CN1206178C - High-concentrated emulsified oil waste water treating method - Google Patents
High-concentrated emulsified oil waste water treating method Download PDFInfo
- Publication number
- CN1206178C CN1206178C CN 02159346 CN02159346A CN1206178C CN 1206178 C CN1206178 C CN 1206178C CN 02159346 CN02159346 CN 02159346 CN 02159346 A CN02159346 A CN 02159346A CN 1206178 C CN1206178 C CN 1206178C
- Authority
- CN
- China
- Prior art keywords
- waste water
- oil
- biochemical
- hour
- hydraulic detention
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention provides a method for treating high-concentration emulsified oil waste water. The present invention comprises sequentially the steps that floating oil in the upper layer is isolated and removed in an oil separation pool, and then waste water is pumped into a regulation pool; suspended oil is removed; the waste water is emulsified, and waste oil and flocculated substances in the upper layer are removed in the mode of air flotation; the waste water is pumped into an electrolytic pool and is electrolyzed, and then waste oil and flocculated substances in the upper layer are removed; the waste water is biologically and chemically treated. Compared with the original treatment methods, the present invention reduces treatment cost, raises treatment effect and shortens treatment time.
Description
Technical field
The present invention relates to a kind of high-concentration emulsified oil wastewater treatment process.
Background technology
For wastewater treatment, must take into account effect, efficient and expense index simultaneously.Also contain a large amount of toxic organic pollutants in the high-concentration emulsified oil wastewater except that the oil in water emulsion that contains high density, COD is up to 5000-20000mg/L, and intractability is very big.High-concentration emulsified oil wastewater treatment process in the past often adopts dosing breakdown of emulsion or electrolysis demulsification and dissolved air flotation upper strata waste oil and throw out, uses activated carbon adsorption again.This method processing costs is high.Be to reduce processing costs, the someone adopts after the pre-treatment method of biochemical treatment again.Though this method reduces processing costs relatively, its pretreatment process is unreasonable, and the biochemical treatment impact load is big, as obtaining preferable effect, its biochemical treatment hydraulic detention time is long, and investment and working cost are still bigger, and causes the biochemical treatment system collapse easily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of effective, efficient is high and expense is low high-concentration emulsified oil wastewater treatment process.For this reason, the present invention is by the following technical solutions: it may further comprise the steps successively:
1), in oil trap, exclude the upper strata oil slick,
2), the waste water that will exclude behind the oil slick of upper strata enters equalizing tank, removes suspension oil afterwards again,
3), will go up waste water breakdown of emulsion and dissolved air flotation upper strata waste oil and throw out after the step process,
4), the waste water that will go up after the step process advances the electrolyzer electrolysis, dissolved air flotation upper strata waste oil and throw out again,
5), the waste water after the step process in the biochemical treatment.
Because adopt above technical scheme, the method for wastewater treatment that the present invention will adopt is at present compared with treatment process in the past by the special sort mode that the contriver invented, reduce processing cost, improve treatment effect, shorten the treatment time.The step 1) processing cost is low, and speed is fast, and surperficial oil slick is removed, and the burden of wastewater treatment after alleviating, its direct effect are to have alleviated the pressure that removes suspension oil, therefore can shorten step 2) in the suspension oil time of removing and prolong the cleaning interval of removing suspension oil equipment.Because therefore the rapid pre-treatment of first two steps, can reduce the injected volume of the emulsion splitter of step 3), not only reduces cost but also can shorten the treatment time.Since before step wastewater treatment and also have the wastewater treatment step afterwards, the step 4) electrolysis treatment can be primarily aimed at the redox of the toxic organic compound in the oil in water emulsion, therefore both can adopt than low power consumption and battery lead plate loss, can bring into play the fast advantage of its processing speed again.Step 5) because therefore the wastewater treatment of step in the past can greatly alleviate the burden of its wastewater treatment, makes and can good waste water treatment effect can avoid the treatment time long again, guarantees the reliable and stable of system works.
