Method for killing microorganisms in liquids

Details Method for killing microorganisms in liquids Method for killing microorganisms in liquids

1997-04-07

1998-11-17

Yeung, George

Food or edible material: processes, compositions, and products

Direct application of electrical or wave energy to food...

422 20, 426238, 426522, A23C 300, A23L 300

Patent

active

058373039

ABSTRACT:
An improved method for treating liquid foodstuffs to prolong their shelf life wherein the liquid is exposed to intense agitation, preferably through sonication, to disrupt cell walls and membranes of any microorganisms present in the liquid. The liquid is either simultaneously or subsequently exposed to an electrical field. The intense agitation disrupts the cell walls and membranes of the microorganisms so that an electrical current can be introduced through any openings formed in the cell walls and membranes and through their intracellular matrices to kill the microorganisms. It is preferable to expose the liquids to torsional forces so that any microorganisms will be rotating through the stationary electrical field. As a result any openings in the cell walls and membranes of the microorganisms will at some point become aligned with the electrical field so that current can be introduced within the cells to destroy the microorganisms.

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patent: 3352693 (1967-11-01), Berk
patent: 4946702 (1990-08-01), Stipp et al.
patent: 5026564 (1991-06-01), Hayden et al.
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patent: 5232726 (1993-08-01), Clark et al.
patent: 5514391 (1996-05-01), Bushnell et al.
Dialog Data Base, File 434, Dialog Acc. No. 14971860, Abstracting "Critical Reviews In Food Science And Nutrition", V36, N6, pp. 603-627, 1996.
Dialog Data Base, File 351, Dialog Acc. No. 002266614, Abstracting Soviet patent 634733, Nov. 30, 1978.

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