Method for treating products by high voltage pulses

E.J.G.D. Winter (Inventor), H.C. Mastwijk (Inventor), P.V. Bartels (Inventor)

    Research output: Patent


    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, characterized 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.
    Original languageEnglish
    Patent numberWO0056179
    Priority date24/03/99
    Publication statusPublished - 28 Sep 2000


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