CN206033503U - High salinity sewage treatment plant - Google Patents
High salinity sewage treatment plant Download PDFInfo
- Publication number
- CN206033503U CN206033503U CN201620984225.XU CN201620984225U CN206033503U CN 206033503 U CN206033503 U CN 206033503U CN 201620984225 U CN201620984225 U CN 201620984225U CN 206033503 U CN206033503 U CN 206033503U
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- Prior art keywords
- aeration
- water
- sewage
- high salinity
- backwash
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Abstract
The utility model discloses a high salinity sewage treatment plant, including the equalizing basin that connects gradually, perpendicular three phase fluidized bed, bological aerated filter and middle pond, perpendicular three phase fluidized bed includes: inside is formed with the reaction cylinder of reaction cavity, the interior draft tube of placing the reaction chamber body in, an aerating mechanism, it includes an aeration fan, locates a plurality of first aeration dish under the draft tube and connect an aeration fan and the first aeration pipe of first aeration dish, and locate the play water mechanism directly over the draft tube. The utility model discloses an aspect is through training the bacterial of resistant salt that agrees with mutually rather than inside salinity respectively in perpendicular three phase fluidized bed and bological aerated filter to the bacterial of the resistant salt cooperation sewage treatment who makes formation forms anaerobism district and double oxygen district with improvement sewage treatment efficiency, on the other hand formed oxygen district, draft tube in the draft tube outside, and extrinsic cycle in messenger's suspension filler draft tube, and the promotion is nitrified, the denitrification reacts in turn.
Description
Technical field
This utility model is related to sewage with high salinity treatment technology, more particularly, to a kind of sewage with high salinity processing meanss.
Background technology
Sewage with high salinity is referred at least containing total dissolved solidss TDS (the Total Dissolved that mass fraction is 3.5%
Solid high-concentration waste water), which is mainly derived from sea water, the high-salt wastewater produced during industrial and agricultural production.In high-salt wastewater
Except containing organic contamination beyond the region of objective existence, also containing substantial amounts of inorganic salt, such as Cl-, SO4 2-、Na+、Ca2+Plasma, the presence of these salt
There is obvious inhibitory action to conventional biological treatment.For such waste water, more ripe at present, effective handling process is main
Including physical-chemical process, biochemical process and combinations thereof technique, wherein physical-chemical process mainly has：Electrochemical process, membrane separation process,
Deep oxidation method, ion exchange and burning method.
Although physical-chemical process can a certain degree of process sewage with high salinity, on the one hand which be easily caused the big of the energy
Amount is wasted, and is unfavorable for reducing energy consumption, and another aspect treatment effeciency is low.
Utility model content
The purpose of this utility model is to overcome above-mentioned technical deficiency, proposes a kind of sewage with high salinity processing meanss, is solved
In prior art, physical-chemical process processes sewage with high salinity causes the technical problem that energy consumption is big, treatment effeciency is low.
For reaching above-mentioned technical purpose, the technical solution of the utility model provides a kind of sewage with high salinity processing meanss, bag
Include regulating reservoir, vertical three phase fluidized bed, BAF and the intermediate pool being sequentially connected；Wherein, the vertical three-phase flow
Changing bed includes：
The reaction tube being vertically arranged, is formed with reaction cavity in the reaction tube；
The guide shell of reaction cavity is built in coaxially；
First aeration mechanism, which includes the first Aeration fan, multiple first aeration plates immediately below the guide shell
And connect the first aeration tube of first Aeration fan and first aeration plate；And
With the discharge mechanism being located in directly over the guide shell, the water side of the discharge mechanism and BAF
Water inlet end connection.
Preferably, the discharge mechanism includes outer flow regulating barrels, interior flow regulating barrels, carrier separator, downflow weir, the interior rectification
Cylinder is coaxially built in outer flow regulating barrels and is formed a rectifying cavity between outer flow regulating barrels, between the outer flow regulating barrels and the reaction tube
A water chamber connected with the lower end of the rectifying cavity is formed with, the water side of the carrier separator is connected with the rectifying cavity
Logical, described downflow weir one end is connected with the upper end of the water chamber, the other end is connected with the water inlet end of the BAF.
