Question: Using at least two identical secondary clarifiers, calculate the diameter of each clarifier for an activated sludge WWTP that treats 12 MGD. The MLSS is

Using at least two identical secondary clarifiers, calculate the diameter of each clarifier for an activated sludge WWTP that treats 12 MGD. The MLSS is 3,500 mg/L, and the recycle sludge rate is 5.0 MGD. Assume an HLR and SLR that are mid-range of the typical values given in Table 6.4. Calculate the area using each guideline, and pick the appropriate area. Specify the number of clarifiers and the diameter (ft) of each. Keep in mind that diameters must be specified in 5-ft increments.

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