A kind of preparation method of rice protein
A rice protein and rice technology, applied in the food field, can solve problems such as poor taste, low degree of hydrolysis, loss of nutrients, etc., and achieve the effects of improving purity and quality, improving solubility and degree of hydrolysis, and reducing bitterness
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Embodiment 1
[0023] 1) Rice pretreatment: Soak the rice at 10°C for 2 hours, control the water content of the rice to 25% after soaking, pulverize, and pass through an 80-mesh sieve; mix the sieved rice powder with water according to the ratio of material to liquid at 1:4, Stand still for 5h;
[0024] 2) Enzymatic removal of impurities: Add 20 U / g rice flour amylase and 30 U / g rice flour glucoamylase to the mixed solution obtained in step 1). Control the temperature at 45°C, adjust the pH to 7.0, stir for 2 hours, raise the temperature to 80°C after the reaction, and inactivate the enzyme for 15 minutes;
[0025] 3) Washing: filter step 2) to obtain the mixed solution, and repeatedly wash the residue with water, and use plate and frame filter press to remove the washing solution;
[0026] 4) Ultrasonic compound enzymolysis: add water to the slag phase treated in step (3) to adjust the mass concentration to 60%, use 400W ultrasonic treatment for 5min, add 200U / g rice powder protease, and 1...
Embodiment 2
[0031] 1) Rice pretreatment: Soak the rice at 10°C for 2.5 hours, control the water content of the rice to 25% after soaking, crush it, and pass it through an 80-mesh sieve; mix the sieved rice powder with water according to the ratio of material to liquid 1:5 , stand still for 5h;
[0032] 2) Enzymatic removal of impurities: Add 20 U / g rice flour amylase and 30 U / g rice flour glucoamylase to the mixed solution obtained in step 1). Control the temperature at 45°C, adjust the pH to 7.0, stir for 2 hours, raise the temperature to 80°C after the reaction, and inactivate the enzyme for 15 minutes;
[0033] 3) Washing: filter step 2) to obtain the mixed solution, and repeatedly wash the residue with water, and use plate and frame filter press to remove the washing solution;
[0034] 4) Ultrasonic compound enzymolysis: add water to the slag phase treated in step (3) to adjust the mass concentration to 50%, use 400W ultrasonic treatment for 5min, add 250U / g rice powder protease, and...
Embodiment 3
[0039] 1) Rice pretreatment: Soak the rice at 10°C for 2 hours, control the water content of the rice to 20% after soaking, pulverize, and pass through an 80-mesh sieve; mix the sieved rice powder with water according to the ratio of material to liquid at 1:4, Stand still for 5h;
[0040] 2) Enzymatic removal of impurities: add 20 U / g rice flour amylase and 30 U / g glucoamylase to the mixed solution obtained in step 1). Control the temperature at 45°C, adjust the pH to 7.0, stir for 2 hours, raise the temperature to 80°C after the reaction, and inactivate the enzyme for 15 minutes;
[0041] 3) Washing: filter step 2) to obtain the mixed solution, and repeatedly wash the residue with water, and use plate and frame filter press to remove the washing solution;
[0042] 4) Ultrasonic compound enzymolysis: add water to the slag phase treated in step (3) to adjust the mass concentration to 65%, use 400W ultrasonic treatment for 5min, add 200U / g rice powder protease, and 1×10 7 CFU ...
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