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endanger the safety of food; The traditional low temperature heating can not kill all in food microbiology, and high temperature sterilization will destroy nutrients in the food and the food in different degrees of natural features, result in nutritional components of destruction, loss, or lead to bad flavor, color intensifies, loss of volatile components, etc.
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ultrasonic
❖ Ultrasonic belongs to the mechanical wave, as part of the sound waves, frequency is greater than 20 KHZ.
❖ Particle by mechanical force is generated by the medium effect of periodic vibration.
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(2) Cavitation effect (3) heat effect
Due to the ultrasonic frequency is high, the energy is large, when absorbed by the medium can have a significant effect.
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