CN102040289A - Method and equipment for regenerating and recycling textile dyeing wastewater - Google Patents
Method and equipment for regenerating and recycling textile dyeing wastewater Download PDFInfo
- Publication number
- CN102040289A CN102040289A CN2009101127418A CN200910112741A CN102040289A CN 102040289 A CN102040289 A CN 102040289A CN 2009101127418 A CN2009101127418 A CN 2009101127418A CN 200910112741 A CN200910112741 A CN 200910112741A CN 102040289 A CN102040289 A CN 102040289A
- Authority
- CN
- China
- Prior art keywords
- water
- dyeing wastewater
- textile printing
- dyeing
- wastewater
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 81
- 238000004043 dyeing Methods 0.000 title claims abstract description 67
- 239000004753 textile Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004064 recycling Methods 0.000 title abstract 3
- 230000001172 regenerating effect Effects 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 9
- 239000010865 sewage Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000011069 regeneration method Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 13
- 238000005189 flocculation Methods 0.000 claims description 11
- 230000016615 flocculation Effects 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 230000008929 regeneration Effects 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 4
- 238000005352 clarification Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 208000028659 discharge Diseases 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 239000008235 industrial water Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method and equipment for retreating textile dyeing wastewater which is treated and reaches the emission standard so that the wastewater accords with the reuse water standard in the dyeing industry. The method for regenerating and recycling textile dyeing wastewater comprises the following steps of: (1) collecting and storing textile dyeing wastewater which is treated and reaches the emission standard; (2) carrying out flocculating settling treatment on the wastewater, clarifying and separating; (3) filtering the clarified and separated wastewater and removing granular suspended substances contained in the wastewater; and (4) treating the wastewater which is filtered in the step (3) by utilizing a membrane treatment method, separating into a dialysate and a concentrated solution which reach the reuse water standard in the dyeing industry, and directly discharging the concentrated solution when reaching the discharge standard, otherwise conveying the concentrated solution to a sewage treatment plant to be treated. The equipment for regenerating and recycling textile dyeing wastewater comprises a collecting tank, a mechanical clarifying tank, a valve-free filtering tank, an adjusting tank, a guided filter and a reverse osmosis membrane treatment device.
Description
Technical field
The present invention relates to the method and apparatus that the printing and dyeing industry reuse water requires is handled, made it to meet to the textile printing and dyeing wastewater that reaches emission standard after treatment again.
Background technology
Known, the textile printing and dyeing production process need consume great lot of water resources, also discharges a large amount of trade effluents simultaneously.According to statistics, national textile printing and dyeing water consumption 116.48 billion cubic meters in 2008, the dyeing waste water of discharging has a strong impact on ecotope, has restricted the benign development of textile printing and dyeing industry.
At present, printing and dyeing enterprise generally all has the processing of perfect Sewage treatment systems to textile printing and dyeing wastewater, and water outlet reaches one-level or secondary discharge standard after the sewage disposal.But, because the shortage day by day and the severe contamination of water resources, still be the requirement of environmental protection protection no matter from the enterprise cost angle, dyeing waste water is carried out advanced treatment after reuse very necessary.
Summary of the invention
The purpose of this invention is to provide and a kind of the method that the printing and dyeing industry reuse water requires is handled, made it to meet to the textile printing and dyeing wastewater that reaches emission standard after treatment again.
Another object of the present invention provides a kind of being used for the equipment that the printing and dyeing industry reuse water requires is handled, made it to meet to the textile printing and dyeing wastewater that reaches emission standard after treatment again.
For this reason, textile printing and dyeing wastewater regeneration method provided by the invention may further comprise the steps:
(1) collects the textile printing and dyeing wastewater that storage reaches emission standard after treatment;
(2) waste water is carried out flocculation sediment and handle and clarify separation;
(3) waste water after the clarification separation is filtered, remove the contained residual suspended substance of particulate state in the waste water;
(4) utilize the waste water after membrane processing method filters step (3) to handle, be separated into the dialyzate and the concentrated solution that reach the requirement of printing and dyeing industry reuse water, and when concentrated solution reaches emission standard, directly discharge, handle otherwise concentrated solution is delivered to sewage work.
