CN111320278A - Method for treating heavy metals in sewage based on scenedesmus tetracaudatum - Google Patents
Method for treating heavy metals in sewage based on scenedesmus tetracaudatum Download PDFInfo
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- CN111320278A CN111320278A CN201811524982.9A CN201811524982A CN111320278A CN 111320278 A CN111320278 A CN 111320278A CN 201811524982 A CN201811524982 A CN 201811524982A CN 111320278 A CN111320278 A CN 111320278A
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 52
- 241000195663 Scenedesmus Species 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000010865 sewage Substances 0.000 title claims abstract description 40
- 238000001179 sorption measurement Methods 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002245 particle Substances 0.000 claims abstract description 23
- 150000002500 ions Chemical class 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 241000195493 Cryptophyta Species 0.000 claims abstract description 9
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 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 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 8
- 239000006285 cell suspension Substances 0.000 claims abstract description 8
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 8
- 239000000661 sodium alginate Substances 0.000 claims abstract description 8
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003795 desorption Methods 0.000 claims abstract description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000001110 calcium chloride Substances 0.000 claims abstract description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 4
- 239000008367 deionised water Substances 0.000 claims abstract description 4
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 4
- 238000001879 gelation Methods 0.000 claims abstract description 4
- 239000011780 sodium chloride Substances 0.000 claims abstract description 4
- 239000006228 supernatant Substances 0.000 claims abstract description 4
- 241000342018 Aegagropila linnaei Species 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 241000195661 Scenedesmus quadricauda Species 0.000 claims description 7
- 229910021536 Zeolite Inorganic materials 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000010457 zeolite Substances 0.000 claims description 7
- 238000005119 centrifugation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000036632 reaction speed Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003403 water pollutant Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to the technical field of sewage treatment methods, and discloses a scenedesmus tetracauda-based method for treating heavy metals in sewage, which comprises the steps of centrifuging scenedesmus tetracauda cell suspension, removing supernatant, cleaning with deionized water, and fixing volume to obtain concentrated scenedesmus tetracauda solution; mixing with sterilized sodium alginate solution, slowly dripping into mixed gelation solution of calcium chloride and sodium chloride at uniform speed, standing to form algae ball, filling into adsorption ball, adding into sewage to adsorb heavy metal ions in sewage, and desorbing for reuse. The adopted adsorption ball has a three-layer adsorption material structure, and can be repeatedly used after being disassembled for desorption treatment; the Scenedesmus tetracaudatus is adopted as the algae species, the method has the advantages of large capacity, strong selectivity, high efficiency and the like, and zeolite particles, activated carbon particles and Scenedesmus tetracaudatus algae contained in the adopted adsorption ball component play an important role in purifying water bodies.
Description
Technical Field
The invention relates to the technical field of sewage treatment methods, in particular to a method for treating heavy metals in sewage based on Scenedesmus quadricaudatus.
Background
In recent years, wastewater containing heavy metals causes great harm to the living environment of human beings, heavy metal ions are discharged along with the wastewater, and even if the concentration of the heavy metal ions is low, the heavy metal ions can cause public nuisance and serious environmental pollution, thereby affecting the health of people. Therefore, the research on how to reduce the content of heavy metals in the wastewater and reduce the pollution of the heavy metals to the environment has great significance. Heavy metals, as a class of conventional water pollutants, are highly toxic and non-degradable, and thus become a very harmful and concerned one of the water pollutants. With the development of industry, the pollution problem of heavy metal is increasingly prominent.
At present, the methods for removing heavy metals in wastewater mainly comprise three methods: firstly, a method for removing heavy metal ions in wastewater by chemical reaction; the second is a method for absorbing, concentrating and separating the heavy metals in the wastewater under the condition of not changing the chemical forms of the heavy metals; thirdly, the method for removing the heavy metals in the wastewater by the flocculation, absorption, accumulation, enrichment and other actions of microorganisms or plants. Among them, the adsorption method is one of the more commonly used methods.
The application provides an adsorption material ball after the combination can carry out effective absorption to the heavy metal in the water.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for treating heavy metals in sewage based on scenedesmus tetrandra, which has the advantages of high removal efficiency, high reaction speed, reusability and the like, and solves the problems of low removal efficiency, low reaction speed and incapability of recycling of the existing method for treating heavy metals in sewage.
