CN113548767A - Method and system for resource utilization of waste cutting emulsion and sewage cooperative treatment - Google Patents
Method and system for resource utilization of waste cutting emulsion and sewage cooperative treatment Download PDFInfo
- Publication number
- CN113548767A CN113548767A CN202110738168.2A CN202110738168A CN113548767A CN 113548767 A CN113548767 A CN 113548767A CN 202110738168 A CN202110738168 A CN 202110738168A CN 113548767 A CN113548767 A CN 113548767A
- Authority
- CN
- China
- Prior art keywords
- sewage
- treatment
- waste cutting
- cutting emulsion
- demulsification
- 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 51
- 239000002699 waste material Substances 0.000 title claims abstract description 48
- 239000000839 emulsion Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000004519 grease Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000002425 crystallisation Methods 0.000 claims description 16
- 239000012528 membrane Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000009615 deamination Effects 0.000 claims description 8
- 238000006481 deamination reaction Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 8
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 2
- 239000002920 hazardous waste Substances 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000013556 antirust agent Substances 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003403 water pollutant Substances 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5209—Regulation methods for flocculation or precipitation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a novel method and a system for resource utilization of waste cutting emulsion and sewage cooperative treatment, which can realize resource utilization after demulsification, separation and sewage treatment of the waste cutting emulsion serving as a hazardous waste. The method and the system can change the traditional treatment mode of the waste cutting emulsion at present, and can transform dangerous waste into industrial sewage for cooperative treatment after efficient demulsification and oil separation; the separated grease can be subjected to blending burning or regenerated and used after further processing, so that the resource utilization target is realized; meanwhile, the treatment cost can be obviously reduced, and obvious environmental benefit and economic benefit are created for enterprises.
Description
Technical Field
The invention relates to the technical field of hazardous waste treatment and industrial wastewater treatment, in particular to a method and a system for resource utilization of waste cutting emulsion and sewage synergistic treatment.
Background
Waste cutting emulsion is a common waste produced by manufacturing enterprises and is listed in national hazardous waste catalogue HW09 for disposal. The waste cutting emulsion comprises the main components of mineral oil, an emulsifier, an antirust agent and the like, and also comprises partial nitrite, the oil content is about 5 percent, the appearance is milky white, and the water quality index range is COD: 10 to 20x104mg/L, ammonia nitrogen: 1000-2000 mg/L, TP: 50-100 mg/L.
The main current treatment methods are the following two types: 1. intensively sending the waste to a hazardous waste disposal center for materialization and incineration treatment, wherein the treatment cost is 3000-6000 yuan/ton. 2. The manufacturing enterprise adopts vacuum evaporation to process, and sends about 20% concentrate produced to the useless center of disposing of danger again, has realized minimizing, but has also increased the energy consumption.
In order to realize the aim of resource utilization of the waste cutting emulsion, the characteristics of the waste cutting emulsion need to be analyzed, and a high-efficiency demulsifier is selected and matched so as to achieve the aims of ideal demulsification and separation, resource recovery of grease and filter residue, and recycling of separated water after treatment.
Disclosure of Invention
Aiming at the current situation that the waste cutting emulsion cannot realize resource utilization at present, the invention aims to provide a resource utilization method and system for the cooperative treatment of the waste cutting emulsion and sewage, so that the oil can be recycled and the sewage can be discharged or recycled after reaching the standard.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a resource utilization method for cooperative treatment of waste cutting emulsion and sewage comprises the following steps:
demulsifying: mixing a high-efficiency demulsifier with waste cutting emulsion, and demulsifying the waste cutting emulsion to obtain immiscible grease and solution;
separation-crystallization step: separating the grease and the solution obtained in the demulsification step to obtain the grease and the solution in a separated state, filtering the solution, and separating out solute in the solution in the form of crystals to obtain filtered sewage and filter residue;
the sewage treatment step: and mixing and adjusting, pretreating, biochemically treating and deaminating the filtered sewage obtained in the separation-crystallization step and domestic sewage to obtain water which can be discharged or recycled up to the standard.
Further, in the demulsifying step, a high-efficiency demulsifier is selected according to the characteristic analysis of the waste cutting emulsion, and the volume consumption of the high-efficiency demulsifier is 2%.
Further, the demulsifying step comprises a process flow of mixing the high-efficiency demulsifier with the waste cutting emulsion, heating and stirring the mixed solution, and then standing, wherein the stirring time is 20 minutes.
