Performance evaluation of the Common Effluent Treatment Plant at Vapi (Gujarat, India)

Small scale industries cannot afford to treat their effluents individually, so they adopt Common Effluent Treatment Plant (CETP) for the same. To evaluate the performance of the CETP at Vapi industrial area of South Gujarat (India), effluent samples were collected from inlet of CETP, after primary treatment and after secondary treatment for assessing various parameters like pH, color, total dissolved solids (TDS), total suspended solids (TSS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), phenol, chloride and metals like copper (Cu), lead (Pb) and manganese (Mn). It was observed that COD is reduced by 69%, BOD by 78%, color by 35% and TSS by 58% in secondary treatment.