CN114477448A - Intelligent integrated advanced denitrification sewage treatment system based on SND (selective non-catalytic reduction) process - Google Patents
Intelligent integrated advanced denitrification sewage treatment system based on SND (selective non-catalytic reduction) process Download PDFInfo
- Publication number
- CN114477448A CN114477448A CN202210137568.2A CN202210137568A CN114477448A CN 114477448 A CN114477448 A CN 114477448A CN 202210137568 A CN202210137568 A CN 202210137568A CN 114477448 A CN114477448 A CN 114477448A
- Authority
- CN
- China
- Prior art keywords
- tank
- treatment system
- snd
- sewage
- ammonia nitrogen
- 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
- 239000010865 sewage Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title abstract description 31
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 78
- 239000012528 membrane Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 18
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 58
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 43
- 230000008878 coupling Effects 0.000 claims description 40
- 238000010168 coupling process Methods 0.000 claims description 40
- 238000005859 coupling reaction Methods 0.000 claims description 40
- 239000000945 filler Substances 0.000 claims description 37
- 230000000813 microbial effect Effects 0.000 claims description 30
- 229910021529 ammonia Inorganic materials 0.000 claims description 29
- 238000012544 monitoring process Methods 0.000 claims description 27
- 238000004659 sterilization and disinfection Methods 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 230000001360 synchronised effect Effects 0.000 claims description 20
- 238000004065 wastewater treatment Methods 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 239000011574 phosphorus Substances 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 244000005700 microbiome Species 0.000 claims description 9
- 244000280244 Luffa acutangula Species 0.000 claims description 8
- 235000009814 Luffa aegyptiaca Nutrition 0.000 claims description 8
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 241000894006 Bacteria Species 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 1
- 238000005273 aeration Methods 0.000 description 15
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 238000005265 energy consumption Methods 0.000 description 6
- 239000003814 drug Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- 230000035755 proliferation Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction 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
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention provides an intelligent integrated advanced denitrification sewage treatment system based on an SND (selective non-catalytic reduction) process, which comprises: the system comprises a pretreatment system, a biochemical treatment system, a deep treatment system and an intelligent management and control system platform; wherein the biochemical processing system comprises: the system comprises an SND reaction tank, an anoxic tank, an aerobic tank and a membrane bioreactor MBR tank; the SND reaction tank, the anoxic tank, the aerobic tank and the MBR tank are used for sequentially treating sewage; the nitrifying liquid in the aerobic tank flows back to the anoxic tank and the SND reaction tank; and the sludge in the MBR tank flows back to the SND reaction tank. The intelligent integrated advanced denitrification sewage treatment system based on the SND process can intelligently and efficiently realize the effluent of sewage treatment to reach the standard, so that the sewage is recycled in an environment-friendly manner, and the pollution of a water basin is reduced.
Description
Technical Field
The application relates to the field of sewage treatment, in particular to an intelligent integrated advanced nitrogen removal sewage treatment system based on an SND (selective non-catalytic reduction) process.
Background
At present, the distributed domestic sewage treatment modes in China mainly comprise integrated sewage treatment equipment taking an activated sludge method, a biological contact oxidation method and the like as core technologies, and ecological treatment schemes taking artificial wetlands, oxidation ponds, stabilization ponds and the like as cores.
However, in practical application, the distributed domestic sewage treatment equipment has the problems of low sewage treatment efficiency, high operation and maintenance cost, high operation difficulty and the like, and from the perspective of practical application, the integrated sewage treatment equipment is particularly suitable for the characteristics of small water quantity and dispersed layout, has the advantages of small floor area, short construction period and the like, is already applied in many areas in China, but still has the problems of low sewage treatment efficiency and substandard effluent.
Therefore, the sewage treatment field needs to be vigorously researched and developed to be intelligent, efficient and low-cost novel integrated sewage treatment system, so that pain points in the use process of the existing integrated sewage treatment equipment are solved, efficient treatment and green recycling of sewage are finally realized, and water basin pollution is reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides an intelligent integrated deep denitrification sewage treatment system based on a synchronous nitrification and denitrification SND process, aiming at the defects in the prior art, the intelligent integrated sewage treatment system which is intelligent, high in sewage treatment efficiency, easy to operate and manage and capable of achieving the effluent standard of sewage treatment is developed.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an intelligent integrated advanced nitrogen removal sewage treatment system based on a synchronous nitrification and denitrification SND process, the sewage treatment system comprises: pretreatment systems and biochemical treatment systems.
The biochemical treatment system includes: the system comprises an SND reaction tank, an anoxic tank, an aerobic tank and a membrane bioreactor MBR tank; the SND reaction tank, the anoxic tank, the aerobic tank and the MBR tank are used for sequentially treating sewage; nitrifying liquid in the aerobic tank flows back to the anoxic tank and the SND reaction tank; and the sludge in the MBR tank flows back to the SND reaction tank.
It should be noted that the biochemical treatment system adopts the treatment process of the SND reaction tank, the anoxic tank, the aerobic tank and the membrane bioreactor MBR tank, and the whole treatment process can greatly reduce the oxygen consumption so as to ensure the normal conditionUnder the condition of no additional carbon source, CODcr and BOD in the domestic sewage can be ensured5Main pollutants such as ammonia nitrogen, total nitrogen and total phosphorus are removed in the SND reaction tank, pollutants in water are further removed in anoxic denitrification and enhanced aerobic nitrification decarburization, and the quality of the effluent of the sewage treatment system is stable and reaches the standard under the condition of ensuring water quantity fluctuation.
