Polyferric Sulfate (PFS) is a new type of high-efficiency inorganic polymer flocculant. It exhibits excellent coagulation performance, forming dense flocs with rapid settling speed. It offers superior water purification effects and good water quality. It does not contain harmful substances such as aluminum, chlorine, or heavy metal ions, and there is no aqueous phase transfer of ferric ions. It is non-toxic, harmless, safe, and reliable. PFS is widely used in the purification treatment of drinking water, industrial water, various industrial wastewaters, municipal sewage, and sludge dewatering.