Preferably, the vertical inside circulation triphase fluidized bed cone-shaped hood for also including that an external diameter from top to bottom gradually increases,
The upper end of the cone-shaped hood is connected with the interior flow regulating barrels, and the guide shell upper end is extended in the cone-shaped hood.
Preferably, the carrier separator is multiple and be arranged circumferentially along the interior flow regulating barrels inwall, described in each
Carrier separator includes：
One cylinder, is provided with multiple sorting holes on the wall of the cylinder side；
The water output cylinder of the cylinder is built in, is formed between the water output cylinder and the cylinder and is separated cavity, institute
State water output cylinder one end through the cylinder and connect with the rectifying cavity, the other end along the cylinder it is axially extending and with institute
State and be formed between cylinder end and the gap for separating cavity connection.
Preferably, the BAF includes reaction tank and the second aeration mechanism, and the second aeration mechanism includes second
Aeration fan, multiple second aeration plates located at reaction tank bottom and connection second Aeration fan and second aeration plate
The second aeration tube.
Preferably, the sewage with high salinity processing meanss include a backwash mechanism, and the backwash mechanism includes being located at
Multiple backwash shower nozzles of the reaction tank bottom, the backwashing pump located at intermediate pool, connect the backwashing pump with it is described
Second backwash tube and the connection backwashing pump and first backwash tube for separating cavity of backwash shower nozzle.
Preferably, first backwash tube includes backwash supervisor annular in shape, connection backwash supervisor and backwash
The connecting tube of pump and multiple backwashes are in charge of, each described backwash be in charge of equal one end and backwash supervisor connect, it is another
End separates cavity connection with described.
Preferably, the high salinity waste water processing system includes a backflow mechanism, and the backflow mechanism includes the first backflow
Pump and the second reflux pump, the water inlet end of first reflux pump is connected with the downflow weir, water side is connected with the regulating reservoir,
The water inlet end of second reflux pump is connected with the reaction tank, water side is connected with the regulating reservoir.
Compared with prior art, this utility model is on the one hand by dividing in vertical three phase fluidized bed and BAF
The salt tolerant strain that Pei Yang mutually do not agree with its internal salinity, so that the salt tolerant strain for being formed coordinates sewage disposal to improve sewage
Treatment effeciency, on the other hand forms aerobic zone in the guide shell, forms anaerobic zone and aerobic area outside guide shell, and make floating stuffing
Guide shell inner-outer circulation, promotes nitrification, denitrification alternation response.
Description of the drawings
Fig. 1 is the attachment structure schematic diagram of sewage with high salinity processing meanss of the present utility model；
Fig. 2 is the A portions enlarged drawing of Fig. 1 of the present utility model；
Fig. 3 is the structural representation of carrier separator of the present utility model；
Fig. 4 is the first aeration plate distribution schematic diagram of the present utility model.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.
Fig. 1～3 are referred to, embodiment of the present utility model provides a kind of sewage with high salinity processing meanss, including successively
The regulating reservoir 1 of connection, vertical three phase fluidized bed 2, BAF 3 and intermediate pool 4；Wherein, the vertical three-phase fluidization
Bed 2 includes：
The reaction tube 21 being vertically arranged, is formed with reaction cavity in the reaction tube 21；
The guide shell 22 of reaction cavity is built in coaxially；
First aeration mechanism 23, it include the first Aeration fan 231, immediately below the guide shell 22 multiple first
First aeration tube 233 of aeration plate 232 and connection first Aeration fan 231 and first aeration plate 232；And
With the discharge mechanism 24 being located in directly over the guide shell 22, water side and the aeration of the discharge mechanism 24 are given birth to
The water inlet end connection in thing filter tank 3.
