Waste minimization in the electroplating industry (case study)

Treatment of electroplating wastewater bearing cyanide and chromium VI was carried out, after which the pretreated wastewater was mixed with other industrial wastes prior to a combined chemical coagulation‐sedimentation treatment. The results obtained showed that the use of lime in combination with ferric chloride achieved a high removal values of organic and inorganic pollutants. Complete destruction of cyanide and complete removal of chromium were achieved. Full detailed engineering design and cost estimation work for a full scale treatment unit was also carried out.