Method for peeling off walnut kernel pellicle by ultrasonic waves
A technology of walnut kernels and ultrasound, which is applied in the fields of shelling, pod removal, food science, etc., can solve the problems of decreased kernel quality and low aroma of walnuts, etc., and achieves the effects of high efficiency, high processing economic benefits, and quality assurance.
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[0019] Put the hulled walnut kernels in hot water at 50°C and immerse the walnut kernels in the hot water for 20 minutes. For walnut kernels of different sizes and different humidity, the hot water temperature and immersion time are different. For walnut kernels with high humidity or large particles, the hot water temperature should be slightly higher, and the immersion time needs to be longer, such as the hot water temperature of 75℃ and the immersion time of 20 minutes; on the contrary, the hot water temperature can be lower, for example The hot water temperature is 50°C and the immersion time is 5 minutes.
[0020] Put the heated walnut kernels into a container filled with cold water immediately. The cold water is required to completely immerse the walnut kernels. At the same time, a piezoelectric ultrasonic generator is used to apply a frequency of 10KHz~1MHz and a sound intensity of 0.2~10W / cm to the cold water. 2 Ultrasound for 4-20 minutes.
[0021] Similarly, the ultrasoni...
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