Polyacrylamide is a linear organic polymer, but also a polymer water treatment flocculant products, specifically can adsorb suspended particles in water, between the particles to play a role in linking bridges, so that fine particles form a relatively large floc, and accelerate the speed of precipitation. This process is called flocculation because of its good flocculation effect PAM as a flocculant for water treatment and is widely used in sewage treatment.