Investigating the Effect of Packed Structures on Filter Cake Compressibility

Abstract

Packed beds used in absorption columns have shown to increase filter cake permeability during specific filtration processes. Their effect on filter cake compressibility is evaluated. Different model systems are characterized using dead-end filtration equipment and a modified universal testing machine. Compression experiments are conducted with different packings to assess the systems' response to compressive stress. The structural support of the packings reduces filter cake compressibility for the tested configurations. The extent of this effect depends on packing type, applied pressure, and material compressibility. These results help to understand the advantages of using packed beds as aids for filtration processes and represent a step further in designing tailored packings.