Sterilisation of liquids in hermetically closed vessels

A closed container, liquid technology, applied in the preparation of alcoholic beverages, the preservation of human or animal bodies, and disinfection, etc., can solve the problems of reduced creep resistance and slow sterilization methods.

Active Publication Date: 2010-03-17
CELLO HOLDINGS LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This liquid is also used to heat the contents of the container, making the method of sterilization relatively slow, with adverse consequences for changes in the properties of the supply in the container
Such a method is neither intended nor suitable for sterilizing bottles made of PET or containers made of other plastic materials whose creep resistance is greatly reduced at conventional heat pasteurization temperatures

Method used

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  • Sterilisation of liquids in hermetically closed vessels
  • Sterilisation of liquids in hermetically closed vessels
  • Sterilisation of liquids in hermetically closed vessels

Examples

Experimental program
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Embodiment

[0164] 1. Decontamination of sealed 0.5 L PET bottles filled with freshly squeezed orange juice and infected with the "Byssochlamysnivea" microorganism. exist image 3 processing on devices of the type indicated in:

[0165] ◎Initial concentration of microorganisms: 3.6-4.2×10 5 a / mL;

[0166] ◎The amount of bottles processed in each cycle: 10;

[0167] ◎Initial temperature: 20℃;

[0168] ◎Processing period: 3s (through horizontal pipeline);

[0169] ◎Heating: 1GHz microwave with a power of 180kW (35°C / s and 45kW (9°C / s);

[0170] ◎Applied electric field:

[0171] ●Electric field oscillation frequency: 180kHz;

[0172] ●Duration of a batch of oscillations: about 0.02ms;

[0173] ●A batch of oscillation frequency: 15Hz;

[0174] ●t 1 = 6μs, t 2 = 20μs, t 3 = 0.05s;

[0175] ●Pulse quantity: 12 pulses for 180kW, 35 and 48 pulses for 45kW;

[0176] ◎Production rate, line speed of bottle: 0.4m / s for 180kW, 0.1m / s for 45kW. The length of the application area of ​​the...

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Abstract

The invention relates to a method for sterilising hermetically closed vessels containing a liquid to be sterilised, that comprises conveying the vessels into a processing area where the vessels are submerged in an external fluid flow, heating the volume of liquid to be sterilised by electromagnetic waves at a rate higher than 28 DEG C per second to a processing temperature T between 20 and 66 DEGC, agitating the vessel when heating the liquid, and depending on the value of the processing temperature T, exposing the liquid to a pulsed alternating electric field immediately or shortly after heating the liquid.

Description

technical field [0001] [01] The present invention relates to a method of sterilizing a liquid contained in a closed container, and a device for carrying out the method. Background technique [0002] [02] The sterilization method currently prevailing in the industry is to use a steam sterilizer, in which the containers are processed in batches for several minutes at a rate of thousands of containers per hour, usually at a temperature of 90°C to 130°C. However, sterilization at these temperatures may significantly alter the properties (colour, taste, odor, biophysical and biochemical quality, etc.) of the item being treated. In traditional heat sterilization methods, the temperature rise is slow to allow the microorganisms to adapt and better tolerate the temperature rise. [0003] [03] In patents US 4,695,472 and EP 1,328,167 are described methods aimed at lowering the temperature threshold necessary to sterilize aqueous liquids by applying an electric field. However the me...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): A23L3/01A23L3/02A23L3/32A23L2/48A23L2/50
CPCA23L3/01A23L3/04A23L2/48A23L3/022A23L3/32A23L2/50A23L3/02A01N1/00A23L3/00A61L2/00C12H1/06C12H1/08C12H1/18
InventorA·扎瓦德塞夫P·库里克
OwnerCELLO HOLDINGS LIMITED