In one possible implementation, the membrane bioreactor MBR tank includes: a flat ceramic membrane module; the flat ceramic membrane module is arranged at the middle upper part in the MBR tank and is used for realizing the separation of mud and water.
In one possible implementation, the residence time of the wastewater entering the flat ceramic membrane module is 0.5 h.
The flat ceramic membrane component can greatly improve the sludge concentration from 3000 plus 5000mg/L to 8000 plus 12000mg/L while reducing the construction of a secondary sedimentation tank, and the higher sludge concentration can realize high pollutant removal efficiency, and the sludge flows back to the SND tank.
In one possible implementation, the SND reaction cell includes: a SND reaction zone; the SND reaction zone is provided with at least one SND reaction unit cell.
The SND reaction unit cells are filled with microbial fillers; the microbial filler is obtained by modifying the loofah sponge and is used for providing a growth environment for microbial colonies.
The microbial filler is obtained by modifying pure natural loofah sponge in different modes, is used for domestic sewage with low C/N characteristics, provides an electron acceptor for the sewage with low C/N characteristics in a denitrification process, and can synchronously remove CODcr and BOD in the same sewage treatment unit by combining the microbial filler as a slow-release carbon source with functional bacterial colony of SND on the premise of realizing efficient removal of ammonia nitrogen and total nitrogen5Ammonia nitrogen, total phosphorus and other pollutants.
In one possible implementation, the SND reaction cell includes on the filler: an aerobic zone, an anoxic zone and an anaerobic zone; the method is used for nitrifying ammonia nitrogen and removing most of total nitrogen, and meanwhile, phosphorus-accumulating bacteria absorb phosphorus elements in an aerobic environment to realize synchronous nitrification and denitrification.
The SND flora structure is optimized in the SND reaction unit lattices, aerobic, anoxic and anaerobic areas are formed in one SND reaction unit lattice, the nitrification of ammonia nitrogen and the removal of most of total nitrogen are realized, and phosphorus-accumulating bacteria absorb phosphorus elements in an aerobic environment, so that the requirement of no additional carbon source in the synchronous nitrification and denitrification process is met.
It should be noted that when DO is less than or equal to 2mg/L, the aeration quantity is reduced by 50% compared with the traditional A/O process, SBR process and the like, and the energy consumption is greatly reduced; and because nitrification and denitrification can be realized in the same SND reaction cell, the alkalinity is kept unchanged in the reaction process, alkali is not additionally added in the nitrification process to keep the reaction in a reasonable pH range, and the alkalinity is not required to be added.
In a possible implementation manner, the microbial filler is obtained by modifying loofah sponge by using a 2% NaOH solution, and the filling degree of the microbial filler in the SND reaction unit cell is 10% -20%.
It is to be noted that microorganisms are attached to the modified natural biological carrier, aerobic microorganisms are attached to the outermost layer of the filler, and nitrification reaction is performed to study the modified biological characteristics, the release condition of carbon source, the attachment condition of microorganisms, the dissociation condition of long-term soaking and the like, so as to provide a better environment for the proliferation of microbial flora,
in one example, the microbial filler is a carbon source slow release filler, which can provide a good living environment for microbes.
The microbial filler is a carbon source slow release filler, which can ensure a large specific surface area and provide a good living environment for microorganisms, and in addition, the slow release filler can provide a carbon source for denitrification.
It should be noted that, under the condition that the external carbon source is insufficient in the synchronous nitrification and denitrification process, the carbon source is provided for denitrification as a slow-release carbon source, the separation net is arranged at the outlet of the SND reaction tank to prevent the filler from losing, and the effluent of the SND reaction tank enters the anoxic tank.
In a possible implementation manner, a nitrifying liquid return pipe is arranged at the bottom of the aerobic tank, the nitrifying liquid return pipe is respectively connected with the water inlet of the anoxic tank and the water inlet of the SND tank, and the distribution conditions of the flow of nitrifying liquid returning to the anoxic tank and the SND tank are adjusted according to total nitrogen and ammonia nitrogen.
And a sludge return pipe connected with the SND tank is arranged at the bottom of the MBR tank.
In one possible implementation, the sewage treatment system further includes: a deep processing system; and a sewage inlet of the advanced treatment system is connected with a sewage outlet of the biochemical treatment system.
The advanced treatment system comprises a disinfection tank, and the disinfection tank comprises an ozone generator and an ultraviolet lamp.
It should be noted that the effluent of the biochemical treatment system enters the disinfection tank, the retention time in the disinfection tank is 15min, and the disinfection method using ozone coupled with ultraviolet can ensure that no additional medicament is used when the sewage is deeply treated and disinfected, reduce the use of chemical medicament and further meet the treatment requirement of domestic sewage, and realize the green recycling of domestic sewage.
In one possible implementation, the sewage treatment system further includes: an intelligent management and control system platform.
The intelligent management and control system platform comprises: an intelligent control system for sewage treatment; the sewage treatment intelligent control system comprises: an ammonia nitrogen-dissolved oxygen DO coupling automatic control system.
The ammonia nitrogen-DO coupling automatic control system is connected with the SND reaction tank, and the ammonia nitrogen-DO coupling automatic control system is also connected with the aerobic tank.
The ammonia nitrogen-DO coupling automatic control system is used for monitoring the ammonia nitrogen value in the biochemical treatment system at regular time and adjusting the DO concentration in the biochemical treatment system according to the ammonia nitrogen concentration.
It should be noted that sewage to be treated enters the SND cell, an ammonia nitrogen-DO coupling automatic control system is utilized to realize aeration change, DO is controlled not to be higher than 2mg/L, and therefore the requirements of synchronous nitrification and denitrification are met, and a certain hybrid power is provided. The ammonia nitrogen value in the system is monitored at regular time by an ammonia nitrogen-DO coupling automatic control system, and the ammonia nitrogen value in the biochemical treatment system is less than 10mg/L at the moment, so that the blower keeps running at the original frequency; and if the ammonia nitrogen value is more than 10mg/L, monitoring the DO value in the system at the moment, if the DO concentration is less than 2mg/L, keeping the original frequency of the blower to operate, and if the DO value is more than 2mg/L, reducing the frequency of the blower by 5Hz and then operating. The ammonia nitrogen-DO coupling automatic control system adjusts the frequency of the air blower according to the ammonia nitrogen concentration so as to change the DO concentration in the system, thereby meeting the requirements of the SND reaction tank, saving the energy consumption and providing the shearing force environment required by the biochemical treatment system. The residence time of the system was 8 h. Synchronous nitrification and denitrification are realized in a low dissolved oxygen state.
In a possible implementation mode, the ammonia nitrogen-DO coupling automatic control system is further used for controlling the DO content in the SND reaction cell not to be higher than 2mg/L after the sewage passing through the pretreatment system enters the SND reaction cell.
In one possible implementation, the sewage inlet of the anoxic tank is connected with the sewage outlet of the SND tank.
And a sewage outlet of the SND pool is connected with a sewage inlet of the anoxic pool, the retention time of sewage to be treated in the anoxic pool is 4-5h, and the DO concentration in the anoxic pool is lower than 0.5 mg/L.
In a possible implementation manner, the sewage outlet of the anoxic tank is connected with the sewage inlet of the aerobic tank. The ammonia nitrogen-DO coupling automatic control system is also used for monitoring ammonia nitrogen data of sewage effluent of the aerobic tank at regular time and controlling the ammonia nitrogen value range of effluent of the aerobic tank to be 2-5 mg/L.
The method comprises the following steps of setting the retention time of sewage to be treated in an anoxic tank to be 4h, stirring in the anoxic tank, storing water in the anoxic tank into an aerobic tank, setting the retention time in the aerobic tank to be 4h, utilizing an ammonia nitrogen-DO coupling automatic control system to realize aeration change, monitoring ammonia nitrogen data of outlet water at regular time, controlling DO, increasing the frequency of a blower by 5Hz until the highest frequency is reached or the ammonia nitrogen is reduced to be below 5mg/L if the ammonia nitrogen value is below 2mg/L, and then operating after reducing the frequency of the blower by 5Hz if the ammonia nitrogen value is above 5 mg/L. Until the ammonia nitrogen in the effluent is maintained between 2 and 5mg/L, the demand of aerobic is met, and the energy consumption is saved.
In one possible implementation, the sewage treatment system further includes: a deep processing system; the sewage inlet of the advanced treatment system is connected with the sewage outlet of the biochemical treatment system; the advanced treatment system comprises a disinfection tank, and the disinfection tank comprises an ozone generator and an ultraviolet lamp.
The sewage treatment intelligent control system further comprises: a flow-disinfection coupling system; the flow-disinfection coupling system is connected with the advanced treatment system and is used for controlling the power of the advanced treatment system according to the flow.
In one possible implementation, the membrane bioreactor MBR tank includes: a flat ceramic membrane module.
The sewage treatment intelligent control system further comprises: a membrane pressure difference-cleaning coupling system connected with the MBR tank; the membrane pressure difference-cleaning coupling system is used for determining cleaning frequency according to membrane pressure difference change.
In a possible implementation manner, the intelligent management and control system platform further includes: a water quality monitoring system and a data transmission system.
The water quality monitoring system is connected with the data transmission system and is used for monitoring the ammonia nitrogen value, the COD value and the total nitrogen value of the sewage treatment system and feeding back the monitoring values through the data transmission system.
In one possible implementation mode, the pretreatment system comprises a coarse grating, a water collecting tank, a fine grating and an aeration grit chamber, and is used for removing large particles and sand with high specific gravity in sewage. Compared with the prior art, the intelligent integrated advanced nitrogen removal sewage treatment system based on the SND (synchronous nitrification-denitrification) process has the following beneficial effects:
(1) an ammonia nitrogen-DO coupling automatic control system is constructed in a Synchronous Nitrification and Denitrification (SND) area and an aerobic area to serve as a core system of the equipment, so that the aeration quantity is fully reduced, and accurate aeration is realized;
(2) provides a novel microbial filler for sewage with low C/N characteristics, and the microbial filler can be used as a slow-release carbon source and combined with functional colonies of an SND reaction cell to synchronously remove CODcr and BOD on the premise of efficiently removing ammonia nitrogen and total nitrogen5Ammonia nitrogen, total phosphorus and other pollutants.
(3) The intelligent management and control system is established, the monitoring of the operation condition, the production video and the production index of the water field station is realized by using various novel monitoring instruments and meters which are systematized, standardized and informationized, a management system is uniformly incorporated into a distributed water plant, and finally, the novel integrated sewage treatment equipment and the sewage collection system which are unattended, accurate in aeration, intelligent in maintenance and data multi-terminal transmission are realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic process flow diagram 1 of an integrated domestic sewage treatment system provided in an embodiment of the present application;
fig. 2 is a schematic process flow diagram 2 of the integrated domestic sewage treatment system provided in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1-2 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the 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 embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 and 2, the present application provides an intelligent integrated advanced nitrogen removal sewage treatment system based on a synchronous nitrification and denitrification SND process, the sewage treatment system comprises: pretreatment systems and biochemical treatment systems.
The biochemical treatment system includes: the system comprises an SND reaction tank, an anoxic tank, an aerobic tank and a membrane bioreactor MBR tank; the SND reaction tank, the anoxic tank, the aerobic tank and the MBR tank are used for sequentially treating sewage; nitrifying liquid in the aerobic tank flows back to the anoxic tank and the SND reaction tank; and the sludge in the MBR tank flows back to the SND reaction tank.
It should be noted that the biochemical treatment system adopts the treatment process of the SND reaction tank, the anoxic tank, the aerobic tank and the membrane bioreactor MBR tank, the oxygen consumption can be greatly reduced by the whole treatment process, no additional carbon source is needed under normal conditions, and CODcr and BOD in domestic sewage can be ensured5Main pollutants such as ammonia nitrogen, total nitrogen and total phosphorus are removed in the SND reaction tank, pollutants in water are further removed in anoxic denitrification and enhanced aerobic nitrification decarburization, and the quality of the effluent of the sewage treatment system is stable and reaches the standard under the condition of ensuring water quantity fluctuation.
Example 2
As shown in fig. 1 and fig. 2, the present application further provides an intelligent integrated advanced nitrogen removal sewage treatment system based on a synchronous nitrification-denitrification SND process, the sewage treatment system comprising: pretreatment systems and biochemical treatment systems.
The biochemical treatment system includes: the system comprises an SND reaction tank, an anoxic tank, an aerobic tank and a membrane bioreactor MBR tank; the SND reaction tank, the anoxic tank, the aerobic tank and the MBR tank are used for sequentially treating sewage; the nitrifying liquid in the aerobic tank flows back to the anoxic tank and the SND reaction tank; and the sludge in the MBR tank flows back to the SND reaction tank.
In one example, the membrane bioreactor MBR tank comprises: a flat ceramic membrane module; the flat ceramic membrane module is arranged at the middle upper part in the MBR tank and is used for realizing the separation of mud and water.
In one example, the residence time of the effluent entering the flat ceramic membrane module is 0.5 h.
The flat ceramic membrane component can greatly improve the sludge concentration from 3000 plus 5000mg/L to 8000 plus 12000mg/L while reducing the construction of a secondary sedimentation tank, and the higher sludge concentration can realize high pollutant removal efficiency, and the sludge flows back to the SND tank.
In one example, the SND reaction cell comprises: a SND reaction zone; the SND reaction zone is provided with at least one SND reaction unit cell.
The SND reaction unit cells are filled with microbial fillers; the microbial filler is obtained by modifying the loofah sponge and is used for providing a growth environment for microbial colonies.
The microbial filler is obtained by modifying pure natural loofah sponge in different modes, is used for domestic sewage with low C/N characteristics, provides an electron acceptor for the sewage with the low C/N characteristics in a denitrification process, and can synchronously remove pollutants such as CODcr, BOD5, ammonia nitrogen, total phosphorus and the like in the same sewage treatment unit by combining the microbial filler as a slow-release carbon source with a functional bacterial colony of SND on the premise of realizing the efficient removal of the ammonia nitrogen and the total nitrogen.
In one example, the SND reaction cell includes on the packing: an aerobic zone, an anoxic zone and an anaerobic zone; the method is used for nitrifying ammonia nitrogen and removing most of total nitrogen, and meanwhile, phosphorus-accumulating bacteria absorb phosphorus elements in an aerobic environment to realize synchronous nitrification and denitrification.
The SND flora structure is optimized in the SND reaction unit lattices, aerobic, anoxic and anaerobic areas are formed in one SND reaction unit lattice, the nitrification of ammonia nitrogen and the removal of most of total nitrogen are realized, and phosphorus-accumulating bacteria absorb phosphorus elements in an aerobic environment, so that the requirement that a carbon source is not required to be added in the synchronous nitrification and denitrification process is met.
It should be noted that when DO is less than or equal to 2mg/L, the aeration quantity is reduced by 50% compared with the traditional A/O process, SBR process and the like, and the energy consumption is greatly reduced; and because nitrification and denitrification can be realized in the same SND reaction cell, the alkalinity is kept unchanged in the reaction process, alkali is not additionally added in the nitrification process to keep the reaction in a reasonable pH range, and the alkalinity is not required to be added.
In one example, the microbial filler is obtained by modifying loofah sponge by using a 2% NaOH solution, and the filling degree of the microbial filler in the SND reaction unit cell is 10% -20%.
