Pilot-scale study of efficient coagulation sedimentation of micro-polluted water

This pilot-scale study is based on an efficient coagulation sedimentation process technology used for micro-polluted water treatment of Beijing-Hangzhou Grand Canal(BHGC). The best coagulant among PAC, Al₂(SO₄)₃ and FeCl₃ and its optimal dosage were studied in coagulation sedimentation jar test. The best coagulant was PAC, and its optimal dosage was 40 mg/L. The coagulation sedimentation jar test showed that the organic removal rate could be affected by pH value definitely, and using the PAC as coagulant, water temperature had less impact on the removal rate of turbidity. The continuous experimental operation showed that the turbidity and COD_Mn could be scientifically removed by the efficient coagulation sedimentation operation system.