CN114409097A - Composite aggregate purification carrier - Google Patents
Composite aggregate purification carrier Download PDFInfo
- Publication number
- CN114409097A CN114409097A CN202210118675.0A CN202210118675A CN114409097A CN 114409097 A CN114409097 A CN 114409097A CN 202210118675 A CN202210118675 A CN 202210118675A CN 114409097 A CN114409097 A CN 114409097A
- Authority
- CN
- China
- Prior art keywords
- composite
- aggregate
- carrier
- adhesive
- purification
- 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.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 64
- 238000000746 purification Methods 0.000 title claims abstract description 31
- 241000894006 Bacteria Species 0.000 claims abstract description 29
- 239000000853 adhesive Substances 0.000 claims abstract description 24
- 230000001070 adhesive effect Effects 0.000 claims abstract description 24
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 15
- 108010010803 Gelatin Proteins 0.000 claims abstract description 15
- 229920000159 gelatin Polymers 0.000 claims abstract description 15
- 239000008273 gelatin Substances 0.000 claims abstract description 15
- 235000019322 gelatine Nutrition 0.000 claims abstract description 15
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 15
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 15
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 15
- 239000000661 sodium alginate Substances 0.000 claims abstract description 15
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- 241000194108 Bacillus licheniformis Species 0.000 claims abstract description 9
- 244000063299 Bacillus subtilis Species 0.000 claims abstract description 9
- 235000014469 Bacillus subtilis Nutrition 0.000 claims abstract description 9
- 241000588813 Alcaligenes faecalis Species 0.000 claims abstract description 7
- 229940005347 alcaligenes faecalis Drugs 0.000 claims abstract description 7
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 241000588986 Alcaligenes Species 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 26
- 238000004026 adhesive bonding Methods 0.000 abstract description 5
- 235000015097 nutrients Nutrition 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 238000007885 magnetic separation Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000233866 Fungi Species 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Abstract
The invention provides a composite aggregate purification carrier, which comprises: the composite layer is covered on the surface of the aggregate carrier and is formed by mixing an adhesive and composite bacteria, and the composite bacteria comprise: bacillus subtilis, bacillus licheniformis and alcaligenes faecalis, wherein the adhesive comprises: the adhesive comprises polyvinyl alcohol, sodium alginate and gelatin, wherein the concentration ratio of the polyvinyl alcohol to the sodium alginate to the gelatin is (30-40): 6:1, the thickness of the composite layer is 1-2 mm, and the weight ratio of the adhesive to the composite bacteria is 8: 1. sodium alginate and gelatin in the adhesive not only can realize the gluing effect, but also can provide nutrients for the composite bacteria, so that the composite bacteria can have a longer life cycle, the purification of black and odorous water is facilitated, and the aggregate carrier, the adhesive and the composite bacteria cannot pollute the environment, so that the composite aggregate purification carrier can purify polluted water in an environment-friendly manner.
Description
Technical Field
The invention relates to the field of biological water purification, in particular to a composite aggregate purification carrier.
Background
At present, with the rapid development of national economy, sewage collection and treatment facilities are seriously lagged, so that a large amount of sewage is directly introduced into a river. The black and odorous water bodies in cities of national grade and above are spot-checked by the residential building department, and the spot-check result shows that 1811 black and odorous water bodies exist in 295 cities, wherein 1547 rivers account for 85.4 percent of the total number of the spot-checked black and odorous water bodies; the number of lakes and ponds is 264, which accounts for 14.6 percent of the total number of black and odorous water bodies for spot check. Nowadays, the pollution of foreign sources is increasingly serious, and measures are urgently needed to treat black and odorous water.
The prior advanced treatment measure of the black and odorous water body is a magnetic separation temporary treatment measure, the magnetic separation temporary treatment measure utilizes the magnetism of impurity particles in the wastewater to separate, and the non-magnetic or weakly magnetic particles in the water can be made to have magnetism by utilizing a magnetic inoculation technology. Under the action of an external magnetic field, magnetic suspended solids in the wastewater are separated, so that the aim of purifying the water is fulfilled. However, the temporary pollution control measure of magnetic separation can only remove a part of insoluble pollutants, the removal rate of ammonia nitrogen and total phosphorus is extremely low, the water quality after magnetic separation treatment is still inferior, a large amount of chemical sludge is easily generated in the magnetic separation treatment process, and the chemical sludge can cause secondary pollution to the environment. Therefore, an ecological, environment-friendly and efficient polluted water body purification technology needs to be developed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a composite aggregate purification carrier which can purify polluted water body efficiently and environmentally.
