Enter the wet volume of settled sludge (mL/L) and the dry weight concentration (grams/L) into the Calculator. The calculator will evaluate the Sludge Volume Index. 

Sludge Volume Index Formula

SVI = WV / DWC

Variables:

  • SVI is the Sludge Volume Index ()
  • WV is the wet volume of settled sludge (mL/L)
  • DWC is the dry weight concentration (grams/L)

To calculate Sludge Volume Index, divide the wet volume of settled sludge by the dry weight concentration.

How to Calculate Sludge Volume Index?

The following steps outline how to calculate the Sludge Volume Index.

  1. First, determine the wet volume of settled sludge (mL/L). 
  2. Next, determine the dry weight concentration (grams/L). 
  3. Next, gather the formula from above = SVI = WV / DWC.
  4. Finally, calculate the Sludge Volume Index.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

wet volume of settled sludge (mL/L) = 75

dry weight concentration (grams/L) = 100