Circular Clarifier

Circular clarifier is the most famous design of clarifiers and it is preferred for secondary classification. It is used for both primary and secondary units in smaller plants. The design of the circular clarifier must consider a balance between the necessity to the dissipate energy while assuring the flow to the clarification zone is balanced. Circular clarifiers provide continuous removal and separation of suspended solids from water and wastewater and that too at low cost.



Variations of Circular Clarifiers
Circular clarifier can be used in various options:

• Conventional Circular Clarifier with Central Drive: It is provided with a central rake drive mechanism that is supported on a bridge. It can either be half bridge or full bridge according to the clarifier tank size or the requirement of plant.
  
  
• Conventional Circular Clarifier with Peripheral Drive: It is offered with a rake drive which travels on the peripheral tank wall. It is pivoted at the centre and is carried on an properly sized bearing supported on the centre pier.
  
  
• Circular Clarifier with Tow Bro Header: This is mechanically similar to the central driven conventional circular clarifier except the fact that the sludge withdrawal is achieved hydraulically through a hollow tube forming part of the rake assembly.