It is to be noted that microorganisms are attached to the modified natural biological carrier, aerobic microorganisms are attached to the outermost layer of the filler, and nitrification reaction is performed to study the modified biological characteristics, the release condition of carbon source, the attachment condition of microorganisms, the dissociation condition of long-term soaking and the like, so as to provide a better environment for the proliferation of microbial flora,
in one example, the microbial filler is a carbon source slow release filler, which can provide a good living environment for microbes.
The microbial filler is a carbon source slow release filler, which can ensure a large specific surface area and provide a good living environment for microorganisms, and in addition, the slow release filler can provide a carbon source for denitrification.
It should be noted that, under the condition that the external carbon source is insufficient in the synchronous nitrification and denitrification process, the carbon source is provided for denitrification as a slow-release carbon source, the separation net is arranged at the outlet of the SND reaction tank to prevent the filler from losing, and the effluent of the SND reaction tank enters the anoxic tank.
In one example, a nitrifying liquid return pipe is arranged at the bottom of the aerobic tank, the nitrifying liquid return pipe is respectively connected with a water inlet of the anoxic tank and a water inlet of the SND tank, and the flow distribution condition of nitrifying liquid returning to the anoxic tank and the SND tank is adjusted according to total nitrogen and ammonia nitrogen.
And a sludge return pipe connected with the SND tank is arranged at the bottom of the MBR tank.
In one example, the wastewater treatment system further comprises: a deep processing system; and a sewage inlet of the advanced treatment system is connected with a sewage outlet of the biochemical treatment system.
The advanced treatment system comprises a disinfection tank, and the disinfection tank comprises an ozone generator and an ultraviolet lamp.
It should be noted that the effluent of the biochemical treatment system enters the disinfection tank, the retention time in the disinfection tank is 15min, and the disinfection method using ozone coupled with ultraviolet can ensure that no additional medicament is used when the sewage is deeply treated and disinfected, reduce the use of chemical medicament and further meet the treatment requirement of domestic sewage, and realize the green recycling of domestic sewage.
In one example, the pretreatment system comprises a coarse grid, a water collecting tank, a fine grid and an aeration grit chamber, and is used for removing large particles and sand with high specific gravity in sewage.
Example 3
As shown in fig. 1 and 2, the present application provides an intelligent integrated advanced nitrogen removal sewage treatment system based on a synchronous nitrification and denitrification SND process, the sewage treatment system comprises: pretreatment systems and biochemical treatment systems.
The biochemical treatment system includes: the system comprises an SND reaction tank, an anoxic tank, an aerobic tank and a membrane bioreactor MBR tank; the SND reaction tank, the anoxic tank, the aerobic tank and the MBR tank are used for sequentially treating sewage; the nitrifying liquid in the aerobic tank flows back to the anoxic tank and the SND reaction tank; and the sludge in the MBR tank flows back to the SND reaction tank.
In one example, the wastewater treatment system further comprises: an intelligent management and control system platform.
The intelligent management and control system platform comprises: an intelligent control system for sewage treatment; the sewage treatment intelligent control system comprises: an ammonia nitrogen-dissolved oxygen DO coupling automatic control system.
The ammonia nitrogen-DO coupling automatic control system is connected with the SND reaction tank, and the ammonia nitrogen-DO coupling automatic control system is also connected with the aerobic tank.
The ammonia nitrogen-DO coupling automatic control system is used for monitoring the ammonia nitrogen value in the biochemical treatment system at regular time and adjusting the DO concentration in the biochemical treatment system according to the ammonia nitrogen concentration.
It is noted that sewage to be treated enters the SND cell, an ammonia nitrogen-DO coupling automatic control system is utilized to realize aeration change, DO is controlled not to be higher than 2mg/L, and therefore the synchronous requirement is met and a certain shearing environment is provided. The ammonia nitrogen value in the system is monitored at regular time by an ammonia nitrogen-DO coupling automatic control system, and the ammonia nitrogen value in the biochemical treatment system is less than 10mg/L at the moment, so that the blower keeps running at the original frequency; and if the ammonia nitrogen value is more than 10mg/L, monitoring the DO value in the system at the moment, if the DO concentration is less than 2mg/L, keeping the original frequency of the blower to operate, and if the DO value is more than 2mg/L, reducing the frequency of the blower by 5Hz and then operating. The ammonia nitrogen-DO coupling automatic control system adjusts the frequency of the air blower according to the ammonia nitrogen concentration so as to change the DO concentration in the system, thereby meeting the requirements of the SND reaction tank, saving the energy consumption and providing the shearing force environment required by the biochemical treatment system. When the concentration of nitrate nitrogen in the biochemical treatment system is lower than 15mg/L, the biochemical treatment system realizes synchronous nitrification and denitrification in a low dissolved oxygen state.
In one example, the ammonia nitrogen-DO coupling automatic control system is further used for controlling the DO content in the SND reaction cell not to be higher than 2mg/L after the sewage passing through the pretreatment system enters the SND reaction cell.
In one example, the sewage inlet of the anoxic tank is connected with the sewage outlet of the SND tank.
And a sewage outlet of the SND pool is connected with a sewage inlet of the anoxic pool, the retention time of sewage to be treated in the anoxic pool is 4-5h, and the DO concentration in the anoxic pool is lower than 0.5 mg/L.
