Rapid filtration measurement of dewatering design and optimization parameters

To characterize and optimize the compressive dewatering of suspensions, rap idly, determinable material parameters are required. A mathematical framewo rk, exists for characterization of dewatering using three parameters: the c ompressive yield stress P-y(phi), the hindered settling function r(phi), an d a solids diffusivity D(phi). A new variation on traditional constant pres sure, batch filtration tests is described along with a computer-controlled filtration apparatus that enables complete characterization of a suspension with respect to dewatering in a matter of hours. The testing methods are v alidated experimentally on flocculated zirconia suspensions along with calc ulation of the material dewatering parameters. Application of the calculate d parameters to modeling of a real filtration test shows excellent agreemen t. Practical implications of the modeling are also discussed.