CN202430091U - De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR) - Google Patents
De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR) Download PDFInfo
- Publication number
- CN202430091U CN202430091U CN 201120558658 CN201120558658U CN202430091U CN 202430091 U CN202430091 U CN 202430091U CN 201120558658 CN201120558658 CN 201120558658 CN 201120558658 U CN201120558658 U CN 201120558658U CN 202430091 U CN202430091 U CN 202430091U
- Authority
- CN
- China
- Prior art keywords
- pool
- mbr
- sewage
- anoxic
- pond
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model belongs to the technical field of sewage treatment, and discloses a de-nitrification and phosphorous removal sewage treatment process combining AAOA and MBR. A post anoxic pool is added on the basis of traditional anaerobic-anoxic-oxic technology process. The de-nitrification and phosphorous removal sewage treatment process comprises a anaerobic pool, an anoxic pool, an aerobic pool, the post anoxic pool and the MBR pool which are mutually communicated in sequence, the anaerobic pool, the anoxic pool and the post anoxic pool are respectively provided with a first sewage inlet pipe, a second sewage inlet pipe and a third sewage inlet pipe with adjusting valves, the MBR pool and the aerobic pool are communicated through a first backflow pipe, the aerobic pool and the anoxic pool are communicated through a second backflow pipe, and the post anoxic pool and the anaerobic pool are communicated through a third backflow pipe. According to the sewage treatment process, carbon sources in the sewage can be used efficiently, and de-nitrification and phosphorous removal efficiency of the sewage is improved by changing water inlet and backflow mode; and problems of high power consumption, large room occupation, and no method to efficiently removing pollutants of nitrogen, phosphorus and the like in existing sewage treatment processes are solved. The water outlet quality processed by the method is better than a first level requirement of integrated wastewater discharge standard (GB 8978-1996).
Description
Technical field
The utility model belongs to the urban sewage treatment technology field.
Background technology
The deterioration of water resources, shortage of energy sources and quality of water environment becomes the bottleneck of socio-economic development day by day, and the denitrogenation dephosphorizing usefulness, the reduction WWT energy consumption that improve wastewater treatment rate and degree of treatment, reinforcement sewage work become the task of top priority.Along with the raising of sewage disposal plant effluent water quality, the existing insufficient phenomenon of sewage work's ubiquity carbon source.How to improve existing sewage treatment process carbon source efficient utilization, reduce Pollutant levels in the water outlet, be the current difficult problem that need solve.
In many denitrification dephosphorization techniques, anaerobic-anoxic-aerobic (A
2/ O) technology is because of its function with denitrogenation dephosphorizing, and flow process is simple relatively, thereby receive the favor of domestic and international WWT circle.Data shows according to statistics, and to 2008, China had nearly 240 sewage works to adopt A approximately
2/ O technology, its general design processing power reaches 2,000 ten thousand m approximately
3/ d.But, because denitrogenation and competition and the contradiction of dephosphorization between response matrix (carbon source) and reaction compartment, make this technology be difficult to obtain the effect that good N, P remove simultaneously.How to distribute the running status of this flow process rationally, realize the efficient utilization of limited carbon source in the sewage, become the focus and the difficult point of current research.
Membrane Bio-reactor Technology (MBR) is the product that membrane separation technique and dirty water living creature processing technique organically combine; This technology replaces the muddy water gravity settling separation process in the traditional active sludge treating processes with ultra, microfiltration membrane sepn process; Owing to adopt membrane sepn, can keep very high biota concentration and very excellent water outlet effect.This technology has advantages such as effluent quality is good, floor space is little, excess sludge discharge is few, not influenced by the mud expansible, capacity of resisting impact load is strong, level of automation is high, and operational management is easy, is the sewage disposal technology that has development potentiality.But membrane Bio-reactor Technology (MBR) is because its energy consumption is big, equipment price is high, seriously limited applying of it to controlling shortcoming such as strict.As be the pollution on controlling diaphragm surface, need to adopt the mode of blast aeration that the film surface is purged, GWR is 10:1 ~ 20:1 in the general membrane cisterna, causes the membrane cisterna energy consumption to strengthen.
If can the traditional activated sludge process treatment process be combined with the MBR membrane separation technique, can improve effluent quality on the one hand, also can save floor space on the other hand, have application prospects, received investigator's concern at present.But because the high GWR of MBR membrane cisterna; Its mixed solution dissolved oxygen concentration is up to 5.0mg/L ~ 10.0mg/L; If it is not carried out scientific utilization; Not only waste the energy consumption of blast aeration, but also will consume available carbon source in a large amount of sewage, be unfavorable for improving the water outlet effect of a whole set of Sewage treatment systems.
