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Glossary

Flocculation

The flocculation (from Latin flocculus: small bundle of wool) is a physical/technical process in which the finest suspended or colloidal foreign components of water are coagulated (clumped) in order to be able to deposit and remove them better by sedimentation or filtration. Thus it is possible to remove dissolved substances such as phosphate or some of the dissolved organic carbon from the water. The chemicals used in this process, called flocculants, are subdivided into organic polyelectrolytes and inorganic primary flocculants. The latter are usually hydroxide creators such as calcium hydroxide, aluminum hydroxide or iron hydroxide.