Understanding flocculation properties of soil impurities present in the factory sugarcane supply

Bakir, Cumhur Hakan, Zhang, Zhanying, Zbik, Marek S., Harrison, Mark D., & Doherty, William O.S. (2016) Understanding flocculation properties of soil impurities present in the factory sugarcane supply. Journal of Food Engineering, 189, pp. 55-63.

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Abstract

Soil impurities in sugarcane supplies affect clarification and filtration unit operations in the raw sugar manufacturing process. Juices expressed from the sugarcane plant grown in certain soils display poor clarification and dewatering behaviours. In this study, the salient features of these soils were determined in order to understand why they influence flocculation and settling of juice particles (flocs). The soils were characterized by X-ray powder diffraction, transmission-, transmission x-ray-, and scanning-electron microscopy, and their solution chemistries determined in electrolytes. In general, clay mineral composition, cation exchange capacity, and particle size contributed towards the poor settling characteristics of the soils. Fine particles (i.e., <200 nm) were found in difficult to clarify soil samples and were identified as nano-clays. The structure-building phenomenon of these clays if present in sugar juice are likely to impact on clarification, hindering the juice particles ability to settle despite changing environmental chemistry.

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ID Code: 95976
Item Type: Journal Article
Refereed: Yes
Keywords: Flocculation, Smectite, Soil, Sugarcane juice, Clarification
DOI: 10.1016/j.jfoodeng.2016.05.025
ISSN: 0260-8774
Subjects: 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 > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400) > Water Treatment Processes (090410)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400) > Chemical Engineering not elsewhere classified (090499)
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Facilities: Central Analytical Research Facility
Copyright Owner: Copyright 2016 Elsevier
Copyright Statement: Licensed under the Creative Commons Attribution; Non-Commercial; No-Derivatives 4.0 International. DOI: 10.1016/j.jfoodeng.2016.05.025
Deposited On: 07 Jun 2016 22:34
Last Modified: 09 Jun 2016 23:43

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