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chemical engineering mechanical operations
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): all of them
(C): precoated on the filter medium prior to filtration.
(D): separated from the cake by dissolving solids or by burning it off.
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