Surface pasteurization method

A - Human Necessities – 23 – L

Patent

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A23L 3/00 (2006.01) A23L 3/18 (2006.01) B65B 9/04 (2006.01) B65B 25/06 (2006.01) B65B 55/14 (2006.01)

Patent

CA 2457083

A method for processing a food product involves transporting the food product through a plurality of stations including a loading station, a pasteurization station, and a closing station. The surface of the food product is pasteurized by convectively transferring heat from the pasteurizing medium to the surface of the food product at a rate such that the surface heat transfer coefficient becomes sufficiently higher than the food product conductance coefficient that the surface temperature of the food product is substantially instantaneously elevated above temperatures which are instantly lethal to microbes which may be present. Preferably, steam is condensed on the food product surface in dropwise condensation, and the onset of film condensation is retarded by removing condensate film from such surface.

Une méthode pour le traitement d'un produit alimentaire consiste à transporter le produit alimentaire à travers une pluralité de stations dont une station de chargement, une station de pasteurisation, et une station de clôture. La surface du produit alimentaire est pasteurisée par transfert à convection de chaleur à partir du médium de pasteurisation à la surface du produit alimentaire à un taux tel que le coefficient de transfert de chaleur à la surface devient suffisamment plus élevé que le coefficient de conductibilité des produits alimentaires et que la température de surface du produit alimentaire est considérablement et instantanément augmentée au-dessus des températures qui sont instantanément mortelles pour les microbes qui peuvent être présents. De préférence, de la vapeur se condense sur la surface du produit alimentaire dans une condensation goutte à goutte, et l'apparition de la condensation en film est retardée par la suppression du film de condensat sur la surface.

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