The main source of zinc in electroplating and metal-processing wastewater is electroplating or acid - cleaning towing fluid.
The contaminant is transferred to the rinsing water through the process of metal bleaching.
The pickling process involves dipping the metal (zinc or copper) in a strong acid to remove the oxide from the surface, and then dipping it in a brightener containing a strong chromic acid.
The waste water containing large amounts of hydrochloric acid and zinc, copper and other heavy metal ions and organic brightener, etc, and toxicity is bigger, some also contain carcinogenic, teratogenic and mutagenic toxic substances, great harm to human beings.
Therefore, the electroplating wastewater must be carefully recycled to eliminate or reduce its pollution to the environment.
Electroplating wastewater treatment equipment by adjusting pool, add medicine cabinet, reduction, neutralization reaction pool, pool pH adjustment pool, flocculation pool, inclined tube sedimentation tank, box filter press, clear water reserviors, air flotation, activated carbon filter, etc.
Electroplating wastewater treatment using scrap iron internal electrolysis process, the technology is mainly used after activation of purifying waste water, industrial waste iron when contact with packing wastewater, electrochemical reaction and chemical reaction and physical function, including catalysis, oxidation, reduction, replacement, sink, flocculation, adsorption, such as combination, remove all kinds of metal ions in waste water, the waste water purification.