CN110078296A - A kind of municipal wastewater processing method - Google Patents

A kind of municipal wastewater processing method Download PDF

Info

Publication number
CN110078296A
CN110078296A CN201910248061.2A CN201910248061A CN110078296A CN 110078296 A CN110078296 A CN 110078296A CN 201910248061 A CN201910248061 A CN 201910248061A CN 110078296 A CN110078296 A CN 110078296A
Authority
CN
China
Prior art keywords
water
heisui river
closestool
draining
primary
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
Application number
CN201910248061.2A
Other languages
Chinese (zh)
Inventor
段士伦
李力
谭虎传
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Zhongyu Environment Management Co Ltd
Original Assignee
Sichuan Zhongyu Environment Management Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sichuan Zhongyu Environment Management Co Ltd filed Critical Sichuan Zhongyu Environment Management Co Ltd
Priority to CN201910248061.2A priority Critical patent/CN110078296A/en
Publication of CN110078296A publication Critical patent/CN110078296A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage

Abstract

The present invention discloses a kind of municipal wastewater processing method, closestool draining, washing draining, kitchen drainage are discharged with independent sewer pipe respectively, Heisui River (closestool discharge sewage) no longer does not need to be handled in cell through cell septic tank or Heisui River, remaining urban life buck only has a small amount of silt, and existing cleaning product mostly uses low-phosphorous formula, so only handling the buck of less pollution, the equipment requirement and technology difficulty of sewage treatment are greatly reduced;In addition other than the direct emission of Heisui River, other drainings are secondary or utilize three times, and Heisui River, which can recycle, makees fertilizer, so fully achieving zero-emission;Again, only Heisui River accounts for the 1/3 of Water usage, cook and drink point ratio it is smaller, it is possible to save water nearly 2/3.

