A method of uniformly drying Agaricus bisporus slices combined with frequency conversion ultrasonic assisted dipping pretreatment and vacuum microwave

Abstract

The invention relates to a method for uniformly drying agaricus bisporus slices through variable-frequency ultrasound-assisted impregnation pretreatment and vacuum microwaves, and belongs to the field of deep processing of agricultural products. The method comprises the following steps: cleaning agaricus bisporus and cutting into 5-8mm thick slices, protecting color by using a mixed solution of vitamin C, citric acid and calcium chloride, and carrying out variable-frequency staged ultrasound impregnation treatment on the color-protected agaricus bisporus slices: a first stage: putting the agaricus bisporus slices in clear water according to a ratio of agaricus bisporus slice to water of 1:5, and setting the water temperature to 45-50 DEG C, the ultrasonic frequency to 45KHz, the ultrasonic power to 120-150W, and the treatment time to 30-40min; a second stage: taking out the agaricus bisporus slices and putting into a mixed solution of 50-60% by mass fraction of sucrose and 5% by mass fraction of salt according to a ratio of agaricus bisporus slice to mixed solution of 1:10, and setting the water temperature to 35-40 DEG C, the ultrasonic frequency to 100KHz, the ultrasonic power to 210-240W and the treatment time to 40-50min; finally, carrying out vacuum microwave drying, and setting the microwave transmitting power to 15-20W / g, the degree of vacuum to 70-80kPa and the drying time to 15-25min. The agaricus bisporus slices subjected to variable-frequency ultrasound-assisted impregnation treatment has uniformly distributed dielectrics; when the vacuum microwave drying is carried out, a material is uniformly heated in a microwave field, and moisture is rapidly evaporated, so that the dried agaricus bisporus slice is uniformly distributed in color and luster, and is uniform in shape and better in rehydration.

Description

technical field [0001] The invention relates to a method for uniformly drying Agaricus bisporus slices in combination with frequency-conversion ultrasonic-assisted dipping pretreatment and vacuum microwave, belonging to the field of intensive processing of agricultural products. Background technique [0002] Agaricus bisporus is the edible fungus with the highest production and consumption in the world. China's Agaricus bisporus output and export volume both rank first in the world, and the output in 2007 reached 2.44 million tons. Agaricus bisporus is rich in nutrition, contains 6 kinds of amino acids necessary for the human body, and is also rich in vitamin B 1 , Vitamin B 2 , vitamin PP, nucleotides, nicotinic acid, ascorbic acid and vitamin D, etc. At the same time, mushroom polysaccharides and isoproteins contained in Agaricus bisporus also have certain anticancer activities, which can inhibit the occurrence of tumors. However, due to the high moisture content, Agari...

AI Technical Summary

Problems solved by technology

Aiming at the problem of poor uniformity in the vacuum microwave drying of Agaricus bisporus, a new frequency conversion ultrasonic assisted impregnation treatment method was established to improve the dielectric properties of Agaricus bisporus materials, make the dielectric distribution of Agaricus bisporus slices uniform, and enhance the conductivity and dielectric loss of materials at the same time Factor ε″, so as to improve the microwave absorption rate and absorption distribution uniformity of materials in the vacuum microwave drying (MVD) process of Agaricus bisporus slices, and then produce dehydrated Agaricus bisporus slices products with uniform color distribution and uniform shape

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