Recycling Wastewater Sewage Water Reclaim system：
Electroplating factory (or workshop) discharge of wastewater and waste liquid, such as bath plating rinse water, waste, equipment cooling water and flush the surface water, the water quality due to the production process, some containing chromium, nickel or contain cadmium, cyanide, acid and alkali, etc. Wastewater of some metal ions with simple cation form (e.g., Ni2 +, Cu2 +, etc.), some with acid radical anions form (such as CrO ), others exist in complex form of complex anion (such as Au (CN) (CN) entertainment, Cd, Cu, P2O7 】. One kind of waste water often contains more than one harmful component, such as cyanide cadmium plating wastewater containing cyanide and cadmium. In addition, the ordinary plating solution often contains organic additives.
Electroplating process is the process of plating the metal through the electrolytic method to the surface of the product. The commonly used plating is nickel plated, copper plated, chrome-plated, galvanizing, cadmium plating, lead plating, silver plating, tin plating and gold plating.
The physical method
In general, the following methods are used to deal with electroplating wastewater, which can effectively remove COD and chromaticity, and remove the specific substances such as heavy metals, hexavalent chromium and cyanide. The physical laws include:
Catalytic micro-electrolysis treatment technology
Micro electrolysis technology is a kind of ideal of high concentration organic wastewater treatment process, the technology used in high salt, refractory, high colority of wastewater treatment not only can greatly reduce cod and colority, can also greatly improve the wastewater biological sex.
The technology is to use micro-electrolyte filler filled with microelectrolyte to produce the "original battery" effect to treat waste water in the absence of electricity.
When the water is in the water, there will be a number of "original batteries" of 1.2V in the device.
The "original battery" USES wastewater to make electrolytes, and the electrolytic oxidation and reduction treatment of wastewater by discharge forming current can be used to degrade organic pollutants.
In the process of the new ecological? O [H], [H], [O], Fe2 + and Fe3 + to many components of REDOX reaction and waste water, such as can break the hair colored wastewater of non-ferrous material base or base aid groups, chain scission, even achieve degradation decoloring effect;
Generated further oxidized to Fe3 +, Fe2 + them has strong adsorption of hydrate - flocculating activity, especially after alkaline adjust pH value to generate hydrogen ferrous oxide and iron hydroxide colloid flocculant, their flocculating ability is much higher than general agent hydrolysis of iron hydroxide colloid, to a large number of small particles dispersed in water flocculation, metal particles and organic macromolecular. Its working principle is based on the electrochemical and oxidation - reduction, a combination of physical and flocculation precipitation.
This technology has a wide range of application, good treatment effect, low cost, short processing time, convenient operation and maintenance, and low power consumption, can be widely used in industrial wastewater pretreatment and depth processing.
Anode: fe-2e to Fe2+ E (Fe/Fe2 +) =0.44V
Cathode: 2H dagger + 2e - H2 E(H dagger/H2) =0.00V
When oxygen exists, the cathode is as follows:
O2 + 4H dagger + 4e - 2H2O E (O2)=1.23V
O2 + 2H2O + 4e to 4OH minus E (O2 /OH minus) =0.41V
The new micro - electrolytic filler is a kind of multi - catalytic oxidation filler which is developed in response to the characteristics of refractory biodegradable wastewater.
It is produced by multi-metal alloy fusion catalyst and high temperature micropore activation technology.
It can effectively remove COD, reduce chromaticity, improve biodegradability and maintain stable and lasting effect. Meanwhile, it can avoid the packing passivation and slabbing in the process.
This filler is an important guarantee for the continuous action of micro-electrolysis reaction, which brings new life to the current treatment of chemical wastewater.
The microporous structure of the activated carbon has very much and huge surface area compared to the same period, usually 1 g of activated carbon surface area of 700 ~ 1700 m2, and with a strong physical adsorption, adsorption in the wastewater can be effectively hexavalent chromium (Cr6, +) ions such as heavy metal ions. When activated carbon reaches the adsorption equilibrium, the adsorption can be removed by heating, acid soaking and alkali soaking, and the activated carbon can be regenerated.
Biological method is the high - tech technology to deal with electroplating wastewater. Using artificial cultivation of desulfurization isolated bacteria, branches adhesive bacteria, chromate reducing bacteria, sulfate reducing bacteria functions such as bacteria, electrostatic adsorption on electroplating wastewater, enzyme catalytic conversion, complexation, flocculation, parcel coprecipitation function and the effect on pH buffer. Harmful metals are deposited in sludge to be recycled and used for the use of bacteria and other USES. The biological method is the main direction for the treatment of electroplating wastewater in the future. It is the main direction for the treatment of electroplating wastewater treatment in the future.
In general, electroplating wastewater is treated as follows: it is used to treat waste water with pharmaceutical products, and the toxic substances in the wastewater can be converted to precipitates that are not toxic or toxic.