Above-mentioned biochemical treatment waste water can may further comprise the steps successively: 1), aerobic biochemical handles waste water, 2), facultative anaerobic biochemical handles waste water, 3), aerobic biochemical handles waste water, 4), settling tank isolating active mud.Can further improve treatment effect like this and shorten the treatment time, being treated to little residence time high loading at first section aerobic biochemical handles, waste water is at this most of organism of degrading, second section facultative anaerobic biochemical handled waste water, degraded part macromolecule organic, improve wastewater biodegradability, and lower the 3rd section intractability raising processing speed.The preferable hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water before the waste water is 1-4 hour; The preferable hydraulic detention time that facultative anaerobic biochemical is handled waste water is 4-8 hour; The preferable hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water behind the waste water is 4-10 hour.
Perhaps, also have the aerobic biochemical that carries out successively between described step " breakdown of emulsion and air supporting " and " electrolysis " and handle waste water and settling tank isolating active mud step, 1), facultative anaerobic biochemical handles waste water abovementioned steps " 5) " may further comprise the steps successively:, 2), aerobic biochemical is handled waste water, 3), settling tank isolating active mud.Like this, most of organism of degrading before electrolysis makes the electrolysis treatment toxic organic compound have more specific aim, can further reduce the expense of electrolysis operation; Simultaneously, the treatment effect that also can improve step " 5) " shortens its treatment time.The preferable hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water before the waste water is 1-4 hour; The preferable hydraulic detention time that facultative anaerobic biochemical is handled waste water is 4-8 hour; The preferable hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water behind the waste water is 4-10 hour.
Described " removing suspension oil " adopts inclined tube oil removing and filter successively.Thisly remove that suspension oil method cost is low, treatment effect stable, easy to maintenance.The pipeline of waste water through being obliquely installed enters filtering basin.Suspension oil in the waste water is adhered to, assembles, rises by the filtrate in tube wall and the filtering basin, removes suspension oil.The perforated tube that the material that it is good that pipeline can adopt lipophilicity makes, filtrate can adopt the good material of lipophilicity.Inclined tube and filter tank one capable of being combined.
Above-mentioned breakdown of emulsion adopts industrial sodium-chlor and lime as emulsion splitter, and the weight ratio of industrial sodium-chlor and lime is 0.8: 5-20, the injected volume 0.05-0.15% that is weight percentage.Like this, can greatly reduce the emulsion splitter use cost.
Described electrolysis is pulse electrolysis, and battery lead plate adopts stainless steel or iron plate, and the pole plate bipolarity is arranged.Like this, can brownout.Iron ion is separated out when selecting iron plate as pole plate for use, produces strong coagulation with emulsifiable oil waste water, can further improve the COD clearance.
Described biochemical treatment employing cloth or blanket or carpet or filter cloth are as filler, and packing specific area is the 20-40 metre squared per cubic.This filler can hang in the wastewater biochemical treating pond one by one with large-area form, also can the particle form be fixed on the carrier, and carrier is hung in the wastewater biochemical treating pond.This filler, with regard to macroscopic view, be planeform, the bodily form of relative microorganism, its surface is the unbroken extremely coarse injustice of concaveconvex shape, therefore have great specific surface area, be beneficial to microorganic adhesion on filler, biofilm speed is very fast on filler, the domestication time is short, and the biochemical treatment ability is strong.Filler of the present invention, its material need not be made especially, can adopt different cloth or blanket or carpet or filter cloth in the same biochemistry pool, and material is provided convenience, selectivity big, can reduce the biochemical treatment cost.
The preferable hydraulic detention time that removes suspension oil is 1-2 hour; To removing waste water breakdown of emulsion and dissolved air flotation upper strata waste oil and this step of throw out behind the suspension oil, the preferable hydraulic detention time of its breakdown of emulsion is 0.2-0.8 hour, and its dissolved air flotation upper strata waste oil and the preferable hydraulic detention time of throw out are 0.3-1.2 hour; Electrolysis and dissolved air flotation upper strata waste oil and this step of throw out, the preferable hydraulic detention time of its electrolyzer is 0.2-0.5 hour, its dissolved air flotation upper strata waste oil and the preferable hydraulic detention time of throw out are 0.3-1.2 hour.