Description

A kind of municipal wastewater processing method
Technical field
The present invention relates to environmental projects, refer in particular to municipal domestic sewage processing method.
Background technique
Water is Source of life, and all things on earth, which is grown, be unable to do without water.Water is both the primary condition of human survival and the preciousness of the mankind Resource is the spring of life.Water has pushed the economic development of the mankind, and the history of the mankind is exactly the littoral hair in major river, ocean What exhibition was got up.One mentions water, this is often again familiar with the mankind a kind of substance only.
General usual 5 to 7 tons of domestic water in January of three-person household, wash water accounts for the 1/3 of whole household waters, water closet With the 1/3 of water spot household water, have a bath, washing one's face accounts for nearly the 1/3 of household, water for kitchen use with water and account for about the 1/10 of household water. Existing pumping equipment is that closestool draining (Heisui River) and washing draining (buck) share a pipeline, by sewage discharge to cell Septic tank, kitchen drainage are then exhausted directly to municipal drainage pipe network.What small region sewage treatment was most difficult to is usage on black water, to technique and is set It is standby more demanding, and then various impurity contents are less easy to handle for urban life cell buck, a large amount of Heisui River and buck at this stage The difficulty and cost of sewage treatment are considerably increased after mixing.Although there is dealer to propose the scheme of various small region sewage treatments, But it is most of to mostly use Heisui River and buck mixed processing, or again by Yu Shuiyu after being first separated by solid-liquid separation in Heisui River in cell It is handled after buck mixing.All need as treatment process through sewage → conditioning tank → primary sedimentation pond → biological contact oxidation pond → Secondary sedimentation tank water outlet, since Heisui River needs to be handled in cell, so septic tank is still built, and multiple processing ponds, meeting Biggish space is occupied, in addition septic tank and blast pool can more or less generate foul smell, influence cell environment health.
General usual 5 to 7 tons of domestic water in January of three-person household, wash water accounts for the 1/3 of whole household waters, draws water Closestool is had a bath, washing one's face accounts for nearly the 1/3 of household, water for kitchen use with water and account for about the 1/ of household water with the 1/3 of water spot household water 10.Existing pumping equipment is that closestool draining (Heisui River) and washing draining (buck) share a pipeline, and sewage discharge is arrived Cell septic tank, kitchen drainage are then exhausted directly to municipal drainage pipe network.What small region sewage treatment was most difficult to is usage on black water, to technique It is higher with equipment requirement, and then various impurity contents are less easy to handle for urban life cell buck, at this stage a large amount of Heisui River and The difficulty and cost of sewage treatment are considerably increased after buck mixing.Although there is dealer to propose the side of various small region sewage treatments Case, but it is most of mostly use Heisui River and buck mixed processing, or again will be remaining after being first separated by solid-liquid separation in Heisui River in cell Water is handled after mixing with buck.It is all needed as treatment process through sewage → conditioning tank → primary sedimentation pond → bio-contact oxidation Pond → secondary sedimentation tank water outlet, since Heisui River needs to be handled in cell, so septic tank is still built, multiple processing Pond can occupy biggish space, and in addition septic tank and blast pool can more or less generate foul smell, influence cell environment health.
Chinese patent 104291520A discloses a kind of sanitary sewage disposal and reuse method, and sanitary sewage is carried out classification row It puts, the Heisui River of high concentration and the buck of low concentration is divided into according to the difference of sewage property and source, after Heisui River is discharged from, is passed sequentially through Anaerobic treatment pool, aeration contact-oxidation pool, the high resistant ecological pool of aeration, the low resistant ecological pool of aeration and ecological precipitation process pond, Treated enters conditioning tank after Heisui River merges with buck, and the processing of underground percolating device, the ground are sent into after conditioning tank is adjusted The water of lower percolating device processing is back to after disinfection flushes the toilet or qualified discharge.This method is also required to Heisui River in cell It is handled, the Heisui River then handled obtains middle water after mixing progress secondary treatment with buck again, and middle water can be used to rinse Lavatory, although Heisui River and buck separately discharge, Heisui River is directly handled in cell, and treated, and Heisui River is mixed with buck again Secondary treatment again treatment process and equipment cost increase to be not appropriate for promoting.
Chinese patent 109110963A discloses a kind of kitchen and bath's sewage water treatment method, includes the following steps: 1) to arrange kitchen Sewage out, is filtered immediately after the exit, realizes the separation of solid and liquid;2) for separation after liquid sewage, according to By oil and water difference of specific gravity, water-oil separating is realized by liquid level overflow;3) to toilet discharge sewage, after the exit immediately into Row disinfection, is then filtered, and carries out the separation of solid and liquid;4) step 2) is carried out by oil, water waste water obtained after separation Then disinfection treatment converges by the sewage being separated by solid-liquid separation with step 3), and carries out further filtration treatment;5) step 4) is passed through Waste water after crossing further filtration treatment, after carrying out advanced treating, qualified discharge or reuse.Although the program is dirty by kitchen and bath Water is separately handled, but its by Heisui River sewage and solid portion solid-liquid separation treatment is carried out directly in cell is unrealistic , secondly, the sewage in Heisui River is also required to be handled in cell, finally, the program will be direct after all sewage treatments It is discharged, the effect of saving is not achieved.
Summary of the invention
Do not need to handle Heisui River in cell the purpose of the present invention is to provide one kind, only need to lower cost and compared with Housing estate wastewater processing method simple device processing buck and recycled.
To reach above-mentioned purpose, a kind of municipal wastewater processing method of the present invention, by the draining of each family life closestool, washing Draining, kitchen drainage are discharged with independent sewer pipe respectively, in which:
1), closestool draining is uniformly discharged into independence after being set to the micromill of each residential quarters user and intercepting grid The municipal Heisui River pipe network of setting, the usage on black water factory for being transported to concentration through multistage delivery pump carry out extensive use of chemical fertilizer processing;
2), washing draining is filtered after this residential quarters is concentrated, forms water in primary after disinfection and sterilization, and primary middle water is passed through pump It is sent in the primary middle water tank of this residential quarters roof, is supplied water by pipeline to the closestool of each household, which can also do To rinse road surface water;
