This present study aimed at employing MF and UF for the sterilization and clarification of pineapple juice. This was done to study the ef- fect of membrane pore size on the permeate flux, fouling and the quality of clarified juice, including the chemical, physical, microbi- ological and phytochemical properties. Furthermore, the effects of the operating conditions (TMP, cross-flow velocity) on permeate flux and phytochemical properties were also investigated.