Further, the separated grease is stored and specially recovered in the separation-crystallization step; the solution was filtered through baud ultrafine crystals.
Further, the sewage treatment step comprises the process flows of mixing and adjusting the filtered sewage and other domestic sewage to form a mixed solution, and carrying out Fenton treatment, upflow anaerobic sludge blanket UASB treatment, MBR membrane bioreactor integrated equipment treatment and deamination nitrogen membrane treatment on the mixed solution.
A system for the resource utilization of waste cutting emulsion and sewage cooperative treatment comprises the following devices: a demulsification unit, a separation-crystallization unit and a sewage treatment unit.
Furthermore, the demulsification unit comprises a demulsification tank, and a high-efficiency demulsification agent inlet, a waste cutting emulsion inlet, a grease outlet and a solution outlet are arranged on the demulsification tank.
Further, the separation-crystallization unit comprises a grease recovery tank, a filtering tank and a filter residue tank.
Further, the sewage treatment unit comprises a Fenton-upflow anaerobic sludge blanket UASB pretreatment system, MBR membrane bioreactor integrated equipment, a dosing system, an air compression system and a deamination nitrogen membrane.
The method and the system have the advantages that the method and the system can achieve the following effects: ideal demulsification separation, resource recovery of oil and filter residue, and reuse of separated water after treatment.
Drawings
Fig. 1 is a schematic structural diagram of a process flow and a system of a new method for resource utilization of waste cutting emulsion and sewage synergistic treatment in the embodiment of the invention.
In the figure:
1. a demulsification tank; 2. waste cutting emulsion; 3. a high-efficiency demulsifier; 4. a grease recovery tank; 5. a filter tank; 6. a slag filtering groove; 7. a Fenton-upflow anaerobic sludge blanket UASB pretreatment system; 8. MBR membrane bioreactor integrated equipment; 9. a dosing system; 10. an air compression system; 11. and (4) a deamination nitrogen film.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
As shown in figure 1, the invention discloses a resource utilization method for the cooperative treatment of waste cutting emulsion and sewage, which comprises the following steps: demulsifying: mixing a high-efficiency demulsifier with waste cutting emulsion, and demulsifying the waste cutting emulsion to obtain immiscible grease and solution; separation-crystallization step: separating the grease and the solution obtained in the demulsification step to obtain the grease and the solution in a separated state, filtering the solution, and separating out solute in the solution in the form of crystals to obtain filtered sewage and filter residue; the sewage treatment step: and mixing and adjusting, pretreating, biochemically treating and deaminating the filtered sewage obtained in the separation-crystallization step and domestic sewage to obtain water which can be discharged or recycled up to the standard.
In this embodiment, a high-efficiency demulsifier is selected according to the characteristic analysis of the waste cutting emulsion, and the volume usage of the high-efficiency demulsifier is 2%. The demulsification step comprises a process flow of mixing the high-efficiency demulsifier with the waste cutting emulsion, heating and stirring the mixed solution, and then standing, wherein the stirring time is 20 minutes. In the separation-crystallization step, the separated grease is stored and specially recovered; the solution was filtered through baud ultrafine crystals. The sewage treatment step comprises the steps of mixing and adjusting the filtered sewage and other domestic sewage to form a mixed solution, and carrying out the processes of Fenton treatment, upflow anaerobic sludge blanket UASB treatment, MBR membrane bioreactor integrated equipment treatment and deamination nitrogen membrane treatment on the mixed solution.
The invention also discloses a system for the cooperative treatment and resource utilization of the waste cutting emulsion and the sewage, which comprises the following devices: a demulsification unit, a separation-crystallization unit and a sewage treatment unit. The demulsification unit comprises a demulsification tank, and a high-efficiency demulsification agent inlet, a waste cutting emulsion inlet, a grease outlet and a solution outlet are arranged on the demulsification tank. The separation-crystallization unit comprises a grease recovery tank, a filtering tank and a filter residue tank. The sewage treatment unit comprises a Fenton-upflow anaerobic sludge blanket UASB pretreatment system, MBR membrane bioreactor integrated equipment, a dosing system, an air compression system and a deamination nitrogen membrane.
