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AAIQ - Asociación Argentina de Ingenieros. Químicos
Home > COMUNICADOS > Premio IChemE 
Importante Premio internacional

Nuestros colegas John Pérez-Calderón, Maria Victoria Santos y Noemi Zaritzky han sido galardonados con el Senior Moulton Medal Award 2021 otorgado por Institution of Chemical Engineers - IChemE.
Realizado en CIDCA (Centro de Investigación y Desarrollo en Criotecnologia de Alimentos- CONICET- UNLP- CIC) y Depto de Ingeniería Química de la Facultad de Ingeniería de la Universidad Nacional de La Plata, el trabajo premiado fue "Processing of pre-cooked frozen Brussels sprouts: Heat transfer modelling as related to enzyme inactivation and quality stability". Publicado en Food and Bioproducts Processing, 2019, 118, 114-129.
El dictamen fue : "A very nice example of classical chemical engineering applied to a complex food problem. In this case, the production of precooked frozen Brussels sprouts. The paper brings together sophisticated modelling with challenging experimental work. It is well written and serves as a reminder of how the principles of heat transfer apply to a wide range of materials. All present at the meeting were unanimously in favour of awarding the Senior Moulton medal to this paper. " | Nota de Premiación |
Informamos que la Dra Ing Noemi Zaritzky es la Presidenta del Comité Científico del WCCE11 que se realizará en Junio de 2022.


Food and Bioproducts Processing 1 1 8 ( 2 0 1 9 ) 114–journal homepage: www.elsevier.com/locate/fbp

Processing of pre-cooked frozen Brussels sprouts:Heat transfer modelling as related to enzymeinactivation and quality stability

John Pérez-Calderóna, María Victoria Santosc, Noemí Zaritzkya,b,aCentro de Investigación y Desarrollo en Criotecnología de Alimentos CIDCA (UNLP-CONICET-CIC), Calle 47 y 116,La Plata, CP 1900, ArgentinabDepto. de Ingeniería Química, Facultad de Ingeniería, Universidad Nacional de La Plata, Calle 1 y 47, CP 1900, LaPlata, ArgentinacInstituto Andino Patagónico de Tecnologías Biológicas y Geoambientales (IPATEC) CONICET Quintral 1250,Bariloche, Argentinaa

 

Abstract : The finite element numerical method was applied to simulate heat transfer processes (heating, cooling and freezing) in irregular domains during the production of precooked frozen Brussels sprouts; the effect of temperature on thermo-physical properties in the partial differential equation, and experimental heat transfer coefficients were considered. During precooking, heat transfer was coupled to the inactivation kinetics of thermo-labile and thermo-resistant fractions of peroxidase.

The temperature distribution, and enzyme activity in the vegetable domain were modeled; these simulations were validated, obtaining a satisfactory agreement between the predicted values and: (i) the experimental time-temperature curves, (ii) the residual enzyme activity of peroxidase measured in the vegetable.

The simulation of the time-temperature curve during the freezing process is a complex non linear problem that requires knowledge of the thermo physical properties changing with temperature. A change of variables based on Enthalpy and Kirchhoff formulations, was adopted for the numerical solution. The effects of precooking times (3,6,10 min) on quality parameters of the frozen vegetable (Browning Index, textural properties, residual peroxidase activity, ascorbic acid content) were measured in the samples after freezing and storage during 4 months at −20ºC. The pre-cooking time was optimized to get acceptable quality parameters avoiding peroxidase reactivation during frozen storage.

 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights res



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WCCE 10

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1 al 5 de Octubre de 2017
Barcelona - España
Página del último
10th World Congress of
Chemical Engineering
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Asociación Argentina de Ingenieros Químicos
Maipú 726 1P of:4 (C1006ACJ)
Ciudad de Buenos Aires - Argentina Tel :TE/FAX +54 11 4326-0089
E-Mail : info@aaiq.org.ar
AAIQ es miembro de las siguientes instituciones:
* Confederación General de Profesionales de la Republica Argentina - CGP
* Confederación Interamericana de Ingenieros Químicos - CIIQ
* Instituto Petroquímico Argentino IPA

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