Method for treating products by high voltage pulses

A - Human Necessities – 23 – L

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Details

A23L 3/32 (2006.01) A23B 5/015 (2006.01) A23L 3/005 (2006.01)

Patent

CA 2364717

The invention relates to a method for treating products, which may contain cellular material of eukaryotic and/or prokaryotic origin and in particular micro-organisms, by bringing the product in device comprising two electrodes connected to an electronic circuit such that in said device and in said product a pulsating electrical field is created, characterised by the rise time of each imposed voltage pulse which is less than the electronic relaxation time of the product. Preferably the rising edge of each cycle starts within the relaxation time of the product and even more preferably each electrical field pulse has a duration shorter than the relaxation time of the product. Dependent on the type of product and the types of micro-organisms contained in the product, the maximum fieldstrength of each pulse, the repetition frequency and the number of cycles in the treatment are selected such that the target micro-organisms and/or spores are functionally inactivated leading to a shelf stable, microbiologically safe product.

L'invention concerne un procédé de traitement de produits, lesquels peuvent contenir un matériau cellulaire d'origine eucaryote et/ou procaryote et notamment des micro-organismes, ce procédé consistant à placer le produit dans un dispositif comportant deux électrodes connectées à un circuit électronique, de manière à créer, dans ce dispositif et dans le produit, un champ électrique pulsé caractérisé par la durée d'établissement de chaque impulsion de la tension imposée, laquelle est inférieure au temps de relaxation électronique du produit. De préférence, le flanc montant de chaque impulsion démarre pendant le temps de relaxation du produit, et plus préférablement, chaque impulsion de champ électrique possède une durée plus courte que le temps de relaxation du produit. En fonction du type de produit et des types de micro-organismes contenus dans le produit, on choisit la force de champ maximale de chaque impulsion, la fréquence de répétition et le nombre d'impulsions de traitement, de façon que les micro-organismes cibles et/ou spores soient inactivés de manière fonctionnelle pour être convertis en un produit sûr sur le plan microbiologique, et stable pendant sa durée de conservation.

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