Activated Sludge Design Calculator

Wastewater Sewage Treatment

Solving for sludge volume index
sludge volume index


sludge volume after 30 minutes of settling (SV)
suspended solids concentration (SS)


sludge volume after 30 minutes of settling (SV)
= 0
= 0
suspended solids concentration (SS)
= 0
= 0


sludge volume index (SVI)

Other Units:

Change Equation
Select to solve for a different unknown
sludge volume indexsludge volume index
sludge volumesludge volume after 30 minutes of settling
suspended solids concentrationsuspended solids concentration

References - Books:
1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.
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