Product Name: electroplating wastewater treatment equipment characteristics: (1) chemical precipitation; (2) the oxidation-reduction treatment; (3) solvent extraction separation method; (4) adsorption; (5) membrane separation technology; (6) ion-exchange method ; (7) biological treatment technology. Scope: for the electroplating industry cyanide, chromium, acids, alkalis, heavy metal plasma types and multiple types of electroplating wastewater treatment, waste water treatment is also applicable to the metallurgical, chemical, machinery, electronics and other industries relevant pollutants. Little investment, especially for small electroplating electroplating wastewater treatment plant. Also suitable for large, medium and small electroplating enterprises in electroplating wastewater typically contains large amounts of Cr6 +, Cr3 +, Ni2 +, Cu2 + and other heavy metal ions, which is typical of heavy metal ions in wastewater. CODcr and BOD5 no problems need to be addressed. The method of handling this type of waste. Overall mainly with physical and chemical methods. Chemical precipitation method of mature, stable technology to facilitate debugging, the treatment effect changed little over time. Process: chemical precipitation to comprehensive process of electroplating wastewater. Closed loop electroplating wastewater treatment equipment and technology: (1) acid rinse water: collect separately during and after treatment and reuse. (2) alkali copper wash water: collect separately after breaking Cu2 + and bright copper cyanide wastewater treatment and reuse or desalination merger reuse. (3) nickel washing water: collect separately controlling the pH treatment and reuse or desalination be reused. (4) containing chromium clean water: collect separately for removing a redox Cr (OH) 3 were later reuse or desalination treatment and reuse. Typically, acid-containing washing water from the pretreatment of the workpiece, after removal of water and oil slick is generally 10mg / L, after treatment of oily emulsion breaking oil separator 0.005mg / L. Directly back to acid, alkali cleaning tank. As shown in Figure 1. After cleaning water was collected cyanide, pump into the reaction vessel, the pH was adjusted oxidizing agent is added, the mixture was stirred broken cyanide CNgCO2 + N2 through the reaction vessel and bright copper wash water were mixed, stirred flocculant is added to adjust the pH, sedimentation, the frame press After separation of water filtration machines, under normal circumstances, the salinity of the smaller [C1-] ≤250mg / L, [SO42 +] ≤250mg / L can be directly reused in the cleaning bath. When it is recycled after ten days in which the electrical conductivity measurement, open desalination system. After the reverse osmosis membrane treatment, the effluent P = 6-10M / cm into pure water tank for reuse. After the nickel-containing cleaning water was collected, pump into the reaction vessel, stirred settling flocculant is added to adjust the pH. Frame filter separated by water. Ibid remaining segment processing. After the chromium-containing washing water was collected, the pump into the reaction vessel, FeSO4 was added with stirring to adjust the pH of redox Cr6 + Cr3 + lime was further added to form metal hydroxide precipitate isolated by filtration after frame filter water, generally Under the salt content can be directly reused for smaller cleaning bath. When the cycle was measured using the conductivity of about ten days, and start desalination system, after the reverse osmosis membrane treatment effluent P = 6-10M / cm into pure water tank for reuse. Scope for the electroplating industry cyanide, chromium, acids, alkalis, heavy metal plasma types and multiple types of electroplating wastewater treatment, waste water treatment is also applicable to the metallurgical, chemical, machinery, electronics and other industries relevant pollutants. Little investment, especially for small electroplating electroplating wastewater treatment plant. Also suitable for large, medium and small electroplating enterprises and electroplating workshop. For industry cloth waterproof coating industry, rubber industry, plastic industry, synthetic leather industry, petroleum chemical industry, plastics industry, electronic industry, pharmaceutical, automotive, printing ink industry, machinery and other industrial solvent.