During which process is cationic polymer used?

Cationic polymers are primarily used in the chemical coagulation process, which is essential in water and wastewater treatment. During chemical coagulation, cationic polymers help to destabilize colloidal particles in water by neutralizing their negative charges. This flocculation process encourages these particles to clump together, forming larger aggregates or flocs. These flocs can then be more easily removed during subsequent treatment processes, such as sedimentation or filtration.

The use of cationic polymers enhances the efficiency of the coagulation process, allowing for better removal of suspended solids, organic materials, and other contaminants from the water. This is critical in ensuring that the treated water meets regulatory standards for safe discharge or further treatment.