The embodiment of the invention provides a composite aggregate purification carrier, which comprises: the composite layer is covered on the surface of the aggregate carrier and is formed by mixing an adhesive and composite bacteria, and the composite bacteria comprise: bacillus subtilis, bacillus licheniformis and alcaligenes faecalis, wherein the adhesive comprises: the composite bacteria-free antibacterial agent comprises polyvinyl alcohol, sodium alginate and gelatin, wherein the concentration ratio of the polyvinyl alcohol to the sodium alginate to the gelatin is (30-40) to 6:1, the thickness of the composite layer is 1-2 mm, and the weight ratio of the adhesive to the composite bacteria is 8: 1.
In particular, the OD of the Bacillus subtilis, Bacillus licheniformis and Alcaligenes faecalis600Respectively as follows: 4.33, 5.82 and 6.52.
Specifically, the surface of the aggregate carrier is provided with holes, the aperture of each hole is 0.05-2 mm, and the depth of each hole is 0.05-2 mm.
Specifically, the porosity of the surface of the aggregate carrier is 3-50%.
Specifically, the concentration ratio of the polyvinyl alcohol, the sodium alginate and the gelatin is 35: 6: 1.
the composite aggregate purification carrier provided by the embodiment of the invention comprises: the composite layer covers the surface of the aggregate carrier, an adhesive in the composite layer wraps the composite bacteria, so that the composite bacteria can be adsorbed on the aggregate carrier, moreover, the surface of the aggregate carrier has holes, the adhesive can seep into the holes on the surface of the aggregate carrier and is filled in the holes, this causes the complex bacteria to be firmly adhered to the aggregate carrier, which enables the complex bacteria to resist the impact of water flow, thereby realizing high-efficiency purification function in the water body, simultaneously, the sodium alginate and the gelatin in the adhesive not only can realize the gluing function, but also can provide nutrients for the compound bacteria, so that the compound bacteria can have longer life cycle, thereby being more beneficial to the purification of black and odorous water body, and the aggregate carrier, the adhesive and the composite bacteria do not pollute the environment, so that the composite aggregate purification carrier can purify polluted water in an environment-friendly manner.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic illustration of the structure of an enhanced aggregate carrier according to an embodiment of the present invention;
fig. 2 is a partial sectional structural schematic diagram of the improved composite aggregate purification carrier according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Examples
An embodiment of the present invention provides a composite aggregate purification carrier, as shown in fig. 1 and 2, the composite aggregate purification carrier includes: aggregate carrier 1 and composite bed 2, composite bed 2 covers on aggregate carrier 1's surface, and composite bed 2 is formed by gluing agent and compound fungus mixture, and compound fungus includes: bacillus subtilis, bacillus licheniformis and alcaligenes faecalis, the adhesive comprises: the adhesive comprises polyvinyl alcohol, sodium alginate and gelatin, wherein the concentration ratio of the polyvinyl alcohol to the sodium alginate to the gelatin is (30-40): 6:1, the thickness of composite bed 2 is 1 ~ 2mm, and the weight ratio of gluing agent and compound fungus is 8: 1. in implementation, the concentration ratio of the polyvinyl alcohol to the sodium alginate to the gelatin is 35: 6:1, specifically, the concentrations of polyvinyl alcohol, sodium alginate and gelatin were 35%, 6% and 1%, respectively. In this embodiment, the thickness of the composite layer 2 is 1 mm.
During preparation, the composite bacterial liquid, OD of bacillus subtilis, bacillus licheniformis and alcaligenes faecalis are prepared600Respectively as follows: 4.33, 5.82 and 6.52, and the volume ratio of the bacillus subtilis to the bacillus licheniformis to the alcaligenes faecalis is 1: 1:and 1, mixing the adhesive and the composite bacteria to prepare a composite liquid, spraying the composite liquid on the surface of the aggregate carrier 1, and forming a composite layer 2 on the surface of the aggregate carrier 1 by the composite liquid to obtain the composite aggregate purification carrier.