Therefore, should develop one and overlap MBR membrane treatment process and device high-effect, less energy-consumption.
Summary of the invention
The purpose of the utility model is to have proposed the device that a kind of energy consumption is low, practice thrift the AAOA+MBR denitrogenation dephosphorizing sewage treatment process of carbon source, and it is reformed the traditional waste water treatment process flow process, at A
2Increase by an anoxic pond after the/O technology; Change single-point water intake mode traditional in the biochemistry pool and mixed solution inner loop mode simultaneously; Thereby improve the effective rate of utilization of carbon source in the water inlet; With the sewage treatment process AAOA and the MBR process combination of improvement, utilize MBR membrane module high efficiency separation function then, obtain good effluent quality.
The technical scheme of the utility model is following:
The device of AAOA+MBR denitrogenation dephosphorizing sewage treatment process; Comprise successively preface contact each other logical anaerobic pond, anoxic pond, Aerobic Pond, back anoxic pond and MBR membrane cisterna; Anaerobic pond, anoxic pond and back anoxic pond are respectively equipped with first sewage water inlet pipe, second sewage water inlet pipe and the 3rd sewage water inlet pipe of band variable valve; The MBR membrane cisterna is provided with the MBR membrane module, and the water outlet of MBR membrane module connects rising pipe, and the MBR membrane cisterna is provided with the mud relief outlet.
Prioritization scheme has:
First return line that first reflux pump is housed is connected the MBR membrane cisterna logical with Aerobic Pond;
Second return line that second reflux pump is housed is connected Aerobic Pond logical with anoxic pond;
The 3rd return line that the 3rd reflux pump is housed is connected the back anoxic pond logical with anaerobic pond.
Adopt the AAOA+MBR denitrogenation dephosphorizing sewage treatment process of said apparatus; Through pretreated sewage get into from first sewage water inlet pipe, second sewage water inlet pipe and the 3rd sewage water inlet pipe respectively anaerobic pond, anoxic pond and after anoxic pond; Clear water after the MBR membrane module filters is discharged through rising pipe from its water outlet; Excess sludge is discharged from the mud relief outlet of MBR membrane cisterna; The mean concns of mud is 5～7g/L in anaerobic pond, anoxic pond, Aerobic Pond, the back anoxic pond, and the mean concns of mud is 7～9g/L in the MBR membrane cisterna, and total hrt is 10～20 hours.
MBR membrane cisterna mixed solution can be back to Aerobic Pond through first return line, and quantity of reflux is 3 ~ 5 times of sewage water inlet total amount;
The Aerobic Pond mixed solution can be back to anoxic pond through second return line, and quantity of reflux is 2 ~ 4 times of sewage water inlet total amount;
Back anoxic pond mixed solution can be back to anaerobic pond through the 3rd return line, and quantity of reflux is 1 ~ 3 times of sewage water inlet total amount.
The utlity model has following substantive distinguishing features and progress:
1. carry out WWT with the utility model and can take the multipoint water feeding mode, sewage divides get into each biochemical reaction tank at 3 after the pre-treatment soon, can make full use of the carbon source in the sewage, is respectively denitrifying bacteria and dephosphorization bacterial efficient available high-quality carbon source is provided;
2. the utility model can make full use of the dissolved oxygen in the membrane cisterna with the mixed-liquor return in the MBR membrane cisterna to Aerobic Pond, reduces the blast aeration amount in the Aerobic Pond;
3. the utility model is set up the back anoxic pond behind Aerobic Pond, sets up a water entry to this pond simultaneously, can further improve the utilization ratio of carbon source in the sewage and the denitrogenation ability of this flow process;
4. the utility model can be back to anaerobic pond with the partially mixed liquid of back anoxic pond, for dephosphorization bacterial provides the good phosphorus environment of releasing, thereby realizes the excessive suction phosphorus of polyP bacteria at the back segment aerobic stage.
