CN106350860A - Method for improving efficiency of online recycling membrane-process closed system for silver plating rinse water - Google Patents
Method for improving efficiency of online recycling membrane-process closed system for silver plating rinse water Download PDFInfo
- Publication number
- CN106350860A CN106350860A CN201610792225.4A CN201610792225A CN106350860A CN 106350860 A CN106350860 A CN 106350860A CN 201610792225 A CN201610792225 A CN 201610792225A CN 106350860 A CN106350860 A CN 106350860A
- Authority
- CN
- China
- Prior art keywords
- plated
- silver
- online resource
- poaching wastewater
- embrane method
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/20—Regeneration of process solutions of rinse-solutions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a method for improving efficiency of an online recycling membrane-process closed system for silver plating rinse water. The method includes adding ammonia polyaspartate into the online recycling membrane-process closed system for the silver plating rinse water, wherein the addition amount of the ammonia polyaspartate enables the concentration thereof to be 0.5-50 ppm on the thick side of a membrane in the system. Compared with the prior art, the method has the advantages that the performance of the online recycling membrane-process closed system for the silver plating rinse water is improved greatly, and lower cost and continuous performing without secondary pollution are achieved.
Description
Technical field
The present invention relates to field of environment protection, specifically, refer to a kind of silver-plated poaching wastewater online resource of raising
The method changing embrane method closed-system efficiency.
Background technology
Plating is the important process link of manufacturing, waste discharge complicated component.The average annual discharge capacity of China's electroplating wastewater
Up to 4,000,000,000 tons, wherein poaching wastewater accounts for 80%, about 3,200,000,000 tons.Silver-plated is a kind of main plating in China, silver-plated accordingly
Poaching wastewater is also the larger electroplate rinsing wastewater of discharge capacity.Except the heavy metal classes pollutant containing silver ion, also contain phase
When organic compound such as the additive of quantity, brighteners, these chemical substances enter environment, will necessarily be to human health and ring
Border is caused and its serious harm.
Silver-plated poaching wastewater processes most common method at present chemical precipitation method, ion exchange and membrane separation process, but
Chemical precipitation method is for the purpose of qualified discharge, and sludge quantity is big, and processing cost is high, and heavy metal silver is not considered as a kind of resource and returns
With causing economic benefit essentially negative.Ion exchange can only realize the reuse of heavy metal silver ion, and other materials are for example all kinds of
Additive then could cannot be arranged after must removing further containing the various additives in addition to silver ion in reuse, and waste water
Putting or reclaim, additionally, also needing medicament to regenerate after ion exchange resin adsorption saturation, producing secondary pollution.Number of patent application is
201610331251.7 patent of invention discloses a kind of method of plating piece poaching wastewater online resource, and the method is by plating piece
Poaching wastewater sequentially passes through multi-stage countercurrent cleaning, filtration, reverse-osmosis treated, nanofiltration process and evaporation and concentrating or direct reuse,
Reclaim the metal ion in plating piece poaching wastewater and additive, return in plating piece groove as plating piece liquid, reclaim plating piece poaching wastewater
In water, the reuse as plating piece washings, realize online resourceization utilize.Compared with prior art, this invention adopts reverse osmosis
Permeable membrane assembly, being capable of heavy metal effectively in reuse plating piece poaching wastewater in front, nanofiltration membrane component posterior novel compositions mode
Ion and various additives and water, realize the online resource of plating piece poaching wastewater, and greatly reduce operation energy consumption and economy
Cost.