The bacillus subtilis liquid, the bacillus licheniformis liquid and the alcaligenes faecalis liquid have the capacity of decomposing polluted organic matters, and can oxidize and decompose organic carbon sources into non-polar small molecules to complete a COD (chemical oxygen demand) degradation process so as to purify black and odorous water. The composite liquid can form a composite layer 2 on the surface of the aggregate carrier 1 for about 24 hours, and the number of viable bacteria is 4 multiplied by 10 after detection for 24 hours16The number of viable bacteria cfu/g, 48h is 5 multiplied by 1015cfu/g, viable count of 6X 10 in 7 days5cfu/g。
Specifically, the surface of the aggregate carrier 1 is provided with holes 1a, the aperture of the holes 1a can be 0.05-2 mm, and the depth of the holes 1a can be 0.05-2 mm. In this embodiment, the aperture of the hole 1a may be about 0.2mm, and the depth of the hole 1a may be about 0.2mm, and when the aggregate carrier 1 is selected, the size of the hole 1a may be selected according to the above size, and if the size of the hole 1a is too small, the size of the hole 1a may be increased by an acid-base etching method or the like. In practice, the construction waste aggregate may be selected and pulverized to obtain the aggregate carrier 1 having a particle size range of 5 to 80mm, for example, the construction waste brick having a size of 240mm × 115mm × 53mm (length × width × height) may be selected and pulverized, or the aggregate may be a sand aggregate or a concrete aggregate having a particle size of 1 to 80 mm. The aggregate carrier 1 with the particle size of 5-10 mm is preferably selected.
Specifically, the porosity of the aggregate carrier 1 may be 3 to 50%. In the present embodiment, the porosity of the aggregate carrier 1 is 20 to 25%. When the aggregate carrier 1 is selected, the porosity can be selected within the above range, and if the porosity is insufficient, the porosity can be increased by a method such as acid-base etching.
The composite aggregate purification carrier provided by the embodiment of the invention is used for purifying polluted water, the polluted water uses artificial wastewater with Chemical Oxygen Demand (COD) concentration of 500mg/L and ammonia nitrogen concentration of 50mg/L, and the composite aggregate purification carrier for sewage purification is placed in the polluted waterAfter purifying for 3 days in the water body, the total removal rate of COD is 96.42 percent and NH is detected4+The total removal rate of N is 33.56 percent, and the COD concentration is 40.3mg/L and the surface water environmental quality standard is 40mg/L after 8 days of purification, thus the surface water environmental quality standard is close to the surface water environmental quality standard.
The composite aggregate purification carrier provided by the embodiment of the invention comprises: the composite layer covers the surface of the aggregate carrier, an adhesive in the composite layer wraps the composite bacteria, so that the composite bacteria can be adsorbed on the aggregate carrier, moreover, the surface of the aggregate carrier has holes, the adhesive can seep into the holes on the surface of the aggregate carrier and is filled in the holes, this causes the complex bacteria to be firmly adhered to the aggregate carrier, which enables the complex bacteria to resist the impact of water flow, thereby realizing high-efficiency purification function in the water body, simultaneously, the sodium alginate and the gelatin in the adhesive not only can realize the gluing function, but also can provide nutrients for the compound bacteria, so that the compound bacteria can have longer life cycle, thereby being more beneficial to the purification of black and odorous water body, and the aggregate carrier, the adhesive and the composite bacteria do not pollute the environment, so that the composite aggregate purification carrier can purify polluted water in an environment-friendly manner.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A composite aggregate purification carrier, comprising: the composite layer is covered on the surface of the aggregate carrier and is formed by mixing an adhesive and composite bacteria, and the composite bacteria comprise: bacillus subtilis, bacillus licheniformis and alcaligenes faecalis, wherein the adhesive comprises: the adhesive comprises polyvinyl alcohol, sodium alginate and gelatin, wherein the concentration ratio of the polyvinyl alcohol to the sodium alginate to the gelatin is (30-40): 6:1, the thickness of the composite layer is 1-2 mm, and the weight ratio of the adhesive to the composite bacteria is 8: 1.
2. the composite aggregate purification carrier of claim 1, wherein OD of Bacillus subtilis, Bacillus licheniformis and Alcaligenes faecalis600Respectively as follows: 4.33, 5.82cfu/g and 6.52 cfu/g.
3. The composite aggregate purification carrier according to claim 1, wherein the surface of the aggregate carrier is provided with holes, the hole diameter is 0.05-2 mm, and the depth of the hole is 0.05-2 mm.
4. The composite aggregate purification carrier according to claim 1, wherein the porosity of the surface of the aggregate carrier is 3-50%.