In one example, the sewage outlet of the anoxic tank is connected with the sewage inlet of the aerobic tank. The ammonia nitrogen-DO coupling automatic control system is also used for monitoring ammonia nitrogen data of sewage effluent of the aerobic tank at regular time and controlling the ammonia nitrogen value range of effluent of the aerobic tank to be 2-5 mg/L.
The method comprises the following steps that the retention time of sewage to be treated entering an anoxic tank is 4 hours, stirring is carried out in the anoxic tank, the stored water in the anoxic tank enters an aerobic tank, the retention time in the aerobic tank is 4 hours, the change of aeration amount is realized by utilizing an ammonia nitrogen-DO coupling automatic control system, the ammonia nitrogen data of outlet water is monitored at regular time, DO is controlled, if the ammonia nitrogen value is more than 5mg/L, the frequency of a blower is increased by 5Hz until the highest frequency is reached or the ammonia nitrogen is reduced to be below 5mg/L, and if the ammonia nitrogen is less than 2mg/L, the blower is operated after the frequency is reduced by 5 Hz. Until the ammonia nitrogen in the effluent is maintained between 2 and 5mg/L, the demand of aerobic is met, and the energy consumption is saved.
Example 4
On the basis of any one of the foregoing embodiments, the sewage treatment system provided in the embodiment of the present application further includes: a deep processing system; the sewage inlet of the advanced treatment system is connected with the sewage outlet of the biochemical treatment system; the advanced treatment system comprises a disinfection tank, and the disinfection tank comprises an ozone generator and an ultraviolet lamp.
The sewage treatment intelligent control system further comprises: a flow-disinfection coupling system; the flow-disinfection coupling system is connected with the advanced treatment system and is used for controlling the power of the advanced treatment system according to the flow.
In one example, the membrane bioreactor MBR tank comprises: a flat ceramic membrane module.
The sewage treatment intelligent control system further comprises: a membrane pressure difference-cleaning coupling system connected with the MBR tank; the membrane pressure difference-cleaning coupling system is used for determining cleaning frequency according to membrane pressure difference change.
In one example, the intelligent management and control system platform further comprises: a water quality monitoring system and a data transmission system.
The water quality monitoring system is connected with the data transmission system and is used for monitoring the ammonia nitrogen value, the COD value and the total nitrogen value of the sewage treatment system and feeding back the monitoring values through the data transmission system.
It should be noted that the intelligent management and control system platform includes a terminal monitoring and control device and a server.
It should be noted that the intelligent sewage treatment control system and the ammonia nitrogen-dissolved oxygen DO coupling automatic control system are both deployed on a monitoring and control device at the tail end and a server.
In one example, the pretreatment system comprises a coarse grid, a water collecting tank, a fine grid and an aeration grit chamber, and is used for removing large particles and sand with large specific gravity in sewage.
Compared with the prior art, the intelligent integrated deep denitrification sewage treatment system based on the SND (synchronous nitrification-denitrification) process has the following beneficial effects:
(1) an ammonia nitrogen-DO coupling automatic control system is constructed in a Synchronous Nitrification and Denitrification (SND) zone and an aerobic zone as a core system of the equipment, so that the aeration quantity is fully reduced, and accurate aeration is realized;
(2) provides a novel microbial filler for sewage with low C/N characteristics, and the microbial filler can be used as a slow-release carbon source and combined with functional bacterial colonies of an SND reaction cell to synchronously remove CODcr and BOD on the premise of efficiently removing ammonia nitrogen and total nitrogen5Ammonia nitrogen, total phosphorus and other pollutants.
(3) The intelligent management and control system is established, the monitoring of the operation condition, the production video and the production index of the water field station is realized by using various novel monitoring instruments and meters which are systematized, standardized and informationized, a management system is uniformly incorporated into a distributed water plant, and finally, the novel integrated sewage treatment equipment and the sewage collection system which are unattended, accurate in aeration, intelligent in maintenance and data multi-terminal transmission are realized.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (17)
1. The utility model provides an intelligence integration degree of depth denitrogenation sewage treatment system based on SND technology which characterized in that, sewage treatment system includes: a pretreatment system and a biochemical treatment system;
the biochemical treatment system includes: the system comprises an SND reaction tank, an anoxic tank, an aerobic tank and a membrane bioreactor MBR tank; the SND reaction tank, the anoxic tank, the aerobic tank and the MBR tank are used for sequentially treating sewage; the nitrifying liquid in the aerobic tank flows back to the anoxic tank and the SND reaction tank; and the sludge in the MBR tank flows back to the SND reaction tank.
2. The wastewater treatment system of claim 1, wherein the MBR tank comprises: a flat ceramic membrane module;
the flat ceramic membrane module is arranged at the middle upper part in the MBR tank and is used for realizing the separation of mud and water.
3. The wastewater treatment system according to claim 2, wherein the residence time of wastewater entering the flat-plate ceramic membrane module is 0.5 h.
4. The wastewater treatment system of claim 1, wherein the SND reaction tank comprises: a SND reaction zone; the SND reaction zone is provided with at least one SND reaction cell;
the SND reaction unit cells are filled with microbial fillers; the microbial filler is obtained by modifying the loofah sponge and is used for providing a growth environment for microbial colonies.
