... of municipal water, industrial water, waste water, domestic sewage and sludge dewatering. Based on the product of Polymer Ferric Sulphate, we develop ... printing industry, it has no the defects of Polymer Ferric Sulphate. It solution is weak acid. Properties:1, New type, ... , fast settlement.3, excellent water effect, good water quality, aluminum, chlorine, and heavy metal ion are not included, non-toxic ...