Clarification is the oldest and most widely used operation in the effective treatment of wastewater. Mechanical Clarifiers in the activated sludge process serve a dual purpose. They must provide a clarified effluent and a concentrated source of return sludge for maintaining process control, removing sediment, turbidity, and floating material from wastewater.
Adequate area and depth is essential to allow the aeration tank effluent (MLSS) to settle and compact without carryover of solids in the clarified effluent.
