Mechanisms for the ultrasonic enhancement of dairy whey ultrafiltration

Full text for this resource is not available from the Research Repository.

Muthukumaran, Shobha, Kentish, Sandra E, Ashokkumar, Muthupandian and Stevens, Geoffrey W (2005) Mechanisms for the ultrasonic enhancement of dairy whey ultrafiltration. Journal of Membrane Science, 258 (1-2). pp. 106-114. ISSN 0376-7388

Abstract

Low frequency ultrasound has been used to facilitate cross-flow ultrafiltration of dairy whey solutions. Experimental results show that ultrasonic irradiation at low power levels can significantly enhance the permeate flux with an enhancement factor of between 1.2 and 1.7. The use of turbulence promoters (spacers) in combination with ultrasound can lead to a doubling in the permeate flux. The application of a combined pore blockage/cake resistance model to the observed experimental data suggests that the use of ultrasound acts to lower the compressibility of both the initial protein deposit and the growing cake. Conversely, the pore blockage parameter is not significantly affected. The use of a gel polarization model shows that the ultrasonic irradiation increases the mass transfer coefficient within the concentration polarization layer. Electron microscopy results showed no evidence that the ultrasonic irradiation altered the membrane integrity. HPLC analysis of the whey proteins in the feed solution before and after sonication showed that the concentration profile of the whey proteins was also not affected by the sonication process.

Dimensions Badge

Altmetric Badge

Additional Information

Online ISSN: 1873-3123

Item type Article
URI https://vuir.vu.edu.au/id/eprint/8509
DOI https://doi.org/10.1016/j.memsci.2005.03.001
Official URL http://www.sciencedirect.com/science/article/pii/S...
Subjects Historical > FOR Classification > 0908 Food Sciences
Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Keywords ResPubID19487. fouling, ultrasound, spacers, modelling, dairy whey, whey proteins, ultrafiltration, ultrasonic irradation
Citations in Scopus 131 - View on Scopus
Download/View statistics View download statistics for this item

Search Google Scholar

Repository staff login