Treatment plant was designed for 9 MGD. It is currently processing 13 MGD. Your task is to assess the expected treatment performance of the primary clarifiers. There are two clarifiers 45 feet in diameter. What percent removal of TSS and BOD do you expect from these clarifiers.
% TSS removal :
% BOD removal:
Soln:
1) Calculate the area of each clarifier
2) Calculate the overflow rate based on area and annual average daily flow
3) Look up percent removal based on overflow rate