Development of descriptor tools for the characterisation of Australian sugar mill evaporator scale

Rackemann, Darryn W., Doherty, William O.S., & East, Chris P. (2011) Development of descriptor tools for the characterisation of Australian sugar mill evaporator scale. International Sugar Journal, 113(1348), pp. 282-289.

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Abstract

Cleaning of sugar mill evaporators is an expensive exercise. Identifying the scale components assists in determining which chemical cleaning agents would result in effective evaporator cleaning. The current methods (based on x-ray diffraction techniques, ion exchange/high performance liquid chromatography and thermogravimetry/differential thermal analysis) used for scale characterisation are difficult, time consuming and expensive, and cannot be performed in a conventional analytical laboratory or by mill staff. The present study has examined the use of simple descriptor tests for the characterisation of Australian sugar mill evaporator scales.

Scale samples were obtained from seven Australian sugar mill evaporators by mechanical means. The appearance, texture and colour of the scale were noted before the samples were characterised using x-ray fluorescence and x-ray powder diffraction to determine the compounds present. A number of commercial analytical test kits were used to determine the phosphate and calcium contents of scale samples. Dissolution experiments were carried out on the scale samples with selected cleaning agents to provide relevant information about the effect the cleaning agents have on different evaporator scales.

Results have shown that by simply identifying the colour and the appearance of the scale, the elemental composition and knowing from which effect the scale originates, a prediction of the scale composition can be made. These descriptors and dissolution experiments on scale samples can be used to provide factory staff with an on-site rapid process to predict the most effective chemicals for chemical cleaning of the evaporators.

Impact and interest:

1 citations in Scopus
1 citations in Web of Science®
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ID Code: 70864
Item Type: Journal Article
Refereed: No
Additional Information: Rackemann, Darryn W., Doherty, William O.S., & East, Chris P. (2010) Development of descriptor tools for the characterization of Australian sugar mill evaporator scale. In Hogarth, Mac & Knight, Peter (Eds.) Proceedings of the 27th International Society of Sugar Cane Technologists Congress, Veracruz, Mexico.
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Keywords: chemical cleaning , evaporator, scale composition
ISSN: 0020-8841
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400)
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Informa Agra
Copyright Statement: Copyright contained in any part of this article is owned or and/or controlled by Informa UK Limited No part of the article may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photographic, recorded or otherwise without the prior written permission of Informa UK Limited though you may print or download the article (in whole or in part) for your personal and non-commercial use.
Deposited On: 02 May 2014 00:38
Last Modified: 21 Jun 2017 03:01

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