Process control using Sludge Volume Index (SVI)

Process control using Sludge Volume Index (SVI)
Various containers are used for settleability tests. From left: 1.4-liter settleometer, 2-liter settleometer, 1-liter beaker.

In a previous article (“What the Heck is SVI?”), I discussed sludge volume index (SVI) and its value as a process control tool. In this installment, I want to answer a few questions I received from readers, clarify the formula result, and discuss SVI a little more in depth. 


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