Compared with chemical precipitation method and ion exchange, embrane method is not only administering method, and is a kind of method of resource,
Realize the recycling of pollutant.But embrane method there is also a shortcoming, that is, film is vulnerable to the pollution of electroplating bath components, thus logical
Amount declines, and energy consumption increases.For reverse osmosiss and NF membrane, Chemical cleaning is the main method controlling fouling membrane." Nanjing Normal University is learned
Report (natural science edition) " volume 33 the 2nd phase " being applied to the Chemical cleaning of the reverse osmosis membrane of electroplating wastewater processing " one literary composition, to application
Reverse osmosis unit in electroplating wastewater processing has carried out the research of Chemical cleaning, removes removing heavy metals initially with 1% chlorohydric acid pickling
Pollution, then carry out alkali cleaning and remove face using 1%naoh and 0.025% dodecylbenzene sodium sulfonate (sds) mixing cleanout fluid
Organic pollution, finally adopts the non oxidizing bactericide 2 that concentration is 50mg/l, the double bromo -3- nitrilo--propionic acid amide. of 2-
(dbnpa) clean biological pollution.After cleaning, membrane flux under 0.5mpa for this device is by the 13.9l/m before cleaning2H improves
To 28.3l/m2H, membrane flux returns to the 89.4% of initial stage.Obviously, chemical cleaning method has following drawback: needs to stop
Cleaning；It is both needed to every time add abluent；After cleaning, waste liquid produces secondary pollution.
Content of the invention
The purpose of the present invention is exactly to overcome the defect of above-mentioned prior art presence to provide a kind of raising silver-plated rinsing
The method of waste water online resource embrane method closed-system efficiency.
The purpose of the present invention can be achieved through the following technical solutions: a kind of silver-plated poaching wastewater online resource of raising
The method of embrane method closed-system efficiency is it is characterised in that the method is to close in described silver-plated poaching wastewater online resource embrane method
Poly-aspartate ammonia is added, by suppressing silver nitrate, thiosemicarbazide, 3 kinds of compositions of surfactant in silver plating liquid in assembly system
Complexity materialization polymerization process, especially abolish the central role of thiosemicarbazide, stop inorganic organic combined pollution from being formed,
The long-time performance maintaining higher membrane flux, improving silver-plated poaching wastewater online resource embrane method closed-system, reduces economical
Operating cost.The addition of poly-aspartate ammonia be make its in systems the dense side of film concentration be 0.5～50ppm.
Described silver-plated poaching wastewater online resource embrane method closed-system includes plating piece groove, and is connected successively by pipeline
The rinse bath, regulating reservoir, low-lift pump, cartridge filter, high-pressure pump, reverse osmosis membrane apparatus, nano filter membrance device and the falling film type that connect steam
Send out device, downward film evaporator be additionally provided with concentrated solution outlet and condensation-water drain, wherein, concentrated solution outlet is also connected with plating piece groove,
Condensation-water drain is also connected with rinse bath, forms embrane method closed-system.
Described rinse bath is provided with least one-level.
The clear water side of described reverse osmosis membrane apparatus connects rinse bath, and concentrated water side connects nano filter membrance device, poly- sky in system
The addition of winter propylhomoserin ammonia is to make it be 0.5～50ppm in the concentrated water side concentration of reverse osmosis membrane apparatus.
The clear water side of described nano filter membrance device connects the influent side of reverse osmosis unit, and concentrated water side connects falling film type evaporation
Device.
Described poly-aspartate ammonia can be appointed in described silver-plated poaching wastewater online resource embrane method closed-system
Add at one.
Described poly-aspartate ammonia is crystal habit or solution state.
Compared with prior art, the invention has the advantages that
1. additive poly-aspartate ammonia can suppress silver nitrate in silver plating liquid, thiosemicarbazide, 3 kinds of one-tenth of surfactant
Point complexity materialization polymerization process, especially abolish the central role of thiosemicarbazide, effectively stop inorganic being organically combined
Pollution is formed, thus maintaining higher membrane flux for a long time, substantially improves silver-plated poaching wastewater online resource embrane method closed system
The performance of system, reduces economic operation cost.