Description of drawings
Fig. 1, Fig. 2, Fig. 3, Fig. 4 are respectively the device and the method for use synoptic diagram thereof of the utility model;
Among the figure: 1-anaerobic pond; 2-anoxic pond; 3-Aerobic Pond; 4-back anoxic pond; 5-MBR membrane cisterna; 6-MBR membrane module; 7-aerating apparatus; 8-rising pipe; 81-wet-pit; 9-water inlet pipe; 91-main intake pump;
10-the first water transport port; 11-the first sewage water inlet pipe; 12-the first water intaking valve; 13-the three return line; 14-the three reflux pump;
20-the second water transport port; 21-the second sewage water inlet pipe; 22-the second water intaking valve; 23-the second return line; 24-the second reflux pump;
30-the three water transport port; 33-the first return line; 34-the first reflux pump;
40-the four water transport port; 41-the three sewage water inlet pipe; 42-the three water intaking valve.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
With reference to figure 1, Fig. 2, Fig. 3 and Fig. 4, a kind of AAOA+MBR denitrogenation dephosphorizing sewage treatment process and device that the utility model provides include anaerobic pond 1, anoxic pond 2, Aerobic Pond 3, back anoxic pond 4 and MBR membrane cisterna 5 that preface successively connects; Anaerobic pond 1 is communicated with by first water transport port 10 with anoxic pond 2; Anoxic pond 2 is communicated with by second water transport port 20 with Aerobic Pond 3, and Aerobic Pond 3 is communicated with by the 3rd water transport port 30 with back anoxic pond 4, and back anoxic pond 4 is communicated with by the 4th water transport port 40 with MBR membrane cisterna 5; MBR membrane cisterna 5 is provided with MBR membrane module 6 and aerating apparatus 7; The water outlet of MBR membrane module 6 connects rising pipe 8, and rising pipe 8 is provided with wet-pit 81, and MBR membrane cisterna 5 is provided with the mud relief outlet.
First sewage water inlet pipe 11, second sewage water inlet pipe 21 and the 3rd sewage water inlet pipe 41 are connected to main water inlet tube 9; Main water inlet tube 9 is connected with the leading portion polluted water pretreatment apparatus through main intake pump 91;
The other end of first sewage water inlet pipe 11 is connected to anaerobic pond 1, the first sewage water inlet pipe 11 and is provided with first water intaking valve 12;
The other end of second sewage water inlet pipe 21 is connected to anoxic pond 2, the second sewage water inlet pipes 21 and is provided with second water intaking valve 22;
The other end of the 3rd sewage water inlet pipe 41 is connected to back anoxic pond 4, the three sewage water inlet pipes 41 and is provided with the 3rd water intaking valve 42.
The operating parameter that can suitably select the mixed-liquor return amount between each reaction tank to regulate each reaction tank makes to reach the preferred process effect:
Scheme one, as shown in Figure 1, with first return line 33 MBR membrane cisterna 5 is connected with Aerobic Pond 3 logical, serial connection first reflux pump 34 on first return line 33;
Scheme two, as shown in Figure 2, with first return line 33 MBR membrane cisterna 5 is connected with Aerobic Pond 3 logical, serial connection first reflux pump 34 on first return line 33; With second return line 23 Aerobic Pond 3 is connected with anoxic pond 2 logical, serial connection second reflux pump 24 on second return line 23;
Scheme three, as shown in Figure 3, with first return line 33 MBR membrane cisterna 5 is connected with Aerobic Pond 3 logical, serial connection first reflux pump 34 on first return line 33; Will anoxic 4 ponds, back be connected with the 3rd return line 13 and leads to, be connected in series the 3rd reflux pump 14 on the 3rd return line 13 with anaerobic pond 1;
Scheme four, as shown in Figure 4, with first return line 33 MBR membrane cisterna 5 is connected with Aerobic Pond 3 logical, serial connection first reflux pump 34 on first return line 33; With second return line 23 Aerobic Pond 3 is connected with anoxic pond 2 logical, serial connection second reflux pump 24 on second return line 23; Will anoxic 4 ponds, back be connected with the 3rd return line 13 and leads to, be connected in series the 3rd reflux pump 14 on the 3rd return line 13 with anaerobic pond 1.
Concrete operation scheme with preferred embodiment scheme four explanation the utility model is below:
Through leading portion sewage apparatus pretreated sewage get into from first sewage water inlet pipe 11, second sewage water inlet pipe 21 and the 3rd sewage water inlet pipe 41 respectively through main water inlet tube 9 minutes three tunnel with main intake pump 91 anaerobic ponds 1, anoxic pond 2 and after anoxic pond 4; Its water inlet ratio can be respectively regulated through first water intaking valve 12, second water intaking valve 22 and the 3rd water intaking valve 42; The flow direction of sewage is: anaerobic pond 1 → anoxic pond 2 → Aerobic Pond 3 → back anoxic pond 4 → MBR membrane cisterna 5 → MBR membrane module 6 → water outlet, clear water is discharged through rising pipe 8 through wet-pit 81 from the water outlet of MBR membrane module 6.
