The importance of cake compressibility in deadend pressure filtration

Particulate suspensions were pressure filtered over a range of experimental conditions using a well controlled deadend leaf filter system. An electrical resistance measuring technique was incorporated in the system to obtain real time transient solids concentration profiles through the filtering suspensions/cakes. Data are shown which illustrate the use of the apparatus and the effects of some process variables and surface charge on cake compressibility. Three different diameter filter cells were used to obtain scale-up data and the need to correctly incorporate these scale-up parameters in filtration models is highlighted.