2. cleaning is both needed to add abluent chemical cleaning method every time.Inhibitor poly-aspartate ammonia tool used in the present invention
There is inertia, system operation electrode reaction, the basic no consumption of whole process does not occur, be therefore also not required to add every time clearly
Lotion, has saved Financial cost；
3. chemical cleaning method needs cleaning during shutdown when flux depression is more.In silver-plated poaching wastewater online resource embrane method
In system, plating solution is circulation closure, and inertia inhibitor poly-aspartate ammonia addition plating solution is carried out closed circulation by the present invention, because
This is not required to stop, and can be carried out continuously；
4. chemical cleaning method necessarily leads to waste liquid, and needs to process and could discharge.The poly- Radix Asparagi of inertia inhibitor in the present invention
Propylhomoserin ammonia is circulation, and whole process does not produce extra waste liquid, do not form secondary pollution.
Brief description
Fig. 1 is the schematic diagram of silver-plated poaching wastewater online resource embrane method closed-system.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, silver-plated poaching wastewater online resource embrane method closed-system includes plating piece groove 1, and pass through pipeline
The rinse bath that is sequentially connected, regulating reservoir 5, low-lift pump 6, cartridge filter 7, high-pressure pump 8, reverse osmosis membrane apparatus 9, nano filter membrance device
10 and downward film evaporator 11, downward film evaporator 11 is additionally provided with concentrated solution outlet and condensation-water drain, wherein, concentrated solution goes out
Mouth is also connected with plating piece groove 1, and condensation-water drain is also connected with rinse bath, and rinse bath is provided with three-level, as described in Figure: one-level cleaning in parallel
2, two grades of rinse baths 3 of groove and three-level rinse bath 4.
The clear water side of described reverse osmosis membrane apparatus 9 connects rinse bath, reclaims the clear water after reverse osmosis membrane apparatus 9 filter,
Concentrated water side connects nano filter membrance device 10, is filtered further, and in system, the addition of poly-aspartate ammonia is to make it in reverse osmosis
The concentrated water side concentration of permeable membrane device 9 is 0.5～50ppm.
The clear water side of described nano filter membrance device 10 connects the influent side of reverse osmosis membrane apparatus 9, reclaims clear water, and concentrated water side is even
Connect downward film evaporator 11.
Whole system forms embrane method closed-system.
Plating piece moves towards a by plating piece and is electroplated in electroplating bath 1, and electroplating wastewater cleaned groove three-level countercurrent rinsing is tentatively dense
Contracting, comes together in regulating reservoir 5, under low-lift pump 3 effect, removes through cartridge filter 4 and is more than 5 μm of solid particulate matters, protection is follow-up
The safe operation of membrane filter.It is pressurized to 1.0mpa through high-pressure pump 8, plating piece poaching wastewater enters preposition reverse osmosis membrane assembly 6, reverse osmosis
Thoroughly water outlet c in clear water side can be fully achieved the requirement that plating piece rinses water quality, after recovery with three-level rinse bath in additional clean water b
Mixing；Plating piece poaching wastewater concentration obtains reverse osmosis concentrated water side water outlet d, and is delivered in rearmounted nanofiltration membrane component 10 and carries further
Dense.Nanofiltration membrane component clear water side water outlet e, it is impossible to reach the requirement that plating piece rinses water quality, enters preposition reverse osmosis membrane as water inlet
Assembly 9 purifies further.After nanofiltration membrane component concentrated water side water outlet f further concentration in downward film evaporator 11, gained concentrates
Liquid g enters plating piece groove 1, and condensed water h is as rinsing Water circulation.
Embodiment 1
Add poly-aspartate ammonia crystal at regulating reservoir in silver-plated poaching wastewater online resource embrane method closed-system, add
Plus after in systems the dense side of film concentration be 0.5ppm, by suppress silver plating liquid in silver nitrate, thiosemicarbazide, surfactant
The materialization polymerization process of the complexity of 3 kinds of compositions, especially abolishes the central role of thiosemicarbazide, stops inorganic organically compound dirt
Dye is formed, the long-time performance maintaining higher membrane flux, improving silver-plated poaching wastewater online resource embrane method closed-system, fall
Low economic operation cost.
