The influence of impurities on calcium phosphate floc structure and size in sugar solutions


Autoria(s): Thai, Caroline C.D.; Moghaddam, Lalehvash; Doherty, William O.S.
Data(s)

04/03/2016

Resumo

Settling, dewatering and filtration of flocs are important steps in industry to remove solids and improve subsequent processing. The influence of non-sucrose impurities (Ca2+, Mg2+, phosphate and aconitic acid) on calcium phosphate floc structure (scattering exponent, Sf), size and shape were examined in synthetic and authentic sugar juices using X-ray diffraction techniques. In synthetic juices, Sf decreases with increasing phosphate concentration to values where loosely bound and branched flocs are formed for effective trapping and removal of impurities. Although, Sf did not change with increasing aconitic acid concentration, the floc size significantly decreased reducing the ability of the flocs to remove impurities. In authentic juices, the flocs structures were marginally affected by increasing proportions of non-sucrose impurities. However, optical microscopy indicated the formation of well-formed macro-floc network structures in sugar cane juices containing lower proportions of non-sucrose impurities. These structures are better placed to remove suspended colloidal solids.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/94473/

Publicador

Elsevier

Relação

http://eprints.qut.edu.au/94473/3/94473.pdf

DOI:10.1016/j.jfoodeng.2016.02.019

Thai, Caroline C.D., Moghaddam, Lalehvash, & Doherty, William O.S. (2016) The influence of impurities on calcium phosphate floc structure and size in sugar solutions. Journal of Food Engineering, 181, pp. 20-27.

Direitos

Copyright 2016 Elsevier

Licensed under the Creative Commons Attribution; Non-Commercial; No-Derivatives 4.0 International. DOI: 10.1016/j.jfoodeng.2016.02.019

Fonte

School of Chemistry, Physics & Mechanical Engineering; Centre for Tropical Crops and Biocommodities; Institute for Future Environments; Science & Engineering Faculty

Palavras-Chave #Sugar cane #calcium phosphate #floc #floc structure #fractal dimension
Tipo

Journal Article