CN1907879A - Method for treatment of wool washing waste water - Google Patents
Method for treatment of wool washing waste water Download PDFInfo
- Publication number
- CN1907879A CN1907879A CNA2006100529059A CN200610052905A CN1907879A CN 1907879 A CN1907879 A CN 1907879A CN A2006100529059 A CNA2006100529059 A CN A2006100529059A CN 200610052905 A CN200610052905 A CN 200610052905A CN 1907879 A CN1907879 A CN 1907879A
- Authority
- CN
- China
- Prior art keywords
- wool
- liquid
- lanolin
- wastewater treatment
- reverse
- 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.)
- Granted
Links
- 210000002268 wool Anatomy 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005406 washing Methods 0.000 title claims abstract description 28
- 239000002351 wastewater Substances 0.000 title claims description 24
- 239000004166 Lanolin Substances 0.000 claims abstract description 29
- 229940039717 lanolin Drugs 0.000 claims abstract description 29
- 235000019388 lanolin Nutrition 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 23
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 17
- 238000005119 centrifugation Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 239000004695 Polyether sulfone Substances 0.000 claims 1
- 229920006393 polyether sulfone Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
- 238000011084 recovery Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 2
- 239000000654 additive Substances 0.000 abstract 1
- 238000013459 approach Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 13
- 238000000108 ultra-filtration Methods 0.000 description 9
- 239000003513 alkali Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000193738 Bacillus anthracis Species 0.000 description 1
- 241000589562 Brucella Species 0.000 description 1
- 229920012266 Poly(ether sulfone) PES Polymers 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a wool wastewater treatment method. The method comprises: 1) settling, 2) ultrafiltering to obtain the through liquid and condensed liquid, 3) treating the through liquid by reverse osmosis, treating the condensed liquid by recovery of lanolin, and 4) recycling the through liquid and condensed liquid from reverse osmosis respectively. The invention simplifies the wastewater treatment process and ways to avoid the problems of conventional approaches like longer process, not obvious effects, and secondary pollution caused by various chemicals and additives. The remarkable is that the water after every level of treatment process can be reused, which is conducive to recovery of lanolin and make full use of the treated water in the wool washing process, therefore achieving water recycling.
Description
Technical field
The present invention relates to a kind of wool wastewater treatment method.
Background technology
Wool washing waste water is the high concentrated organic wastewater that produces in the wool-cleaning technology, composition is very complicated, pollutents such as its main component lanolin are because saponification and emulsifying effect are suspended state, and are highly muddy, also contain Brucella, intestinal bacteria, anthrax bacterium etc. in the water to the pathogenic big bacterium of people.Waste water from washing wool lanolin content 5～20g/L, the COD value is generally 4 * 10
4～6 * 10
4Between the mg/L, can reach 10 * 10
4Mg/L.Can cause severe contamination to environment if this waste water directly enters water body, and the lanolin in the waste water still is a kind of industrial raw material with high added value.
To wool wastewater treatment method, that appears in the newspapers has: air supporting-catalytic oxidation-air-float technology, coagulating sedimentation-air-float technology, two air supporting, grease-acidifying-two air-float technologies, anaerobism-acidication-catalytic oxidation-air-float technology, oscillatory shear ripple membrane filtration technique, inorganic embrane method, ultrafiltration-centrifugation process.Its purpose of these technologies all is that wool washing waste water is processed into the waste water that reaches emission standard, and the direct discharging of waste water after will handling, and causes the waste of the water resources and the energy.
For the research of lanolin recovery technology, reported have a series of treatment technologies such as centrifugal, the air supporting of machinery, coagulation, acid are split, electrolysis, extraction.Wherein, adopt that machinery is centrifugal, air supporting, coagulation, acid splits method, the rate of recovery of lanolin is no more than 50%.And, adopt acid to split method and need consume a large amount of sulfuric acid.Adopt electrolytic process that lanolin is reclaimed, the rate of recovery can reach 52%～55%, but this method is owing to there is hydrogen to produce in electrolytic process, and when air mixed arrived certain proportion, meeting spark can explode, so device is complicated, maintenance bothers, and current consumption is big.Adopt extraction process, the rate of recovery of lanolin can reach 60%～70%, but owing to there is middle emulsion layer between waste water from washing wool and reality, partial solvent is got rid of loss and the waste that causes solvent with waste water.If the employing Coagulation Method, as a unit of wastewater treatment, with couplings such as air supporting method, electrolytic process, extraction processs, but because the use of nonionic detergent is had some difficulties traditional coagulation recovery technology.
Summary of the invention
Technical problem to be solved by this invention provides a kind of wool wastewater treatment method that makes wool washing waste water can access and recycle and be beneficial to the lanolin recovery.For this reason, the present invention is by the following technical solutions: it comprises following treatment step successively to wool washing waste water:
1), sedimentation,
2), uf processing,
3), the liquid that sees through of uf processing is carried out reverse-osmosis treated, the concentrated solution of uf processing is reclaimed lanolin,
4), reverse-osmosis treated seen through liquid and concentrated solution reuse respectively.
