Question

Filter aid is used

• A. To increase the rate of filtration
• B. To increase the porosity of the cake
• C. To increase the pressure drop
• D. As a support base for the septum

Hint:

Filter aids help achieve faster filtration and prevent blinding of filter media.

Answer 1

The Correct Option is B

Filter aids such as diatomaceous earth are added to prevent clogging and improve cake permeability.
They form a porous pre-layer, increasing porosity and flow during filtration.