... friendly product. With the characteristics of producing more flocculation, high sedimentation rate, it is widely used in dealing with drinking water, ... quality and highly efficient iron salt polymeric flocculant; 2. High sedimentation velocity; 3. Good water purification effect, non-toxic, safe ... 6 min, then 60r/min for 4 min. (3)Sedimentation: water flow shall be very slow at this stage for ...