In this embodiment, as shown in fig. 1, the waste cutting emulsion 2 and the high-efficiency demulsifier 3 are added into the demulsification tank 1, the volume mixing amount of the high-efficiency demulsifier 3 is about 2%, the pH value in the demulsification tank 1 is adjusted to about 1-2, the waste cutting emulsion is heated at 35-40 ℃, stirred for 20 minutes, and then kept stand, the upper layer of grease is separated to the grease recovery tank 4, the lower layer of water is discharged into the filter tank 5, the filter residue is separated to the filter residue tank 6, the filtered water enters the MBR integrated equipment 8 after passing through the Fenton-upflow anaerobic sludge bed UASB pretreatment system 7, the drug adding system 9 and the air compression system 10 are operated at the same time, and finally, the water can be discharged or recycled after reaching the standard of the first-level A through the deamination nitrogen membrane 11.
Specific application examples are as follows:
the treatment object is waste cutting emulsion of a certain mechanical manufacturing enterprise in the development area of Jizhuang of Beijing city, the oil content is 4.8 percent, the COD is 130000mg/L, the ammonia nitrogen is 1090mg/L, and the TP is 70 mg/L. When the device is used for treatment, the recovered grease can be used as base oil of regenerated lubricating oil, and the discharged water meets the requirements of first class A in the Water pollutant Integrated discharge Standard.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (10)
1. A resource utilization method for the cooperative treatment of waste cutting emulsion and sewage is characterized by comprising the following steps:
demulsifying: mixing a high-efficiency demulsifier with waste cutting emulsion, and demulsifying the waste cutting emulsion to obtain immiscible grease and solution;
separation-crystallization step: separating the grease and the solution obtained in the demulsification step to obtain the grease and the solution in a separated state, filtering the solution, and separating out solute in the solution in the form of crystals to obtain filtered sewage and filter residue;
the sewage treatment step: and mixing and adjusting, pretreating, biochemically treating and deaminating the filtered sewage obtained in the separation-crystallization step and domestic sewage to obtain water which can be discharged or recycled up to the standard.
2. The method for recycling waste cutting emulsion and sewage through cooperative treatment as claimed in claim 1, wherein the method comprises the following steps: in the demulsifying step, the high-efficiency demulsifier is selected and prepared according to the characteristic analysis of the waste cutting emulsion, and the volume consumption is 2%.
3. The method for recycling waste cutting emulsion and sewage through cooperative treatment as claimed in claim 1, wherein the method comprises the following steps: the demulsification step comprises the process flows of mixing, heating, stirring and standing the high-efficiency demulsifier and the waste cutting emulsion, wherein the stirring time is 20 minutes.
4. The method for recycling waste cutting emulsion and sewage through cooperative treatment as claimed in claim 1, wherein the method comprises the following steps: the separation-crystallization step comprises storage and specific recovery of the separated grease; the solution was filtered through baud ultrafine crystals.
5. The method for recycling waste cutting emulsion and sewage in cooperative treatment as claimed in any one of claims 1 to 4, wherein: the sewage treatment step comprises the steps of mixing and adjusting the filtered sewage and other domestic sewage to form a mixed solution, and carrying out the processes of Fenton treatment, upflow anaerobic sludge blanket UASB treatment, MBR membrane bioreactor treatment and deamination nitrogen membrane treatment on the mixed solution.
6. The utility model provides a system for useless cutting emulsion and sewage coprocessing resource utilization which characterized in that: the device comprises the following devices: a demulsification unit, a separation-crystallization unit and a sewage treatment unit.
7. The system for the cooperative treatment and resource utilization of the waste cutting emulsion and the sewage as claimed in claim 6, wherein: the demulsification unit comprises a demulsification tank (1), wherein the demulsification tank (1) is provided with a high-efficiency demulsification agent (3) inlet, a waste cutting emulsion (2) inlet, an oil outlet and a solution outlet.
8. The system for the cooperative treatment and resource utilization of the waste cutting emulsion and the sewage as claimed in claim 6, wherein: the separation-crystallization unit comprises a grease recovery tank (4) and a filtering tank (5) and a slag filtering groove (6).
9. The system for the cooperative treatment and resource utilization of the waste cutting emulsion and the sewage as claimed in claim 6, wherein: the sewage treatment unit comprises a Fenton-upflow anaerobic sludge blanket UASB pretreatment system (7), MBR membrane bioreactor integrated equipment (8), a dosing system (9), an air compression system (10) and a deamination nitrogen membrane (11).
