Thickening and clarification technologies aim at an efficient liquid-solid separation by sedimentation.
Clariﬁers remove turbidity and suspended matter from water.
STC realizes three types of equipment:
- Circular Clariﬁers/Thickeners
- Rectangular Clarifiers
- Lamella Clariﬁers
Depending on the size, the equipment are ﬁeld-erected tanks or prefabricated tanks.
Thickeners focus on the settled solids, and clarifiers focus on the clear overflow liquor, free of suspended solids. Both processes use gravity but they are often enhanced with chemical treatment (coagulation, pH adjustment, coagulation enhancement and ﬂoc formation) to speed up the settling process. A rake mechanism in the bottom of the equipment allows the settled solids extraction from the center of the tank (circular) or bottom end (rectangular).
The Lamella Clariﬁer has a different sedimentation chamber design, with external slow-mix and fast-mix
Chambers and it has inclined plates to enhance the separation of ﬂoc from the water and reduced space requirement.