Application of LED blue light in dairy product production

A dairy product, blue light technology, applied in the field of LED blue light sterilization, can solve the problem of not completely killing heat-resistant bacillus, and achieve the effect of maintaining good flavor, maintaining nutrients, and extending shelf life

Inactive Publication Date: 2016-05-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heat-resistant spores and psychrophilic bacteria in UHT milk are the main microorganisms that affect the quality and quality of UHT milk during the shelf life. 6s heat treatment intensity, the current UHT production process cannot completely kill heat-resistant spores

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In this embodiment, the milk powder production is taken as an example, and the LED blue light irradiates the outlet of the fluidized bed, the powder bin, the vibrating screen, the powder truck, and the automatic packaging machine. Blue light irradiation power density is 5mW / cm 2 . For surface sterilization of objects, the distance between the lamp tube and the irradiated surface should be 1m, and the sterilization effect is the best. For milk powder sterilization, the thickness of the powder layer should not exceed 2 cm. During sterilization, the ambient temperature should be controlled at 20-40°C and the humidity should be 40-60%. If the temperature is too high or too low, it will affect the sterilization effect. The irradiation time should not be less than 10 seconds. Appropriately prolonging the irradiation time is better. Using LED blue light irradiation, the killing rate of Cronobacter sakazakii can reach more than 90%.

Embodiment 2

[0014] This embodiment takes the production of liquid milk as an example, and the LED blue light irradiates the outlet of the cooler and the automatic filling machine. Blue light irradiation power density is 20mW / cm 2 . It is advisable that the distance between the lamp tube and the irradiated surface should be less than 1m, and the sterilization effect is the best.

Embodiment 3

[0016] This embodiment takes the production of stirred yogurt as an example, and the blue LED light illuminates the outlet of the fermenter, the mixer, and the automatic filling machine. Blue light irradiation power density is 10mW / cm 2 , the distance between the lamp tube and the irradiated surface should be less than 1m, and the sterilization effect is the best.

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PUM

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Abstract

The invention discloses an application of LED blue light in dairy product production. The LED blue light is mainly applied to a dairy product packaging procedure, and a blue LED light source with the wavelength of 450 nm plus or minus 25 nm is utilized; a material is always under irradiation of the LED blue light after the material leaves a closed system and before the material enters a packaging container, conditions such as irradiation intensity, an irradiation distance and the like are controlled to reach optimal values, and the sterilization effect is realized, wherein blue light irradiation power density at least reaches 5 mW/cm <2>, the shorter the irradiation distance, the better, and the irradiation distance cannot exceed 1 m. LED visible light is adopted as the light source, and bacteria in a diary product are killed in a photodynamic sterilization mode; the method has low cost, is safe, non-toxic and non-pollution, can be taken as an auxiliary method for a traditional sterilization technology, is a non-specific microorganism inactivating method and has a broad-spectrum sterilization characteristic, good flavor of the product is maintained to the greatest degree, and the shelf life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of dairy processing and relates to a LED blue light sterilization method. Background technique [0002] China's demand for dairy products is growing day by day, but in recent years, food-borne diseases caused by dairy products have increased, safety accidents have occurred frequently, the quality of dairy products has suffered a lot of criticism, and dairy companies have encountered unprecedented challenges. Dairy product contamination includes chemical pollution and microbial contamination. Microbial contamination is one of the main factors affecting the quality and safety of dairy products, and it is also the main source of some large-scale foodborne disease outbreaks. Heat treatment is the most effective means and the only means to kill microorganisms and ensure the safety of dairy products in the dairy industry. Thermal sterilization of dairy raw materials can achieve sterilization and commercial steril...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C3/07
CPCA23C3/07
Inventor 马莺李琳王荣春何胜华
Owner HARBIN INST OF TECH
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