Polyacrylamide (PAM) is a linear polymer compound. Due to its various active groups, it can form hydrogen bonds with many substances through affinity and adsorption. It primarily flocculates negatively charged colloids and possesses functions such as turbidity removal, decolorization, adsorption, and adhesion. It is suitable for wastewater treatment with high organic colloid content in industries such as dyeing, papermaking, food processing, construction, metallurgy, mineral processing, coal powder, oil fields, aquatic product processing, and fermentation. It is particularly suitable for dewatering municipal sewage, municipal sludge, papermaking sludge, and other industrial sludge.