Depth Filtration Product Guide
What is 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.
is when a particle is physically restricted by means of interception, sieving or bridging.
refers to the adhesion of particles to the filter media. This phenomenon occurs due to the electrokinetic properties and hydrophobic characteristics of fibres; also known as Van der Waals force or electrostatic force.
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 during its journey, decreasing sizes of all particles become trapped and adsorbed as the matrix of fibres becomes tighter.