneck in sewage disposal, and the requirement that sewage drainage standard is improved by masses is stronger,
The technology of sewage disposal is just had higher requirement by this.
The most domestic patented technology for sewage disposal employing anaeration in normal temperature is more, is the most all specific to anaerobism anti-
Answer the improvement of device, and the anaerobism sewage disposal system carrying out recycling is still in blank, cause sewage disposal system very
It is restricted in the application of many industries.
Therefore, need a kind of sewage disposal system that can carry out recycling of development badly, growing to meet people
Sewage disposal requirement, promote environment and economic coordinated development.
Utility model content
The purpose of this utility model is to provide a kind of sewage disposal system, to solve resource present in prior art
The anaerobism sewage disposal system utilized is in blank, causes sewage disposal system to be restricted skill in the application of the most a lot of industries
Art problem.
The sewage disposal system that this utility model provides, biological including pretreatment unit, temperature regulation tank, anaerobic tower and film
Reaction tank, described pretreatment unit, described temperature regulation tank, described anaerobic tower, described membrane biological reaction pond are sequentially communicated, described
It is connected between pretreatment unit with described anaerobic tower and has heat exchanger.
Further, described heat exchanger is also connected with described temperature regulation tank.
Further, described sewage disposal system also includes heater, for adding to the sewage in described temperature regulation tank
Heat.
Further, described sewage disposal system also includes biogas storage tank, described biogas storage tank and described anaerobic tower
It is connected.
Further, described sewage disposal system also includes that burner, described burner are connected with described biogas storage tank
Logical, described burner is added to the sewage in described temperature regulation tank for the biogas provided by the described biogas storage tank that burns
Heat.
Further, described temperature regulation tank is connected with described anaerobic tower by sewage pump.
Further, it is configured with submersible agitator in described anaerobic tower.
Further, described sewage disposal system also includes back purge system, is used for cleaning described membrane biological reaction pond.
Further, described membrane biological reaction pond is configured with aerator.
Further, described anaerobic tower includes many sub-anaerobic towers, and the plurality of sub-anaerobic tower is sequentially communicated.
The sewage disposal system that this utility model provides, biological by pretreatment unit, temperature regulation tank, anaerobic tower and film
Reaction tank is sequentially communicated, and enables sewage laggard by the pretreatment unit pretreatment such as slag, aeration desilting, air supporting grease removal that carry out lying prone
Enter temperature regulation tank, make the temperature of sewage be maintained between 30～38 DEG C, so that sewage can keep relatively in temperature regulation tank
High anaerobic nitrification activity enters anaerobic tower and carries out microorganism nitration reaction, and sewage is during anaerobic tower carries out anaerobic nitrification
Fully being degraded by organic pollution while producing biogas, the organic pollution remaining difficult degradation in sewage is biological by film
Reaction tank, it is achieved absorption further, isolation and biodegradation, reaches the effect of solid-liquid separation, makes to process from membrane biological reaction pond
After water can reach discharge standard；This utility model has heat exchanger also by being connected between pretreatment unit with anaerobic tower,
The sewage discharged from anaerobic tower is made to carry out heat exchange with the sewage pretreatment unit, so that the residue of the sewage of anaerobic tower discharge
Heat can make full use of, and reaches to save the energy, promotes the purpose of social sustainable development；At the sewage that this utility model provides
Reason system is that sewage disposal provides a complete set of anaerobism sewage-treatment plant, has filled up recycling anaerobism sewage disposal system
Blank, expands the sewage disposal system range of application in a lot of industries, meets the sewage disposal requirement that people are growing,
Environment and economic coordinated development can be effectively facilitated.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, below by right
In detailed description of the invention or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be embodiments more of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the sewage disposal system that Fig. 1 provides for this utility model embodiment.
Reference:
101-pretreatment unit；102-temperature regulation tank；103-anaerobic tower；
104-membrane biological reaction pond；105-heat exchanger；106-biogas storage tank；
107-burner；108-sewage pump；109-back purge system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, it is clear that described
Embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, this
The every other embodiment that field those of ordinary skill is obtained under not making creative work premise, broadly falls into this practicality
Novel protected scope.
In description of the present utility model, " " center ", " on ", D score, "left", "right", " perpendicular it should be noted that term
Directly ", " level ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, be only
Must have specific for the ease of describing this utility model and simplification description rather than instruction or the device of hint indication or element
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Language concrete meaning in this utility model.
