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Flocculation and sedimentation


Flocculation sedimentation treatment uses flocculants to make the suspended particles in the water to coalesce and settle when the treatment process.

Flocculation sedimentation treatment uses flocculants to make the suspended particles in the water to coalesce and settle when the treatment process.


When the alum formed in the ground water or the organic suspended matter of domestic sewage and activated sludge are settled in the sedimentation tank after adding flocculants, the flocs collide and coalesce with each other, the particle size becomes larger, and the settling speed increases with the depth. At this time, the efficiency of water sedimentation processing not only depends on the particle settling speed, but also related to the depth of the sedimentation tank. Flocculation process for the water of fine colloids and dispersed particles due to the role of molecular attraction bonding cohesion process, divided into two types of free flocculation and contact flocculation (the former occurs in the sedimentation tank, while the latter occurs in the suspension clarifier or contact filter tank), the generation of alum in the sedimentation, filtration and other water treatment process to strengthen and improve the efficiency of treatment.

Flocculation and sedimentation

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