Evaluation of food safety along the cold chain by deterministic and stochastic approaches
Laguerre, O. ; Hoang, H.M. ; Flick, D. ; Derens, E. ; Alvarez, G.
Type de document
Actes de congrès
Affiliation de l'auteur
CEMAGREF ANTONY UR GPAN FRA ; CEMAGREF ANTONY UR GPAN FRA ; AGROPARISTECH INRA UMR 1145 MASSY FRA ; CEMAGREF ANTONY UR GPAN FRA ; CEMAGREF ANTONY UR GPAN FRA
Résumé / Abstract
Several surveys have shown temperature abuses in the last 3 steps of the cold chain: display cabinet, transport by consumer and domestic refrigerator. To evaluate the food safety, this work was carried out to predict the product temperature and microbial load evolutions in these steps. Deterministic models were used to take into account the heat transfer by convection, conduction and radiation inside the equipments. They were combined with stochastic models to take into account different sources of randomness: ambient temperature, thermos tat setting, product position and residence time in the equipments etc. Distribution laws were developed to fit the survey data of these random parameters. The sampling values were used as input parameters of the heat transfer model to predict the temperature evolutions of a large number of products along the cold chain. Then, these temperature evolutions were applied to a growth model of Listeria monocytogenes to predict the bacterial contamination.
Symposium Franco-Thai, 01/02/2012 - 03/02/2012, Bangkok, THA