Treatment of electroplating wastewater by reverse osmosis membrane

Electroplating industries discharge one of the most hazardous industrial wastewaters containing heavy metals. So, there is a growing interest in developing methods for the treatment and recovering water and metals from plating industry effluent. In this study, electroplating wastewater containing chromium (VI) has been treated by means of reverse osmosis (RO) membra-Pne on a pilot plant. The chromium (VI) concentration in the untreated wastewater was 16 ppm. After the treatment, the concentration in the treated water was below 0.1 ppm which is the Iranian National Discharge Standard. The influences of concentration polarization and fouling phenomena were studied in the time interval of 24 h. Therefore, the influence of transmembrane pressure was investigated as the main operating variable. The study shows that increasing transmembrane pressure cause to increase the permeate flow rate and decrease the metal concentration in the permeate flow.

کلیدواژه ها:

Chromium ، Electroplating ، Reverse Osmosis ، Wastewater ، Treatment