5. The wastewater treatment system of claim 4, wherein the packing in the SND reaction cell comprises: an aerobic zone, an anoxic zone and an anaerobic zone;
the method is used for nitrifying ammonia nitrogen and removing most of total nitrogen, and the phosphorus-accumulating bacteria absorb phosphorus elements in an aerobic environment, so that synchronous nitrification and denitrification are realized.
6. The sewage treatment system of claim 4, wherein the microbial filler is obtained by modifying loofah sponge by using a 2% NaOH solution, and the filling degree of the microbial filler in the SND reaction cell is 10% -20%.
7. The wastewater treatment system of claim 6, wherein the microbial filler is a carbon source slow release filler capable of providing a good living environment for microorganisms.
8. The sewage treatment system according to claim 1, wherein a nitrifying liquid return pipe is arranged at the bottom of the aerobic tank, the nitrifying liquid return pipe is respectively connected with the water inlet of the anoxic tank and the water inlet of the SND tank, and the flow distribution condition of nitrifying liquid returned to the anoxic tank and the SND tank is adjusted according to total nitrogen and ammonia nitrogen;
and a sludge return pipe connected with the SND tank is arranged at the bottom of the MBR tank.
9. The wastewater treatment system of claim 1, further comprising: a deep processing system;
the sewage inlet of the advanced treatment system is connected with the sewage outlet of the biochemical treatment system;
the advanced treatment system comprises a disinfection tank, and the disinfection tank comprises an ozone generator and an ultraviolet lamp.
10. The wastewater treatment system of any of claims 1-9, further comprising: an intelligent management and control system platform;
the intelligent management and control system platform comprises: an intelligent control system for sewage treatment; the sewage treatment intelligent control system comprises: an ammonia nitrogen-dissolved oxygen DO coupling automatic control system;
the ammonia nitrogen-DO coupling automatic control system is connected with the SND reaction tank, and the ammonia nitrogen-DO coupling automatic control system is also connected with the aerobic tank;
the ammonia nitrogen-DO coupling automatic control system is used for monitoring the ammonia nitrogen value in the biochemical treatment system in a timing mode and adjusting the DO concentration in the biochemical treatment system according to the ammonia nitrogen concentration.
11. The wastewater treatment system according to claim 10, wherein the ammonia nitrogen-DO coupled automatic control system is further used for controlling the DO content in the SND reaction cells not higher than 2mg/L after the wastewater passing through the pretreatment system enters the SND reaction cells.
12. The wastewater treatment system according to claim 10, wherein the wastewater inlet of the anoxic tank is connected to the wastewater outlet of the SND tank;
and a sewage outlet of the SND pool is connected with a sewage inlet of the anoxic pool, the retention time of sewage to be treated in the anoxic pool is 4-5h, and the DO concentration in the anoxic pool is lower than 0.5 mg/L.
13. The wastewater treatment system according to claim 10, wherein the wastewater outlet of the anoxic tank is connected to the wastewater inlet of the aerobic tank;
the ammonia nitrogen-DO coupling automatic control system is also used for monitoring ammonia nitrogen data of sewage effluent of the aerobic tank at regular time and controlling the ammonia nitrogen value range of effluent of the aerobic tank to be 2-5 mg/L.
14. The wastewater treatment system of any of claims 10-13, further comprising: a deep processing system; the sewage inlet of the advanced treatment system is connected with the sewage outlet of the biochemical treatment system; the advanced treatment system comprises a disinfection tank, wherein the disinfection tank comprises an ozone generator and an ultraviolet lamp;
the sewage treatment intelligent control system further comprises: a flow-disinfection coupling system; the flow-disinfection coupling system is connected with the advanced treatment system and is used for controlling the power of the advanced treatment system according to the flow.
15. The wastewater treatment system according to any of claims 10-14, wherein the membrane bioreactor MBR tank comprises: a flat ceramic membrane module;
the sewage treatment intelligent control system further comprises: a membrane pressure difference-cleaning coupling system connected with the MBR tank; the membrane pressure difference-cleaning coupling system is used for determining cleaning frequency according to membrane pressure difference change.
16. The wastewater treatment system of claims 10-15, wherein the intelligent management and control system platform further comprises: a water quality monitoring system and a data transmission system;
the water quality monitoring system is connected with the data transmission system and is used for monitoring the ammonia nitrogen value, the COD value and the total nitrogen value of the sewage treatment system and feeding back the monitoring values through the data transmission system.