During sewage disposal, sewage with high salinity is input in regulating reservoir 1 carries out the regulation of pH value, water quality, the water yield first, adjusts
After the completion of entered by the reaction cavity bottom of vertical three phase fluidized bed 2, while add floating stuffing opening the first aeration mechanism
23, after in reaction cavity, water level is to guide shell 22, as multiple first aeration plates 232 are located at immediately below guide shell 22, therefore
During aeration, occur that aeration does not occur outside aeration, guide shell 22 in guide shell 22, so that forming aerobic zone in guide shell 22, lead
Flow cartridge 22 is outer to form anaerobic zone and aerobic area so that form different salt tolerant strains on the floating stuffing added during water inlet.Work as water
Position reach it is a certain amount of after, guide shell 22 is submerged, and in the presence of multiple first aeration plates 232, the suspension in guide shell 22 is filled out
Material is moved from the bottom to top, and the floating stuffing between guide shell 22 and reaction tube 21 is then from top to bottom moved, and is led so as to define
The shuttling movement of floating stuffing inside and outside flow cartridge 22 so that sewage alternately nitrify, anti-nitration reaction, which realizes same
In reaction tube 21, nitrification, the alternating of anti-nitration reaction occur, and which reduce energy resource consumption, construction cost, improve sewage disposal
Efficiency.Wherein, during above-mentioned nitrification, anti-nitration reaction, with the biomembranous depth difference of floating stuffing, in biomembrane
Short distance nitration and anaerobism ammonia nitriding can be formed, so as to further improve the sewage treating efficiency inside and outside the present embodiment guide shell 22
With go ammonia nitrogen rate.
Wherein as shown in figure 4, acting on the cooperation aeration of guide shell 22 to increase by the first aeration mechanism 23, the present embodiment
Multiple first aeration plate, 232 circular arrays are arranged in immediately below the guide shell 22, and multiple first aeration plates 232 are set
Put circular array arrangement to be engaged with guide shell 22, promote the ascending motion of floating stuffing in guide shell 22.
Sewage after vertical three phase fluidized bed 2 is processed enters BAF 3, and cultivates in BAF 3
The salt tolerant strain mutually agreed with its internal salinity is formed, and further sewage is processed.
Wherein, discharge mechanism 24 described in the present embodiment include outer flow regulating barrels 241, interior flow regulating barrels 242, carrier separator 243,
Downflow weir 244, the interior flow regulating barrels 242 are coaxially built in outer flow regulating barrels 241 and are formed a rectification between outer flow regulating barrels 241
Chamber, is formed with a water chamber connected with the lower end of the rectifying cavity, institute between the outer flow regulating barrels 241 and the reaction tube 1
The water side for stating carrier separator 243 is connected with the rectifying cavity, and 244 one end of the downflow weir is connected with the upper end of the water chamber
The logical, other end is connected with the water inlet end of the BAF 3.It is intermittent water inflow when the present embodiment is intake, after the completion of reaction
As activated sludge may pass through carrier separator 243 into rectification intracavity, therefore the sewage of rectifying cavity is entered from carrier separator 243
In sludge it is precipitable, and enter water outlet intracavity then for primary water, the primary water of water outlet intracavity can pass through 244 overflow of downflow weir
Go out.Wherein, when standing, floating stuffing is easily collapsed, and under gravity, is collapsed due to the support for not having water inlet and aeration
The floating stuffing for collapsing mutually can be collided, and make biofilm detachment, the regeneration formed on floating stuffing, so as to provide for water inlet next time
Condition.
The present embodiment is arranged during carrier separator 243 is conducive to exiting water process and separates floating stuffing, it is ensured that rectification intracavity is clear
Floating stuffing is not contained in clear water, the turnover rate of floating stuffing is reduced, and outer flow regulating barrels 241 and interior flow regulating barrels 242 are matched somebody with somebody
Conjunction can reduce the impact that the primary water of rectification intracavity receives reaction zone inside and outside guide shell 22, it is ensured that the clarification of rectification intracavity primary water
Degree.
