Determination of ultrafiltration resistance using series resistance model in inulin purification from red fruit (Pandanus conoideus L.) pedicel extract

Abstract

The crude inulin extracted from red fruit pedicels using hydrodynamic cavitation contained inulin and other impurities such as reducing sugars and proteins. Membrane technology is an alternative technology for separating inulin from its impurity. This study aimed to purify the inulin extract and to evaluate the membrane resistance using a series of Membrane Titania (5 × 103 Da pore diameter) with 1-2.6 bar pressure variation on ultrafiltration. The steady-state on the inulin crude filtration at 0 scales and 1 bar occurred at the 25th minutes with a flux value 3.06 L m-2 h-1. The optimum pressure for the transmembrane was at 2.2 bar with permeate flux of 7.75 L m-2 h-1. The amount of flux in the membrane filtration was determined by the resistance of internal membrane, fouling, and polarization.