The invention provides a method for synchronously preparing
peanut oil and peanut peptides through aqueous enzymatic extraction and belongs to the technical field of
deep processing of agricultural products and comprehensive utilization of byproducts of the agricultural products, mainly solving the technical problems that
protein products obtained according to a conventional technology for preparing oil from peanuts through aqueous enzymatic extraction have low purity and are imperfect in oil
flavor and easy in generation of
emulsion and the like. The method comprises the following steps of: baking peanut kernels,
grinding, adding water so as to adjust acid for extraction, carrying out
three phase centrifugation, combining oil bearing
emulsion phase and
protein concentrate, adjusting alkali, adding
protease for
enzymatic hydrolysis, carrying out high-temperature
enzyme deactivation after the
enzymatic hydrolysis is ended, and carrying out
three phase centrifugation under a hot condition, thus directly obtaining the free oil and the peanut peptides. Peanuts are processed by adopting the method, so that the
emulsion can be basically avoided, and the obtained oil has strong
flavor and high quality; the peanut peptides have high purity (75% of
protein content) and low relative molecular
mass and can be used as a good functional additive to be widely applied to
food processing.