Embodiment 1
The structural representation of the sewage disposal system that Fig. 1 provides for this utility model embodiment；As it is shown in figure 1, this practicality
The sewage disposal system of novel offer, including pretreatment unit 101, temperature regulation tank 102, anaerobic tower 103 and membrane biological reaction
Pond 104, pretreatment unit 101, temperature regulation tank 102, anaerobic tower 103, membrane biological reaction pond 104 be sequentially communicated, and pretreatment fills
Put to be connected between 101 with anaerobic tower 103 and have heat exchanger 105.
Sewage disposal is exactly to make sewage through processing the process reaching discharge standard, and current Anaerobic Microbiological Treatment Technology is dirty
Water treatment field uses modal technology, is widely used in various municipal sewage and Industrial Waste Water Treatments.At Anaerobe
Reason refers to by the effect of anaerobe under conditions of free-dioxygen, by the Organic substance decomposition and inversion of complexity various in waste water
Become the process of the materials such as methane and carbon dioxide.Domestic existing sewage disposal system is the improvement for anaerobic device mostly,
The anaerobism sewage disposal system carrying out recycling is still in blank.The sewage disposal system that this utility model provides, is profit
By microorganism middle temperature fast reaction principle, the sewage disposal system of a whole set of recycling developed.
The sewage disposal system that this utility model provides, by pretreatment unit 101, temperature regulation tank 102, anaerobic tower
103 and membrane biological reaction pond 104 be sequentially communicated, enable sewage to carry out lie prone slag, aeration desilting, gas by pretreatment unit 101
Enter temperature regulation tank 102 after the pretreatment such as floating grease removal, make the temperature of sewage be maintained at 30～38 DEG C in temperature regulation tank 102
Between, so that sewage can keep higher anaerobic nitrification activity to enter anaerobic tower 103 carries out microorganism nitration reaction, sewage exists
Organic pollution is fully degraded while producing biogas during carrying out anaerobic nitrification by anaerobic tower 103, remaining in sewage
Be difficult to the organic contamination compound thing degraded and enter membrane biological reaction pond 104 with sewage, make Organic substance be adsorbed further, every
From and biodegradation, enable membrane biological reaction pond process after water reach discharge standard；This utility model is also by pre-place
It is connected between reason device 101 and anaerobic tower 103 and has heat exchanger 105, make sewage and the pretreatment unit discharged from anaerobic tower 103
Sewage in 101 carries out heat exchange, enables the after-heat in the sewage that anaerobic tower 103 discharges to make full use of, and reaches to save
The energy, promotes the purpose of social sustainable development；The sewage disposal system that this utility model provides is that sewage disposal provides entirely
Set anaerobism sewage-treatment plant, has filled up the blank of recycling anaerobism sewage disposal system, has expanded sewage disposal system
Range of application in a lot of industries, meets the sewage disposal requirement that people are growing, it is possible to effectively facilitate environment and warp
The coordinated development of Ji.
As it is shown in figure 1, heat exchanger 105 is also connected with temperature regulation tank 102.
In this utility model, carry out, owing to reconciling the sewage in tank 102 to temperature, the energy consumption that heating needs are certain, in order to
Maintaining the energy balance, save Methane Resources, what anaerobic tower 103 was discharged by this utility model has the sewage of residue heat energy and pre-place
Sewage in reason device carries out heat exchange, so that pretreating sewage temperature improves 5～10 DEG C, saves energy consumption 1/3rd.At this
In utility model, heat exchanger 105 includes heat exchange casing and heat exchange tube body, and heat exchange tube body is arranged at the inside of heat exchange casing, heat exchange
The input of body is connected with the outfan of anaerobic tower, the outfan of heat exchange tube body and the input in membrane biological reaction pond 104
It is connected；The input of heat exchange casing is connected with the outfan of pretreatment unit, and the outfan of heat exchange casing regulates with temperature
The input of tank 102 is connected.During carrying out heat exchange, what anaerobic tower 103 was discharged has the sewage entrance of residue heat energy
The inside of heat exchange tube body, the sewage in pretreatment unit 101 enters the inside of heat exchange casing, and the inside of heat exchange tube body has residue
The sewage of heat energy carries out heat exchange with the sewage of heat exchange box house, makes the sewage temperature of heat exchange box house raise, so that logical
Cross heat exchange casing and enter the temperature rising of temperature regulation tank 102, thus reach to make pretreating sewage temperature raise, save energy consumption
Purpose.Have residue heat energy sewage by heat exchange tube body through supercooling laggard enter membrane biological reaction pond 104, inhale further
Attached, biodegradation and realize solid-liquid separation, discharges after reaching sewage drainage standard.