(II) technical scheme
In order to realize the purposes of high removal efficiency, high reaction speed and reusability, the invention provides the following technical scheme:
a method for treating heavy metals in sewage based on Scenedesmus tetracaudatus comprises a Scenedesmus tetracaudatus ball preparation method and a method for treating heavy metals in sewage by using adsorption balls, and is characterized in that: the heavy metal ions in the sewage are adsorbed by the coordination of algae balls prepared from Scenedesmus quadricauda and adsorption balls;
the preparation method of Scenedesmus tetracaudatus algal balls comprises the following steps:
(a) centrifuging Scenedesmus tetracaudatus cell suspension, removing supernatant, washing with deionized water for 2-3 times, and diluting to 50mL to obtain concentrated Scenedesmus tetracaudatus solution;
(b) mixing the obtained concentrated Scenedesmus quadricaudatus solution and sterilized sodium alginate solution with mass concentration of 3-5% at volume ratio of 1: 2 to obtain a solution;
(c) sucking the prepared solution for later use by a syringe, sleeving a needle head, slowly and uniformly dripping the solution into a mixed gelation solution of calcium chloride with the mass concentration of 2% and sodium chloride with the mass concentration of 0.3% to form algae balls with the diameter of about 2-3mm, and standing the algae balls for 6-12h at the temperature of 2-6 ℃ to form the immobilized Scenedesmus tetracaudatus algae balls.
The method for treating heavy metal in sewage by using the adsorption balls comprises the following steps:
firstly, manufacturing an adsorption ball, wherein the adsorption ball comprises a spherical plastic shell, a hollow metal inner net, a zeolite particle layer, non-woven gauze and activated carbon particles, the hollow metal inner net is lined on the inner wall of the spherical plastic shell, the zeolite particle layer and the activated carbon particles are sequentially lined inwards on the inner wall of the hollow metal inner net, the non-woven gauze is pasted on the outer wall and the inner wall of each activated carbon particle, and the scenedesmus tetrakamii algae ball is filled in a cavity reserved in the center of each activated carbon particle;
and then putting the adsorption balls filled with Scenedesmus tetracaudatus algae balls into the sewage to start to adsorb heavy metal ions in the sewage, taking out the balls after adsorption is finished, and dismantling the balls for desorption treatment to realize repeated use.
Preferably, the cell density of the Scenedesmus quadricaudatus cell suspension is controlled to be 1 × 106/mL-1 × 107/mL.
Preferably, the centrifugation condition of the scenedesmus tetracaudatus cell suspension is 8000r/min, and the centrifugation time is 5-8 min.
Preferably, the magnetic stirrer is adopted in the preparation process of the standby solution to perform mixing and stirring operation of the concentrated scenedesmus tetracauda solution and the sodium alginate solution, the temperature of the mixing and stirring environment is 16-20 ℃, and the mixing and stirring time is two hours.
Preferably, the syringe for sucking the standby solution adopts a syringe with the specification of 5mL or 10mL and a matched needle.
(III) advantageous effects
Compared with the prior art, the invention provides a method for treating heavy metals in sewage based on Scenedesmus quadricaudatus, which has the following beneficial effects:
1. according to the method for treating heavy metals in sewage based on scenedesmus tetracauda, the adopted adsorption balls have a three-layer adsorption material structure and comprise outer-layer zeolite particles, middle-layer activated carbon particles and inner-layer scenedesmus tetracauda algae balls, so that heavy metal ions in sewage can be effectively adsorbed, and the balls are taken out after adsorption is completed and can be repeatedly used after being disassembled for desorption treatment;
2. the Scenedesmus tetracaudatus is adopted as algae-coccoid algae seeds as a biological adsorbent, the method has the advantages of large capacity, strong selectivity, high efficiency and the like, and Scenedesmus tetracaudatus has strong tolerance to organic pollutants, can be used as indicator organisms in water quality evaluation and is an indicator species of a pollution zone in B type of China;
3. according to the method for treating heavy metals in sewage based on Scenedesmus quadricauda, zeolite particles, activated carbon particles and Scenedesmus quadricauda contained in the adsorption ball component can adsorb heavy metal ions, and also can adsorb partial organic matters, ammonia nitrogen and the like, so that the method plays an important role in purifying water.