Embodiment
Embodiment 1
It may further comprise the steps the present invention successively:
1), in oil trap, excludes the upper strata oil slick.
High-concentration emulsified oil wastewater advances underground oil trap through grille well, has collecting well in the oil trap, and the oil slick of collecting oil trap send the waste oil groove by fuel pump.Hydraulic detention time in oil trap can be controlled in about 4 hours.
2), the waste water that will exclude behind the oil slick of upper strata enters equalizing tank, removes suspension oil afterwards again.
The oil trap water outlet enters equalizing tank, and waste water homogeneous is therein all measured, and lift pump is promoted to waste water except that the suspension oil facility and removes suspension oil, removes the suspension oil facility and adopts inclined tube and filter tank successively.The perforated tube that inclined tube adopts the good material of lipophilicity to make, filtrate can adopt the good quartz sand of lipophilicity.Hydraulic detention time in the equalizing tank can be controlled in about 6 hours, and the hydraulic detention time that removes in the suspension oil facility can be controlled in 1-2 hour, and present embodiment is 1.5 hours.
3), to waste water breakdown of emulsion and dissolved air flotation upper strata waste oil and throw out after filtering.
The waste water of last step enters breakdown of emulsion pond breakdown of emulsion, adopt industrial sodium-chlor and lime as emulsion splitter, the weight ratio of industry sodium-chlor and lime is 0.8: 5-20, the injected volume 0.05-0.15% that is weight percentage, weight ratio at present embodiment industry sodium-chlor and lime is 0.8: 12, injected volume is weight percentage 0.10%, and the laggard emulsification greasy filth of breakdown of emulsion air supporting machine separates upper strata waste oil and throw out.Preferable hydraulic detention time is 0.2-0.8 hour in the breakdown of emulsion pond, and present embodiment is 0.5 hour, and the preferable hydraulic detention time of air supporting machine is 0.3-1.2 hour, and present embodiment is 0.7 hour.
4), the waste water that will go up after the step process advances the electrolyzer electrolysis, dissolved air flotation upper strata waste oil and throw out again.
Electrolytic process is handled and is adopted pulse electrolysis, battery lead plate adopts stainless steel or iron plate, and the present embodiment battery lead plate adopts stainless steel, and pole plate adopts bipolarity to arrange, bath voltage be 200 volts to 450 volts adjustable, the waste water after the electrolysis enters electrolysis mud air supporting machine and separates upper strata waste oil and throw out.Preferable hydraulic detention time in the electrolyzer is 0.2-0.5 hour, and present embodiment is 0.3 hour, and the preferable hydraulic detention time of air supporting machine is 0.3-1.2 hour, and present embodiment is 0.7 hour.
5), the waste water after the step process in the biochemical treatment.
Biochemical treatment adopts aerobic biochemical processing waste water, facultative anaerobic biochemical processing waste water, aerobic biochemical processing waste water, settling tank isolating active mud to carry out successively, adopt cloth or blanket or carpet or filter cloth as filler, packing specific area is the 20-40 metre squared per cubic, and present embodiment is 30 metre squared per cubic.This filler hangs in the wastewater biochemical treating pond one by one with large-area form, and the filler spacing of suspension is the 40-60 millimeter, and present embodiment is 50 millimeters.The preferable hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water before the waste water is 1-4 hour, and present embodiment is 2.5 hours; The preferable hydraulic detention time that facultative anaerobic biochemical is handled waste water is 4-8 hour, and present embodiment is 6 hours; The preferable hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water behind the waste water is 4-10 hour, and present embodiment is 7 hours.The aerobic process and the oxygen method of holding concurrently are existing usual way, and settling tank isolating active mud is back to the aerobic biochemical treating pond before facultative anaerobic biochemical is handled.Discharge of wastewater after the biochemical treatment.
