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Method for sterilizing liquid food by virtue of micro plasma

A micro-plasma, liquid food technology, applied in the field of ionic liquid food sterilization, can solve the problems of expensive radiation equipment, denaturation of nutrients, loss of flavor components, etc., and achieve the effect of low cost

Inactive Publication Date: 2014-12-03
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because heat sterilization requires heating of food, it causes loss of flavor components or denaturation of certain nutrients
Cold sterilization includes radiation sterilization, ultraviolet sterilization, ozone sterilization, high-voltage pulse electric field sterilization, etc. Radiation equipment is expensive and harmful to the human body. Ultraviolet sterilization can only achieve surface sterilization. Bacteria have the problem of residual ozone tail gas

Method used

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  • Method for sterilizing liquid food by virtue of micro plasma
  • Method for sterilizing liquid food by virtue of micro plasma

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Experimental program
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Embodiment

[0014] As shown in the accompanying drawing, the bactericidal test was carried out with the apple juice added with the disinfection indicator bacteria Escherichia coli (No.: ATTC25922) as the treatment object. 100mL of apple juice was introduced into the micro-plasma device. The micro-plasma device used a glass reactor with a height of 8.5 cm and an inner diameter of 5.5 cm. The main body of the anode is a stainless steel tube with a length of 8 cm and an inner diameter of 0.7 mm. Oxygen is injected into the stainless steel electrode body through the pipeline from the oxygen source to the reactor. The stainless steel electrode is placed vertically above the reaction water, and the gas outlet of the electrode is 2mm away from the water surface. The cathode is a tungsten rod with a length of 15em and a diameter of 1mm. The tungsten rod is connected to the ground terminal of the DC high voltage power supply. The two electrodes were kept at a distance of 4 cm. After starting t...

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Abstract

The invention discloses a method for sterilizing a liquid food by virtue of micro plasma. The method particularly comprises the steps: introducing the liquid food into a micro plasma device; opening an air source, regulating an air flow, starting a direct-current and high-voltage power supply after the air flow is stabilized, starting a discharge reaction, and forming micro plasma between an anode and a liquid level of the liquid food; discharging for 3-10min by using strong sterilizing oxidants such as OH, H2O2 and HO2 generated by the micro plasma so that harmful microorganisms in the liquid food can be effectively killed and the sterilization and disinfection on the foods are realized. According to the actual requirement, the method is capable of simply and conveniently killing the harmful microorganisms in the liquid food at low cost and high processing efficiency, realizes safe guarantee of the liquid food, and has a potential development prospect.

Description

technical field [0001] The invention relates to liquid food sterilization technology, in particular to a micro plasma liquid food sterilization method. Background technique [0002] Juice, liquid milk, beverages and other liquid foods need to be sterilized before leaving the market in order to ensure that no deterioration or spoilage occurs during transportation and sales. At present, the commonly used methods for liquid foods include heat treatment and cold treatment. Based on the temperature and time required for liquid food sterilization, heat treatment includes pasteurization and ultra-high temperature instantaneous sterilization. Since heat sterilization requires heating of food, it causes loss of flavor components or denaturation of certain nutritional components. Cold sterilization includes radiation sterilization, ultraviolet sterilization, ozone sterilization, high-voltage pulse electric field sterilization, etc. Radiation equipment is expensive and harmful to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/00
CPCA23L3/32A23L2/50A23V2002/00A23V2300/12
Inventor 杜长明
Owner SUN YAT SEN UNIV
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