Drawings
FIG. 1 is a schematic view of an adsorption sphere structure of a Scenedesmus quadricaudatus-based method for treating heavy metals in sewage according to the present invention;
FIG. 2 is a schematic view of an internal section of an adsorption sphere structure of a Scenedesmus quadricaudatus-based method for treating heavy metals in sewage according to the present invention.
The following are marked in the figure: 1-spherical plastic shell, 2-hollow metal inner net, 3-zeolite particle layer, 4-non-woven gauze, 5-activated carbon particle and 6-Scenedesmus tetracaudatus algae ball.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings 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 of the 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.
Detailed description of the preferred embodiment
The method for treating heavy metals in sewage based on scenedesmus tetracauda provided by the embodiment comprises the following steps:
step 1, centrifuging Scenedesmus quadricaudatus cell suspension with the cell density of 1 × 106/mL for 5min at 8000r/min, removing supernatant, washing with deionized water for 2-3 times, and metering to 50mL to obtain concentrated Scenedesmus quadricaudatus cell solution;
and 3, sucking the prepared solution for later use by using a 5mL or 10mL syringe, sleeving a needle head, slowly and uniformly dripping the solution into a mixed gelation solution of calcium chloride with the mass concentration of 2% and sodium chloride with the mass concentration of 0.3% to form algal balls with the diameter of about 2-3mm, and standing the algal balls for 6-12 hours at the temperature of 2-6 ℃ to form the immobilized Scenedesmus tetracaudatus algal balls 6.
and 5, putting the adsorption balls filled with Scenedesmus tetracaudatus algal balls 6 prepared in the step 4 into sewage to start to adsorb heavy metal ions in the sewage, taking out the balls after adsorption is finished, and dismantling the balls for desorption treatment to ensure that the balls can be repeatedly used.
Detailed description of the invention
In this embodiment, the sodium alginate concentration in step 2 is 4%, and other steps of the scenedesmus tetracaudatus-based method for treating heavy metals in sewage are the same as those in the first embodiment except for step 2.
Detailed description of the preferred embodiment
In this embodiment, the sodium alginate concentration in step 2 is 5%, and other steps of the scenedesmus tetracaudatus-based method for treating heavy metals in sewage are the same as those in the first embodiment except for step 2.
The following table shows the effect experiment of treating part of heavy metal ions in sewage, and it can be seen that the effect of treating sewage by the method of the present invention is better than that of common heavy metal ceramic adsorption balls (control group one) and active carbon adsorption balls (control group two) in the market.
From the above table, the method for treating heavy metals in sewage based on Scenedesmus quadricauda has good adsorption effect on heavy metals, has better effect compared with common heavy metal ceramic adsorption balls (comparison group I) and active carbon adsorption balls (comparison group II) on the market, and can be applied to the field of heavy metal treatment.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for treating heavy metals in sewage based on Scenedesmus tetracaudatus comprises a Scenedesmus tetracaudatus ball (6) preparation method and an adsorption ball treatment method for heavy metals in sewage, and is characterized in that: the heavy metal ions in the sewage are adsorbed by the coordination of algae balls prepared from Scenedesmus quadricauda and adsorption balls;
the preparation method of the Scenedesmus tetracaudatus algae ball (6) comprises the following steps:
(a) centrifuging Scenedesmus tetracaudatus cell suspension, removing supernatant, washing with deionized water for 2-3 times, and diluting to 50mL to obtain concentrated Scenedesmus tetracaudatus solution;
(b) mixing the obtained concentrated Scenedesmus quadricaudatus solution and sterilized sodium alginate solution with mass concentration of 3-5% at volume ratio of 1: 2 to obtain a solution;
(c) sucking the prepared solution for later use by a syringe, sleeving a needle head, slowly and uniformly dripping the solution into a mixed gelation solution of calcium chloride with the mass concentration of 2% and sodium chloride with the mass concentration of 0.3% to form algae balls with the diameter of about 2-3mm, and standing the algae balls for 6-12h at the temperature of 2-6 ℃ to form the immobilized Scenedesmus tetracaudatus algae balls (6).