It should be noted that heat exchanger 105 both can be shell-and-tube heat exchanger or plate type heat exchanger, it can be again container
Internal coil-tube type and spiral heat exchanger, it is also possible to select other type of heat exchanger as required.
The sewage disposal system that this utility model provides also includes heater, for the sewage in temperature regulation tank 102
Heating.
In the sewage disposal system initial start stage that this utility model provides, in order to the sewage making temperature regulate in tank 102 reaches
To 30～38 DEG C, it is beneficial to follow-up carry out bio anaerobic nitration reaction, needs to heat to the sewage of temperature regulation tank 102,
This utility model is heated to temperature regulation tank 102 by heater.Heater can be electric heater, it is also possible to for other
The heater of type, if use electric heater, needs to arrange earth leakage protective.
As it is shown in figure 1, the sewage disposal system that this utility model provides also includes biogas storage tank 106, biogas storage tank
106 are connected with anaerobic tower 103.
Sewage is carrying out anaerobic bio-treated during in anaerobic tower 103, and the Organic substance in sewage is through a large amount of microorganisms
Common effect, be eventually converted into biogas and organic pollution.The sewage disposal system that this utility model provides also includes natural pond
Gas holding vessel 106, biogas storage tank 106 is connected with anaerobic tower 103, and biogas storage tank 106 is used for storing row in anaerobic tower 103
The biogas gone out.Sewage carries out bio anaerobic reaction in anaerobic tower 103 and produces biogas, and biogas enters biogas storage tank 106 to be carried out
Storing, the biogas of storage may be used for selling and using, so that the energy produced in sewage disposal process can be by sufficiently profit
With, the coordinated development facilitated economic and social.
As it is shown in figure 1, the sewage disposal system that this utility model provides also includes burner 107, burner 107 and biogas
Holding vessel 106 is connected, and burner 107 is regulated in tank 102 to temperature for the biogas provided by burning biogas storage tank 106
Sewage heating.
In order to enable biogas energy to recycle, the sewage disposal system that this utility model provides also includes burner
107, the biogas that burner 107 is provided by burning biogas storage tank 106 heats to the sewage in temperature regulation tank 102, thus
The energy that the sewage disposal system that reaching this utility model provides produces can maximize the effect recycled.
Conventional sewage treatment technology is usually pretreatment → biological treatment → advanced treating, in this utility model, sewage
Temperature regulation tank 102 is entered, in temperature after pretreatment unit 101 carries out lying prone the pretreatment such as slag, aeration desilting, air supporting grease removal
Regulation tank 102 makes the temperature of sewage be increased between 30～38 DEG C by heater, so that sewage can keep higher detesting
Oxygen nitrification activity enters anaerobic tower 103 and carries out microorganism nitration reaction, and sewage is during anaerobic tower 103 carries out anaerobic nitrification
Producing biogas, the biogas of generation enters biogas storage tank 106 and stores, in case selling or using；Biogas storage tank 106 and combustion
Burner 107 is connected, and biogas enters burner 107, and burner 107 regulates the sewage in tank 102 by burning biogas to temperature
Heating, thus avoid using heater to heat to sewage, to reach to save the purpose of the energy；Further, since sewage is at anaerobic tower
Carrying out producing in biological treatment process biogas in 103, burner 107 is added to the sewage of temperature regulation tank 102 by burning biogas
Heat, the sewage after heating carries out anaerobic treatment and produces biogas, enables the energy between temperature regulation tank 102 and anaerobic tower 103
Recycle, reach the purpose that sewage recycling utilizes.
As it is shown in figure 1, in this utility model, temperature regulation tank 102 is connected with anaerobic tower 103 by sewage pump 108.
Sewage pump 108 belongs to the one of centrifugal impurities pump, has submersible type and two kinds of forms of dry type, and the most the most frequently used is latent
Ability of swimming sewage pump is WQ type submerged sewage pump, and the most frequently used dry type sewage pump is the horizontal sewage pump of W type and WL type vertical sump pump.
Sewage pump 108 is mainly for delivery of the sewage of the medium containing the solid particle such as fiber, paper scrap, and the temperature of transported medium is usual
It is not more than 80 DEG C.The twister such as fiber, paper scrap in sewage, during conveying sewage, is stopped by sewage pump 108 by filter screen
Before the suction inlet of sewage pump 108, being allowed to enter pump chamber, so that sewage pump 108 can preferably work, the life-span is more
Long.
In utility model, by sewage pump 108, temperature is regulated the energy increase of the sewage that tank 102 is discharged, in order to
It is transported in anaerobic tower 103, can also avoid the fiber in sewage, paper scrap etc. are transported to anaerobism by sewage pump 108 simultaneously
The inside of tower 103, to improve the efficiency of sewage Anaerobe nitrification in anaerobic tower 103.
In this utility model, in anaerobic tower 103, it is configured with submersible agitator.
Submersible agitator is also known as underwater scooter, it is adaptable to advance stirring containing suspending in the technological process of sewage treatment plant
The sewage of thing, thin mud, industrial process liquid etc., it primarily serves the purpose of establishment current, strengthens agitating function, prevents mud from sinking
Form sediment, be that city has stable political situation the visual plant in industrial sewage treatment technology flow process.Submersible agitator can be applicable to science and engineering at various water
Skill and industrial flow need to keep solid, liquid two-phase or the place of the uniform hybrid reaction of solid, liquid, gas three-phase medium.
The bottom of anaerobic tower 103 is provided with discharge pipeline, and sewage carries out anaerobic nitrification reaction degraded in anaerobic tower 103 and given birth to
Become organic pollution (also referred to as activated sludge) along with in anaerobic tower 103 prolongation of residence time constantly gather, in order to
Avoid affecting the efficiency of the Anaerobe nitration reaction of sewage in anaerobic tower 103, need to be entered organic pollution by discharge pipeline
Row discharge.This utility model is provided with submersible agitator in the bottom of anaerobic tower 103, and organic pollution is carried out by submersible agitator
Stirring, can either strengthen the activity of organic pollution, additionally it is possible to avoid organic pollution detesting by the stirring of submersible agitator
The bottom deposit of oxygen column 103, causes mud discharging difficulty, affect the efficiency of anerobic sowage biological nitration in anaerobic tower, causes dropping
The sewage treating efficiency of the sewage disposal system that low this utility model provides.It should be noted that sewage pump 108 needs only to arrange
Return valve, backing up of sewage backflow during to prevent sewage pump 108 from quitting work.
The submersible agitator that this utility model provides carries out batch (-type) auto-controll operation, before spoil disposal, submersible agitator
During stopping stirring more than at least 30 minutes, spoil disposal, agitator continues to quit work, in order to mud discharging.
In this utility model, anaerobic tower 103 is connected by two-way pipeline with membrane biological reaction pond 104, duplex channel
Including spoil disposal pipeline and sludge return pipe.The organic pollution that the bottom of anaerobic tower 103 is discharged enters film by spoil disposal pipeline
In biological reaction pool 104, membrane biological reaction pond 104 is adsorbed further by membrane bioreaction reply organic pollution and is given birth to
Thing is degraded, and the water after membrane biological reaction pond 104 processes can reach discharge standard through detection, to being difficult to organic dirt of degrading
Dye thing returns to, in anaerobic tower 103, re-start Anaerobe nitration reaction by sludge reflux passage together with activated sludge.
As it is shown in figure 1, the sewage disposal system that this utility model provides also includes back purge system 109, it is used for cleaning film
Biological reaction pool 104.
Membrane biological reaction pond 104 is that a kind of new type water combined with biological processing unit by film separation unit processes dress
Put.Film reaction pond 104 be internally provided with filter membrane, organic pollution carries out high efficient solid and liquid separation by filter membrane so that its
Reach discharge standard.Back purge system 109 be in order to make membrane biological reaction pond 104 normally work employing the flushed filter membrane of reverse water
Device.
When using back purge system, the water that back purge system is provided is back through filter membrane, absorption to be filtered
Blocking material on film rinses out, and makes filter membrane recover filtering function.
In this utility model, membrane biological reaction pond 104 is configured with aerator.
