Relationship between β-lactoglobulin denaturation and fouling mass distribution in a plate heat exchanger
2015
Khaldi, Marwa | Ronse, Gilles | André, Christophe | Blanpain-Avet, Pascal | Bouvier, Laurent | Six, Thierry | Bornaz, Saloua | Croguennec, Thomas | Jeantet, Romain | Delaplace, Guillaume | Unité Matériaux et Transformations - UMR 8207 (UMET) ; Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) | Institut National Agronomique de Tunisie (INAT) | Laboratoire de Génie des Procédés | Ecole Supérieure des Industries Alimentaires de Tunis (ESIAT) | Science et Technologie du Lait et de l'Oeuf (STLO) ; Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST
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Show more [+] Less [-]English. Few investigations have attempted to connect the mechanism of dairy fouling to the chemical reaction of denaturation (unfolding and aggregation) occurring in the bulk. The objective of this study is to contribute to this aspect in order to propose innovative controls to limit fouling deposit formation. Experimental investigations have been carried out to observe the relationship between the deposit mass distribution generated in a plate heat exchanger (PHE) by a whey protein isolate (WPI) mainly composed of β-lactoglobulin (β-Lg) and the ratio between the unfolding and aggregation rate constants. Data analysis showed that: i) β-Lg denaturation is highly dependent on the calcium content, ii) for each fouling solution, irrespective of the imposed temperature profile, the deposit mass in each channel vs the ratio of the unfolding and aggregation rate constants are well correlated. This study demonstrates that both the knowledge of the thermal profile and the β-Lg denaturation rate constants are required in order to predict accurately the deposit distribution along the PHE.
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