ABSTRACT
In cross-flow filtration, the feed stream sweeps across the face of the filter medium rather than hitting it head on. This arrangement inhibits the accumulation of particles on the medium, thereby increasing its capacity. The simplest kind of cross-flow filtration setup is a column of liquid over a filter medium fitted with stirrer blades close to the upstream face of the medium. Particles that would otherwise settle on the medium are kept suspended in air. Such a device is generally used to test a filter medium, usually a membrane, to be installed in the kind of device schematically described in Figure 12.1. Also, Figure 12.1 shows a portion of an axial cross section of a spiralwound tubular cartridge or module.
