Effect of Compound Protease Treatment on the Quality Characteristics of Wheat Germ Powder

Wheat germ powder was hydrolyzed by compound protease, and the effects of ratio of material to liquid, amount of enzyme and hydrolysis time on the quality characteristics of wheat germ powder were analyzed. At the same time, three groups of enzyme hydrolyzed powder with the highest water solubility index of wheat germ hydrolyzed powder and milk powder were compounded and sensory evaluation was made to determine the best compound ratio. The results showed that the quality of wheat germ powder hydrolyzed by protease was better than that of wheat germ ultrafine powder. When the ratio of material to liquid was 1:5 g/mL, the amount of enzyme was 4400 U/g and the reaction time was 2.5 h, the water solubility index of wheat germ powder reached the maximum, which was 60.6 g/g. Compared with the water solubility index 30.22 and 30.65 g/g of raw powder and ultra-fine powder, the water solubility index of wheat germ powder increased by about two times after enzymatic hydrolysis. When the ratio of material to liquid was