The American Filtration & Separation Society‘s latest addition to its “One-Minute Filtration Article” series discusses two methods for testing the permeability of a filter cake:

  1. Liquid flowing through already formed cake approach
  2. Cake filtration approach

Permeability is a measure of rate of liquid flowing through a porous medium or a particulate filter cake. It is an important characteristic that filter aid manufacturers use in their product specification. Currently in the U.S., there has not been a standard filter aid permeability test method. Companies use their own standards for filter aid product specifications.

To download this “One-Minute Filtration Article,” click here (PDF).