Question: 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
Options
A : added to the feed slurry.
B : precoated 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'.
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