SPFS is a flocculant in purification of municipal water, industrial water, waste water, domestic sewage and sludge dewatering. Based on the ... polymer to decolor the sewage of dyeing and printing industry, it has no the defects of Polymer Ferric Sulphate ... Coagulation excellent, alum dense, fast settlement.3, excellent water effect, good water quality, aluminum, chlorine, and heavy metal ion are ...