Flocculant is used to describe the action of polymeric materials which form bridges between individual particles. Bridging occurs when segments of a polymer chain adsorb on different particles and help particles aggregate. Flocculant carrys active groups with a charge which will counterbalance the charge of the particles. Flocculants adsorb on particles and cause destabilization either by bridging or charge neutralizatio. It includes cationic flocculant, anionic flocculant, nonionic flocculant and amphoteric flocculant.