The present embodiment implementation result:
1. additive poly-aspartate ammonia can suppress silver nitrate in silver plating liquid, thiosemicarbazide, 3 kinds of one-tenth of surfactant
Point complexity materialization polymerization process, especially abolish the central role of thiosemicarbazide, effectively stop inorganic being organically combined
Pollution is formed.Compared with chemical cleaning method, maintain the run time of more than 80% membrane flux to extend 2 times, substantially improve silver-plated drift
Wash the performance of waste water online resource embrane method closed-system, reduce economic operation cost.
2. inhibitor poly-aspartate ammonia used in the present invention has inertia, and electrode does not occur in system operation
Reaction, the basic no consumption of whole process, therefore also it is not required to add abluent every time.Compared with chemical cleaning method, save economy
Operating cost 22%；
3. inertia inhibitor poly-aspartate ammonia addition plating solution is carried out closed circulation by the present invention, with chemical cleaning method phase
Ratio is not required to stop, can be carried out continuously；
4. in the present invention, inertia inhibitor poly-aspartate ammonia is circulation, and whole process does not produce extra waste liquid, not shape
Become secondary pollution.Compared with chemical cleaning method, save the processing cost of cleaning waste liquid, account for the 28% of operating cost.
Embodiment 2
Add poly-aspartate ammonia solution at electroplating bath in silver-plated poaching wastewater online resource embrane method closed-system, add
Plus after in systems the dense side of film concentration be 25.0ppm, by suppress silver plating liquid in silver nitrate, thiosemicarbazide, surface activity
The materialization polymerization process of the complexity of 3 kinds of compositions of agent, especially abolishes the central role of thiosemicarbazide, and prevention is inorganic to be organically combined
Pollution is formed, the long-time performance maintaining higher membrane flux, improving silver-plated poaching wastewater online resource embrane method closed-system,
Reduce economic operation cost.
The present embodiment implementation result:
1. additive poly-aspartate ammonia can suppress silver nitrate in silver plating liquid, thiosemicarbazide, 3 kinds of one-tenth of surfactant
Point complexity materialization polymerization process, especially abolish the central role of thiosemicarbazide, effectively stop inorganic being organically combined
Pollution is formed.Compared with chemical cleaning method, maintain the run time of more than 80% membrane flux to extend 4 times, substantially improve silver-plated drift
Wash the performance of waste water online resource embrane method closed-system, reduce economic operation cost.
2. inhibitor poly-aspartate ammonia used in the present invention has inertia, and electrode does not occur in system operation
Reaction, the basic no consumption of whole process, therefore also it is not required to add abluent every time.Compared with chemical cleaning method, save economy
Operating cost 32%；
3. inertia inhibitor poly-aspartate ammonia addition plating solution is carried out closed circulation by the present invention, with chemical cleaning method phase
Ratio is not required to stop, can be carried out continuously；
4. in the present invention, inertia inhibitor poly-aspartate ammonia is circulation, and whole process does not produce extra waste liquid, not shape
Become secondary pollution.Compared with chemical cleaning method, save the processing cost of cleaning waste liquid, account for the 28% of operating cost.
Embodiment 3
Add poly-aspartate ammonia solution at regulating reservoir in silver-plated poaching wastewater online resource embrane method closed-system, add
Plus after in systems the dense side of film concentration be 50.0ppm, by suppress silver plating liquid in silver nitrate, thiosemicarbazide, surface activity
The materialization polymerization process of the complexity of 3 kinds of compositions of agent, especially abolishes the central role of thiosemicarbazide, and prevention is inorganic to be organically combined
Pollution is formed, the long-time performance maintaining higher membrane flux, improving silver-plated poaching wastewater online resource embrane method closed-system,
Reduce economic operation cost.
