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Heat Exchanger Fouling and Cleaning VII
July 1-6, 2007 - Tomar, Portugal
| Editors: |
Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada |
The articles for these proceedings are peer-reviewed.
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THE SCIENCE OF CLEANING OF DAIRY FOULING LAYERS
R. Mercadé-Prieto,, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
W.R. Paterson, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
D.I. Wilson, Dept. of Chemical Engineering, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK
ABSTRACT:
The science underlying the removal of dairy fouling
layers, and particularly the dissolution of proteinaceous
deposits in alkaline solution, is relatively poorly
understood even though this is a critical feature of many
cleaning-in-place operations. We report key results from
a series of investigations on heat-induced gels of β-
lactoglobulin, the primary whey protein component in
milk and whey foulant. These model systems were used
to elucidate the reaction behaviour of gels and aggregates
whereby the proteinaceous material is converted to a
softer, swollen form that can then be removed by fluid
shear or diffusion. We show that several features, such as
the occurrence of an optimal pH for cleaning, can be
related by analogy to the behaviour of synthetic
polyelectrolyte polymers. The structure and history of the
foulant, pH, ionic strength and salt concentration in the
cleaning solution are all shown to be important factors in
the chemistry of inter- and intra-molecular interactions
explaining why it has been difficult to generalise about
the mechanisms involved and to write simple models of
their kinetics.
R. Mercadé-Prieto,; W.R. Paterson; and D.I. Wilson, "THE SCIENCE OF CLEANING OF DAIRY FOULING LAYERS" in "Heat Exchanger Fouling and Cleaning VII", Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada
Eds, ECI
Symposium Series, Volume RP5 (2007). http://services.bepress.com/eci/heatexchanger2007/17
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