Liquid Filtration, Second Edition:Filtration is a unit operation that is designed to separate suspended particles from a fluid media by passing the solution through a porous membrane or medium. As the fluid or suspension is forced through the voids or pores of the filter medium, the solid particles are retained on the medium's surface or, in some cases, on the walls of the pores, while the fluid, which is referred to as the filtrate, passes through.
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