3), kitchen drainage is filtered after this residential quarters is concentrated, precipitates mud, is passed through under conditions of flow velocity < 0.005m/s Oil strain and biomembrane oil strain are adsorbed, no grease is obtained, will be accessed without this residential quarters of grease in washing drainpipe and carry out the 2) step Processing;
4), second step generate primary middle water through biological removal of nitrogen, dephosphorization, disinfection and sterilization, PH adjust, active carbon filter to be formed it is secondary Middle water is directly used in this residential quarters slurry;
5), secondary middle water and tap water are formed straight after PP cotton, active carbon, UFO ultrafiltration membrane, reverse osmosis (RO) film, active carbon processing Drinking-water can cross stainless steel pipes and be transported in each user family in this residential quarters.
After above scheme, since Heisui River (closestool discharge sewage) is not needed through cell septic tank or Heisui River no longer Handled in cell, remaining urban life buck only has a small amount of silt, and existing cleaning product mostly use it is low-phosphorous Formula, so only handle less pollution buck, greatly reduce the equipment requirement and technology difficulty of sewage treatment;In addition it removes Outside the direct emission of Heisui River, other drainings are secondary or utilize three times, and Heisui River, which can recycle, makees fertilizer, so fully achieving Zero-emission;Again, only Heisui River accounts for the 1/3 of Water usage, cook and drink point ratio it is smaller, it is possible to save use Water nearly 2/3 presses whole nation You2.5Yi Hu urban households, and by water-saving 10,000,000,000 tons or more, this will mitigate to ground water significantly within 1 year Exploitation, also pressure force-summing device lesser to water factory and water supply line and capital investment.
Detailed description of the invention
Fig. 1 is flow diagram of the present invention.
Specific embodiment
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment And attached drawing is cooperated to be explained in detail.
Referring to Fig. 1, housing estate wastewater processing method of the present invention, closestool draining, washing draining, kitchen drainage are distinguished It is discharged with independent sewer pipe, is respectively provided with independent closestool water discharge spout road, all closestool water rows in each resident It puts pipeline and accesses unified municipal Heisui River pipe network.Micromill is arranged in the closestool water discharge spout road of each household will be in closestool water Solids smash, to prevent pulverizer damage from the fixture leaked through being made to block pipeline, set in the closestool water discharge spout road of each household There is interception grid, entire pipe network will not in this way blocked, is transported to collection through multistage delivery pump into the Heisui River of municipal Heisui River pipe network In usage on black water factory carry out extensive use of chemical fertilizer processing.
Due to urban life relative clean, and existing cleaning product is more low-phosphorous, more ring what, so wash water is opposite Cleaning, the washing draining of cell form water in primary after being filtered (silt, hair, other solids), disinfection and sterilization after concentrating, The boosted pump promotion of water is sent in the primary middle water tank of roof in primary, is supplied water by pipeline to the closestool of each household, daily life Middle buck and kitchen water consumption are significantly larger than closestool water consumption, so closestool is no longer needed from running water pipe water receiving, extra one Secondary middle water can also road surface etc. is lower to water quality requirement to use water as rinsing.Since the water source of primary middle water is more clean Cell buck does not reprocess Heisui River, and primary middle water is used only to rinse closestool or road surface, it is desirable that lower, it is possible to most Row is handled when simple technique and equipment, is greatly reduced cost, is not also needed too big space.
Kitchen drainage is filtered after concentrating, precipitates mud, passes through absorption oil strain and life under conditions of flow velocity < 0.005m/s Object membrane filtration oil, obtains no grease, the relatively smaller mud of the dish even clean vegetables of present cell life, the oil content in kitchen drainage also compared with It is low, so filtering is deoiled namely is easily realized.It will be accessed without grease in washing drainpipe and carry out water in primary together with washing draining Processing.The Heisui River for having handled about 1/3 less in the treatment process of primary middle water is measured, so the amount of water is about that water applies flexibly water in primary 2/3.
Water applies flexibly the 1/3 of water less than water for rushing closestool or washing the outer residue of road sections in primary, this part once in water It is adjusted by biological removal of nitrogen, dephosphorization, disinfection and sterilization, PH, active carbon filters and to form secondary middle water and be directly used in slurry, this mistake Journey mainly by membrane technology handle, mainly using hollow-fibre membrane (in this technique use 8 Φ 200 hollow-fibre membrane, into Water flow maintains 12 m3/h, and water outlet maintains 10 m3/h or so, backwash per hour 10 minutes, protects hollow-fibre membrane), with The water designed afterwards in design early period will will not be such that film blocks, keep the normal operation of system in this way by very fine filtering. Its operating pressure is 0.1-0.3MPa, and activated carbon adsorption passes through activated carbon adsorption by the water that film comes out, and deodorizing is de-tasted and can also be inhaled (1 kilogram of active carbon handles water 8-12 to colloidal substance in attached water if activated carbon adsorption system is preposition before membranous system Ton, the service life of active carbon can be very short, replaces active carbon quickly, and its postposition is then preposition 20 times or so, improves active carbon Service life, 1 kilogram of active carbon of active carbon postposition dechlorination handle 30 tons of water or so) this process activity canister is designed as daily Backwash is primary, and 10 minutes every time, tank design was Φ 1600, and effective height 2000, clear height 2800, practical loadings are 75%. Since this part only handles the cleaner primary middle water less than domestic consumption 1/3, thus the requirement of the treating capacity of equipment and Technical difficulty requires to substantially reduce, and is suitble to the inexpensive demand of residence district.
To part higher gears cell, water process three times can be carried out again so that on the basis of secondary middle water (tap water can be filled into) and connect Direct drinking is obtained, through stainless steel pipeline into user family, water process surpasses water through PP cotton, active carbon, UFO three times Direct drinking is formed after filter membrane, reverse osmosis (RO) film, active carbon processing.
All water treatment technologies are all made of existing public technology, the not reinflated explanation in this place in the present invention.
Compared with prior art, the present invention no longer maximum Heisui River of processing difficulty in residence district, while reducing 1/3 Usage on black water amount, as long as a simplest technology of sewerage disposing can be realized, secondary sewerage disposing amount be less than daily life The cleaner primary middle water of water 1/3 is applied flexibly, thus it is all lower to processing setting standard requirements and treating capacity requirement, lower It can be realized under cost.All sewage of the present invention can recycle, and the usage amount of complete hoop structure, tap water also subtracts It is few to original 1/3, therefore low cost of the invention, zero-emission, the scheme of more piece about are worthy to be popularized.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (1)