5. The composite aggregate purification carrier according to claim 1, wherein the concentration ratio of the polyvinyl alcohol, the sodium alginate and the gelatin is 35: 6: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210118675.0A CN114409097A (en) | 2022-02-08 | 2022-02-08 | Composite aggregate purification carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210118675.0A CN114409097A (en) | 2022-02-08 | 2022-02-08 | Composite aggregate purification carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114409097A true CN114409097A (en) | 2022-04-29 |
Family
ID=81279633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210118675.0A Pending CN114409097A (en) | 2022-02-08 | 2022-02-08 | Composite aggregate purification carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114409097A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007300931A (en) * | 2001-02-21 | 2007-11-22 | Hitachi Plant Technologies Ltd | Heated support, method for producing the same and method for environment decontamination with heated support |
| CN106430617A (en) * | 2016-08-31 | 2017-02-22 | 鑫源鑫（北京）水利工程有限公司 | Biological purification dam |
| CN109019876A (en) * | 2018-09-21 | 2018-12-18 | 曲阜师范大学 | A kind of fixation psychrophile for sewage treatment carbonizes sludge carrier filler and its application |
| CN111995070A (en) * | 2020-08-31 | 2020-11-27 | 天津市晶品环保工程有限公司 | Microbial preparation for repairing black and odorous water body sediment and preparation method thereof |
-
2022
- 2022-02-08 CN CN202210118675.0A patent/CN114409097A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007300931A (en) * | 2001-02-21 | 2007-11-22 | Hitachi Plant Technologies Ltd | Heated support, method for producing the same and method for environment decontamination with heated support |
| CN106430617A (en) * | 2016-08-31 | 2017-02-22 | 鑫源鑫（北京）水利工程有限公司 | Biological purification dam |
| CN109019876A (en) * | 2018-09-21 | 2018-12-18 | 曲阜师范大学 | A kind of fixation psychrophile for sewage treatment carbonizes sludge carrier filler and its application |
| CN111995070A (en) * | 2020-08-31 | 2020-11-27 | 天津市晶品环保工程有限公司 | Microbial preparation for repairing black and odorous water body sediment and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张保民等: "《农药加工技术》", 31 December 1996, 中原农民出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100883436B1 (en) | Non-point pollution source treatment apparatus using biological media and treatment method thereof | |
| CN106430617A (en) | Biological purification dam | |
| Dai et al. | Application of a full-scale newly developed stacked constructed wetland and an assembled bio-filter for reducing phenolic endocrine disrupting chemicals from secondary effluent | |
| KR101900274B1 (en) | non-point pollution source treatment apparatus using biological process | |
| CN214270636U (en) | In-situ ecological restoration system for bottom mud in urban shallow water body | |
| CN114409097A (en) | Composite aggregate purification carrier | |
| CN114409100A (en) | Method for purifying polluted water by combining composite bacteria and aggregate carrier | |
| CN109126733B (en) | Preparation method of modified ceramsite combined filler for adsorbing pollutants | |
| CN106365319A (en) | Artificial wetland matrix combination filling method | |
| CN110282739A (en) | A method of processing low ratio of carbon to ammonium spread source sanitary sewage | |
| CN114436409A (en) | Multilayer composite aggregate purification carrier | |
| Uddin et al. | The role of wastewater treatment technologies in municipal landfill leachate treatment | |
| CN211198752U (en) | Rural sewage treatment system with low carbon-nitrogen ratio | |
| CN109775930B (en) | Method for treating landfill leachate based on GY-3 type filler matrix | |
| CN210215088U (en) | Quick clean system of black and odorous water body | |
| CN114105314A (en) | Water environment restoration material and preparation method thereof | |
| CN109824204B (en) | Method and system for rapidly and efficiently starting and intensively treating landfill leachate | |
| CN114409099A (en) | Aggregate composite purification carrier | |
| CN115611433A (en) | Ecological filter tank for preventing and treating river pollution and method for preventing and treating river pollution | |
| CN2448838Y (en) | Urban underground pipeline type sewage treatment unit | |
| Makisha et al. | Research for waste water treatment technology with low production of excessive active sludge | |
| CN109775929B (en) | Method for treating landfill leachate based on GY-4 type filler matrix | |
| El Gharmali et al. | Impact of acid mining drainage on the quality of superficial waters and sediments in the Marrakesh region, Morocco | |
| CN105585158B (en) | A kind of multi-functional curtain of purification of water quality | |
| CN111072139A (en) | Preparation method of sulfur autotrophic denitrification biological brick and biological brick prepared by same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220429 |
|
| RJ01 | Rejection of invention patent application after publication |