Nanchang Hangkong University

Huanhai Chen

Fan Zhang

Jun Zhang

A method for treating electroplating wastewater includes: performing a cyanide primary treatment on to-be-treated cyanide containing wastewater in a treatment tank by using a chlor-alkali process; performing a cyanide secondary treatment on the wastewater after cyanide primary treatment by controlling an addictive amount of chromium containing wastewater and adding acid liquor for adjusting a pH value of the wastewater to a preset acidity range; performing a hexavalent chromium reduction treatment on the wastewater after the cyanide secondary treatment by adding acid liquor for adjusting a pH value of the wastewater to a preset acidity range and adding a sulfite solution; and performing neutralization flocculation, solid-liquid separation, and sand filtration on the wastewater after the hexavalent chromium reduction treatment sequentially to obtain dischargeable water meeting a preset standard. The method can effectively remove harmful substances such as cyanide, chromium, copper and zinc, to thereby reduce environmental pollution and save treatment costs.

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Nanchang, China

Huanhai Chen