New method for development and utilization of potato residue resource

Abstract

The invention relates to a new method for the development and utilization of potato residue resource, comprising the following steps: (1) adding water to the potato residue pulp or potato residue powder, wherein the mass-volume ratio of the potato residue dry substance to water is 1:12.5-1:50; (2) adding protease to process, carrying out reaction for 5-150 min, and then boiling the mixture for 10min, cooling the mixture to 20-30 DEG C and adjusting the pH value of feed liquid to 7.0-7.3; (3) centrifuging the potato residue enzymolysis liquid processed in step (2), collecting supernate to obtain polypeptide liquid, drying the polypeptide liquid to obtain polypeptide powder; and (4) applying the sediment obtained in step (3) to extract potato residue dietary fiber. The preferable enzyme istrypsin, the technique has the following conditions: substrate concentration: 4%, pH value: 8.0, temperature: 50 DEG C, enzyme addition quantity: 7% and enzymolysis time: 90 min. In the invention, the enzyme processing separation method is adopted to prepare the potato residue antioxidant peptide and dietary fiber and develop and utilize the potato residue resource, the production conditions are mild and the additional value of the product is high.

Description

technical field

[0001] The invention relates to the high-efficiency development and utilization technology of potato dregs, specifically converting protein in potato dregs into polypeptide substances with antioxidant activity by using an enzymatic hydrolysis method, and belongs to the field of biotechnology. Background technique

[0002] Potato residue is the main by-product produced in the potato starch production process. The main components of potato residue are water, pectin, cellulose and other substances. The protein content of fresh residue is 1% to 4%, while the dry protein content is 30% to 40%. %, the starch content is less than 1%, the nutritional value is low, and there are as many as 33 kinds of bacteria, it is not easy to store and transport, and it will produce stench after spoilage and cause environmental pollution. If it is dried, the cost will be too high, which will increase the burden on the enterprise. It is usually used as feed or as waste residue for l...

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