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Insights to the Clarification of Sugar Cane Juice Expressed from Sugar Cane Stalk and Trash

Thai, Caroline C.D., Bakir, Hakan, & Doherty, Willam O.S. (2012) Insights to the Clarification of Sugar Cane Juice Expressed from Sugar Cane Stalk and Trash. Journal of Agricultural and Food Chemistry, 60(11), pp. 2916-2923.

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    Abstract

    Processing of juice expressed from green sugar cane containing all the trash (i.e., tops and leaves, the nonstalk component) of the sugar cane plant during sugar manufacture has been reported to lead to poor clarified juice (CJ) quality. Studies of different liming techniques have been conducted to identify which liming technique gives the best clarification performance from juice expressed from green cane containing half of all trash extracted (GE). Results have shown that lime saccharate addition to juice at 76 °C either continuous or batchwise gives satisfactory settling rates of calcium phosphate flocs(50−70 cm/min) and CJ with low turbidity and minimal amounts of mineral constituents. Surprisingly, the addition of phosphoric acid (≤300 mg/kg as P2O5), prior to liming to reduce juice turbidity (≤80%), increased the Mg (≤101%) and Si(≤148%) contents particularly for clarified GE juices. The increase was not proportional with increasing phosphoric acid dose. The nature of the flocs formed, including the zeta potential of the particles by the different liming techniques, has been used to account for the differences in clarification performance. Differences between the qualities of the CJ obtained with GE juice and that of burnt cane juices with all trash extracted (BE) have been discussed to provide further insights into GE processing.

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    4 citations in Scopus
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    2 citations in Web of Science®

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    ID Code: 50398
    Item Type: Journal Article
    Keywords: Trash, Clarification, Sugar Cane Juice, Flocculation, Sugar Manufacture, Calcium Phosphate
    DOI: 10.1021/jf204998b
    ISSN: 0021-8561
    Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Separation Science (030108)
    Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > MACROMOLECULAR AND MATERIALS CHEMISTRY (030300) > Chemical Characterisation of Materials (030301)
    Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > OTHER CHEMICAL SCIENCES (039900) > Industrial Chemistry (039903)
    Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
    Current > Research Centres > Centre for Tropical Crops and Biocommodities
    Current > QUT Faculties and Divisions > Science & Engineering Faculty
    Copyright Owner: Copyright 2012 American Chemical Society
    Copyright Statement: This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.
    Deposited On: 22 May 2012 12:53
    Last Modified: 07 Nov 2014 08:35

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