Approbation of alternative polymeric coagulants to eliminate turbidity of model surface water

Performance to remove turbidity was studied in model waters for five coagulants: ferric chloride, alum, polyaluminum chloride, polyferric sulfate and polyaluminum chloride ferrous. In waters with high turbidity (100-300 NTU) performance of coagulants are similar (over 90%). Polymer coagulants showed better performance and low optimal dosages in waters with low turbidity (10 NTU). In general, polyferric sulfate showed better performance in removal of turbidity.