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How to Determine Cake Resistance in Filtration Systems

Purpose of this post is to determine cake resistance in filtration systems, as a function of operating pressure of filter. Before we jump into the calculation, let us learn first several basic calculation in filtration system.

As filtration proceeds, a porous cake of solid particles is built up on a porous medium, usually a supported cloth. The flow of liquid is laminar because of the fineness of the pores. Therefore, the following equation represented the phenomena:

\(Q = \frac{{dV}}{{dt}} = \frac{{A\Delta P}}{{\mu R}}\)

The resistance is made up of filter cloth Rf and that of cake Rc which may be assumed proportional to the weight of the cake. Read More