Journal article

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

Shobha Muthukumaran, Sandra E Kentish, Geoffrey W Stevens, Muthupandian Ashokkumar, Raymond Mawson

JOURNAL OF FOOD ENGINEERING | ELSEVIER SCI LTD | Published : 2007

Abstract

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 bo..

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