1. a kind of municipal wastewater processing method uses the draining of each household water closestool, washing draining, kitchen drainage respectively Independent sewer pipe is discharged, it is characterised in that:
1), closestool draining is uniformly discharged into independence after being set to the micromill of each residential quarters user and intercepting grid The municipal Heisui River pipe network of setting, the usage on black water factory for being transported to concentration through multistage delivery pump carry out extensive use of chemical fertilizer processing;
2), washing draining is filtered after this residential quarters is concentrated, forms water in primary after disinfection and sterilization, and primary middle water is passed through pump It is sent in the primary middle water tank of residential quarters cell roof, is supplied water by pipeline to the closestool of each household, water can also be with during this is primary As flushing road surface water;
3), kitchen drainage is filtered after residential quarters are concentrated, precipitates mud, passes through suction under conditions of flow velocity < 0.005m/s Attached oil strain and biomembrane oil strain, obtain no grease, will be accessed in washing drainpipe without grease and carry out 2) step processing;
4), second step generate primary middle water through biological removal of nitrogen, dephosphorization, disinfection and sterilization, PH adjust, active carbon filter to be formed it is secondary Middle water is directly used in this residential quarters slurry;
5), secondary middle water and tap water are formed straight after PP cotton, active carbon, UFO ultrafiltration membrane, reverse osmosis (RO) film, active carbon processing Drinking-water, is transported in each user family by stainless steel pipes.
CN201910248061.2A 2019-03-29 2019-03-29 A kind of municipal wastewater processing method Pending CN110078296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910248061.2A CN110078296A (en) 2019-03-29 2019-03-29 A kind of municipal wastewater processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910248061.2A CN110078296A (en) 2019-03-29 2019-03-29 A kind of municipal wastewater processing method

