Process for preparing barley germ oil and low molecular weight peptide by solid enzymolysis-CO2 (carbon dioxide) supercritical extraction

Abstract

The invention provides a process for preparing barley germ oil and a low molecular weight peptide by solid enzymolysis-CO2 supercritical extraction, which belongs to the technical field of barley germ processing, and is characterized in that (1) the process flow comprises five process: lipoxygenase deactivating, raw material solid enzymolysis, CO2 supercritical extraction on the germ oil, extraction on the low molecular weight peptide and drying on the low molecular weight peptide; (2) the process conditions are shown as follows: in the lipoxygenase deactivating, original lipoxygenase in theraw material of barley germ powder is deactivated in the manner of heating or microwaves and the like; in the raw material solid enzymolysis, distributing water to the raw material of the barley germpowder to enable the water content of the raw material of the barley germ powder to reach 9-15 percent, and then, neutral protease is added for the solid enzymolysis; in the CO2 supercritical extraction on the germ oil, the extraction pressure is 20-40MPa, and the extraction time is 1-2 hours; in the extraction on the low molecular weight peptide, the dregs of the barley germ powder are extractedfor 2-3 times by the water to obtain the liquid containing the low molecular weight peptide; and in the drying on the low molecular weight peptide, the liquid containing the low molecular weight peptide is dried in the manner of spray drying or fluidized bed drying to obtain a low molecular weight peptide product. The prepared barley germ oil and the prepared low molecular weight peptide are widely used for industry of foodstuffs, daily chemicals and the like. The barley germ powder is deeply processed by the process for preparing the barley germ oil and the low molecular weight peptide by the solid enzymolysis-CO2 supercritical extraction, i.e. waste is changed into valuable, thereby, the use value and the market value of the barley germ powder are greatly increased.

Description

1. Technical field: [0001] The invention provides a solid enzymolysis-CO 2 The invention relates to a supercritical extraction process for producing highland barley germ oil and small molecule peptides, which belongs to the technical field of highland barley germ processing. 2. Technical background: [0002] Highland barley is a common name for naked barley, which belongs to the grass family and the genus Hordeum in plant classification. Highland barley is the most important cereal crop on the Qinghai-Tibet Plateau. It has the characteristics of early maturity, cold tolerance, barren tolerance, stable yield, and wide adaptability. Highland barley has made outstanding contributions to solving the food and clothing problems of local farmers and herdsmen, but due to its backward processing technology, it is far from playing its due important role in the process of getting rid of poverty. Therefore, it is imminent to develop the processing and comprehensive utilization technol...

AI Technical Summary

Problems solved by technology

Due to the poor taste of highland barley germ, it is only u