CN111138026A - Oil field wastewater treatment method based on environmental protection - Google Patents
Oil field wastewater treatment method based on environmental protection Download PDFInfo
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- CN111138026A CN111138026A CN201911286187.5A CN201911286187A CN111138026A CN 111138026 A CN111138026 A CN 111138026A CN 201911286187 A CN201911286187 A CN 201911286187A CN 111138026 A CN111138026 A CN 111138026A
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- wastewater
- activated carbon
- pollutants
- water
- oil field
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 16
- 230000007613 environmental effect Effects 0.000 title claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000002351 wastewater Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 231100000719 pollutant Toxicity 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 17
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005273 aeration Methods 0.000 claims abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 230000003197 catalytic effect Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 7
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims abstract description 7
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 238000006385 ozonation reaction Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 30
- 230000010355 oscillation Effects 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 8
- 238000000605 extraction Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005345 coagulation Methods 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 abstract description 2
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- 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
- C02F3/28—Anaerobic digestion 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)
- Physical Water Treatments (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides an oil field wastewater treatment method based on environmental protection, which is characterized in that activated carbon and ferric trichloride or activated carbon and ferric sulfate are added into wastewater and are uniformly stirred; and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction: wastewater in the mechanical grid flows into a regulating reservoir to be stirred and is subjected to pre-aeration treatment to discharge oxygen in the water, and the water is discharged into an anaerobic reaction tank to be kept stand for a period of time; adding a mixed flocculant into the oil field wastewater, and standing for a period of time; adding active carbon for adsorption, and filtering the condensed solid; measuring the content of pollutants in water; and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard. Compared with the oil extraction wastewater treated by the physical and chemical method in the prior art, the biodegradability is improved. The method improves the cohesiveness of pollutants and is beneficial to the subsequent coagulation treatment. The invention obviously improves the treatment efficiency, and shortens the hydraulic retention time from several days to about 10-20 minutes.
Description
Technical Field
The invention belongs to the technical field of paint preparation, and particularly relates to an oil field wastewater treatment method based on environmental protection.
Background
The waste water from oil field drilling contains organic polymer drilling fluid additive with different purposes and small amount of petroleum and other components. Generally, although petroleum can be removed relatively effectively by biological treatment using domesticated microorganisms, artificially added organic polymer drilling fluid additives are difficult to biodegrade due to their complex molecular weight components. At present, the oil field wastewater is generally divided into two categories in China: one is "oil field wastewater" containing methanol, and the other is "oil field wastewater" containing no methanol. The domestic method for treating the methanol-free oil field wastewater at present comprises the following steps: the 'oil field wastewater' is reinjected into the stratum, but the 'oil field wastewater' of the method needs higher cost when being reinjected into the stratum, serious environmental pollution hidden danger can be generated after the 'oil field wastewater' is reinjected into the stratum, the 'oil field wastewater' dispersed at all places of an oil field needs to be concentrated to a designated reinjection place before reinjection, the cost for transporting the 'oil field wastewater' is higher, and useful substances in the 'oil field wastewater' cannot be recycled. Mainly adds some chemical agent to do chemical destabilization and flocculation treatment, then does mechanical solid-liquid separation. Although the method plays a certain role in the treatment of the waste oil from the oil field drilling, the method has the defects of high manufacturing cost, complex operation, difficult standard discharge of the treated waste water and the like.
Disclosure of Invention
The invention aims to provide an oil field wastewater treatment method based on environmental protection, and solves the problem that the existing oil field wastewater treatment method in the prior art is difficult to reach the discharge standard.
The technical scheme adopted by the invention is as follows: an oil field wastewater treatment method based on environmental protection comprises the following specific steps:
step 1: introducing the wastewater into a treatment tank;
step 2: adding activated carbon and ferric trichloride or activated carbon and ferric sulfate into the wastewater, and uniformly stirring;
and step 3: and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction:
and step 3: the wastewater in the mechanical grid flows into a regulating tank for stirring and pre-aeration treatment
And 4, step 4: discharging oxygen in the water, and discharging the water into an anaerobic reaction tank to stand for a period of time;
and 5: adding a mixed flocculant into the oil field wastewater, and standing for a period of time;
step 6: adding active carbon for adsorption, and filtering the condensed solid;
and 7: measuring the content of pollutants in water;
and 8: and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard.
And stirring by adopting ultrasonic oscillation in the uniform stirring process.
The filtration process adopts a filtration device with the aperture of 2 mu m for filtration.
The stirring time in the step 2 is 30 min.
The amount of activated carbon added in step 6 was 5 g/l of wastewater.
The activated carbon in the step 6 is 60-mesh powdered activated carbon.
