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The mechanism of coagulation and flocculation

An essential step in the decontamination of water is clarification, which is the physical-chemical process aimed at removing the particles (suspended solids) that cloud water by precipitating them in the form of sludge.

Flocculation is the chemical process of adding substances, known as flocculants, to cause the colloidal substances in the water to stick together, thus facilitating their subsequent filtration and removal. The flocculation process is preceded by coagulation, so we often speak of coagulation-flocculation processes. Continue reading