Kinetics modeling of alginate alkaline extraction from Laminaria digitata

Type Article
Date 2009-02
Language English
Author(s) Vauchel Peggy1, Le Roux Karine1, Kaas Raymond2, Arhaliass Abdellah3, Baron RegisORCID1, Legrand Jack3
Affiliation(s) 1 : IFREMER, Dept Sci & Tech Alimentaires Marines, F-44311 Nantes 03, France.
2 : IFREMER, Dept Biotechnol Marine, F-44311 Nantes, France.
3 : Univ Nantes, CNRS, GEPEA, F-44602 St Nazaire, France.
Source Bioresource Technology (0960-8524) (Elsevier), 2009-02 , Vol. 100 , N. 3 , P. 1291-1296
DOI 10.1016/j.biortech.2008.03.005
WOS© Times Cited 36
Keyword(s) Model, Laminaria digitata, Alkaline extraction kinetics, Alginate
Abstract Alginates being depolymerized during their alkaline extraction, reducing extraction time could help producing higher rheological quality alginates. The purpose of the present work is to study fresh Laminaria digitata destructuration during alkaline extraction and its link to extraction kinetics. Both alginate extraction yield and mean diameter of algae particles were followed for different values of agitation level and initial size of algae pieces. Results highlighted the existence of a link between extraction yield and algal destructuration. Those elements and the specificity of L. digitata structure have been taken into account to propose a kinetics model based on a fluid-particle reaction with decreasing size particles. The model parameters have been adjusted thanks to acquisition data and its predictive capacity was assessed by validation data. Provided predictions appeared to be relevant and the model structure suitability was confirmed, as extraction yield kinetics specific shape was quite reliably described. (C) 2008 Published by Elsevier Ltd.
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