Following table is the table as a result of sewage disposal.
| Unit (mg/L) | Former water | Equalizing tank | Remove suspension oil | Breakdown of emulsion air supporting | Electrofloatation | Biochemical treatment |
| Petroleum-type | ?2360 | ?253 | ?102 | ?25.6 | ?12.5 | ?2.3 |
| ?COD | ?12400 | ?6720 | ?4130 | ?1030 | ?284 | ?34.7 |
| ?BOD | ?3560 | ?1760 | ?1280 | ?317 | ?106 | ?15.6 |
| ?SS | ?520 | ?320 | ?250 | ?108 | ?79 | ?32.1 |
| ?pH | ?6.4 | ?6.6 | ?6.6 | ?6.9 | ?7.3 | ?7.1 |
Embodiment 2
The difference of present embodiment and embodiment 1 is also to have the aerobic biochemical that carries out successively between described step " breakdown of emulsion and air supporting " and " electrolysis " to handle waste water and settling tank isolating active mud step, activity sludge reflux is to aerobic biochemical treatment tank, and the hydraulic detention time that aerobic biochemical is handled is 1.5 hours; 1), facultative anaerobic biochemical handles waste water step " 5) " may further comprise the steps successively:, hydraulic detention time is 5 hours, 2), aerobic biochemical handles waste water, hydraulic detention time is 6 hours, 3), settling tank isolating active mud, activity sludge reflux is to the facultative anaerobic biochemical treating pond; The hydraulic detention time that removes in the suspension oil facility can be controlled in 1.2 hours; Hydraulic detention time is 0.4 hour in the breakdown of emulsion pond, and the weight ratio of industrial sodium-chlor and lime is 0.8: 15 in the emulsion splitter, and injected volume is weight percentage 0.12%, and the air supporting machine hydraulic detention time behind the breakdown of emulsion is 0.5 hour; Hydraulic detention time in the electrolyzer is 0.4 hour, and battery lead plate adopts iron plate, and the air supporting machine hydraulic detention time after the electrolysis is 0.5 hour.
Following table is the table as a result of sewage disposal.
| Unit (mg/L) | Former water | Equalizing tank | Remove suspension oil | Breakdown of emulsion air supporting | Aerobic biochemical is handled | Electrofloatation | Biochemical treatment |
| Petroleum-type | ?3750 | ?181 | ?84 | ?18.5 | ?10.3 | ?7.3 | ?0.8 |
| ?COD | ?18300 | ?7640 | ?5370 | ?2810 | ?845 | ?684 | ?78.4 |
| ?BOD | ?6120 | ?2800 | ?2090 | ?1130 | ?289 | ?247 | ?11.3 |
| ?SS | ?1120 | ?894 | ?354 | ?112 | ?58 | ?84 | ?33.9 |
| ?pH | ?6.9 | ?6.9 | ?6.9 | ?7.3 | ?7.1 | ?7.5 | ?7.2 |
Claims (9)
1, a kind of high-concentration emulsified oil wastewater treatment process is characterized in that it may further comprise the steps successively:
1), in oil trap, exclude the upper strata oil slick,
2), the waste water that will exclude behind the oil slick of upper strata enters equalizing tank, removes suspension oil afterwards again,
3), will go up waste water breakdown of emulsion and dissolved air flotation upper strata waste oil and throw out after the step process,
4), the waste water that will go up after the step process advances the electrolyzer electrolysis, dissolved air flotation upper strata waste oil and throw out again,
5), the waste water after the step process in the biochemical treatment.
2, a kind of high-concentration emulsified oil wastewater treatment process as claimed in claim 1 is characterized in that described biochemical treatment waste water may further comprise the steps successively:
1), aerobic biochemical handles waste water,
2), facultative anaerobic biochemical handles waste water,
3), aerobic biochemical handles waste water,
4), settling tank isolating active mud.
3, a kind of high-concentration emulsified oil wastewater treatment process as claimed in claim 1, it is characterized in that also having the aerobic biochemical that carries out successively between described step " 3) " and " 4) " handles waste water and settling tank isolating active mud step, described step " 5) " may further comprise the steps successively:
1), facultative anaerobic biochemical handles waste water,
2), aerobic biochemical handles waste water,
3), settling tank isolating active mud.