As shown in Figure 2 and Figure 3, in order to improve the detached harmonious and water outlet efficiency of carrier separator 243, the carrier divides
It is multiple and be arranged circumferentially along 242 inwall of interior flow regulating barrels from device 243, each described carrier separator 243 includes
Multiple sorting holes are provided with the wall of cylinder 243a and water output cylinder 243b, cylinder 243a side, and water output cylinder 243b is built in described
Cylinder 243a is simultaneously formed between the cylinder 243a and separates cavity, and described water output cylinder 243b one end passes through the separation
Cylinder 243a and connect with the rectifying cavity, the other end along the cylinder 243a it is axially extending and with the cylinder 243a ends
Between be formed with and it is described separate cavity connection gap.I.e. primary water enters rectification intracavity by sorting hole, and passes through cylinder
Gap between 243a ends and water output cylinder 243b is entered in water output cylinder 243b, subsequently into rectification intracavity and by downflow weir
244 overflow.
Wherein, each described sorting hole of the present embodiment is the arcuate socket along the cylinder 243a circumferentially, multiple
The sorting hole is axially evenly arranged along the cylinder 243a, can improve the water outlet efficiency of cylinder 243a using arcuate socket.
Vertical three phase fluidized bed 2 described in the present embodiment also includes the cone-shaped hood 25 that an external diameter from top to bottom gradually increases, institute
The upper end for stating cone-shaped hood 25 is connected with the interior flow regulating barrels 242, and 22 upper end of the guide shell is extended in the cone-shaped hood 25.And
And there is between 21 inwall of outer rim and reaction tube of cone-shaped hood 25 gap.When water is strained, sewage is interior by carrying by interior flow regulating barrels 242
Body separator 243 enters rectification intracavity, and in the sewage of rectifying cavity, sludge moves downwardly to guide shell along 25 outer wall of cone-shaped hood
Between 22 and reaction tube 21, and entered by above-mentioned gap during aeration and floating stuffing above inner conical cover 6 is moved to then with sludge
25 upper surface of cone-shaped hood is dropped down onto, so that 25 upper surface of cone-shaped hood forms a flocculate and clarify layer, the flocculate and clarify layer can be with general
Secondary response is carried out between the sewage of water outlet, and which is conducive to improving reaction efficiency.
BAF 3 described in the present embodiment includes reaction tank 31 and the second aeration mechanism 32, the second aeration mechanism 32
Including the second Aeration fan 321, multiple second aeration plates 322 located at 31 bottom of reaction tank and connection second Aeration fan
321 can adopt existing routine with the second aeration tube 323 of second aeration plate 322, the second aeration of the present embodiment mechanism 32
Mode is arranged, and and therefore not to repeat here.
In order to increase wastewater treatment efficiency and avoid equipment from blocking, described in the present embodiment, sewage with high salinity processing meanss include
One backwash mechanism 5, the backwash mechanism 5 include multiple backwash shower nozzles 51 located at 31 bottom of the reaction tank, are located at
The backwashing pump 52 of intermediate pool 4, the second backwash tube 53 for connecting the backwashing pump 52 and the backwash shower nozzle 51, and
The backwashing pump 52 is connected with first backwash tube 54 for separating cavity.Concrete to arrange, backwash head is located at multiple the
Below two aeration plates 322, can be used to carry out backwash to the second aeration plate 322.
Wherein, the first backwash tube 54 includes backwash supervisor 541 annular in shape, connection backwash supervisor 541 and recoil
The connecting tube 542 and multiple backwashes for washing pump 52 is in charge of 543, and 543 equal one end and the backwash are in charge of in each described backwash
541 connection of supervisor, the other end separate cavity connection with described.As, during 243 water outlet of carrier separator, biomembrane is trickle with a small amount of
Floating stuffing may pass through sorting hole into carrier separator 243, and on the one hand which be easily caused separation hole plug, is on the other hand easily going out
It is accumulation in water drum 243b, hardened, and then cause the water side of carrier separator 243 to block, therefore the present embodiment backwash mechanism 5 can
Avoid the blocking of carrier separator 243.
In order to increase the salt resistance ability of salt tolerant strain, described in the present embodiment, high salinity waste water processing system includes a return current machine
Structure, the backflow mechanism include the first reflux pump 6 and the second reflux pump 7, water inlet end and the overflow of first reflux pump 6
Weir 244 connects, water side is connected with the regulating reservoir 1, the water inlet end of second reflux pump 7 is connected with the reaction tank 31,
Water side is connected with the regulating reservoir 1.Due to being high salinity section in the vertical three phase fluidized bed of the present embodiment 2, BAF 3
It is interior for Low-salinity section, the present embodiment stimulates the growth of Facultative Halophiles by the backflow of high salinity section and Low-salinity section, and promotes vertical
The growth of advantage Facultative Halophiles in three phase fluidized bed 2 and BAF 3.
