The application of ultrasound to dairy ultrafiltration : the influence of operating conditions

Muthukumaran, Shobha, Kentish, Sandra E., Stevens, Geoffrey W., Ashokkumar, Muthupandian and Mawson, Raymond 2007, The application of ultrasound to dairy ultrafiltration : the influence of operating conditions, Journal of food engineering, vol. 81, no. 2, pp. 364-373, doi: 10.1016/j.jfoodeng.2006.11.008.

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Title The application of ultrasound to dairy ultrafiltration : the influence of operating conditions
Author(s) Muthukumaran, Shobha
Kentish, Sandra E.
Stevens, Geoffrey W.
Ashokkumar, Muthupandian
Mawson, Raymond
Journal name Journal of food engineering
Volume number 81
Issue number 2
Start page 364
End page 373
Publisher Elsevier Ltd.
Place of publication Oxford, England
Publication date 2007-07
ISSN 0260-8774
Keyword(s) ultrasound
whey solutions
Summary Work previously presented has shown that ultrasound can be effective in enhancing both the production and cleaning cycles of dairy membrane  processes. In this present work we extend these previous results to consider the effect of ultrasonic frequency and the use of intermittent ultrasound. These results show that the use of continuous low frequency (50 kHz) ultrasound is most effective in both the fouling and cleaning cycles. The application of intermittent high frequency (1 MHz) ultrasound is less effective. At higher transmembrane pressure, high frequency pulsed sonication can indeed lead to a reduction in steady state membrane flux. The benefits of ultrasound arise from a reduction in both concentration polarization and in the resistance provided by the more labile protein deposits that are removed during a water wash. Conversely, the loss of membrane flux when high frequency pulsed sonication is used arises from a significant increase in the more tenacious ‘irreversible’ fouling deposit.
Language eng
DOI 10.1016/j.jfoodeng.2006.11.008
Field of Research 090404 Membrane and Separation Technologies
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2006, Elsevier Ltd
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