17. The wastewater treatment system of claim 1, wherein the pretreatment system comprises a coarse grid, a water collecting tank, a fine grid and an aerated grit chamber, and is used for removing large particles and sand with high specific gravity in the wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210137568.2A CN114477448A (en) | 2022-02-15 | 2022-02-15 | Intelligent integrated advanced denitrification sewage treatment system based on SND (selective non-catalytic reduction) process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210137568.2A CN114477448A (en) | 2022-02-15 | 2022-02-15 | Intelligent integrated advanced denitrification sewage treatment system based on SND (selective non-catalytic reduction) process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114477448A true CN114477448A (en) | 2022-05-13 |
Family
ID=81481154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210137568.2A Pending CN114477448A (en) | 2022-02-15 | 2022-02-15 | Intelligent integrated advanced denitrification sewage treatment system based on SND (selective non-catalytic reduction) process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114477448A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116047A (en) * | 2016-08-08 | 2016-11-16 | 苏州方舟环保科技有限公司 | The villages and small towns sewage water treatment method of a kind of high-efficient denitrification and dephosphorization and device |
| CN106542631A (en) * | 2016-10-25 | 2017-03-29 | 深圳市康源环境纳米科技有限公司 | A kind of system and method for Chemical cleaning ceramic membrane |
| CN110028150A (en) * | 2019-04-28 | 2019-07-19 | 江苏省中国科学院植物研究所 | A kind of modularization coupling sewage disposal system |
| CN110510740A (en) * | 2019-08-27 | 2019-11-29 | 危杏 | Sewage simultaneous nitrification-denitrification aeration control system and aeration method |
| CN111960531A (en) * | 2020-07-28 | 2020-11-20 | 北控水务(中国)投资有限公司 | Process and automatic control coupled sewage treatment system and aeration control method thereof |
| CN112479305A (en) * | 2019-09-11 | 2021-03-12 | 上海紫奕光电科技有限公司 | Automatic disinfection system |
| CN113443714A (en) * | 2021-07-28 | 2021-09-28 | 北控水务(中国)投资有限公司 | Sewage deep denitrification treatment device and method |
-
2022
- 2022-02-15 CN CN202210137568.2A patent/CN114477448A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106116047A (en) * | 2016-08-08 | 2016-11-16 | 苏州方舟环保科技有限公司 | The villages and small towns sewage water treatment method of a kind of high-efficient denitrification and dephosphorization and device |
| CN106542631A (en) * | 2016-10-25 | 2017-03-29 | 深圳市康源环境纳米科技有限公司 | A kind of system and method for Chemical cleaning ceramic membrane |
| CN110028150A (en) * | 2019-04-28 | 2019-07-19 | 江苏省中国科学院植物研究所 | A kind of modularization coupling sewage disposal system |
| CN110510740A (en) * | 2019-08-27 | 2019-11-29 | 危杏 | Sewage simultaneous nitrification-denitrification aeration control system and aeration method |
| CN112479305A (en) * | 2019-09-11 | 2021-03-12 | 上海紫奕光电科技有限公司 | Automatic disinfection system |
| CN111960531A (en) * | 2020-07-28 | 2020-11-20 | 北控水务(中国)投资有限公司 | Process and automatic control coupled sewage treatment system and aeration control method thereof |
| CN113443714A (en) * | 2021-07-28 | 2021-09-28 | 北控水务(中国)投资有限公司 | Sewage deep denitrification treatment device and method |
Non-Patent Citations (2)
| Title |
|---|
| 刘建伟等: "《污水生物处理新技术》", 30 September 2016, 中国建材工业出版社 * |
| 唐婕等: "《环保陶瓷生产与应用》", 31 January 2018, 中国建材工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2603464B1 (en) | Treatment of municipal wastewater with anaerobic digestion | |
| CN101357813B (en) | Processing method for domestic garbage leachate | |
| CN101759323B (en) | Treatment combined process for pig farm waste water with high nitrogen content | |
| CN101357812B (en) | Processing method for domestic garbage leachate | |
| CN105384247B (en) | It is a kind of that the method that part denitrification couples Anammox denitrogenation is realized by A/O biomembrane process | |
| CN106977059A (en) | A kind of new and effective sewage disposal system and method | |
| CN210122541U (en) | Intelligent sewage advanced treatment system based on micro-nano bubble technology | |
| US20170066668A1 (en) | Highly effective sewage treatment based on regulation and control of directed electron flow and apparatus thereof | |
| CN110845001B (en) | Method for treating low-carbon urban sewage by polymer-driven denitrification | |
| CN108383320B (en) | Integrated treatment method for livestock and poultry breeding wastewater | |
| CN109205954A (en) | Light electrolysis catalysis oxidation, biochemical treatment high-concentration waste hydraulic art | |
| CN101475287A (en) | Novel membrane-biological membrane reactor system and use thereof | |
| CN114751518B (en) | Alternate aerobic-anaerobic integrated biological treatment device, method and application | |
| CN112174293A (en) | Electric-enhanced bioretention system for removing low-concentration antibiotics | |
| CN113979539B (en) | Light-induced mud film composite autotrophic denitrification technology and reactor | |
| CN109912145B (en) | Aerobic granular sludge power generation device | |
| CN110759585A (en) | Device and method for removing total nitrogen in sewage | |
| CN110540293A (en) | Sewage treatment device and method suitable for large-amplitude fluctuation of water quantity | |
| CN107473382B (en) | Biological treatment method for realizing simultaneous removal of carbon and nitrogen in sewage by controlling dissolved oxygen | |
| CN111018101B (en) | Membrane biofilm culture domestication process and membrane biofilm reaction device for treating high-salinity wastewater | |
| CN210825829U (en) | Improvement type MBR sewage treatment device | |
| CN102198978A (en) | Apparatus for realizing short-cut nitrification by membrane bioreactor and method thereof | |
| CN110563266B (en) | Efficient nitrogen and phosphorus removal process for domestic sewage with low carbon-nitrogen ratio | |
| CN115403150A (en) | Device and method for treating low-carbon-nitrogen-ratio urban sewage by using IFAS-SBR | |
| CN101343117A (en) | High-efficiency low-consumption biological denitrification method for urban sewage |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220513 |