DEPTH FILTRATION

Depth filtration, as it suggests, is the process of filtering through a depth of media. To obtain retention of particles in the depth media, two events occur known as mechanical and adsorbtive retention. In general, depth filters are manufactured with a relatively thick media that requires the fluid to travel through a tortuous path as it proceeds from the upstream surface of the filter to the downstream surface. As the fluid twists and turns durings its journey, decreasing sizes of all particles become trapped and adsorbed as the matrix of fibres becomes tighter.