The invention has the beneficial effects that:
the embodiment of the invention provides an oil field wastewater environment-friendly treatment method, which can effectively solve the problem of environmental pollution caused by oil field wastewater, can effectively recycle gas production auxiliary agents and useful substances in the oil field wastewater, can greatly reduce the cost and energy consumption of recycling the contained gas production auxiliary agents and useful substances from the oil field wastewater, and can greatly reduce the transportation amount and transportation cost, treatment energy consumption and cost of the oil field wastewater; the method has the advantages and characteristics of easy implementation, safety, reliability, wide application, easy popularization and the like; the economic benefit and the environmental protection benefit are obvious.
Detailed Description
The invention is further described with reference to specific embodiments.
An oil field wastewater treatment method based on environmental protection comprises the following specific steps:
step 1: introducing the wastewater into a treatment tank;
step 2: adding activated carbon and ferric trichloride or activated carbon and ferric sulfate into the wastewater, and uniformly stirring;
and step 3: and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction:
and step 3: the wastewater in the mechanical grid flows into a regulating tank for stirring and pre-aeration treatment
And 4, step 4: discharging oxygen in the water, and discharging the water into an anaerobic reaction tank to stand for a period of time;
and 5: adding a mixed flocculant into the oil field wastewater, and standing for a period of time;
step 6: adding active carbon for adsorption, and filtering the condensed solid;
and 7: measuring the content of pollutants in water;
and 8: and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard.
And stirring by adopting ultrasonic oscillation in the uniform stirring process.
The filtration process adopts a filtration device with the pore diameter of 10 μm for filtration.
The stirring time in the step 2 is 30 min.
The amount of activated carbon added in step 6 was 5 g/l of wastewater.
The activated carbon in the step 6 is 60-mesh powdered activated carbon.
Example 1
An oil field wastewater treatment method based on environmental protection comprises the following specific steps:
step 1: introducing the wastewater into a treatment tank;
step 2: adding activated carbon and ferric trichloride or activated carbon and ferric sulfate into the wastewater, and uniformly stirring;
and step 3: and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction:
and step 3: the wastewater in the mechanical grid flows into a regulating tank for stirring and pre-aeration treatment
And 4, step 4: discharging oxygen in the water, and discharging the water into an anaerobic reaction tank to stand for a period of time;
and 5: adding a mixed flocculant into the oil field wastewater, and standing for a period of time;
step 6: adding active carbon for adsorption, and filtering the condensed solid;
and 7: measuring the content of pollutants in water;
and 8: and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard.
And stirring by adopting ultrasonic oscillation in the uniform stirring process.
The filtration process adopts a filtration device with the aperture of 2 mu m for filtration.
The stirring time in the step 2 is 30 min.
The amount of activated carbon added in step 6 was 5 g/l of wastewater.
The activated carbon in the step 6 is 60-mesh powdered activated carbon.
Example 2
An oil field wastewater treatment method based on environmental protection comprises the following specific steps:
step 1: introducing the wastewater into a treatment tank;
step 2: adding activated carbon and ferric trichloride or activated carbon and ferric sulfate into the wastewater, and uniformly stirring;
and step 3: and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction:
and step 3: the wastewater in the mechanical grid flows into a regulating tank for stirring and pre-aeration treatment
And 4, step 4: discharging oxygen in the water, and discharging the water into an anaerobic reaction tank to stand for a period of time;
and 5: adding a mixed flocculant into the oil field wastewater, and standing for a period of time;
step 6: adding active carbon for adsorption, and filtering the condensed solid;
and 7: measuring the content of pollutants in water;
and 8: and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard.
And stirring by adopting ultrasonic oscillation in the uniform stirring process.
The filtration process adopts a filtration device with the aperture of 6 μm for filtration.
The stirring time in the step 2 is 30 min.
The amount of activated carbon added in step 6 was 10 g/l of wastewater.
The activated carbon in the step 6 is 60-mesh powdered activated carbon.
Example 3
An oil field wastewater treatment method based on environmental protection comprises the following specific steps:
step 1: introducing the wastewater into a treatment tank;
step 2: adding activated carbon and ferric trichloride or activated carbon and ferric sulfate into the wastewater, and uniformly stirring;
and step 3: and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction:
and step 3: the wastewater in the mechanical grid flows into a regulating tank for stirring and pre-aeration treatment
And 4, step 4: discharging oxygen in the water, and discharging the water into an anaerobic reaction tank to stand for a period of time;
and 5: adding a mixed flocculant into the oil field wastewater, and standing for a period of time;
step 6: adding active carbon for adsorption, and filtering the condensed solid;
and 7: measuring the content of pollutants in water;
and 8: and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard.
And stirring by adopting ultrasonic oscillation in the uniform stirring process.
The filtration process adopts a filtration device with the aperture of 8 μm for filtration.
The stirring time in the step 2 is 30 min.
The amount of activated carbon added in step 6 was 5 g/l of wastewater.
The activated carbon in the step 6 is 60-mesh powdered activated carbon.
Finally, the treated water is drained back into the underground water again.
