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Liquid material low-temperature electric field bactericidal method

A material and liquid technology, applied in the field of low-temperature electric field sterilization of liquid materials, can solve the problems of affecting the effect of electric field sterilization and enzyme sterilization, voltage reduction, energy consumption, etc., to achieve the effect of ensuring the effect of sterilization and enzyme sterilization, reducing current and reducing energy consumption

Inactive Publication Date: 2008-11-05
陈锦权
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, this technology has not yet been widely used in the processing of liquid materials, and is only limited to laboratory research. One of the main reasons is that compared with water, the conductivity of liquid materials such as fruit and vegetable juices and milk is much higher. When the electric field treatment chamber will cause the current to increase rapidly, according to P=IV, under the same situation of input power, the increase of the current will cause the voltage to decrease, because the electric field strength E=V / d (d is the distance between the two electrodes), the electric field The strength will also decrease, which will affect the sterilization effect of the electric field; in addition, the increase of the current will also generate Joule heat, which will cause the temperature of the material to rise rapidly and further increase the conductivity, and this part of energy is invalid heat, which not only consumes more energy, and at the same time requires an external cooling system to ensure that the entire machining process is in a non-thermal state

Method used

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  • Liquid material low-temperature electric field bactericidal method
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  • Liquid material low-temperature electric field bactericidal method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0042] Taking fruit and vegetable juice as an example, a specific embodiment of the low-temperature electric field sterilization method for liquid materials of the present invention is listed as follows:

[0043] First process fruits and vegetables through crushing, pressing, filtering, juice extraction and other processes to obtain fresh fruit and vegetable juice, and then process them according to the following steps:

[0044] ①Cool the fruit and vegetable juice to below 0°C for freezing and concentration, so that the water in the fruit and vegetable juice forms ice crystals, and then separate the ice crystals from the concentrated liquid to obtain non-thermal fruit and vegetable concentrated juice. This technology can usually make fruit and vegetable juice The concentration ranges from 35% to 40% (w / w). This means that the fruit and vegetable juice with an original concentration of 8% has been excluded from more than 3 / 4 of its moisture, and its volume has been reduced to 1...

Embodiment 1

[0054] Embodiment 1: non-thermal solid orange juice (concentration is in soluble solids concentration meter)

[0055] (1) Select fresh oranges, wash them, drain them, cut them in half, squeeze the juice, and take the filtered orange juice.

[0056] (2) The orange juice with an initial concentration of 12°Brix was freeze-concentrated at -1°C to -6°C to become a freeze-concentrated orange juice with a concentration of 36°Brix, and the concentration factor was 3.

[0057] (3) It is 1000V / cm that above-mentioned freeze-concentrated orange juice flows through electric field strength at low temperature, frequency 20MHz, the high-frequency electric field that processing time is 12s, obtains cold sterilization concentrated orange juice after carrying out sterilization; Or flow through electric field strength is 10kv / cm, A high-voltage pulsed electric field with a pulse number of 400 and a pulse width of 17 μs was used to obtain cold-sterilized concentrated orange juice after steriliza...

Embodiment 2

[0060] Embodiment 2: non-thermal power solid carrot juice (concentration is in soluble solids concentration meter)

[0061](1) Choose fresh carrots, wash, drain, peel, beat, filter, and take the filtered carrot juice

[0062] (2) Carrot juice with an initial concentration of 7°Brix was freeze-concentrated at -3°C to -6°C to become freeze-concentrated carrot juice with a concentration of 33°%, and the concentration factor was 4.7.

[0063] (3) It is 2000V / cm that above-mentioned freeze-concentrated carrot juice flows through electric field intensity, and frequency 20MHz, the high-frequency electric field that processing time is 12s, after carrying out sterilization, obtain cold sterilization concentrated carrot juice; Or flow through electric field intensity and be 20kV / cm, A high-voltage pulse electric field with a pulse number of 400 and a pulse width of 17 μs was used for sterilization to obtain cold-sterilized concentrated carrot juice.

[0064] (4) the concentration that ...

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Abstract

The invention relates to a method for the low-temperature electric field sterilization of liquid material, which is characterized in that: the liquid material is concentrated and cooled to the temperature between zero DEG C to the freezing point temperature of a concentrated liquid, and then sterilization treatment is carried out to the low-temperature concentrated liquid by the an electric field. The method for the low-temperature electric field sterilization of the liquid material can lower current generated by the liquid material in the electric field sterilization treatment process, thus not only ensuring effective sterilization and enzyme-killing effect, but also reducing energy consumption and temperature rise.

Description

technical field [0001] The invention relates to a low-temperature electric field sterilization method for liquid materials, which can widely use electric fields such as high-frequency electric fields and high-voltage pulse electric fields to treat various high-conductivity liquid materials, such as fruit juice, vegetable juice, milk, tea and other foods Liquid materials such as Chinese herbal medicines, or liquid materials such as Chinese herbal medicines, etc. Background technique [0002] Electric field sterilization technology is a representative non-thermal processing technology. For example, a Chinese invention patent application with a patent number of 200710008847.4 proposed by the applicant of the present invention as the inventor on April 18, 2007 "non-thermal fruit and vegetable concentrated juice sterilization and enzyme inhibition Processing method", this method makes fresh fruit and vegetable juice flow through a high-voltage pulsed electric field with an electr...

Claims

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Application Information

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IPC IPC(8): A23L2/50A23L3/01A23C3/07
Inventor 陈锦权方婷
Owner 陈锦权
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