Method for extracting peanut oil and fat and protein with ultrasonic assisted aqueous enzymatic method

The invention discloses a method for extracting peanut oil and fat and protein with an ultrasonic assisted aqueous enzymatic method, belonging to the technical field of fine processing of agricultural products and comprehensive utilization of by-products. The method comprises the following steps: after grinding blanched peanuts with a dry method, adding water to adjust alkali for ultrasonic-assisted extraction, and digesting after adjusting alkali at the second time; low-speed centrifuging to obtain free oil I and emulsion I, and high-speed centrifuging the emulsion I to obtain free oil II and emulsion II; causing the emulsion II to carry out complex enzyme breaking to obtain demulsification oil I, and causing stubborn emulsion to carry out ethanol-assisted breaking to obtain demulsification oil II; ultra-filtering and desalting protein fluid, and then spray drying to obtain peanut isolate protein powder. Finally, the extraction ratio of free oil is 83 percent, the extraction ratio of total oil is 92 percent,