4, as claim 1,2 or 3 described a kind of high-concentration emulsified oil wastewater treatment processs,
It is characterized in that described " remove suspension oil " adopt inclined tube oil removing and filter successively.
5. as claim 1,2 or 3 described a kind of high-concentration emulsified oil wastewater treatment processs, it is characterized in that described breakdown of emulsion adopts industrial sodium-chlor and lime as emulsion splitter, the mass ratio of industry sodium-chlor and lime is 0.8: 5-20, injected volume are mass percent 0.05-0.15%.
6. as claim 1,2 or 3 described a kind of high-concentration emulsified oil wastewater treatment processs, it is characterized in that described electrolysis is pulse electrolysis, battery lead plate adopts stainless steel or iron plate, and the battery lead plate bipolarity is arranged.
7. as claim 1,2 or 3 described a kind of high-concentration emulsified oil wastewater treatment processs, it is characterized in that described biochemical treatment employing cloth or blanket or filter cloth as filler, packing specific area 20-40 metre squared per cubic.
8. as claim 1,2 or 3 described a kind of high-concentration emulsified oil wastewater treatment processs, it is characterized in that the described hydraulic detention time that removes the suspension oil step is 1-2 hour; To removing in the waste water breakdown of emulsion and dissolved air flotation upper strata waste oil and throw out step behind the suspension oil, its breakdown of emulsion hydraulic detention time is 0.2-0.8 hour, and its dissolved air flotation upper strata waste oil and throw out hydraulic detention time are 0.3-1.2 hour; In electrolysis and dissolved air flotation upper strata waste oil and the throw out step, its electrolyzer hydraulic detention time is 0.2-0.5 hour, and its dissolved air flotation upper strata waste oil and throw out hydraulic detention time are 0.3-1.2 hour.
9. as claim 2 or 3 described a kind of high-concentration emulsified oil wastewater treatment processs, it is characterized in that it is 1-4 hour that described facultative anaerobic biochemical is handled the hydraulic detention time of the preceding aerobic biochemical processing waste water of waste water; The hydraulic detention time that facultative anaerobic biochemical is handled waste water is 4-8 hour; The hydraulic detention time that facultative anaerobic biochemical is handled the aerobic biochemical processing waste water behind the waste water is 4-10 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159346 CN1206178C (en) | 2002-12-23 | 2002-12-23 | High-concentrated emulsified oil waste water treating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159346 CN1206178C (en) | 2002-12-23 | 2002-12-23 | High-concentrated emulsified oil waste water treating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510000A CN1510000A (en) | 2004-07-07 |
| CN1206178C true CN1206178C (en) | 2005-06-15 |
Family
ID=34237436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02159346 Expired - Fee Related CN1206178C (en) | 2002-12-23 | 2002-12-23 | High-concentrated emulsified oil waste water treating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1206178C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706789A (en) * | 2018-05-17 | 2018-10-26 | 山西华仕低碳技术研究院有限公司 | A kind of coal chemical industrial waste water processing demulsification air-float degreasing device |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180566A (en) * | 2011-03-19 | 2011-09-14 | 汤苏云 | Process method for combining physical-chemical treatment and biochemical treatment for reinjection water with oil-field produced water |
| CN102139969B (en) * | 2011-05-11 | 2012-10-10 | 上海膜达克环保工程有限公司 | Emulsified oil waste water treatment system and process |
| CN102887596B (en) * | 2011-12-20 | 2014-03-12 | 辽宁华孚环境工程股份有限公司 | Method and device for treating oil-containing emulsified wastewater or waste emulsion |
| CN105293827A (en) * | 2015-11-05 | 2016-02-03 | 前海天乙投资管理（深圳）有限公司 | High emulsified oily wastewater treatment method and high emulsified oily wastewater treatment system |
