What is the main design objective of secondary clari ers for

What is the main design objective of secondary clari ers for attached growth processes? Why is it different from the design of secondary clarifers following suspended growth processes?

Solution

Secondary clarifiers main objective is to remove the bio mass and to remove the micro organisims.

In attached growth system, waste water passes throught the biomass and sufficient food is made available to the micro oranisms.

In suspended growth system, bio mass layer is passes through waste water. It is possible thorugh by arranging rotating discs like in rotatory biological contractors.