Textile printing and dyeing wastewater described in the step (1) is meant the waste water that reaches national grade one discharge standard (GB4287-92) after treatment.
In the step (2), adopt mechanical fining process and use polyacrylamide as flocculation agent, polyacrylamide consumption weight ratio be handle ten thousand of the water yield/.
In the step (2), the wastewater treatment time is 100-120 minute.
In the step (3), the wastewater treatment time is 45-60 minute.
Step (4) comprises waste water after secondary filter, makes boost in pressure to 10～15kg, adopts the reverse osmosis membrane processing method to separate again.
Textile printing and dyeing wastewater regeneration equipment provided by the invention comprises:
Water collecting basin is used to collect the textile printing and dyeing wastewater that storage reaches emission standard after treatment;
The machinery settling pond adds flocculation agent in the pond, described mechanical settling pond is used for receiving the water outlet of water collecting basin and carries out the flocculation reaction process and clarify sepn process in the pond;
Filtration unit is used to receive the water outlet of mechanical settling pond, and residual suspended substance contained in the water is filtered;
Equalizing tank is used to receive the waste water after filtration is installed in storage after filtration;
Film processing system is used to receive the water outlet of equalizing tank, is separated into the dialyzate and the concentrated solution that reach the requirement of printing and dyeing industry reuse water after the processing.
Further, film processing system comprises
Security personnel's strainer is used to receive the water outlet of equalizing tank, and carries out fine filtering;
The high-pressure pump e Foerderanlage is arranged between security personnel's strainer and the membrane treatment appts, is used for the water outlet of security personnel's strainer is transported to membrane treatment appts; And
Membrane treatment appts is used for waste water is separated into dialyzate and the concentrated solution that reaches the requirement of printing and dyeing industry reuse water.
Further, membrane treatment appts is the continous way reverse osmosis membrane apparatus.
Further, between water collecting basin and the mechanical settling pond, be respectively arranged with the take away pump device between equalizing tank and the film processing system.
Beneficial effect of the present invention is: utilize method and apparatus provided by the invention can realize the dyeing waste water regeneration, significantly reduce printing and dyeing industry water resources consumption amount and wastewater discharge, reduce influence simultaneously reducing enterprise cost, solved the problem that existing textile printing and dyeing industry exists ecotope.Treatment process and equipment are simple, practical, and it is low to have running cost, the characteristics that treatment effect is good.
Below in conjunction with drawings and Examples textile printing and dyeing wastewater regeneration method and apparatus provided by the invention is described in further detail.
Description of drawings
Fig. 1 is the synoptic diagram of an embodiment of textile printing and dyeing wastewater regeneration equipment.
Fig. 2 is the structural representation of mechanical settling pond in the textile printing and dyeing wastewater regeneration equipment.
Fig. 3 is the structural representation of valveless filtering pool in the textile printing and dyeing wastewater regeneration equipment.
Embodiment
Textile printing and dyeing wastewater regeneration method and apparatus is used for carrying out advanced treatment to through reaching the textile printing and dyeing wastewater of emission standard after conventional method of wastewater treatment and the device processes, makes water outlet meet printing and dyeing industry and produces back requirement.
Textile printing and dyeing wastewater regeneration method comprises following flow process:
(1) collects the textile printing and dyeing wastewater that storage reaches emission standard after treatment;
(2) waste water is carried out flocculation sediment and handle and clarify separation;
(3) waste water after the clarification separation is filtered, remove the contained residual suspended substance of particulate state in the waste water;
(4) utilize the waste water after membrane processing method filters step (3) to handle, be separated into the dialyzate and the concentrated solution that reach the requirement of printing and dyeing industry reuse water, and when concentrated solution reaches emission standard, directly discharge, handle otherwise concentrated solution is delivered to sewage work.
Best, the described textile printing and dyeing wastewater that reaches emission standard is the waste water that reaches national grade one discharge standard (GB4287-92) after treatment, but is not limited thereto.
Fig. 1 shows a kind of equipment that is used to realize textile printing and dyeing wastewater regeneration method, and this equipment comprises:
Water collecting basin is used to collect the textile printing and dyeing wastewater that storage reaches emission standard after treatment, and the waste water quality of each time period storage is kept evenly substantially, guarantees the stable of subsequent handling yield and quality.Water in the water collecting basin is transported to mechanical settling pond by dehvery pump 1.The parameter of dehvery pump 1 is: 250 tons/hour of operational throughpuies, 50 meters of lifts, power of motor 50kw.
The machinery settling pond carries out flocculation sediment to waste water and handles and clarify separation.In conjunction with Fig. 2, waste water enters mechanical settling pond by input channel 21, flow into particle aggregation district 23 through distributing hole 22, add polyacrylamide (PAC) flocculation agent in this district, waste water stopped 30 minutes in this district, stirring thorough mixing (paddle wheel frequency 20Hz) under 24 effects of lifting impeller, waste water enters coagulative precipitation disengaging zone 25 and separates the overflow groove 26 that the back flows into Chi Ding, flows to valveless filtering pool through outlet conduit 27 again.Umbrella shape drain cap 28 can be opened under the hydrostaticpressure effect, and the colloidal material that produces in the pond is discharged by evacuated tube 29.Waste water is designed to 100-120 minute by this pond time.
Filtration unit is used for the contained residual suspended substance of water is filtered.Best, filtration unit adopts valveless filtering pool.In conjunction with Fig. 3, the packing layer of valveless filtering pool is placed pebbles 31 (granularity Φ 20-30mm), stone 32 (granularity Φ 3-4mm), sand 33 (granularity Φ 1-2mm) and columnar activated carbon 34 (granularity Φ 1mm) from the bottom to top, and packing layer is 1: 1 to 2: 1 with the footpath ratio in filter tank.Waste water is introduced packing layer from the water-in/contrary wash-down water outlet 35 at top, pond, from top to bottom successively filters, and the processing back is discharged to equalizing tank by the treating water outlet/contrary wash-down water import 36 of bottom, pond.Waste water was by 45-60 minute this pond time.
Equalizing tank is used to receive the water outlet of storage valveless filtering pool, and realizes the film processing system stable water supply.Water in the equalizing tank is transported to security personnel's strainer by dehvery pump 2.The parameter of dehvery pump 2 is: 250 tons/hour of operational throughpuies, 50 meters of lifts, power of motor 50kw.
Film processing system comprises:
Security personnel's strainer is used for further removing fine particle.Security personnel's strainer adopts the stainless steel deep bed filter, in adorn 5 filter bags, filtering accuracy is at 5 μ m.The water outlet of security personnel's strainer is sent waste water boost in pressure to 10～15kg into reverse osmosis membrane apparatus by high-pressure pump.The parameter of high-pressure pump is: 250 tons/hour of operational throughpuies, 140 meters of lifts, power of motor 150kw.
The reverse osmosis membrane processing device mainly is made of 22 film pipes, adorns 6 film cores in every film pipe, amounts to 132 film cores and is connected in series mutually, and operating pressure is between 10～13kg.Waste water separates by the film core, and the film core plays the effect of molecular sieve, and water molecules and than littler can the passing through of water molecules is held back than the tunicle core of the big material of water molecules (comprising most pollutents, metal ion).Water by the film core becomes dialyzate, reaches the dyeing standards for industrial water usage after testing; The water by the film core is not called concentrated solution, if concentrated solution detects when reaching textile dyeing and finishing industrial water pollution thing emission standard (GB4287-92) first discharge standard, can directly discharge, and handles otherwise concentrated solution is delivered to Sewage Plant again.Usually,, separate the every index of concentrated solution that produces and all be better than country (GB4287-92) first discharge standard, therefore adopt directly discharging when the waste water quality condition that enters reverse osmosis membrane apparatus is good.Reverse osmosis membrane apparatus is continous way production, and cycles of concentration is 2 times.Utilize the effect of method and apparatus treatment of dyeing and printing of the present invention to see Table 1.
Table 1
As seen from Table 1, the main water-quality guideline of pending dyeing waste water (COD, BOD, suspended substance, colourity) is better than national grade one discharge standard in water collecting basin, concentrated solution after the separation meets textile dyeing and finishing industrial water pollution thing emission standard (GB4287-92) first discharge standard, can directly discharge, must not return Sewage Plant again and handle.Dialyzate meets the requirement of printing and dyeing industry target water.
The foregoing description only is used for further specifying the method and apparatus that the present invention proposes; but the present invention is not limited to embodiment; every foundation technical spirit of the present invention all belongs to protection scope of the present invention to any simple modification, equivalent variations and modification that above embodiment did.
Claims (10)
1. textile printing and dyeing wastewater regeneration method is characterized in that may further comprise the steps:
(1) collects the textile printing and dyeing wastewater that storage reaches emission standard after treatment;
(2) waste water is carried out flocculation sediment and handle and clarify separation;
(3) waste water after the clarification separation is filtered, remove the contained residual suspended substance of particulate state in the waste water;
(4) utilize the waste water after membrane processing method filters step (3) to handle, be separated into the dialyzate and the concentrated solution that reach the requirement of printing and dyeing industry reuse water, and when concentrated solution reaches emission standard, directly discharge, handle otherwise concentrated solution is delivered to sewage work.
2. textile printing and dyeing wastewater regeneration method according to claim 1 is characterized in that: the textile printing and dyeing wastewater described in the step (1) is meant the waste water that reaches national grade one discharge standard (GB4287-92) after treatment.
3. textile printing and dyeing wastewater regeneration method according to claim 1 is characterized in that: in the step (2), adopt mechanical fining process and use polyacrylamide as flocculation agent, polyacrylamide consumption weight ratio be handle ten thousand of the water yield/.
4. textile printing and dyeing wastewater regeneration method according to claim 1 is characterized in that: in the step (2), the wastewater treatment time is 100-120 minute.
5. textile printing and dyeing wastewater regeneration method according to claim 1 is characterized in that: in the step (3), the wastewater treatment time is 45-60 minute.
6. textile printing and dyeing wastewater regeneration method according to claim 1 is characterized in that: step (4) comprises waste water after secondary filter, makes boost in pressure to 10～15kg, adopts the reverse osmosis membrane processing method to separate again.
7. textile printing and dyeing wastewater regeneration equipment is characterized in that comprising:
Water collecting basin is used to collect the textile printing and dyeing wastewater that storage reaches emission standard after treatment;
The machinery settling pond adds flocculation agent in the pond, described mechanical settling pond is used for receiving the water outlet of water collecting basin and carries out the flocculation reaction process and clarify sepn process in the pond;
Filtration unit is used to receive the water outlet of mechanical settling pond, and residual suspended substance contained in the water is filtered;
Equalizing tank is used to receive the waste water after filtration is installed in storage after filtration;
Film processing system is used to receive the water outlet of equalizing tank, is separated into the dialyzate and the concentrated solution that reach the requirement of printing and dyeing industry reuse water after the processing.
8. textile printing and dyeing wastewater regeneration equipment according to claim 7, it is characterized in that: described film processing system comprises
Security personnel's strainer is used to receive the water outlet of equalizing tank, and carries out fine filtering;
The high-pressure pump e Foerderanlage is arranged between security personnel's strainer and the membrane treatment appts, is used for the water outlet of security personnel's strainer is transported to membrane treatment appts; And
Membrane treatment appts is used for waste water is separated into dialyzate and the concentrated solution that reaches the requirement of printing and dyeing industry reuse water.
9. textile printing and dyeing wastewater regeneration equipment according to claim 8 is characterized in that: membrane treatment appts is the continous way reverse osmosis membrane apparatus.