As required, starting first reflux pump 34 makes the partially mixed liquid of MBR membrane cisterna 5 be back to Aerobic Pond 3 through first return line 33;
As required, starting second reflux pump 24 makes the partially mixed liquid of Aerobic Pond 3 be back to anoxic pond 2 through second return line 23;
As required, starting the 3rd reflux pump 14 makes the partially mixed liquid of back anoxic pond 4 be back to anaerobic pond 1 through the 3rd return line 13.
Present embodiment can be selected three internal circulation systems: one of which is mixed-liquor return to the Aerobic Pond 3 of MBR membrane cisterna 5, its two be Aerobic Pond 3 mixed-liquor returns to anoxic pond 2, its three be back anoxic pond 4 mixed-liquor returns to anaerobic pond 1, total hrt is 14h.Present embodiment is used to handle the Guangzhou municipal effluent, mixes use simultaneously with three internal circulation systems, handles forward and backward water quality data see the following form (mg/L):
| ? | COD | BOD | SS | TN | TP | NH 3-N |
| Water inlet (before handling) | 200~400 | 150~250 | 150~250 | 30~45 | 4~7 | 25~40 |
| Water outlet (handling the back) | 50 | 20 | 5 | 7.5 | 0.4 | 1.5 |
Effluent quality is superior to one-level A standard.
Claims (4)
1.AAOA+MBR the device of denitrogenation dephosphorizing sewage treatment process; Comprise successively preface contact each other logical anaerobic pond (1), anoxic pond (2), Aerobic Pond (3), back anoxic pond (4) and MBR membrane cisterna (5); Anaerobic pond (1) is provided with first sewage water inlet pipe (11) of band variable valve; The MBR membrane cisterna is provided with MBR membrane module (6), and the water outlet of MBR membrane module (6) connects rising pipe (8), and MBR membrane cisterna (5) is provided with the mud relief outlet; It is characterized in that: anoxic pond (2) is provided with second sewage water inlet pipe (21) of band variable valve, and back anoxic pond (4) is provided with the 3rd sewage water inlet pipe (41) of band variable valve.
2. the device of AAOA+MBR denitrogenation dephosphorizing sewage treatment process according to claim 1 is characterized in that: first return line (33) that first reflux pump (34) is housed is connected MBR membrane cisterna (5) logical with Aerobic Pond (3).
3. the device of AAOA+MBR denitrogenation dephosphorizing sewage treatment process according to claim 2 is characterized in that: second return line (23) that second reflux pump (24) is housed is connected Aerobic Pond (3) logical with anoxic pond (2).
4. according to the device of claim 2 or 3 described AAOA+MBR denitrogenation dephosphorizing sewage treatment process, it is characterized in that: the 3rd return line (13) that the 3rd reflux pump (14) is housed is connected back anoxic pond (4) logical with anaerobic pond (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120558658 CN202430091U (en) | 2011-12-28 | 2011-12-28 | De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120558658 CN202430091U (en) | 2011-12-28 | 2011-12-28 | De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202430091U true CN202430091U (en) | 2012-09-12 |
Family
ID=46779557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120558658 Expired - Lifetime CN202430091U (en) | 2011-12-28 | 2011-12-28 | De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202430091U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557342A (en) * | 2011-12-28 | 2012-07-11 | 广州市市政工程设计研究院 | Process and device for treating sewage through denitrification and dephosphorization by anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process |
| CN108483649A (en) * | 2018-05-15 | 2018-09-04 | 江苏凌志环保工程有限公司 | A kind of Orbal/MBR integrated reactors of processing Rural Waste Water |
| CN109250819A (en) * | 2018-11-09 | 2019-01-22 | 北京碧水源科技股份有限公司 | A kind of MBR sewage disposal system of advanced nitrogen dephosphorization |
| CN109534614A (en) * | 2018-12-26 | 2019-03-29 | 河北旭杰环境工程有限公司 | A kind of deep treatment method of high ammonia-nitrogen wastewater |
| CN113955851A (en) * | 2021-08-18 | 2022-01-21 | 北京工业大学 | Post-selection anoxic/aerobic internal carbon source reinforced municipal sewage deep denitrification device and method |
-
2011
- 2011-12-28 CN CN 201120558658 patent/CN202430091U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557342A (en) * | 2011-12-28 | 2012-07-11 | 广州市市政工程设计研究院 | Process and device for treating sewage through denitrification and dephosphorization by anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process |
| CN108483649A (en) * | 2018-05-15 | 2018-09-04 | 江苏凌志环保工程有限公司 | A kind of Orbal/MBR integrated reactors of processing Rural Waste Water |
