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- Title
Membrane fouling during the fractionation of phytosterols isolated from orange juice.
- Authors
Abd-Razak, Nurul Hainiza; Chew, Y. M. John; Bird, Michael R.
- Abstract
The aim of this study is to isolate phytosterol compounds from orange juice using ultrafiltration (UF) flat sheet membranes (supplied by Alfa Laval) with molecular weight cut-off (MWCO) values of 10 kDa fabricated from regenerated cellulose, polyethersulphone and fluoropolymer. A cross-flow filtration rig operated at a transmembrane pressure (TMP) of 0.5-2 bar, and a cross-flow velocity (CFV) of 0.5-1.5 m s-1. Membrane rejection towards total phytosterols, proteins, sugars were determined along with antioxidant activity. The regenerated cellulose membrane displayed the highest permeate flux (a pseudo steady-state value of 22 L m-2 h-1), with a higher fouling index (75%) and a good separation efficiency of phytosterols (32% rejection towards phytosterols) from orange juice. Although the yield of phytosterols was relatively low (40 mg/L), there is a great potential to optimise the filtration process to produce commercially relevant amount of phytosterols. All membranes investigated displayed cleaning efficiencies of >95%.
- Subjects
PHYTOSTEROLS; ORANGE juice; MOLECULAR weights; CELLULOSE; FLUOROPOLYMERS
- Publication
Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C, 2019, Vol 113, p10
- ISSN
0960-3085
- Publication type
Article
- DOI
10.1016/j.fbp.2018.09.005