The invention belongs to a physical and chemical treatment method, utilizes the synergistic effect of ozone and ultrasonic to oxidize the pollutants which are difficult to be biologically degraded in the oil extraction wastewater, can decompose macromolecular substances in the oil extraction wastewater into substances with smaller molecular weight and become compounds which are relatively easy to degrade, thereby increasing the BOD/COD value of the oil extraction wastewater and improving the biodegradability compared with the oil extraction wastewater treated by the physical and chemical method in the prior art. The method improves the cohesiveness of pollutants and is beneficial to the subsequent coagulation treatment. The invention obviously improves the treatment efficiency, and shortens the hydraulic retention time from several days to about 10-20 minutes.
Additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (6)
1. An oil field wastewater treatment method based on environmental protection is characterized by comprising the following specific steps:
step 1: introducing the wastewater into a treatment tank;
step 2: adding activated carbon and ferric trichloride or activated carbon and ferric sulfate into the wastewater, and uniformly stirring;
and step 3: and (3) introducing ozone into the treatment pool to perform catalytic ozonation reaction:
and step 3: the wastewater in the mechanical grid flows into a regulating tank for stirring and pre-aeration treatment
And 4, step 4: discharging oxygen in the water, and discharging the water into an anaerobic reaction tank to stand for a period of time;
and 5: adding a mixed flocculant into the oil field wastewater, and standing for a period of time;
step 6: adding active carbon for adsorption, and filtering the condensed solid;
and 7: measuring the content of pollutants in water;
and 8: and if the content of the pollutants is lower than the standard, discharging underground water, otherwise, repeating the steps until the pollutants reach the standard.
2. The environmental-friendly oilfield wastewater treatment method according to claim 1, wherein ultrasonic oscillation is adopted for stirring in the stirring process.
3. The environmental-friendly oilfield wastewater treatment method according to claim 1, wherein the filtration process is performed by using a filtration device with a pore size of 2 μm.
4. The environmental-friendly oilfield wastewater treatment method according to claim 1, wherein the stirring time in the middle step 2 is 30 min.
5. The method for treating oilfield wastewater based on environmental protection of claim 1, wherein the activated carbon is added in the amount of 5 g/L wastewater in the step 6.
6. The environmental-friendly oilfield wastewater treatment method according to claim 1, wherein the activated carbon in the step 6 is 60-mesh powdered activated carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286187.5A CN111138026A (en) | 2019-12-13 | 2019-12-13 | Oil field wastewater treatment method based on environmental protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286187.5A CN111138026A (en) | 2019-12-13 | 2019-12-13 | Oil field wastewater treatment method based on environmental protection |
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| Publication Number | Publication Date |
|---|---|
| CN111138026A true CN111138026A (en) | 2020-05-12 |
Family
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| CN201911286187.5A Pending CN111138026A (en) | 2019-12-13 | 2019-12-13 | Oil field wastewater treatment method based on environmental protection |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429781A (en) * | 2001-12-30 | 2003-07-16 | 中国科学院沈阳应用生态研究所 | Oil extraction waste water treatment method and its special reaction equipment |
| CN101113048A (en) * | 2006-07-27 | 2008-01-30 | 上海中油企业集团有限公司 | Oil field wastewater treatment method |
| CN102030435A (en) * | 2009-09-30 | 2011-04-27 | 北京中科国益环保工程有限公司 | Method for treating oil field drilling waste water |
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| EP2657198A1 (en) * | 2010-12-24 | 2013-10-30 | Boying Xiamen Science And Technology Co., Ltd. | Printing and dyeing wastewater treatment and reuse apparatus and method therefor |
| CN203683276U (en) * | 2013-12-25 | 2014-07-02 | 天津生态城环保有限公司 | High salt content refractory oil exploitation wastewater treatment system |
| CN110451717A (en) * | 2019-07-24 | 2019-11-15 | 张雷 | Oily wastewater outlet treatment process and device |
-
2019
- 2019-12-13 CN CN201911286187.5A patent/CN111138026A/en active Pending
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|---|---|---|---|---|
| CN1429781A (en) * | 2001-12-30 | 2003-07-16 | 中国科学院沈阳应用生态研究所 | Oil extraction waste water treatment method and its special reaction equipment |
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| EP2657198A1 (en) * | 2010-12-24 | 2013-10-30 | Boying Xiamen Science And Technology Co., Ltd. | Printing and dyeing wastewater treatment and reuse apparatus and method therefor |
| CN102674528A (en) * | 2012-05-28 | 2012-09-19 | 中国石油天然气股份有限公司 | Treatment method of low-concentration methanol wastewater by ultrasonic and ozone |
| CN203683276U (en) * | 2013-12-25 | 2014-07-02 | 天津生态城环保有限公司 | High salt content refractory oil exploitation wastewater treatment system |
| CN110451717A (en) * | 2019-07-24 | 2019-11-15 | 张雷 | Oily wastewater outlet treatment process and device |
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| Title |
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Application publication date: 20200512 |