Chemical methods include:
Neutralization of precipitation
If acidic wastewater is neutralized with alkaline wastewater or alkaline substances, sediment can be formed.
Neutralization of coagulation sedimentation
In chromium ion exchange of denitrification process, for example, cation exchange column of regeneration of waste liquid containing heavy metal ions (Zn2 +, Cr3, +, Fe3 +, etc.) of strongly acidic waste liquid, can be used to remove the acid radical anion exchange column regeneration of waste alkali liquor or alkaline neutralization, precipitation in the form of hydroxide.
The sedimentation and separation properties of this sediment can be changed by adding high molecular flocculant.
Such as cyanide wastewater treatment, commonly used in alkaline hypochlorite oxidation under the condition of the cyanide ion, decomposed into low toxicity of cyanate, then further degradation of nontoxic carbon dioxide and nitrogen.
If the chromium containing wastewater is treated with sodium bisulfite or ferrous sulfate, the Cr6+ is reduced to a toxic low Cr3+ and formed chromium hydroxide precipitation.
Barium salt method
If the chromium containing wastewater is treated with barium salt, the chromate of chromate can be precipitated by barium chromate.
Electroplating wastewater is processed to produce iron hydroxide or other heavy metal hydride precipitation, and the heavy metal is transferred into ferrite crystallization by oxidizing reaction.
This method can be used in the treatment of chromium wastewater.
Chemical method equipment is simple, investment is less, application is wide.
But the sludge needs to be further treated, and the electroplating wastewater is dispersed and the sludge is not easy to be concentrated and utilized.
The physical method
This paper mainly includes electrolytic method, ion exchange method and membrane separation method.
Silver machine processing
Features of guowei type:
1. Using a pure physical method of dual electrolysis, only a small amount of electricity, no secondary pollution.
2. The extraction of silver is more than 99%, and the extraction of silver is above 98%.
3. The waste fixing solution with high concentration of drugs can be processed by ion exchange method and air float method.
4. It can be used to deal with the colorful drift liquid containing high bleach content which can not be processed by domestic external electrolysis.
5. The silver content of residual waste liquid can reach 0.02 g/l, and after subsequent environmental treatment, the waste liquid silver content can be reduced
Below 0.2 PPM, meet the most stringent European emission standards.
6. The operation realizes full automatic control of the microcomputer, which requires no special supervision and low energy consumption.
7. The equipment is compact and compact, with a small footprint and large processing capacity, which can reach 1500-1800 litres/month.
8. The equipment does not require any consumables and electrolytic promoters, and the cost of operation and maintenance is low.
1. The amount of silver residue after lifting silver is less than 0.01 g/l
2. Silver purity: 99.5%
3. The size 360 * 280 * 800 mm
4. Working voltage: ac 220V
5. Power 20 w
6. Processing capacity (month) 30 litres - 30,000 litres
To handle the wastewater containing chromium, for example, by using soluble anode, under the effect of dc field, produce ferrous ion, under the condition of acid in the waste water to CrO 厈 and Cr2O 崼 Cr6, + ions reduction become Cr3, + ions, with increasing wastewater pH value in the process of electrolysis, formation of Cr (OH) 3 precipitation.
The anodes of different materials can be used to treat wastewater containing other kinds of metal ions.
The operation management of electrolysis method is simple, except that it can process the chromium plating and rinse water, it can also process passivation, anodization, phosphating and other bleaching water, and have complete set of equipment.
But it consumes more steel and more power, and has no proper treatment for the sludge produced.
Product description of Photoelectric wastewater reuse equipment :
Voltage: 380V 50Hz, the voltage can be as local demand
Payment term: Unionpay transfer
Delivery date: Negotiable
Packing: export standard
Market: Middle East/ Africa/Asia/South America/Europe/North America
Warranty: 1 year
MOQ: 1 set
1. Strict production process: meet the requirements of product design and process, and provide reliable test data.
2. Short delivery time: according to the equipment model, we provide fast delivery and installation services.
3. Safe packaging: all supporting parts are packed in paper bags and the equipment is sealed with winding film to ensure the safe arrival of the site.
Finally, container transport suitable for sea transport.
4. Best after-sales service: more than 60% of our products are exported to southeast Asia, Africa and Taiwan. All products are trusted by customers at home and abroad.
Parts of customers:
Welcome to buy the quality and durable at low price from our factory. Now we want to service the customers all over the world, We sincerely welcome your inquiries and look forward to our cooperation!
Company: Wuxi Blue Sky Water Treatment Equipment Co., Ltd.
Add: No 5,rongqiang Road, Wuxi city, Jiangsu Prov, china
remarks：Main Equipments Packages Testing Devices Delivery:
500kg or more