The present embodiment implementation result:
1. additive poly-aspartate ammonia can suppress silver nitrate in silver plating liquid, thiosemicarbazide, 3 kinds of one-tenth of surfactant
Point complexity materialization polymerization process, especially abolish the central role of thiosemicarbazide, effectively stop inorganic being organically combined
Pollution is formed.Compared with chemical cleaning method, maintain the run time of more than 80% membrane flux to extend 9 times, substantially improve silver-plated drift
Wash the performance of waste water online resource embrane method closed-system, reduce economic operation cost.
2. inhibitor poly-aspartate ammonia used in the present invention has inertia, and electrode does not occur in system operation
Reaction, the basic no consumption of whole process, therefore also it is not required to add abluent every time.Compared with chemical cleaning method, save economy
Operating cost 43%；
3. inertia inhibitor poly-aspartate ammonia addition plating solution is carried out closed circulation by the present invention, with chemical cleaning method phase
Ratio is not required to stop, can be carried out continuously；
4. in the present invention, inertia inhibitor poly-aspartate ammonia is circulation, and whole process does not produce extra waste liquid, not shape
Become secondary pollution.Compared with chemical cleaning method, save the processing cost of cleaning waste liquid, account for the 28% of operating cost.
Claims (7)
1. a kind of method improving silver-plated poaching wastewater online resource embrane method closed-system efficiency is it is characterised in that the method
It is addition poly-aspartate ammonia in described silver-plated poaching wastewater online resource embrane method closed-system, addition is being for making it
In system, the concentration of the dense side of film is 0.5～50ppm.
2. a kind of side improving silver-plated poaching wastewater online resource embrane method closed-system efficiency according to claim 1
Method is it is characterised in that described silver-plated poaching wastewater online resource embrane method closed-system includes plating piece groove (1), and passes through
Rinse bath that pipeline is sequentially connected, regulating reservoir (5), low-lift pump (6), cartridge filter (7), high-pressure pump (8), reverse osmosis membrane apparatus
(9), nano filter membrance device (10) and downward film evaporator (11), downward film evaporator is additionally provided with concentrated solution outlet and condensation on (11)
Water out, wherein, concentrated solution outlet is also connected with plating piece groove (1), and condensation-water drain is also connected with rinse bath, forms embrane method closed system
System.
3. a kind of side improving silver-plated poaching wastewater online resource embrane method closed-system efficiency according to claim 2
Method is it is characterised in that described rinse bath is provided with least one-level.
4. a kind of side improving silver-plated poaching wastewater online resource embrane method closed-system efficiency according to claim 2
It is characterised in that the clear water side of described reverse osmosis membrane apparatus (9) connects rinse bath, concentrated water side connects nano filter membrance device to method
(10), in system poly-aspartate ammonia addition be make its reverse osmosis membrane apparatus (9) concentrated water side concentration be 0.5～
50ppm.
5. a kind of side improving silver-plated poaching wastewater online resource embrane method closed-system efficiency according to claim 2
Method is it is characterised in that the clear water side of described nano filter membrance device (10) connects the influent side of reverse osmosis membrane apparatus (9), concentrated water side
Connect downward film evaporator (11).
6. a kind of side improving silver-plated poaching wastewater online resource embrane method closed-system efficiency according to claim 1
Method is it is characterised in that described poly-aspartate ammonia can be in described silver-plated poaching wastewater online resource embrane method closed system
In system, arbitrary place adds.
