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    Sonocrystallisation of lactose in concentrated whey

    Access Status
    Fulltext not available
    Authors
    Zisu, B.
    Sciberras, M.
    Jayasena, Vijay
    Weeks, M.
    Palmer, M.
    Dincer, T.
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Zisu, B. and Sciberras, M. and Jayasena, V. and Weeks, M. and Palmer, M. and Dincer, T. 2014. Sonocrystallisation of lactose in concentrated whey. Ultrasonics Sonochemistry. 21 (6): pp. 2117-2121.
    Source Title
    Ultrasonics Sonochemistry
    DOI
    10.1016/j.ultsonch.2014.03.031
    ISSN
    1350-4177
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/29738
    Collection
    • Curtin Research Publications
    Abstract

    Whey concentrated to 32% lactose was sonicated at 30 °C in a non-contact approach at flow rates of up to 12 L/min. Applied energy density varied from 3 to 16 J/mL at a frequency of 20 kHz. Sonication of whey initiated the rapid formation of a large number of lactose crystals in response to acoustic cavitation which increased the rate of crystallisation. The rate of sonocrystallisation was greater than stirring for approximately 180 min but slowed down between 120 and 180 min as the metastable limit was reached. A second treatment with ultrasound at 120 min delivering an applied energy density of 4 J/mL stimulated further nuclei formation and the rate of crystallisation was maintained for >300 min. Yield on the other hand was limited by the solubility of lactose and could not be improved. The crystal size distribution was narrower than that with stirring and the overall crystal size was smaller. © 2014 Elsevier B.V. All rights reserved.

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