| CN107226578A (en) * | 2016-03-24 | 2017-10-03 | 长江三星能源科技股份有限公司 | One kind is used for offshore oilfield polymer-bearing waste-water reinjection treatment method |
| CN109928469A (en) * | 2017-12-18 | 2019-06-25 | 天津大学 | A kind of DC electric field acts on the breaking device of lower oil-in-water emulsion |
| CN109928468A (en) * | 2017-12-18 | 2019-06-25 | 天津大学 | A kind of DC electric field acts on the breaking method of lower oil-in-water emulsion |
| CN108558145A (en) * | 2018-03-03 | 2018-09-21 | 郭保祥 | A kind of equipment of electromagnetism separation oxygenation Afforestation water |
| CN108862935A (en) * | 2018-08-10 | 2018-11-23 | 浙江奇彩环境科技股份有限公司 | Oil-refining chemical wastewater treatment method |
| CN114350412A (en) * | 2021-12-10 | 2022-04-15 | 未名合一生物环保有限公司通道分公司 | Household garbage pyrolysis gas carbonization treatment system and technology thereof |
-
2002
- 2002-12-23 CN CN 02159346 patent/CN1206178C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706789A (en) * | 2018-05-17 | 2018-10-26 | 山西华仕低碳技术研究院有限公司 | A kind of coal chemical industrial waste water processing demulsification air-float degreasing device |
| CN108706789B (en) * | 2018-05-17 | 2020-09-29 | 山西华仕低碳技术研究院有限公司 | Coal chemical wastewater treatment breakdown of emulsion air supporting deoiling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1510000A (en) | 2004-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1141263C (en) | Method for controlling oil-bearing waste water | |
| CN100572524C (en) | The oil field re-injection water microbiological treatment process | |
| CN101244879B (en) | Oil-containing oil emulsion waste water treatment process | |
| CN1206178C (en) | High-concentrated emulsified oil waste water treating method | |
| CN110713314A (en) | Method for treating landfill leachate | |
| CN201082877Y (en) | Oil-containing sewage treating apparatus | |
| CN1736904A (en) | Refuse percolate treatment method | |
| CN101805090B (en) | Process for treating fracturing flow-back fluid of oil well | |
| CN207375910U (en) | A kind of processing system of landfill leachate | |
| CN105417899A (en) | Ultrasonic electro-adsorption electro-Fenton and desalination and decoloration water treatment device and method | |
| CN207276369U (en) | Processing unit is arranged outside a kind of fracturing outlet liquid | |
| CN102976552A (en) | Method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater | |
| CN100344559C (en) | Method for cyclically utilizing middle water of public toilet sewage and specialized equipment therefor | |
| CN102040311A (en) | Oil field polymer flooding produced water treatment method | |
| CN1587089A (en) | Process for treatnig paper-making waste water of waste paper | |
| CN108249635A (en) | Processing unit is arranged outside a kind of fracturing outlet liquid | |
| CN108264169A (en) | A kind of drilling well oil-containing waste water treating device | |
| CN1210215C (en) | Process for deep treating sewage and reuse | |
| CN105217878A (en) | A kind of high-concentration emulsified oil wastewater treatment process | |
| CN205575867U (en) | Industrial wastewater treatment system | |
| CN109748455A (en) | A kind of set technique handling fracturing outlet liquid | |
| CN104556567A (en) | Reclaimed water treating device and method for treating reclaimed water by using same | |
| CN104129874A (en) | Method for treating sewage in refined oil store | |
| CN114212853B (en) | Air floatation tank for demulsification of emulsified oil-containing wastewater, wastewater treatment system comprising air floatation tank and method | |
| CN1300017C (en) | Tech. process for reducing mineralization of extracting oil sewage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Taizhou Zhongchang Water Treatment Equipment Co., Ltd. Assignor: Zhan Bojun Contract fulfillment period: 2007.1.5 to 2017.1.5 contract change Contract record no.: 2008330001888 Denomination of invention: High-concentrated emulsified oil waste water treating method Granted publication date: 20050615 License type: Exclusive license Record date: 20081111 |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.1.5 TO 2017.1.5; CHANGE OF CONTRACT Name of requester: TAIZHOU ZHONGCHANG WATER PROCESSING EQUIPMENT CO., Effective date: 20081111 |