Mechanical Operations
Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an

Bag filter
Air filter
Hydrocyclones
Venturi scrubber

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Mechanical Operations
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

Precoated on the filter medium prior to filtration
All of these
Separated from the cake by dissolving solids or by burning it off
Added to the feed slurry

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