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Mathematical modeling and experimental validation of continuous pasteurization of liquid food with plate heat exchangers

Grant number: 06/01628-0
Support Opportunities:Regular Research Grants
Duration: September 01, 2006 - August 31, 2009
Field of knowledge:Agronomical Sciences - Food Science and Technology - Food Science
Principal Investigator:Jorge Andrey Wilhelms Gut
Grantee:Jorge Andrey Wilhelms Gut
Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil


It is proposed the development of a mathematical model for the pasteurization of liquid food using plate heat exchangers, targeting the determination of the complete temperature distribution of the product and the evaluation of the process effect. The objective of this simulation tool is to support the project and design of continuous pasteurization processes. Sensorial and nutritional quality losses are thus avoided, as well as unnecessary costs with heating and cooling, originated from the over-processing (typical of pasteurization units because of the simplified assumptions considered for their design). The model will be experimentally validated for the HTST pasteurization of bovine milk through residence time distribution tests for all process steps (heating, cooling, regeneration and retention), as well as pasteurization tests with chemical indicators (enzymes alkaline phosphatase and lactoperoxidase) for evaluating the effect of the process on the product. Experimental and simulation results are to be confronted for minimization of deviations and model adjustment. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
AGUIAR, HELENA DE FAZIO; YAMASHITA, ANDRE SHIGUEO; WILHELMS GUT, JORGE ANDREY. Development of enzymic time-temperature integrators with rapid detection for evaluation of continuous HTST pasteurization processes. LWT-FOOD SCIENCE AND TECHNOLOGY, v. 47, n. 1, p. 110-116, . (06/01628-0)
GUTIERREZ, CAROLA G. C. C.; DIAS, EDUARDO F. T. S.; GUT, JORGE A. W.. Investigation of the residence time distribution in a plate heat exchanger with series and parallel arrangements using a non-ideal tracer detection technique. APPLIED THERMAL ENGINEERING, v. 31, n. 10, p. 1725-1733, . (06/01628-0)
GUTIERREZ, CAROLA G. C. C.; DIAS, EDUARDO F. T. S.; GUT, JORGE A. W.. Residence time distribution in holding tubes using generalized convection model and numerical convolution for non-ideal tracer detection. Journal of Food Engineering, v. 98, n. 2, p. 248-256, . (06/01628-0)
FORTES, NILO H. M.; GUT, JORGE A. W.. Correction of residence time distribution measurements for short holding times in pasteurization processes. INTERNATIONAL JOURNAL OF FOOD ENGINEERING, v. 17, n. 1, p. 11-26, . (13/07914-8, 06/01628-0)

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