| CN109250819A (en) * | 2018-11-09 | 2019-01-22 | 北京碧水源科技股份有限公司 | A kind of MBR sewage disposal system of advanced nitrogen dephosphorization |
| CN109250819B (en) * | 2018-11-09 | 2021-09-17 | 北京碧水源科技股份有限公司 | MBR sewage treatment system of degree of depth nitrogen and phosphorus removal |
| CN109534614A (en) * | 2018-12-26 | 2019-03-29 | 河北旭杰环境工程有限公司 | A kind of deep treatment method of high ammonia-nitrogen wastewater |
| CN113955851A (en) * | 2021-08-18 | 2022-01-21 | 北京工业大学 | Post-selection anoxic/aerobic internal carbon source reinforced municipal sewage deep denitrification device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102557342A (en) | Process and device for treating sewage through denitrification and dephosphorization by anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process | |
| CN102557343B (en) | Process and device for treating sewage through denitrification and dephosphorization by oxic-anaerobic-anoxic-oxic (OAAO) plus membrane bioreactor (MBR) process | |
| CN110143725B (en) | Device and method for treating urban sewage by using mixed sludge fermentation liquor as carbon source through continuous flow short-cut denitrification coupling anaerobic ammonia oxidation process | |
| CN105585122B (en) | A kind of high-ammonia nitrogen low C/N is than waste water treatment system and treatment process | |
| CN102531298B (en) | Sewage treatment device and method for enhanced denitrification A/A/O (Anodic Aluminum Oxide) and deoxygenation BAF (Biological Aerated Filter) | |
| CN104030443B (en) | A kind of intensified denitrification and dephosphorization of urban sewage system and treatment process thereof based on fine-grained management | |
| CN102101746B (en) | Low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and method | |
| CN101205100B (en) | Integral combined process treatment reactor for city sewage | |
| CN102583743B (en) | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method | |
| CN105858886A (en) | Multistage anoxic and oxic coupling MBR sewage treatment technology for enhanced nitrogen and phosphorus removal | |
| CN106315853B (en) | Oxidation ditch membrane bioreactor and sewage treatment process and application thereof | |
| CN103030250B (en) | Reinforced-denitrification MBR (membrane bioreactor) sewage treatment method | |
| CN103936231B (en) | A kind of energy-saving inversion A AO-MBR sewage water treatment method | |
| CN202430091U (en) | De-nitrification and phosphorous removal sewage treatment process combining withacetoacetyl-o-anisidine (AAOA) with membrane biological reactor (MBR) | |
| CN104512963A (en) | Integral multistage simultaneous nitrification and denitrification biological membrane system denitrification method and device | |
| CN201141000Y (en) | A2/O and UCT technique integrated composite sewage treatment reactor | |
| CN202688093U (en) | Improved A/O (anoxic/oxic) four-point section-water supply high-efficiency synchronous nitrogen and phosphorus removal device | |
| CN201923926U (en) | Low carbon biological phosphorus removal and autotroph denitrogenation device for municipal sewage | |
| CN202430092U (en) | Device for OAAO+MBR (membrane biological reactor) denitrification and dephosphorization sewage treatment process | |
| CN117886445A (en) | Advanced denitrification sewage treatment method and system for strengthening sludge pre-precipitation concentration | |
| CN203295318U (en) | Integrated denitrifying and dephosphorizing MBR device | |
| CN112607862A (en) | Multistage AO sewage biochemical treatment process | |
| CN202046974U (en) | Highly efficient treatment system for denitrification and dephosphorization of urban sewage | |
| CN218810847U (en) | AAO sewage treatment system of improvement | |
| CN203794754U (en) | Energy-saving type inverted AAO-MBR sewage treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510060 East seat, No. 348 East Ring Road, Guangzhou, Guangdong, Yuexiu District Patentee after: GUANGZHOU MUNICIPAL ENGINEERING DESIGN & RESEARCH INSTITUTE Co.,Ltd. Address before: 510060 East seat, No. 348 East Ring Road, Guangzhou, Guangdong, Yuexiu District Patentee before: GUANGZHOU MUNICIPAL ENGINEERING DESIGN & Research Institute |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 510060 East seat, No. 348 East Ring Road, Guangzhou, Guangdong, Yuexiu District Patentee after: GUANGZHOU MUNICIPAL ENGINEERING DESIGN & Research Institute Address before: 510060 East staircase, No. 348 East Ring Road, Guangzhou, Guangdong Patentee before: GUANGZHOU MUNICIPAL ENG DESIGN & Research Institute |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |
|
| CX01 | Expiry of patent term |