SIMULATION OF THE BUILDUP OF A FILTER CAKE

The aim of this work was to develop a computer program describing the build-up of a filter cake. The program is based on a model presented b y Wakeman in 1981, but which has been modified slightly. The program d eveloped here can be used to compute the cake height, the pressure pro file and the local specific filtration resistance. The calculated resu lt from this program was compared with experimental data (local pressu re, cake height and semi-local specific filtration resistance). It was found that there was excellent agreement between the calculated and m easured local pressures. Furthermore, the cake height can be estimated with a high level of confidence. The calculated specific filtration r esistance was in the same order of magnitude as the measured data. How ever, the model underestimates the resistance in the region closest to the filter cloth, and overestimates the resistance in the region clos est to the surface of the filter cake.