Flocculation and sedimentation of cane sugar juice particles with cationic homo- and copolymers

Doherty, William O.S., Fellows, Christopher M., Gorjian, Sargon, Senogles, Ernest, & Cheung, Wai Hung (2003) Flocculation and sedimentation of cane sugar juice particles with cationic homo- and copolymers. Journal of Applied Polymer Science, 90(1), 316 -325.

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Abstract

Rapid flocculation and sedimentation of suspended particles in primary cane sugar juice is achieved using a high molecular weight anionic polymer flocculant. This work reports on efforts to enhance the performance of an anionic flocculant by the addition of cationic polymers. Homopolymers of poly(trimethylammonium ethyl methacrylate chloride) (TMAEMAC) and cationic copolymers of poly(trimethylammonium ethyl acrylate chloride) (TMAEAC) and acrylamide were synthesized and their performance, to enhance the flocculation and sedimentation of cane sugar juice particles, was evaluated by turbidity and settling rate measurements. The charge-patch mechanism best explains the performance of the homopolymers, whereas the action of the copolymers is attributed to the bridging mechanism. The results of this work indicate that the copolymers are more effective than the homopolymers to aid flocculation and sedimentation of the cane sugar juice particles, and that the best-performing polymers are those that act by the bridging mechanism. Addition of increased amounts of anionic flocculant did not confer an improvement, suggesting that the cationic bridging flocculant targets a different population of particles that is largely responsible for the residual turbidity.

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16 citations in Scopus
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13 citations in Web of Science®

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ID Code: 11145
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: polyelectrolytes • cane sugar juice • flocculation • colloids • water, soluble polymers
DOI: 10.1002/app.12791
ISSN: 0021-8995
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Current > QUT Faculties and Divisions > Division of Research and Commercialisation
Copyright Owner: Copyright 2003 John Wiley & Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 07 Dec 2007 00:00
Last Modified: 04 Mar 2014 23:57

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