7. a kind of side improving silver-plated poaching wastewater online resource embrane method closed-system efficiency according to claim 1
Method is it is characterised in that described poly-aspartate ammonia is crystal habit or solution state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792225.4A CN106350860A (en) | 2016-08-31 | 2016-08-31 | Method for improving efficiency of online recycling membrane-process closed system for silver plating rinse water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792225.4A CN106350860A (en) | 2016-08-31 | 2016-08-31 | Method for improving efficiency of online recycling membrane-process closed system for silver plating rinse water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106350860A true CN106350860A (en) | 2017-01-25 |
Family
ID=57856746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610792225.4A Pending CN106350860A (en) | 2016-08-31 | 2016-08-31 | Method for improving efficiency of online recycling membrane-process closed system for silver plating rinse water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106350860A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830592A (en) * | 2010-05-11 | 2010-09-15 | 吴志文 | Nickel-containing washing waste water recycling treatment system |
| CN102642972A (en) * | 2012-05-04 | 2012-08-22 | 无锡方舟环保有限公司 | Zero-discharging treatment method of high concentration electroplating wastewater |
-
2016
- 2016-08-31 CN CN201610792225.4A patent/CN106350860A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830592A (en) * | 2010-05-11 | 2010-09-15 | 吴志文 | Nickel-containing washing waste water recycling treatment system |
| CN102642972A (en) * | 2012-05-04 | 2012-08-22 | 无锡方舟环保有限公司 | Zero-discharging treatment method of high concentration electroplating wastewater |
Non-Patent Citations (3)
| Title |
|---|
| 陈水辉: "实例分析电镀废水处理回用工艺的应用", 《化工管理》 * |
| 陈益棠 等: "反渗透一纳滤组合工艺、特征方程及潜在应用", 《2006海水淡化与水再利用西湖论坛》 * |
| 韶晖 等: "聚天冬氨酸钠的阻垢性能", 《精细石油化工》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105967416A (en) | Plating piece rinsing wastewater on-line recycling method | |
| CN101734815A (en) | Electronic electroplating wastewater recycling advanced treatment technology | |
| CN101565248A (en) | Electroplating wastewater processing method | |
| WO2024113798A1 (en) | Membrane treatment technology for copper-containing wastewater generated in pcb production process | |
| CN201610402U (en) | Recycling and deep treatment device for electronic electroplating wastewater | |
| CN106215708A (en) | Improve the short-cut method of nickel zinc electroplate rinsing wastewater online resource embrane method closed-system efficiency | |
| CN201737744U (en) | Processing device realizing reduction of electroplating rinse-wastewater and double-membrane multipoint separate recycling | |
| CN210528699U (en) | Landfill leachate treatment system with biochemical effluent softening function | |
| CN203602414U (en) | System for recovering silvering wastewater and silver | |
| CN103112970A (en) | Heavy metal recovery and zero emission system and process | |
| CN106495379B (en) | A kind of electroplating rinse water circulating and recovering and heavy metal recovery technique | |
| CN204454775U (en) | A kind of trivalent chromium passivation Wastewater zero-discharge treatment system | |
| CN108854560A (en) | A kind of RO cleaning agents of membrane | |
| CN205528097U (en) | Processing system of nickeliferous waste water that anodic oxidation hole sealing produced | |
| CN207958039U (en) | A kind of pickle liquor Treatment and recovery utilizes device | |
| CN205099523U (en) | Heavy metal wastewater handles and recovery system | |
| CN204752384U (en) | Electroplate rinsing effluent disposal system | |
| CN101244876A (en) | Apparatus for treating waste water for plating preprocessing process and processing method | |
| CN106350860A (en) | Method for improving efficiency of online recycling membrane-process closed system for silver plating rinse water | |
| CN106215707A (en) | Improve the short-cut method of tin plating poaching wastewater online resource embrane method closed-system performance | |
| CN107601729B (en) | Strong salt wastewater zero-discharge treatment process and system for steel industry | |
| CN105174567A (en) | Heavy metal wastewater treatment and recovery system and method | |
| CN102531243B (en) | Zero-emission production process of electrolytic manganese wastewater | |
| CN105481150A (en) | Treatment equipment for wastewater containing heavy metal | |
| CN107096388B (en) | A kind of forward osmosis membrane cleaning method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |