Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are use – McqOptions

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1.	Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is_______________?
A.	Added to the feed slurry
B.	Pre-coated on the filter medium prior to filtration
C.	Separated from the cake by dissolving solids or by burning it off
D.	All A, B. & C.
Answer» E.

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