The sewage disposal system that this utility model provides by aerator to membrane biological reaction pond 104 oxygen supplement while, also
The effect of the activated sludge washing away absorption on filter membrane can be played.It addition, in order to prevent temperature from expanding from equipment outer wall
Dissipate, to anaerobic tower 103, heat exchanger 105, temperature regulation tank 102, membrane biological reaction pond 104, and be attached thereto logical pipeline and enter
Row isothermal holding, insulation layer thickness 20～100mm, heat-insulation layer is polyurethane foam material or other rubber-plastic foamed insulation material.
Use above measure, it can be ensured that the leaving water temperature of anaerobic reaction tower maintains >=30 DEG C, the temperature in membrane biological reaction pond 104
>=20 DEG C, the microbial reaction of organic pollution is made to reach optimum efficiency.
Embodiment 2
Sewage disposal system in the present embodiment is the improvement on the basis of embodiment one, the technology disclosed in embodiment one
Content not repeated description, embodiment one disclosure falls within the present embodiment disclosure, and the present embodiment repeats no more.
The present embodiment distinguishes with embodiment one, in the sewage disposal system that the present embodiment provides, and anaerobic tower bag
Including many sub-anaerobic towers, many sub-anaerobic towers are sequentially communicated.
The sewage disposal system that the sewage that the industries such as aquaculture, food, beverage produce is provided by embodiment one can reach
To discharge standard, but the waste water that the industries such as oil exploitation, petrochemical refining, Coal Chemical Industry, medicine produce is complex, by implementing
The sewage disposal system that example one provides can not reach discharge standard.
The anaerobic tower that the present embodiment provides includes that many sub-anaerobic towers, many sub-anaerobic towers are sequentially communicated, and sewage is by many
Individual sub-anaerobic tower repeats Anaerobe nitration reaction, makes the difficult material decomposed in sewage the most more decompose and nitre
Change, so that organic pollution reaches discharge standard after many sub-anaerobic towers process, promote environment and economic coordinated development.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of
Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment technical scheme.
Claims (6)
1. a sewage disposal system, it is characterised in that: include pretreatment unit, temperature regulation tank, anaerobic tower and membrane bioreaction
Ying Chi, described pretreatment unit, described temperature regulation tank, described anaerobic tower, described membrane biological reaction pond are sequentially communicated, described pre-
It is connected between processing means with described anaerobic tower and has heat exchanger；Described heat exchanger is also connected with described temperature regulation tank；Also include
Heater, for the sewage heating in described temperature regulation tank；Also including biogas storage tank, described biogas storage tank is with described
Anaerobic tower is connected；Also including that burner, described burner are connected with described biogas storage tank, described burner is used for passing through
The biogas that the described biogas storage tank that burns provides is to the sewage heating in described temperature regulation tank.
Sewage disposal system the most according to claim 1, it is characterised in that: described temperature regulation tank is by sewage pump and institute
State anaerobic tower to be connected.
Sewage disposal system the most according to claim 1, it is characterised in that: it is configured with submersible agitating in described anaerobic tower
Device.
4. according to the sewage disposal system according to any one of claim 1-3, it is characterised in that: also include back purge system,
For cleaning described membrane biological reaction pond.
5. according to the sewage disposal system according to any one of claim 1-3, it is characterised in that: institute's membrane biological reaction pond configures
There is aerator.
6. according to the sewage disposal system according to any one of claim 1-3, it is characterised in that: described anaerobic tower includes multiple
Sub-anaerobic tower, the plurality of sub-anaerobic tower is sequentially communicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620406307.6U CN205740655U (en) | 2016-05-06 | 2016-05-06 | Sewage disposal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620406307.6U CN205740655U (en) | 2016-05-06 | 2016-05-06 | Sewage disposal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205740655U true CN205740655U (en) | 2016-11-30 |
Family
ID=57369511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620406307.6U Expired - Fee Related CN205740655U (en) | 2016-05-06 | 2016-05-06 | Sewage disposal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205740655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712593A (en) * | 2016-05-06 | 2016-06-29 | 武汉市润之达石化设备有限公司 | Sewage treatment system |
-
2016
- 2016-05-06 CN CN201620406307.6U patent/CN205740655U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712593A (en) * | 2016-05-06 | 2016-06-29 | 武汉市润之达石化设备有限公司 | Sewage treatment system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20210506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |