CN207062096U - Combined integral sewage water advanced treatment apparatus - Google Patents
Combined integral sewage water advanced treatment apparatus Download PDFInfo
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- CN207062096U CN207062096U CN201720711662.9U CN201720711662U CN207062096U CN 207062096 U CN207062096 U CN 207062096U CN 201720711662 U CN201720711662 U CN 201720711662U CN 207062096 U CN207062096 U CN 207062096U
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Abstract
The utility model proposes a kind of combined integral sewage water advanced treatment apparatus, solves the problems, such as sewage disposal device wastewater treatment efficiency difference in the prior art.The utility model includes anaerobic biochemical treatment unit, described pre- anoxic biochemical treatment unit is connected with anaerobic biochemical treatment unit, anaerobic biochemical treatment unit is connected with anoxic biochemical treatment unit, anoxic biochemical treatment unit is connected with aerobic treatment unit, aerobic treatment unit is connected with High-rate sedimentation unit, High-rate sedimentation unit is connected with advanced treatment unit, is connected between advanced treatment unit and package.The advantages of the utility model：Intelligent, easily operated, easy care, stable, investment operating cost is low.
Description
Technical field
It the utility model is related to A/A/A/O（Pre- anoxic+anaerobe-oxygen deficient+aerobic）And MBBR（Moving bed biological film reaction
Device）Sewage disposal device, particularly relate to a kind of combined integral sewage water advanced treatment apparatus.
Background technology
MBBR techniques be by adding a number of suspending carrier into reactor, improve biomass in reactor and
Biological species, so as to improve the treatment effeciency of reactor.Because packing density is close to water, so when aeration, it is in water
It is thoroughly mixed state.Under collision and shear action of the carrier in water, air bubble is more tiny, increases the utilization rate of oxygen.
In addition, being respectively provided with different biological species inside and outside each carrier, some anaerobic bacterias of growth inside or simultaneous oxygen bacterium, outside are preferably supported
Bacterium, so each carrier are a microreactor, make nitration reaction and anti-nitration reaction while exist, so as to improve place
Manage effect.
A/A/A/O techniques are in conventional A/A/O（Anaerobe-oxygen deficient+aerobic）It is biochemical anti-to increase pre- anoxic on the basis of technique
The function of unit, reinforced anaerobic biochemical reaction unit, anoxic biochemical reaction unit and aerobic biochemical reaction unit is answered, is each advantage
Strain creates more superior environment and water project situation.
But the sewage disposal device wastewater treatment efficiency that existing A/A/A/O techniques are combined with MBBR techniques is poor, up for
Further optimization.
Utility model content
The utility model proposes a kind of combined integral sewage water advanced treatment apparatus, solve in the prior art at sewage
The problem of managing equipment wastewater treatment efficiency difference.
What the technical solution of the utility model was realized in：Combined integral sewage water advanced treatment apparatus, including detest
Oxygen biochemical treatment unit, pre- anoxic biochemical treatment unit are connected with anaerobic biochemical treatment unit, and anaerobic biochemical treatment unit is with lacking
Oxygen biochemical treatment unit connects, and anoxic biochemical treatment unit is connected with aerobic treatment unit, aerobic treatment unit and
High-rate sedimentation unit connects, and High-rate sedimentation unit is connected with advanced treatment unit, connected between advanced treatment unit and package.
Described pre- anoxic biochemical treatment unit is connected with the sludge pipe of High-rate sedimentation unit；Anaerobic biochemical treatment unit with
Water inlet pipe connects, and anaerobic biochemical treatment unit is divided into upper and lower part, and upper and lower part is connected by inclined-plane and the pond on top
Footpath is more than the pond footpath of bottom, and the top of anaerobic biochemical treatment unit is provided with sludge enriching apparatus, the bottom of anaerobic biochemical treatment unit
Portion is provided with stirring pipe I, and anaerobic biochemical treatment unit is connected with sewage pipe.
Described anoxic biochemical treatment unit is connected by nitrification liquid return-flow system with aerobic treatment unit, anoxic life
Change processing unit to be connected with sewage pipe, the middle part of anoxic biochemical treatment unit is provided with hanging filler, anoxic biochemical treatment unit
Bottom is provided with stirring pipe II.
Suspension condiment is provided with described aerobic treatment unit, aerobic treatment unit bottom is worn provided with air pocket
Hole aeration tube, connected between air pocket boring aeration pipe and package, between aerobic treatment unit and High-rate sedimentation unit
Provided with uniform flow intercept net.
The middle part of described High-rate sedimentation unit is provided with swash plate, and tracheae is passed through High-rate sedimentation unit bottom and matched somebody with somebody with sludge pipe
Close, connected between tracheae and package, the top of High-rate sedimentation unit is provided with water leg, High-rate sedimentation unit by water leg and
Advanced treatment unit connects.
Described High-rate sedimentation unit is connected with coagulation tank, and coagulation tank is connected with accurate filter, accurate filter with it is comprehensive
Close equipment room connection.
Include swinging blower fan, ultraviolet ray disinfector, intellectualizing system and chemicals dosing plant between described package, turn round
Formula blower fan is connected with tracheae, air pocket boring aeration pipe respectively, and advanced treatment unit is connected with ultraviolet ray disinfector, intellectuality system
System is connected with swinging blower fan, ultraviolet ray disinfector and chemicals dosing plant respectively, the coagulation tank of chemicals dosing plant and High-rate sedimentation unit
Connection.
Present apparatus anaerobic zone can be acidified as the anaerobic acidification section of the system to the larger molecular organicses in waste water
Decompose, form small-molecular-weight organic matter, improve system biodegradability.Optimize the cloth of sludge recirculation system and nitrification liquid return-flow system
Office's structure, activated sludge process and the advantage of biological contact oxidation process is fully combined, intensified denitrification and dephosphorization while COD is reduced
Effect.Pre- anoxic biochemical reaction unit fully removes nitrate and oxygen in returned sludge, ensures that the strict of anaerobic zone is detested
Oxygen environment, and control reduce nitrate to the inhibitory action of anaerobic bacteria, made into the nitrate amount of anaerobic biochemical treatment unit
PolyP bacteria discharges the efficiency of phosphorus in anaerobic zone and greatly improved, it is ensured that it has accordingly been obtained fully in the suction phosphorus efficiency of Aerobic Pond
Lifting, aerobic treatment unit nitrification liquid is back to anoxic biochemical treatment unit and improves present apparatus total nitrogen removal ability.
Enter accurate filter through efficient sedimentation tank oettIed sewage, sewage is flowed into hollow drum, is high on roller
Intensity filter screen.Sewage is filtered out by filter screen Inside To Outside, and the suspension in sewage is trapped within the inside of filter screen.Inner bucket water position reaches
During certain water level, flushing water is rinsed automatically by the high-pressure nozzle at the top of roller from filter screen outside to inner side to filter screen, is rushed
Wash the fine particulate material got off to be collected by the backwashing water collecting tank of device interior, and equipment is sent by blow-off line.When
Anhydrous when passing through equipment, equipment will be automatically stopped operating.
The advantages of the utility model：
By A/A/A/O and MBBR technological principles, micro- hydrodynamics technical principle, biomembrance process technical principle, efficiently heavy
The application of shallow lake technical principle, air lift sewage sludge technical principle, reaction efficiency is improved, improve effluent quality index, reduce investment
And operating cost, saving floor space and engineering time.A kind of intelligent, easily operated, easy care, stable, throwing are provided
Provide the low combined integral sewage-treatment plant of operating cost.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the utility model structure top view.
Fig. 2 is the utility model structural front view.
Fig. 3 is uniform flow intercept net drawing.
In figure：A- anaerobic biochemical treatment units, the pre- anoxic biochemical treatment units of b-, c- anoxic biochemical treatment units, d- are good
Oxygen biochemical treatment unit, e- High-rate sedimentation units, between f- packages, g- advanced treatment units, 1- stirring pipes I, 2- sludge is rich
Acquisition means, 3- air pocket boring aeration pipes, 4- stirring pipes II, 5- tracheae, 6- sludge pipes, 7- water legs, 8- uniform flow intercept nets,
9- hanging fillers, 10- floating stuffings, 11- swash plates, 12- water inlet pipes, 13- nitrification liquid return-flow systems, 14- sewage pipes, 15- revolutions
Formula blower fan, 16- ultraviolet ray disinfectors, 17- intellectualizing systems, 18- chemicals dosing plants, 19- accurate filters, 20- coagulation tanks.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is paid
The every other embodiment obtained, belong to the scope of the utility model protection.
As Figure 1-3, combined integral sewage water advanced treatment apparatus, including anaerobic biochemical treatment unit a, pre- anoxic
Biochemical treatment unit b is connected with anaerobic biochemical treatment unit a, and anaerobic biochemical treatment unit a and anoxic biochemical treatment unit c connects
Connect, anoxic biochemical treatment unit c is connected with aerobic treatment unit d, aerobic treatment unit d and High-rate sedimentation unit e
Connection, High-rate sedimentation unit e are connected with advanced treatment unit g, f connections between advanced treatment unit g and package.
Described pre- anoxic biochemical treatment unit b is connected with High-rate sedimentation unit e sludge pipe 6；Anaerobic biochemical treatment list
First a is connected with water inlet pipe 12, and anaerobic biochemical treatment unit a points be upper and lower part, upper and lower part by inclined-plane connection and
The pond footpath on top is more than the pond footpath of bottom, and anaerobic biochemical treatment unit a top is provided with sludge enriching apparatus 2, at anaerobic biological
Reason unit a bottom is provided with stirring pipe I1, and anaerobic biochemical treatment unit a is connected with sewage pipe 14.
Described anoxic biochemical treatment unit c is connected by nitrification liquid return-flow system 13 with aerobic treatment unit d, is lacked
Oxygen biochemical treatment unit c is connected with sewage pipe 14, and anoxic biochemical treatment unit c middle part is provided with hanging filler 9, at anoxic biochemistry
Reason unit c bottom is provided with stirring pipe II4.
Suspension condiment 10 is provided with described aerobic treatment unit d, aerobic treatment unit d bottoms are provided with air
Steep boring aeration pipe 3, f connections between air pocket boring aeration pipe 3 and package, aerobic treatment unit d and High-rate sedimentation
Uniform flow intercept net 8 is provided between unit e.
Described High-rate sedimentation unit e middle part is provided with swash plate 11, tracheae 5 be passed through High-rate sedimentation unit e bottoms and with dirt
Mud pipe 6 coordinates, f connections between tracheae 5 and package, and High-rate sedimentation unit e top is provided with water leg 7, High-rate sedimentation unit e
It is connected by water leg 7 with advanced treatment unit g.
Described High-rate sedimentation unit e is connected with coagulation tank 20, and coagulation tank 20 is connected with accurate filter 19, secondary filter
F connections between device 19 and package.
F includes swinging blower fan 15, ultraviolet ray disinfector 16, intellectualizing system 17 and dosing dress between described package
18 are put, swinging blower fan 15 is connected with tracheae 5, air pocket boring aeration pipe 3 respectively, advanced treatment unit g and disinfection by ultraviolet light
Device 16 is connected, and intellectualizing system 17 is connected with swinging blower fan 15, ultraviolet ray disinfector 16 and chemicals dosing plant 18 respectively, dosing dress
18 are put to be connected with High-rate sedimentation unit e coagulation tank 20.
Pending first stain disease and sludge are respectively by the water inlet pipe positioned at anaerobic biochemical treatment unit bottom and positioned at pre-
The enters mud pipe on anoxic biochemical treatment unit top enters in the present apparatus, and sludge is completed dirty to backflow in pre- anoxic biochemical treatment unit
The part of nitrate and dissolved oxygen removes in mud, reduces the impact to follow-up anaerobic biochemical treatment unit, ensures at anaerobic biological
Manage the strict anaerobic environment of unit and effective control to nitrate.Pending stain disease is with passing through pre- anoxic biochemical reaction unit
Returned sludge after processing is sufficiently mixed haptoreaction in anaerobic biochemical reaction unit, has in anaerobic unit anaerobic bacteria is using water
Machine thing fully discharges phosphorus and energy storage.Anaerobic biochemical treatment unit bottom increases Gas Stirring pipe to prevent bottom deposit sludge, stirs
Mix pipe and intermittent stirring is carried out by automatic control device, on anaerobic biochemical treatment unit top, Chi Jing expands, and muddy water is in this point
From, effectively catching anaerobic sludge, increase anaerobic unit sludge quantity, raising anaerobic unit treatment effect.At anaerobic biological unit
Waste water after reason enters anoxic biochemical reaction unit, and reaction is sufficiently mixed with the backflow nitrification liquid of aerobic biochemical reaction member,
This removes nitrate in water removal, realizes that total nitrogen removes, and hanging filler is provided with anoxic biochemical reaction unit pond to increase biomass, bottom
Portion is provided with Gas Stirring pipe, prevents bottom deposit sludge, and stirring pipe carries out intermittent stirring by automatic control device.Through anoxic list
Member processing after waste water enter aerobic biochemical reaction member, aerobic bacteria biochemical degradation effect go down water removal in organic matter with
Ammonia nitrogen, while phosphorus of the phosphorus bacterium in this large amount of absorption water is inhaled, aerobic treatment unit is provided with boring aeration pipe, and aeration tube both sides are double-deck
Perforate simultaneously sets anti-clogging mudhole in bottom, thoroughly solves the maintenance and maintenance of aerating system, uses and suspend in aerobic unit
Filler, floating stuffing make to be in vivo suspended state, the mutual collisional mixing under Gas Stirring, cut bubble, and increase water body is disorderly
Flow degree, gas-liquid interface resistance to mass tranfer is reduced, improve oxygen utilization efficiency.Aerobic unit water outlet is gone out using uniform flow intercept net
Water, it is circular layout, substantially reduces the inhomogeneities of floating stuffing, uniform flow intercept net percent opening is high, and aperture is suitable, is not easy to block up
Plug.Waste water after aerobic unit is handled enters High-rate sedimentation unit, carries out mud-water separation herein, sewage is through water-distributing device in height
Imitate sedimentation basin bottom to enter in pond, collected after sloping plate deposition by water leg and enter advanced treatment unit, sewage is through dosing coagulation
Flow into afterwards in the hollow drum of accurate filter, be high intensity filter screen on roller.Sewage is filtered out by filter screen Inside To Outside, sewage
In suspension be trapped within the inside of filter screen.When inner bucket water position reaches certain water level, flushing water passes through the high pressure spray at the top of roller
Head rinses the backwash of the fine particulate material got off by device interior from being rinsed automatically to filter screen to inner side on the outside of filter screen
Water collecting groove is collected, and is discharged by blow-off line.When it is anhydrous pass through equipment when, equipment will be automatically stopped operating.Through accurate mistake
Waste water after filter processing enters ultra violet sterilizer, the final qualified discharge of sterilized rear waste water, efficient sedimentation tank base sludge
A part is back to pre- anoxic unit, and another part is further processed as excess sludge into storage basin.
The utility model has the following advantages compared with prior art：
1. anaerobic biochemical reaction unit leading portion sets up pre- anoxic biochemical treatment unit, nitrate and oxygen in returned sludge are reduced
Gas content, ensure the absolute anaerobic environment of follow-up anaerobic biological unit, mitigate inhibitory action of the Nitrates to anaerobic bacteria.
2. pre- anoxic biochemical reaction unit only handles returned sludge, sludge back flow quantity can be adjusted, and pending waste water is direct
Into anaerobic biochemical reaction unit, the content of the easily biodegradable organicses in pending waste water will not be consumed, ensures follow-up anaerobism list
Member has the easily biodegradable organicses of abundance.
3. anaerobic biochemical reaction unit bottom uses air pocket air intermittent stirring, mixing time interval can adjust, and utilize
Blower fan wind regime supply is turned round, it is large-minded small adjustable, mixing plant input is reduced, while energy consumption and maintenance expense can also be reduced
With.
4. the top gradual change of anaerobic biochemical reaction unit is expanding, top is connected with bottom by inclined-plane, slip face is formed, because upper
Portion pond footpath becomes big, and upflow velocity reduces, and muddy water is easily separated, and forms mud-water separating area on top, retains anaerobic sludge, improves
Anaerobism bacteria biomass, strengthen Anaerobic Treatment effect.
5. anoxic biochemical reaction unit sets suspension elastic biological filler, elastic filler has that specific surface area is big, anti-load
Ability is strong, and elastic filler energy stereoscopic and omnibearing in effective coverage is uniformly abound with, and gas and water, biomembrane is obtained fully mixed ooze and connects
Touch and exchange, moreover it is possible to obtain more and more big specific surface area in the process of running.
6. anoxic biochemical reaction unit bottom uses air pocket air intermittent stirring, using blower fan wind regime supply is turned round, subtract
Few mixing plant input, while energy consumption and maintenance cost can also be reduced.
7. aerobic biochemical reaction member uses boring aeration pipe, aeration tube aeration is uniform, provided with anti-clogging mudhole, structure
Simply it is hardly damaged, without safeguarding.
8. aerobic biochemical reaction member is had using floating stuffing, specific surface area is big, hydrophily is good, bioactivity is high, biofilm
It hurry up, carrier is suspended in water in reactor after biofilm, is rotated freely under the stirring of aerating system, in biomembrane and water body
Pollutant contacts very abundant, filler mutual collisional mixing under Gas Stirring, cuts bubble, increases the amount of microbubble, increase
Water body turbulence level, gas-liquid interface resistance to mass tranfer is reduced, improve oxygen utilization efficiency.
9. aerobic biochemical reaction member uses uniform flow intercept net, intercept net is circular layout, and avoids current short-circuit, can make to hang
Floating filler is more evenly distributed in pond body, in addition the perforate of intercept net entirety homogeneous solid, effectively can prevent filler from blocking.
10. High-rate sedimentation unit uses swash plate and water leg, ensure aqueous suspension lower, water outlet is more uniform.
11. coagulation tank makes suspension and phosphorus easily removal in sewage, it is ensured that effluent quality is up to standard.
12. accurate filter filtering accuracy is up to 10 μm, filter element is complete standard device, and installation operation is simple, mistake
Filter is independent of each other with backwash, and without shutting down backwash, backwash water loss is few, and floor space is set much smaller than other filtering techniques
Standby, power consumption is the 1/4 of other similar filters, and the loss of flood peak is small, and no more than 0.3m, impurity is not easy to be accumulated on filter screen,
Backwash water under high pressure easily removes impurity, 0.3 of backwash water less than active sand filtration backwashing water amount.
13. sludge reflux uses stripping reflux, stripping reflux, which can utilize, turns round blower fan offer origin, reduces equipment and throws
Enter, reduce energy consumption, air-lift device is simple in construction, reduces and safeguards.
Stably reached 14. water outlet can reach《Urban wastewater treatment firm pollutant emission standard》GB18918-2002 one-levels A
Standard.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (5)
1. combined integral sewage water advanced treatment apparatus, including anaerobic biochemical treatment unit（a）, it is characterised in that：Pre- anoxic
Biochemical treatment unit（b）With anaerobic biochemical treatment unit（a）Connection, anaerobic biochemical treatment unit（a）With anoxic biochemical treatment list
Member（c）Connection, anoxic biochemical treatment unit（c）With aerobic treatment unit（d）Connection, aerobic treatment unit（d）With
High-rate sedimentation unit（e）Connection, High-rate sedimentation unit（e）With advanced treatment unit（g）Connection, advanced treatment unit（g）With it is comprehensive
Close equipment room（f）Connection；
Described pre- anoxic biochemical treatment unit（b）With High-rate sedimentation unit（e）Sludge pipe（6）Connection；Anaerobic biochemical treatment
Unit（a）With water inlet pipe（12）Connection, anaerobic biochemical treatment unit（a）It is divided into upper and lower part, upper and lower part passes through inclined-plane
Connect and the pond footpath on top is more than the pond footpath of bottom, anaerobic biochemical treatment unit（a）Top be provided with sludge enriching apparatus
（2）, anaerobic biochemical treatment unit（a）Bottom be provided with stirring pipe I（1）, anaerobic biochemical treatment unit（a）With sewage pipe（14）Even
Connect；
Described High-rate sedimentation unit（e）With coagulation tank（20）Connection, coagulation tank（20）With accurate filter（19）Connection, it is accurate
Filter（19）Between package（f）Connection.
2. combined integral sewage water advanced treatment apparatus according to claim 1, it is characterised in that：Described anoxic life
Change processing unit（c）Pass through nitrification liquid return-flow system（13）With aerobic treatment unit（d）Connection, anoxic biochemical treatment unit
（c）With sewage pipe（14）Connection, anoxic biochemical treatment unit（c）Middle part be provided with hanging filler（9）, anoxic biochemical treatment unit
（c）Bottom be provided with stirring pipe II（4）.
3. combined integral sewage water advanced treatment apparatus according to claim 1, it is characterised in that：Described aerobic life
Change processing unit（d）It is interior to be provided with suspension condiment（10）, aerobic treatment unit（d）Bottom is provided with air pocket boring aeration pipe
（3）, air pocket boring aeration pipe（3）Between package（f）Connection, aerobic treatment unit（d）With High-rate sedimentation unit
（e）Between be provided with uniform flow intercept net（8）.
4. combined integral sewage water advanced treatment apparatus according to claim 1, it is characterised in that：Described is efficiently heavy
Shallow lake unit（e）Middle part be provided with swash plate（11）, tracheae（5）It is passed through High-rate sedimentation unit（e）Bottom and and sludge pipe（6）Coordinate,
Tracheae（5）Between package（f）Connection, High-rate sedimentation unit（e）Top be provided with water leg（7）, High-rate sedimentation unit（e）
Pass through water leg（7）With advanced treatment unit（g）Connection.
5. combined integral sewage water advanced treatment apparatus according to claim 1, it is characterised in that：Described synthesis is set
Between standby（f）Including swinging blower fan（15）, ultraviolet ray disinfector（16）, intellectualizing system（17）And chemicals dosing plant（18）, revolution
Formula blower fan（15）Respectively with tracheae（5）, air pocket boring aeration pipe（3）Connection, advanced treatment unit（g）With ultraviolet ray disinfector
（16）Connection, intellectualizing system（17）Respectively with swinging blower fan（15）, ultraviolet ray disinfector（16）And chemicals dosing plant（18）Even
Connect, chemicals dosing plant（18）With High-rate sedimentation unit（e）Coagulation tank（20）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720711662.9U CN207062096U (en) | 2017-06-19 | 2017-06-19 | Combined integral sewage water advanced treatment apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720711662.9U CN207062096U (en) | 2017-06-19 | 2017-06-19 | Combined integral sewage water advanced treatment apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207062096U true CN207062096U (en) | 2018-03-02 |
Family
ID=61510007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720711662.9U Expired - Fee Related CN207062096U (en) | 2017-06-19 | 2017-06-19 | Combined integral sewage water advanced treatment apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207062096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358316A (en) * | 2018-05-24 | 2018-08-03 | 上海坤工环境科技有限公司 | Efficient low-consume sewage-treatment plant |
-
2017
- 2017-06-19 CN CN201720711662.9U patent/CN207062096U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358316A (en) * | 2018-05-24 | 2018-08-03 | 上海坤工环境科技有限公司 | Efficient low-consume sewage-treatment plant |
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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: 20180302 Termination date: 20190619 |