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A Debate: Circular Clarifiers or Rectangular Clarifers - "Rectangular Clarifiers Should Be Considered" and Rebuttal to "Rectangular Clarifiers Should Be Considered" and "The Case for Circular Clarifiers" and Rebuttal to "The Case for Circular Clarifiers"
Author: Denny S. Parker, Thomas E. Wilson
Date: 4/191
Reprinted from Water/Engineering and Management, April 1991

In recent years a number of designers seem to have eliminated rectangular clarifiers form their design repertoires. Many others never have designed one. This appears to be particularly true for clarifies following activated sludge aeration basins. Some states have even taken, or are considering, positions favoring circular clarifiers over rectangular clarifiers. In my view, it is a mistake to overlook rectangular clarifiers. In my firm's practice, we find both circular and rectangular clarifiers have their place. We've designed about the same number of each. Since it is understood that Dr. Parker will address circular clarifiers, my remarks will concentrate on rectangular clarifiers¾specifically rectangular clarifiers following activated sludge aeration basins.

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