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Return Sludge Calculator

Calculate return activated sludge flow rate.

Rate of fluid movement through the system.
MGD
Enter the mlss value for this calculation.
mg/L
Proportional relationship between two values.
mg/L
Three-dimensional space occupied (L × W × H for boxes).
mL/g

Results

RAS Ratio:
Calculated ratio between values.
-%
RAS Flow Rate:
Calculated flow rate.
-MGD
Est. Blanket Depth:
Calculated est. blanket depth based on your inputs.
-ft
Reference: AWWA/EPA Standards. Mass balance approach.