The theoretical basis is: "aggregation" theory, the flocculant is mainly a group with positive (negative) electrical properties and some particles or particles with negative (positive) electrical properties in the water that are difficult to separate, reducing their potential, It is placed in an unstable state and its polymeric properties are used to concentrate these particles and separate them by physical or chemical means.
Agents commonly used for this purpose are referred to as flocculants. Flocculants are mainly used in the field of feed water and sewage treatment.