As a water purification agent, polyferric sulfate has a very good effect on sludge dewatering. Polyferric sulfate can improve the sludge dewatering rate by regulating the sludge, so that the sludge volume can be reduced, which not only saves the space of each other's sludge, reduces the sludge treatment cost, and improves the sludge treatment effect. At present, the combined use of PFS and PAM can improve the sludge treatment efficiency again.

Polymerized ferric sulfate, as a high molecular polymer, will form a multi-core colloidal substance after dissolving into water. In water treatment, it not only has a very good flocculation effect, but also makes the sludge have a certain adsorption capacity, and these sludge will form a large sediment through the effect of adsorption capacity. This characteristic of PFS makes the alum formed in water treatment larger, and through the action of PFS, more dense and less water content precipitation is formed.

When PFS is used in combination with polyacrylamide, because of the coagulation effect and coagulation aid function of polyacrylamide, on the one hand, PFS can improve the coagulation efficiency and regulate the properties of sludge; on the other hand, the coagulation effect of polyacrylamide itself and the stronger coagulation effect of PFS can work together, The dewatering efficiency of sludge has been improved significantly.

Polyferric sulfate can improve the dewatering effect of sludge by more than 50%. It has more comprehensive effect when used with polyacrylamide. At present, PFS is cheap and one of the favorite products in sewage treatment and sludge dewatering.