Owing to adopt technical scheme of the present invention, simplified the flow process and the method for waste water treatment, the shortcomings such as secondary pollution that when avoiding adopting ordinary method to handle, governance flowchart is long, DeGrain and the various chemical agents of interpolation cause.More outstanding is that the water after each grade treatment process is handled can both be utilized, and not only is beneficial to the recovery of lanolin but also makes the water after handling can all recycle in washing wool technology, reaches the recycle of water resources.Through measuring and calculating, it also has following outstanding technique effect:
1, reduced the quantity discharged of COD dramatically.Washing the COD value in 1 year of wool production line by one is 27 * 10
5Kilogram calculates, and the whole nation is in 150, and then the COD total amount is about 4050 * 10
5Kilogram/year.Washing wool water can be by after the reuse, and the annual quantity discharged that reduces COD in the whole nation is 3645 * 10
5Kilogram has greatly reduced the quantity discharged of COD, alleviates pollution on the environment greatly;
2, washing wool water can be by after the reuse, alkali and washing composition are recycled, and the wool production line is washed in 150 in the whole nation, annual 13500 tons in alkali of discharging, 13500 tons in the washing composition of reducing in the whole nation, reduced the quantity discharged of alkali and washing composition discharging, alleviated destruction ecotope.
3, washing wool water can be by after the reuse, and the wool production line is washed in 150 in the whole nation, can save 8,100,000 tons of water every year, significantly reduces discharged waste water, alleviates the pollution of water body on every side, significantly reduces the water loss of wool processing industry.
4, washing wool water can be by after the reuse, and the heat in the waste water is also simultaneously by reuse, and the wool production line is washed in 150 in the whole nation, the annual heat 1128.6 * 10 that reclaims
7Kilojoule～1881 * 10
7Kilojoule makes full use of waste heat, reduces the consumption to energy, saves production cost.
The present invention also provides a kind of lanolin recovery method that can access high-recovery, and it adopts following steps to reclaim lanolin:
1), the concentrated solution multistage centrifugal of uf processing is separated,
2), adopt extraction to reclaim lanolin to the solid substance after the centrifugation, the liquid object after the centrifugation is returned the sedimentation treatment process.
Adopt above-mentioned recovery method, the rate of recovery of lanolin is reached more than 90%.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is a lanolin extraction process schema of the present invention.
Embodiment
With reference to accompanying drawing.Wool wastewater treatment method provided by the present invention, it comprises following treatment step successively to wool washing waste water:
1), pre-treatment, remove solid impurities such as sand in the wool washing waste water by pretreatment technology such as sedimentations, to guarantee the steady running of subsequent film system.As shown in the figure, after handling, after 5 μ deep bed filter filter, enter next procedure and handle through vertical sedimentation water tank sedimentation.
2), be transfused to ultrafiltration system by transferpump and carry out uf processing through pretreated wool washing waste water, utilize the screening mechanism of ultra-filtration membrane, organism to different molecular weight and different-grain diameter separates, wool washing waste water is after uf processing, ultrafiltration and concentration liquid is reclaimed lanolin, remove to extract lanolin with ultrafiltration and concentration liquid, can greatly reduce the cost that extracts lanolin and improve the lanolin rate of recovery, ultrafiltration sees through in the liquid and contains chemical agents such as alkali, tensio-active agent, as the water inlet of reverse osmosis.
It can the selective membrane material be the tubular type ultra-fine filter of polyethersulfone (PES) that ultrafiltration system is handled wool washing waste water, the crossflow velocity height, and the free from worry no dead angle of runner, long flow path, power consumption is low, is applicable to that the filtrate of high-viscosity material concentrates.
With day output 18m
3The pilot plant meter, the average flux of ultrafiltration system generally can be controlled in every square metre of per hour 40-50L, rejection is more than or equal to 95%, wool washing waste water is through ultrafiltration and concentration more than 10 times.
3), the liquid that sees through of uf processing is carried out reverse-osmosis treated, the concentrated solution of uf processing is reclaimed lanolin,
Before reverse osmosis system, can add security personnel's strainer, remove ultrafiltration and see through large granular impurity in the liquid, the protection reverse osmosis membrane.The liquid that sees through after the uf processing flows into through the liquid water tank, filters through security personnel's strainer after the topping-up pump supercharging, enters reverse osmosis system by high-pressure pump again and handles.
The reverse osmosis membrane material can select to tolerate the reverse osmosis membrane of relevant temperature according to the waste water water temperature, generally can select 45 ℃ of high-temperature resistants, the reverse osmosis membrane of PH scope 2-11, such as, polymeric amide (PPA), resistance to crocking is good and water flux is big, is best selection to handling wool washing waste water.Utilize the high cutoff performance of fine and close reverse osmosis membrane, hold back uf processing and see through most inorganic salt and small organic molecule in the liquid, thus make reverse osmosis see through liquid COD≤20mg/l.
As shown in Figure 1, in washing wool, successively through first road slightly wash, second road is slightly washed, the 3rd road is slightly washed, fine purifiation, rinsing process, wherein, it is little that the operation water requirement is slightly washed in first road, the water requirement of rinsing process is bigger.The liquid that sees through through reverse osmosis system, its water quality has met the water requirement of fine purifiation groove or rinse tank, and can all be used for the water of fine purifiation groove or rinse tank, and in the concentrated solution of reverse osmosis owing to contain materials such as alkali, tensio-active agent, can be used for slightly washing operation, and less because of the concentrated solution volume, the energy fully recovering is avoided discharging in thick washing trough.Because it is higher that reverse osmosis system sees through the water quality of liquid, except can be used for fine purifiation, also can make other industrial uses, certainly, it is the most suitable and economical to be back to the fine purifiation operation.
In the recovery technology of lanolin, it adopts following steps to reclaim lanolin:
1), the concentrated solution multistage centrifugal of uf processing is separated, adopt 2 grades of centrifugations in the present embodiment, the rotating speed of whizzer is 6000～7000rpm;
2), adopt extraction to reclaim lanolin to the solid substance after the centrifugation, extraction agent adopts sherwood oil, and the liquid object after the centrifugation is returned vertical sedimentation water tank.
Adopt aforesaid method that the lanolin rate of recovery is reached more than 90%.
The numerical range of the foregoing description and each concrete selection are the preferred versions that is based upon on the abundant experiment basis, under the prerequisite that guarantees treatment effect, and the most economical full blast of wastewater treatment.
Claims (6)
1, a kind of wool wastewater treatment method is characterized in that it comprises following treatment step successively to wool washing waste water:
1), sedimentation,
2), uf processing,
3), the liquid that sees through of uf processing is carried out reverse-osmosis treated, the concentrated solution of uf processing is reclaimed lanolin,
4), reverse-osmosis treated seen through liquid and concentrated solution reuse respectively.
2, a kind of wool wastewater treatment method as claimed in claim 1 is characterized in that its employing following steps reclaims lanolin:
1), the concentrated solution multistage centrifugal of uf processing is separated,
2), adopt extraction to reclaim lanolin to the solid substance after the centrifugation, the liquid object after the centrifugation is returned the sedimentation treatment process.
3, a kind of wool wastewater treatment method as claimed in claim 1 is characterized in that uf processing adopts the tubular type ultra-fine filter, and the mould material that is adopted is a polyethersulfone.
4, a kind of wool wastewater treatment method as claimed in claim 1 is characterized in that the mould material that reverse-osmosis treated adopts is 45 ℃ of heatproofs, the reverse osmosis membrane of PH scope 2-11.
5, a kind of wool wastewater treatment method as claimed in claim 1 is characterized in that the liquid that sees through of reverse-osmosis treated is back to and washes woolen fine purifiation or rinsing process.
6, a kind of wool wastewater treatment method as claimed in claim 1, the concentrated solution that it is characterized in that reverse-osmosis treated are back to washes woolen and slightly washes operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100529059A CN100427411C (en) | 2006-08-08 | 2006-08-08 | Method for treatment of wool washing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100529059A CN100427411C (en) | 2006-08-08 | 2006-08-08 | Method for treatment of wool washing waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1907879A true CN1907879A (en) | 2007-02-07 |
| CN100427411C CN100427411C (en) | 2008-10-22 |
Family
ID=37699137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100529059A Expired - Fee Related CN100427411C (en) | 2006-08-08 | 2006-08-08 | Method for treatment of wool washing waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100427411C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226132A (en) * | 2011-05-10 | 2011-10-26 | 张家港宇新羊毛工业有限公司 | Method for extracting lanolin from wool scouring wastewater |
| CN102674576A (en) * | 2011-03-10 | 2012-09-19 | 苏州波塞顿节能环保工程有限公司 | Method for treating wool wastewater |
| CN104591439A (en) * | 2015-01-16 | 2015-05-06 | 内蒙古民族大学 | Method for extracting wool grease from sheepskin and wool washing waste water |
| CN106745517A (en) * | 2016-11-30 | 2017-05-31 | 宜宾丝丽雅股份有限公司 | Treatment process of short fiber acidic wastewater |
| CN107892409A (en) * | 2017-11-22 | 2018-04-10 | 东南大学成贤学院 | A kind of efficient reuse method of eider down industrial wastewater and its device |
| CN108726840A (en) * | 2018-06-02 | 2018-11-02 | 苏州弘宇水处理工程服务有限公司 | Waste water from washing wool comprehensive recycling technique |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194914C (en) * | 2001-08-21 | 2005-03-30 | 武艺群 | Scouring waste water closed circulating method |
-
2006
- 2006-08-08 CN CNB2006100529059A patent/CN100427411C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674576A (en) * | 2011-03-10 | 2012-09-19 | 苏州波塞顿节能环保工程有限公司 | Method for treating wool wastewater |
| CN102226132A (en) * | 2011-05-10 | 2011-10-26 | 张家港宇新羊毛工业有限公司 | Method for extracting lanolin from wool scouring wastewater |
| CN104591439A (en) * | 2015-01-16 | 2015-05-06 | 内蒙古民族大学 | Method for extracting wool grease from sheepskin and wool washing waste water |
| CN106745517A (en) * | 2016-11-30 | 2017-05-31 | 宜宾丝丽雅股份有限公司 | Treatment process of short fiber acidic wastewater |
| CN107892409A (en) * | 2017-11-22 | 2018-04-10 | 东南大学成贤学院 | A kind of efficient reuse method of eider down industrial wastewater and its device |
| CN108726840A (en) * | 2018-06-02 | 2018-11-02 | 苏州弘宇水处理工程服务有限公司 | Waste water from washing wool comprehensive recycling technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100427411C (en) | 2008-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105000737B (en) | A kind of Industrial sewage treatment system and sewage water treatment method | |
| CN104609605B (en) | Device and method for realizing printing and dyeing dyed wastewater reuse and dye recovery | |
| CN103755081B (en) | A kind of method that alkali decrement waste water resource reclaims terephthaldehyde's bronsted lowry acids and bases bronsted lowry | |
| CN100427411C (en) | Method for treatment of wool washing waste water | |
| CN103663759B (en) | High-recovery-rate saline wastewater membrane combination and separation process and application | |
| CN202912799U (en) | Comprehensive recycling system of metal plating wastewater resources | |
| CN101857320B (en) | Method for treatment of silk degumming wastewater and recovery of silk gum | |
| CN100486918C (en) | Method for realizing closed cycle of dyeing waste water | |
| CN102745836A (en) | Processing method of orange-can production wastewater | |
| CN210030227U (en) | Concentration treatment device for chemical nickel plating rinsing wastewater | |
| CN108128939A (en) | A kind of method and device with Integrated Membrane Technology processing rare-earth smelting high ammonia-nitrogen wastewater | |
| CN102993039A (en) | Method for recovering dimethyl acetamide in polyether sulfone spinning wastewater | |
| CN201343455Y (en) | Wastewater treatment system with metallic ion | |
| CN218435031U (en) | Metal surface treatment liquid recycling system | |
| CN102249436A (en) | Method for concentrating CMP (chemi-mechanical pulp) waste liquid by using membrane process | |
| CN104529020B (en) | A kind of automobile decoration piece electroplating waste water treatment system | |
| CN205933453U (en) | High recovery pit water recycling system | |
| CN101870639A (en) | Method for producing kelp mannitol with low energy consumption | |
| CN112028270A (en) | Concentration treatment device and treatment method for chemical nickel plating rinsing wastewater | |
| CN103015246A (en) | Method for comprehensively using pulping waste water by sulfite method | |
| CN102372624B (en) | Method for extracting sodium gulonate from sodium gulonate fermented liquid | |
| CN216472254U (en) | Sulfuric acid process titanium white powder is washed weak waste acid membrane integration resourceful treatment system once | |
| CN101423307A (en) | Method for recycling spent caustic liquid during chitin production process | |
| CN1300017C (en) | Tech. process for reducing mineralization of extracting oil sewage | |
| CN109133421B (en) | A kind of advanced treatment of wastewater recycling system |
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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 50, Wen Yi Xi Road, Xihu District, Hangzhou, Zhejiang. Zip code: 310012 Co-patentee after: Wuxi ultrafiltration equipment factory Patentee after: Hangzhou water treatment technology research and Development Center Co., Ltd. Co-patentee after: Zhangjiagang Hong Hong Wool Textile Co., Ltd. Address before: 50, Wen Yi Xi Road, Xihu District, Hangzhou, Zhejiang. Zip code: 310012 Co-patentee before: Wuxi ultrafiltration equipment factory Patentee before: State Oceanic Administration Hangzhou water treatment technology research and Development Center Co-patentee before: Zhangjiagang Hong Hong Wool Textile Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU WATER TREATMENT TECHNOLOGY RESEARCH AND D Free format text: FORMER NAME: STATE OCEANIC ADMINISTRATION, HANGZHOU WATER TREATMENT TECHNOLOGY RESEARCH AND DEVELOPMENT CENTER |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20120808 |