The study was carried out mainly to investigate the filtration of the diluted crude palm oil slurry at positive pressure. The study covers the effect ofpressure and temperature on the filtrate flowrate and cake composition, cakeproeprty, and quality of filtrate. Investigations on the property of the slurry and characterisation of non-oily solids particles were alaso carried out. Filtration study was carried out using two filters: i) A labscale pressurefilter with dimension of 12.4 cmIDx4cm thickness. The filter media used waspolyester multifilament twill weaves. ii) A pilot scale filter press whichconsites of 3 plates of 50 cm x 50cm x 6 cm. The filter media used was needle felt polyester. Filtration tests were carried out in the laboratory whilstthe pilot scale trials were done on site in a palm oil mill.From the filtration tests using the labscale pressure filter, optimum flowcaflowrate was found at 2 bar and 90'C for the pressure rangae for 1 bar to 4bar and temperature range from 60'C to 90'C. Both filtration studies showed that the filtration flux dropped rapidly within 50 minutes. The flowrate of the continuoys phase in the slurry (water) was higher than the flowrate of the dispersed phase (oil). The porosity at different depth of the cake was found to be almost constant and was indicated by the hydraulic pressure distribution in the cake was found to be almost independent of time. The cake washighly compressible at 60'C where n>1. Density and viscosity of filtrate