ABSTRACT
Capacity, in dead-end filtration, as opposed to cross-flow filtration, which we discussed in Chapter 12, refers to the volume of a specific stream or, more specifically, the amount of solids fed to a unit of area of a filter medium before the medium suffers a significant loss in permeability. Many investigators studying constant-pressure filtration make linear/linear plots of flow rate vs. time or of cumulative volume filtered vs. time. In doing so, they miss seeing what kind of empirical filtration law applies and what kind of mathematical expression describes the situation. If they had made such plots on log/log paper, where the shape of the curve is not dependent on the units of volume and time employed, they could have readily seen which law applied.
