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A model heat exchange apparatus for the investigation of fouling of stainless steel surfaces by milk II. Deposition of fouling material at 140 °C, its adhesion and depth profiling

Published online by Cambridge University Press:  01 June 2009

Carole L. Foster  and
Margaret L. Green
Carole L. Foster
Affiliation:
AFRC Institute of Food Research, Reading Laboratory, (University of Reading), Shinfield, Reading RG2 9AT, UK
Margaret L. Green
Affiliation:
AFRC Institute of Food Research, Reading Laboratory, (University of Reading), Shinfield, Reading RG2 9AT, UK
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Summary

Formation and adhesion of fouling deposit during heating of milk at a stainless steel surface were studied separately using a model apparatus. The amount of deposit and proportion of minerals present increased with increase in surface temperature. At 140 °C, the amount of deposit formed increased linearly with heating time, becoming more uneven in appearance. The variations of deposit formation at 140 °C with pH of the milk, with fat removal and with preheating were similar to those observed in the final heating section of continuous UHT plants. Deposits containing a higher proportion of protein were easier to remove. The remaining inner layer had a smoother appearance and contained a higher proportion of minerals than the original deposit. Depth profiling, using secondary ion mass spectrometry, showed that protein was concentrated on the outside of deposits with calcium phosphate being concentrated closest to the steel surface.

Type
Original Articles
Information
Journal of Dairy Research , Volume 57 , Issue 3 , August 1990 , pp. 339 - 348
Copyright
Copyright © Proprietors of Journal of Dairy Research 1990

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References

REFERENCES

Burton, H. 1968 Reviews of the progress of Dairy Science, Section G. Deposits from whole milk in heat treatment plant – a review and discussion. Journal of Dairy Research 35 317–330CrossRefGoogle Scholar
Burton, H. 1988 Ultra-High-Temperature Processing of Milk and Milk Products pp. 292–309. London: ElsevierGoogle Scholar
Britten, M., Green, M. L., Boulet, M. & Paquin, P. 1988 Deposit formation on heated surfaces: effect of interface energetics. Journal of Dairy Research 55 551–562CrossRefGoogle Scholar
Chaplin, L. C. & Lyster, R. L. J. 1988 Effect of temperature on the pH of skim milk. Journal of Dairy Research 55 277–280CrossRefGoogle Scholar
Chughtai, A., Marshall, R. & Nancollas, G. H. 1968 Complexes in calcium phosphate solutions. Journal of Physical Chemistry 72 208–211CrossRefGoogle ScholarPubMed
Foster, C. L., Britten, M. & Green, M. L. 1989 A model heat-exchange apparatus for the investigation of fouling of stainless steel surfaces by milk. I. Deposit formation at 100 °C. Journal of Dairy Research 56 201–209CrossRefGoogle Scholar
Fryer, P. J. 1989 The uses of fouling models in the design of food process plant. Journal of the Society of Dairy Technology 42 23–29CrossRefGoogle Scholar
Grandison, A. S. 1988 UHT processing of milk: seasonal variation in deposit formation in heat exchangers. Journal of the Society of Dairy Technology 41 43–49CrossRefGoogle Scholar
Green, M. L., Foster, C. L. & Britten, M. 1989 Formation and adhesion of deposit to heated surfaces in contact with milk. In Fouling in Process Plant pp. 183–196 (Ed. Pritchard, A. M.). London: Institute of Corrosion Science and TechnologyGoogle Scholar
Heertje, I., Visser, J. & Smits, P. 1985 Structure formation in acid milk gels. Food Microstructure 4 267–277Google Scholar
Holt, C., Dalgleish, D. G. & Jenness, R. 1981 Calculation of the ion equilibria in milk diffusate and comparison with experiment. Analytical Biochemistry 113 154–163CrossRefGoogle ScholarPubMed
Lalande, M., Tissier, J-P. & Corrieu, G. 1984 Fouling of a plate heat exchanger used in ultra-high-temperature sterilization of milk. Journal of Dairy Research 51 557–568CrossRefGoogle Scholar
Lalande, M., Tissier, J-P. & Corrieu, G. 1985 Fouling of heat transfer surfaces related to β-lactoglobulin denaturation during heat processing of milk. Biotechnology Progress 1 131–139CrossRefGoogle ScholarPubMed
Lyster, R. L. J. 1981 Calculation by computer of individual concentrations in a simulated milk salt solution. II. An extension to the previous model. Journal of Dairy Research 48 85–89CrossRefGoogle Scholar
Pouliot, Y., Boulet, M. & Paquin, P. 1989 Observations on the heat-induced salt balance changes in milk. I. Effect of heating time between 4 and 90 °C. Journal of Dairy Research 56 185–192CrossRefGoogle Scholar
Sandu, C. & Lund, D. 1985 Fouling of heating surfaces - chemical reaction fouling due to milk. In Fouling and Cleaning in Food Processing pp. 122–167 (Eds Lund, D. B., Plett, E. and Sandu, C.) Madison, WI: University of WisconsinGoogle Scholar
Skudder, P. J., Brooker, B. E., Bonsey, A. D. & Alvarez-Guerrero, N. R. 1986 Effect of pH on the formation of deposit from milk on heated surfaces during ultra high temperature processing. Journal of Dairy Research 53 75–87CrossRefGoogle Scholar
Tissier, J-P. & Lalande, M. 1986 Experimental device and methods for studying milk deposit formation on heat exchange surfaces. Biotechnology Progress 2 218–229CrossRefGoogle ScholarPubMed