Electroplating wastewater treatment technology processing process

Electroplating wastewater is more complex water quality, waste water containing chromium, zinc, copper, nickel, cadmium and other heavy metal ions, and acid, alkali, cyanide and other substances with great toxicity.

Electroplating wastewater treatment technology processing process

1  pretreatment process

  • nickel-containing wastewater in the nickel ions are a class of pollutants, must be collected separately, and give full consideration to the recovery of precious metal nickel.Nickel-containing wastewater can be divided into nickel sulfate wastewater and chemical nickel wastewater, which, nickel sulfate wastewater using a mature membrane treatment process or ion exchange resin to achieve resource recovery, Chemical nickel wastewater collected separately, the physical and chemical pretreatment precipitation separation of nickel mud from the high economic value.
  • Cyanide ions in cyanide wastewater in the acidic case is easy to form a very high toxicity “hydrogen cyanide” gas, the health of the human body great harm; At the same time, cyanide and heavy metals combined with complex anionic form, the treatment is very difficult. Therefore, cyanide-containing wastewater must be separately collected after the pretreatment of cyanide, and then mixed with other heavy metal wastewater treatment.
  • Chromium-containing waste water in a class of pollutants, must be collected separately, and take full account of the recycling of chromium. Among them, the recovery of chromium-containing waste water tank using ion exchange resin adsorption process, the residual hexavalent chromium is extremely toxic and dangerous, must be reduced to six gold trivalent chromium precipitation, with other heavy metal wastewater mixed treatment.
  • High COD wastewater includes electroplating pretreatment wastewater and post-plating wastewater. The main pollutants include a variety of oil and plating additives, COD high, B / C low, biodegradability is poor. After advanced oxidation pretreatment, enter the integrated regulation pool.

2   Treatment Technology of Electroplating Wastewater Treatment Technology.

3

  • Electroplating wastewater treatment technology solutions.
  • Submerged Pretreatment Technology for Classification of Electroplating Wastewater.
  • Integrated wastewater treatment technology.
  • Wastewater Advanced Treatment Reuse Technology.
  • Waste residue treatment and resource reuse technology. 

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