10. textile printing and dyeing wastewater regeneration equipment according to claim 7 is characterized in that: between water collecting basin and the mechanical settling pond, be respectively arranged with the take away pump device between equalizing tank and the film processing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101127418A CN102040289A (en) | 2009-10-19 | 2009-10-19 | Method and equipment for regenerating and recycling textile dyeing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101127418A CN102040289A (en) | 2009-10-19 | 2009-10-19 | Method and equipment for regenerating and recycling textile dyeing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102040289A true CN102040289A (en) | 2011-05-04 |
Family
ID=43906881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101127418A Pending CN102040289A (en) | 2009-10-19 | 2009-10-19 | Method and equipment for regenerating and recycling textile dyeing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102040289A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849872A (en) * | 2012-08-24 | 2013-01-02 | 蒋泽明 | Treatment and recycling system for textile wastewater |
| CN103408186A (en) * | 2013-07-15 | 2013-11-27 | 嘉兴市永祥环保设备有限公司 | Method for reusing terylene dispersing dye dyeing waste water |
| CN108558062A (en) * | 2018-03-13 | 2018-09-21 | 铜陵县黑你养殖专业合作社 | Wool poaching wastewater treatment for reuse system |
| CN110270145A (en) * | 2018-03-14 | 2019-09-24 | 科德宝·宝翎无纺布（苏州）有限公司 | Slurries filtration device |
| CN111320298A (en) * | 2020-03-03 | 2020-06-23 | 冯露晨 | Printing and dyeing wastewater multi-polarization treatment process |
| CN113045140A (en) * | 2021-03-31 | 2021-06-29 | 江西怡润科技有限公司 | Method for treating printing and dyeing wastewater based on reverse osmosis membrane |
-
2009
- 2009-10-19 CN CN2009101127418A patent/CN102040289A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849872A (en) * | 2012-08-24 | 2013-01-02 | 蒋泽明 | Treatment and recycling system for textile wastewater |
| CN103408186A (en) * | 2013-07-15 | 2013-11-27 | 嘉兴市永祥环保设备有限公司 | Method for reusing terylene dispersing dye dyeing waste water |
| CN103408186B (en) * | 2013-07-15 | 2015-02-04 | 嘉兴市永祥环保设备有限公司 | Method for reusing terylene dispersing dye dyeing waste water |
| CN108558062A (en) * | 2018-03-13 | 2018-09-21 | 铜陵县黑你养殖专业合作社 | Wool poaching wastewater treatment for reuse system |
| CN110270145A (en) * | 2018-03-14 | 2019-09-24 | 科德宝·宝翎无纺布（苏州）有限公司 | Slurries filtration device |
| CN111320298A (en) * | 2020-03-03 | 2020-06-23 | 冯露晨 | Printing and dyeing wastewater multi-polarization treatment process |
| CN113045140A (en) * | 2021-03-31 | 2021-06-29 | 江西怡润科技有限公司 | Method for treating printing and dyeing wastewater based on reverse osmosis membrane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202358976U (en) | Glass wastewater treatment equipment | |
| CN107129111B (en) | Physical method oil field water treatment standard-reaching device and treatment process | |
| CN102040289A (en) | Method and equipment for regenerating and recycling textile dyeing wastewater | |
| CN106865909A (en) | It is applied to the efficient Waste Water Treatment of printing and dyeing enterprise | |
| CN102092886B (en) | Combined sewage treatment method for oil field | |
| CN107585972A (en) | Grease processing waste water handling process and device | |
| CN205442869U (en) | It produces brackish water desalination system of water recovery rate to improve bitter | |
| CN110330140B (en) | System and method for treating, regenerating and recycling water pollution in saline-alkali area | |
| CN211521873U (en) | Treatment system for underground water polluted by landfill leachate | |
| CN101759309A (en) | Water treatment technology | |
| CN209456210U (en) | One kind is for the personal reasonable reclaiming system of water of Boiler water Feeding System | |
| CN207645925U (en) | Reverse osmose pure-water equipment | |
| CN105502748A (en) | Integrated sewage treatment method | |
| CN214060175U (en) | A comprehensive wastewater treatment system for the iron and steel industry | |
| CN105502749B (en) | Sewage integrated treatment device | |
| CN102515421B (en) | Printing and dyeing wastewater recycling system | |
| CN201400615Y (en) | Treatment system of wastewater from circulating water | |
| CN201180165Y (en) | Apparatus for recycling chromium containing electroplating poaching water | |
| CN211255494U (en) | Low-permeability oil field oily sewage reinjection treatment device | |
| CN112607901A (en) | Comprehensive wastewater treatment system and method for steel industry | |
| CN205115171U (en) | Pretreatment of water device gives up in energy -concerving and environment -protective oil field | |
| CN114804547A (en) | High-concentration organic wastewater treatment system and method | |
| CN210796047U (en) | A car washing device with purified water and concentrated water | |
| CN209352686U (en) | A kind of small-scale waste water processing system | |
| CN216584525U (en) | Recirculated cooling water waste water recovery 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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110504 |