Publications (1)

Publication Number Publication Date
CN110078296A true CN110078296A (en) 2019-08-02

Family

ID=67413898

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910248061.2A Pending CN110078296A (en) 2019-03-29 2019-03-29 A kind of municipal wastewater processing method

Country Status (1)

Country Link
CN (1) CN110078296A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113553679A (en) * 2021-06-17 2021-10-26 义乌市城市规划设计研究院有限公司 Drainage design method based on 3D rule

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240711A (en) * 1993-02-19 1994-08-30 Toto Ltd Intermediate water disposal system
CN1458071A (en) * 2003-06-05 2003-11-26 朱明华 Circular purifier for household life waste water
CN104402075A (en) * 2014-12-15 2015-03-11 郭继会 Economical, efficient, green and circular classification treating method for municipal wastewater
CN204251471U (en) * 2014-11-28 2015-04-08 湖北中天鸿源房地产开发有限责任公司 Diffusion cell, gardens, community waste disposal plant
CN206203987U (en) * 2015-12-23 2017-05-31 万若(北京)环境工程技术有限公司 Not against the independent runoff water recycling treatment system of dispersion of municipal systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240711A (en) * 1993-02-19 1994-08-30 Toto Ltd Intermediate water disposal system
CN1458071A (en) * 2003-06-05 2003-11-26 朱明华 Circular purifier for household life waste water
CN204251471U (en) * 2014-11-28 2015-04-08 湖北中天鸿源房地产开发有限责任公司 Diffusion cell, gardens, community waste disposal plant
CN104402075A (en) * 2014-12-15 2015-03-11 郭继会 Economical, efficient, green and circular classification treating method for municipal wastewater
CN206203987U (en) * 2015-12-23 2017-05-31 万若(北京)环境工程技术有限公司 Not against the independent runoff water recycling treatment system of dispersion of municipal systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张勤等: "《高层建筑给水排水工程(第3版)》", 30 November 2016, 重庆大学出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113553679A (en) * 2021-06-17 2021-10-26 义乌市城市规划设计研究院有限公司 Drainage design method based on 3D rule

Similar Documents

Publication Publication Date Title
CN204939151U (en) One way of life sewage integrated treatment device
CN207877443U (en) A kind of sewage plant blowdown filter device
CN105776769A (en) Regenerating and recycling device for domestic sanitary wastewater and wastewater treatment method thereof
CN110078296A (en) A kind of municipal wastewater processing method
CN102086079A (en) Domestic sewage zero emission treatment method and system
CN109052856A (en) Toilet device for recycling use of domestic sewage
KR101133370B1 (en) Energy-saving type wastewater reclaiming and supplying system
CN205398373U (en) Municipal administration wastewater recovery processing system
CN201665594U (en) Small intelligent water-saving device
CN101811787B (en) Domestic waste water recycling device
JP2010106605A (en) Rainwater utilizing system and rainwater utilizing method
CN209081685U (en) A kind of monkshood factory processing waste water processing unit
CN208471700U (en) A kind of sewage treatment unit
CN206873540U (en) Household water economizer
CN111362508A (en) Quality-based synergistic in-situ sewage treatment method and process
CN205295083U (en) Sewage treatment plant&#39;s sewage treatment upgrading system
CN103449683B (en) Treatment equipment of domestic sewage
CN205575868U (en) Processing system that well water recovery was recycled
JP4017331B2 (en) Septic tank
CN2934385Y (en) Household reclaimed water device
CN209493446U (en) A kind of small towns village domestic sewage processing system
CN109384329A (en) A kind of sewage treatment primary filter and its operating method
CN208776538U (en) A kind of domestic sewage processing system
JP2001239288A (en) Combined sewage treatment tank
JP4381557B2 (en) Merger processing equipment

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
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20190802

WD01 Invention patent application deemed withdrawn after publication