10. The system for the cooperative treatment and resource utilization of the waste cutting emulsion and the sewage as claimed in claim 6, wherein: the system comprises a single or multiple demulsification units, separation-crystallization units, sewage treatment units as claimed in claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110738168.2A CN113548767A (en) | 2021-06-30 | 2021-06-30 | Method and system for resource utilization of waste cutting emulsion and sewage cooperative treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110738168.2A CN113548767A (en) | 2021-06-30 | 2021-06-30 | Method and system for resource utilization of waste cutting emulsion and sewage cooperative treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113548767A true CN113548767A (en) | 2021-10-26 |
Family
ID=78102616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110738168.2A Pending CN113548767A (en) | 2021-06-30 | 2021-06-30 | Method and system for resource utilization of waste cutting emulsion and sewage cooperative treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113548767A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601774A (en) * | 2017-10-18 | 2018-01-19 | 厦门东江环保科技有限公司 | High-concentration emulsified liquid processing method and processing system |
| CN111003890A (en) * | 2019-12-24 | 2020-04-14 | 惠州Tcl环境科技有限公司 | Method for cooperatively treating high-concentration waste emulsion by using zinc-containing waste liquid |
-
2021
- 2021-06-30 CN CN202110738168.2A patent/CN113548767A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601774A (en) * | 2017-10-18 | 2018-01-19 | 厦门东江环保科技有限公司 | High-concentration emulsified liquid processing method and processing system |
| CN111003890A (en) * | 2019-12-24 | 2020-04-14 | 惠州Tcl环境科技有限公司 | Method for cooperatively treating high-concentration waste emulsion by using zinc-containing waste liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101234836B (en) | Garbage percolate treatment technique | |
| CN102690018B (en) | Method for treating and recycling coal tar processing wastewater | |
| CN101311127B (en) | Method and device for treating a great variety of waste emulsion of high concentration using hyperfiltration membrane method | |
| CN102795746B (en) | Treatment method for waste incineration power plant leachate and device thereof | |
| CN100395191C (en) | Oil-containing dross dehydration process | |
| CN103539325B (en) | Process for treating oil-containing sludge and system | |
| CN111138028A (en) | Automobile production wastewater treatment method and system | |
| CN109437454A (en) | The reinforcing materialization treating method and apparatus of refinery high ammonia special type oily wastewater with high salt | |
| CN104030533B (en) | Wastewater from cassava starch production ABIC-biological contact oxidation process-coagulating treatment group technology | |
| CN105417878A (en) | Filter system applied to pickling sludge leachate treatment | |
| CN205892970U (en) | Oil shale atmospheric pressure splits and returns flowing back processing apparatus | |
| CN109942150A (en) | A kind of waste vegetable oil utilizes the processing method of production waste water | |
| CN203613075U (en) | Wastewater treatment system | |
| CN216303557U (en) | Waste cutting emulsion and sewage cooperative treatment resource utilization system | |
| CN202808539U (en) | Leachate treatment device for garbage incineration power plant | |
| CN113548767A (en) | Method and system for resource utilization of waste cutting emulsion and sewage cooperative treatment | |
| CN202785898U (en) | Device for treating and recycling wastewater from processing of coal tar | |
| CN206751602U (en) | A kind of high concentration dregs of a decoction Leachate site multistage-combination disposal plant | |
| CN114871253A (en) | Kitchen waste leachate treatment system and method | |
| CN212610162U (en) | Resource recycling treatment system for leachate of waste incineration plant | |
| CN212610161U (en) | Full-flow treatment system for leachate of waste incineration plant | |
| CN104030481A (en) | Electrolytic manganese waste water treatment and recycling method and system | |
| CN105439384A (en) | UF membrane filtering system for processing leachate generated in acid washing of sludge | |
| CN101250015B (en) | Method and device for processing ceramic phenolic waste water | |
| CN205347110U (en) | UF membrane filtration system for pickling mud leachate treatment |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100176 9th floor, block T2, Han's Square, yard 2, Ronghua South Road, Yizhuang Economic and Technological Development Zone, Daxing District, Beijing Applicant after: Beijing Beikong Industrial Environmental Technology Co.,Ltd. Address before: 100176 9th floor, block T2, Han's Square, yard 2, Ronghua South Road, Yizhuang Economic and Technological Development Zone, Daxing District, Beijing Applicant before: BEIJING BEIHUA ZHONGQING ENVIRONMENTAL ENGINEERING TECHNOLOGY CO.,LTD. |