Modelling of hollow-fibre ultrafiltration of skimmilk under mass-transfer limiting conditions
Journal
Journal of Food Engineering
Journal Volume
6
Journal Issue
4
Pages
241-255
Date Issued
1987
Author(s)
Cheryan M.
Abstract
The performance of a commercial hollow-fibre ultrafiltration module processing skimmilk has been studied. The flux displayed a typical asymptotic behaviour with increasing transmembrane pressure, indicative of concentration polarization. In the polarized pressure-independent region, flux was significantly affected by velocity and feed concentration; temperature had a small positive effect. The Leveque and the Grober laminar flow models underpredicted the experimental flux. The model was mofified to include a concentration-dependent diffusivity term and to account for non-Newtonian rheological behaviour at high concentrations. The correlation which best fitted the data was Sh=0¡P087(Re) 0¡P64 (Sc) 0¡P33 . ? 1987.
Type
journal article