Combined application of centrifugal and static pressure field has shown improved results for filtration rate and dewatering performance in various applications. Especially for compressible filter cakes, hyperbaric centrifugal filtration promises better results than separation in conventional filter centrifuges. In a beaker centrifuge filtration experiments were carried out up to C-values of 3000. A static pressure field with a maximum pressure up to 5 bar was superimposed in the centrifuge (hyperbaric centrifugal filtration). Visualisation techniques allowed the observation of the filter cake compression during the filtration experiment. Under various C-value and static pressure conditions filtration experiments have been carried out using suspension systems with solids of distinct compressibility. The filtrate flow versus time was monitored. Complementary, the mechanical filter cake properties and filter cake structures were analysed under different process conditions. Relationships between filtrate flow rate and filter cake properties (mechanical behaviour, structure) are described. (C) 2004 Elsevier B.V. All rights reserved.