extruded aluminum pcb enclosure.Wastewater treatment of zinc die casting processing plant

　　1、 Electroplating wastewater

　　There are many electroplating production processes, and the wastewater generated is also divided into many types, with different treatment methods.

　　1. Cyanide containing wastewater

　　The best treatment method for cyanide containing wastewater is to use alkaline chlorination method. During the treatment process, attention should be paid to separating cyanide wastewater from other wastewater to avoid mixing iron and other metal ions in the wastewater.

　　2. Chromium containing wastewater

　　The treatment of wastewater containing hexavalent chromium is generally carried out using chromium reduction method.

　　2、 Surface treatment wastewater

　　Due to the presence of abrasives, polishing agents, and other pollutants, the main pollutants are COD, BOD, and SS. In order to reduce the difficulty of treating wastewater before surface polishing, neutral or weakly alkaline degreasing agents should be selected.

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