Clarifiers are used for the purpose of clarification
of wastewater. Clarification is the widely accepted and the oldest used
method in the effective treatment of water and wastewater. This
operation includes removal of sediment, floating material and turbidity
from raw wastewater. There are two types of clarifier. One is circular
center feed clarifier that operates with the effluent entering through a
center stilling well. It ensures proper residence time of the water in
the clarifier to allow for the settling of the solids. The water rises
and exits through a wall mounted weir. Other type of clarifier is the
circular peripheral flow clarifier. It operates with the water flow
entering the system at the periphery. The water flow is distributed
evenly and spirals down around the annulus of the clarifier. It is done
by means of a specially designed baffle skirt. This configuration
provides maximum settling of solids toward the sludge pick-up.
Types of Water Clarifier
On the basis of applications water clarifiers can be categorized as:
