Effect of trash on the coagulation and flocculation of sugarcane juice

Thai, Caroline C.D. & Doherty, William O.S. (2013) Effect of trash on the coagulation and flocculation of sugarcane juice. In Bruce, Robin (Ed.) Proceedings of the Australian Society of Sugar Cane Technologists, Australian Society of Sugar Cane Technologists Ltd, Townsville, Australia.

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Abstract

The processing of juice expressed from whole green sugarcane crop (stalk and trash) leads to poor clarification performance, reduced sugar yield and poor raw sugar quality. The cause of these adverse effects is linked to the disproportionate contribution of impurities from the trash component of the crop. This paper reports on the zeta (ζ) potential, average size distribution (d50) and fractal dimension (Df) of limed juice particles derived from various juice types using laser diffraction and dynamic light scattering techniques. The influence of non-sucrose impurities on the interactive energy contributions between sugarcane juice particles was examined on the basis of Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. Results from these investigations have provided evidence (in terms of particle stability) on why juice particles derived from whole green sugarcane crop are relatively difficult to coagulate (and flocculate). The presence of trash reduces the van der Waals forces of attraction between particles, thereby reducing coagulation and flocculation processes. It is anticipated that further fundamental work will lead to strategies that could be adopted for clarifying juices expressed from whole green sugarcane crop.

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ID Code: 70637
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Whole crop, Trash, Clarification, DLVO Theory, Coagulation, Flocculation
ISSN: 0726–0822
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
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
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2013 Australian Society of Sugar Cane Technologists Ltd
Deposited On: 29 Apr 2014 23:03
Last Modified: 03 May 2014 16:24

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