The method for treating heavy metal in sewage by using the adsorption balls comprises the following steps:
firstly, manufacturing an adsorption ball, wherein the adsorption ball comprises a spherical plastic shell (1), a hollow metal inner net (2), a zeolite particle layer (3), non-woven gauze (4) and activated carbon particles (5), the hollow metal inner net (2) is lined on the inner wall of the spherical plastic shell (1), the zeolite particle layer (3) and the activated carbon particles (5) are sequentially lined inwards on the inner wall of the hollow metal inner net (2), the non-woven gauze (4) is pasted on the outer wall and the inner wall of each activated carbon particle (5), and a Scenedesmus tetracaudatus algae ball (6) is stuffed in a cavity reserved in the center of each activated carbon particle;
and then putting the adsorption balls filled with Scenedesmus tetracaudatus algae balls (6) prepared by the operation into the sewage to start adsorbing heavy metal ions in the sewage, taking out the balls after adsorption is finished, and dismantling the balls for desorption treatment to realize repeated use.
2. The method for treating heavy metals in sewage based on Scenedesmus quadricauda as claimed in claim 1, wherein the cell density of the Scenedesmus quadricauda cell suspension is controlled to be 1 × 106/mL-1 × 107/mL.
3. The scenedesmus tetracaudatus-based method for treating heavy metals in sewage according to claim 1, characterized in that: the centrifugation condition of the scenedesmus tetracaudatus cell suspension is 8000r/min, and the centrifugation time is 5-8 min.
4. The scenedesmus tetracaudatus-based method for treating heavy metals in sewage according to claim 1, characterized in that: the preparation method comprises the following steps of adopting a magnetic stirrer to perform mixing and stirring operation of the concentrated scenedesmus tetracaudatum solution and the sodium alginate solution in the preparation process of the standby solution, wherein the temperature of the mixing and stirring environment is 16-20 ℃, and the mixing and stirring time is two hours.
5. The scenedesmus tetracaudatus-based method for treating heavy metals in sewage according to claim 1, characterized in that: the syringe for sucking the standby solution adopts a syringe with the specification of 5mL or 10mL and a matched needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524982.9A CN111320278A (en) | 2018-12-13 | 2018-12-13 | Method for treating heavy metals in sewage based on scenedesmus tetracaudatum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524982.9A CN111320278A (en) | 2018-12-13 | 2018-12-13 | Method for treating heavy metals in sewage based on scenedesmus tetracaudatum |
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| CN111320278A true CN111320278A (en) | 2020-06-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304034A (en) * | 2013-06-04 | 2013-09-18 | 浙江大学 | Method and device for purifying water body with heavy-metal pollution |
| CN106076278A (en) * | 2016-08-17 | 2016-11-09 | 福州大学 | A kind of method that charcoal base microalgae compound adsorbent removes removing heavy metals |
| CN205914167U (en) * | 2016-08-19 | 2017-02-01 | 农业部环境保护科研监测所 | Sorbead who adsorbs heavy metal ion in water |
| CN107262039A (en) * | 2017-08-10 | 2017-10-20 | 福州大学 | A kind of high-molecular biologic charcoal ball immobilized microalgae compound adsorbent and its preparation and application |
| CN107964544A (en) * | 2018-01-22 | 2018-04-27 | 武汉净宇微藻科技有限公司 | A kind of microalgae algae ball and process for fixation |
-
2018
- 2018-12-13 CN CN201811524982.9A patent/CN111320278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304034A (en) * | 2013-06-04 | 2013-09-18 | 浙江大学 | Method and device for purifying water body with heavy-metal pollution |
| CN106076278A (en) * | 2016-08-17 | 2016-11-09 | 福州大学 | A kind of method that charcoal base microalgae compound adsorbent removes removing heavy metals |
| CN205914167U (en) * | 2016-08-19 | 2017-02-01 | 农业部环境保护科研监测所 | Sorbead who adsorbs heavy metal ion in water |
| CN107262039A (en) * | 2017-08-10 | 2017-10-20 | 福州大学 | A kind of high-molecular biologic charcoal ball immobilized microalgae compound adsorbent and its preparation and application |
| CN107964544A (en) * | 2018-01-22 | 2018-04-27 | 武汉净宇微藻科技有限公司 | A kind of microalgae algae ball and process for fixation |
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Application publication date: 20200623 |
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