The concrete waste water processes of the sewage with high salinity processing meanss of the present embodiment are as follows：It is first that sewage with high salinity is defeated
Enter to carry out the regulation of pH value, water quality, the water yield in regulating reservoir, entered by the reaction cavity bottom of vertical three phase fluidized bed after the completion of regulation
Enter, while adding floating stuffing, opening the first aeration mechanism and cultivate in sewage resistance to what salinity in reaction cavity was mutually agreed with
Salt strain, after in reaction cavity, water level is to guide shell, as multiple first aeration plates are located at immediately below guide shell, therefore aeration
When, occur that aeration does not occur outside aeration, guide shell in guide shell, so that forming aerobic zone in guide shell, formed outside guide shell
Anaerobic zone and aerobic area so that on the floating stuffing added during water inlet, form different salt tolerant strains, i.e., aerobic Facultative Halophiles, anaerobism
Facultative Halophiles and and oxygen Facultative Halophiles, and work as water level reach it is a certain amount of after, guide shell is submerged, in the effect of multiple first aeration plates
Under, the floating stuffing in guide shell is moved from the bottom to top, and the floating stuffing between guide shell and reaction tube is then from top to bottom transported
It is dynamic, so as to define the shuttling movement of floating stuffing inside and outside guide shell so that sewage alternately nitrify, denitrification it is anti-
Should, and on suspending carrier, biomembrane can carry out short distance nitration and anaerobism ammonia nitriding, stand, sewage in interior flow regulating barrels after biochemical reaction
Rectification intracavity is entered by carrier separator, sludge is moved downward along taper cover outer wall in sewage, and enters the clarification of water outlet intracavity
Water is gone out by downflow weir overflow；After overflow and the sewage that goes out enter BAF, the second aeration mechanism is opened and in dirt
The salt tolerant strain mutually agreed with salinity in BAF is cultivated in water, to strengthen the biological film process in BAF
Efficiency, enters after process in intermediate pool, and in intermediate pool, sewage can be used for backwash.
Compared with prior art, this utility model is on the one hand by dividing in vertical three phase fluidized bed and BAF
The salt tolerant strain that Pei Yang mutually do not agree with its internal salinity, so that the salt tolerant strain for being formed coordinates sewage disposal to improve sewage
Treatment effeciency, on the other hand forms aerobic zone in the guide shell, forms anaerobic zone and aerobic area outside guide shell, and make floating stuffing
Guide shell inner-outer circulation, promotes nitrification, denitrification alternation response.
The above specific embodiment of the present utility model, does not constitute the restriction to this utility model protection domain.
Any various other corresponding change made according to technology design of the present utility model and deformation, should be included in practical
In new scope of the claims.
Claims (8)
1. a kind of sewage with high salinity processing meanss, it is characterised in that including the regulating reservoir being sequentially connected, vertical three phase fluidized bed,
BAF and intermediate pool；Wherein, the vertical three phase fluidized bed includes：
The reaction tube being vertically arranged, is formed with reaction cavity in the reaction tube；
The guide shell of reaction cavity is built in coaxially；
First aeration mechanism, which includes the first Aeration fan, multiple first aeration plates immediately below the guide shell and company
Connect the first aeration tube of first Aeration fan and first aeration plate；And
With the discharge mechanism being located in directly over the guide shell, the water side of the discharge mechanism and entering for BAF
Water end (W.E.) connects.
2. sewage with high salinity processing meanss according to claim 1, it is characterised in that the discharge mechanism includes outer rectification
Cylinder, interior flow regulating barrels, carrier separator, downflow weir, the interior flow regulating barrels are coaxially built in outer flow regulating barrels and between outer flow regulating barrels
A rectifying cavity is formed, a water outlet connected with the lower end of the rectifying cavity between the outer flow regulating barrels and the reaction tube, is formed with
Chamber, the water side of the carrier separator are connected with the rectifying cavity, and described downflow weir one end is connected with the upper end of the water chamber
The logical, other end is connected with the water inlet end of the BAF.
