The present invention is based on the fact that the water content level of the soybean sprout beans mixed with several to several tens% is not reached at the water temperature of 15-18C, which is the water temperature of the ground water generally used, In order to achieve water absorption and germicidal activity, it is necessary to set the water flood water temperature to 25-40C or to use water-based immersion water of 25-40C as an alkaline substance or other alkaline substance to prevent physical penetration of water To minimize unnecessary doughs and utilize them as bean sprouts raw beans.
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