3. sewage with high salinity processing meanss according to claim 2, it is characterised in that the vertical interior circulation three-phase fluidization
Bed also includes the cone-shaped hood that an external diameter from top to bottom gradually increases, and the upper end of the cone-shaped hood is connected with the interior flow regulating barrels, institute
State guide shell upper end to extend in the cone-shaped hood.
4. sewage with high salinity processing meanss according to Claims 2 or 3, it is characterised in that the carrier separator is many
Individual and be arranged circumferentially along the interior flow regulating barrels inwall, each described carrier separator includes：
One cylinder, is provided with multiple sorting holes on the wall of the cylinder side；
Be built in the water output cylinder of the cylinder, be formed between the water output cylinder and the cylinder and separate cavity, it is described go out
Water drum one end pass through the cylinder and connect with the rectifying cavity, the other end along the cylinder it is axially extending and with described point
It is formed between cylinder end and the gap for separating cavity connection.
5. sewage with high salinity processing meanss according to claim 4, it is characterised in that the BAF includes instead
Answer pond and the second aeration mechanism, the second aeration mechanism includes the second Aeration fan, located at multiple second aerations of reaction tank bottom
Second aeration tube of disk and connection second Aeration fan and second aeration plate.
6. sewage with high salinity processing meanss according to claim 5, it is characterised in that the sewage with high salinity processing meanss
Including a backwash mechanism, the backwash mechanism includes multiple backwash shower nozzles located at the reaction tank bottom, be located at
Between pond backwashing pump, connect the backwashing pump and the second backwash tube of the backwash shower nozzle and connect it is described instead
Flushing pump and first backwash tube for separating cavity.
7. sewage with high salinity processing meanss according to claim 6, it is characterised in that first backwash tube include be in
The backwash supervisor of ring-type, the connecting tube of connection backwash supervisor and backwashing pump and multiple backwashes are in charge of, and each is described anti-
Flushing is in charge of equal one end and separates cavity connection with backwash supervisor's connection, the other end with described.
8. sewage with high salinity processing meanss according to claim 7, it is characterised in that the high salinity waste water processing system
Including a backflow mechanism, the backflow mechanism includes the first reflux pump and the second reflux pump, the water inlet end of first reflux pump
It is connected with the downflow weir, water side is connected with the regulating reservoir, water inlet end and the reaction tank of second reflux pump connect
Connect, water side is connected with the regulating reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620984225.XU CN206033503U (en) | 2016-08-29 | 2016-08-29 | High salinity sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620984225.XU CN206033503U (en) | 2016-08-29 | 2016-08-29 | High salinity sewage treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206033503U true CN206033503U (en) | 2017-03-22 |
Family
ID=58303844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620984225.XU Expired - Fee Related CN206033503U (en) | 2016-08-29 | 2016-08-29 | High salinity sewage treatment plant |
Country Status (1)
| Country | Link |
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| CN (1) | CN206033503U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186364A (en) * | 2016-08-29 | 2016-12-07 | 武汉东川自来水科技开发有限公司 | A kind of sewage with high salinity processing means and sewage water treatment method thereof |
| CN110204057A (en) * | 2019-06-20 | 2019-09-06 | 湖北中地星河环保科技有限公司 | A kind of technique with resistance to denitrifying bacteria processing high-salt sewage with high salt |
-
2016
- 2016-08-29 CN CN201620984225.XU patent/CN206033503U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186364A (en) * | 2016-08-29 | 2016-12-07 | 武汉东川自来水科技开发有限公司 | A kind of sewage with high salinity processing means and sewage water treatment method thereof |
| CN110204057A (en) * | 2019-06-20 | 2019-09-06 | 湖北中地星河环保科技有限公司 | A kind of technique with resistance to denitrifying bacteria processing high-salt sewage with high salt |
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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: 20170322 Termination date: 20210829 |
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| CF01 | Termination of patent right due to non-payment of annual fee |