Industrial method for improving absorption utilization rate of cottonseed protein

Abstract

The invention discloses an industrial method for improving the absorption utilization rate of cottonseed protein. The method comprises the following steps of: (1) extracting oil of cottonseed protein blank with a non-polar solvent in an oil extractor to obtain mixed oil and wet blank; (2) spraying extraction gossypol on the wet blank with a polar solvent in a dephenolizing extractor in a segmented manner to obtain dephenolized wet meal; (3) desorbing the solvent and water in the wet meal with a liquid squeezing machine to obtain cottonseed; (4) drying and performing desolvation on the cottonseed with a low-temperature desolvation device; and (5) cooling and grinding the cottonseed after the drying and desolvation to obtain a finished product of dephenolized cottonseed protein. Through the processes, the potassium hydroxide solubility of the produced cottonseed protein can be improved from 35% to about 50%, and amino acid accounts for over 90% by weight of the total protein, thus relatively high bioavailability of the cottonseed protein is ensured, the nutritional values of the cottonseed protein are increased, and the use values of the cottonseed protein in the feed industry are also promoted. The method is easy to operate, and the production cost is low.

Description

technical field [0001] The invention relates to a technology for removing phenols from cottonseed, in particular to an industrial method for improving the absorption and utilization rate of cottonseed protein. Background technique [0002] my country is a big cotton-producing country with abundant cottonseed resources, which are rich in protein. The nutritional value of cottonseed protein is close to that of soybean protein. It is a good protein feed resource and can be used to replace fish meal and soybean meal. The price of cotton meal is much lower than that of soybean meal and fish meal. Therefore, the application of cottonseed protein has a strong competitive advantage, and the market development prospect is broad. [0003] However, ordinary cottonseed meal contains high free gossypol, which will cause harm to the liver and male reproductive system of animals when used as feed. Traditional cottonseed processing is generally carried out at a high temperature above 100°...

AI Technical Summary

Problems solved by technology

At present, there are many dephenolized cottonseed protein products on the market, such as "full dephenolized cottonseed protein", "detoxified cottonseed protein", "high protein detoxified cottonseed meal" and so on. Although these products have removed part of gossypol, they are harmful to animals. Toxicity is reduced, but in the process of removing gossypol, the combination of amino acids in gossypol and gossypol causes serious loss of amino acids, so there is still the problem of low bioavailability of gossypol, which is reflected in the physical and chemical indicators of the product. Potassium hydroxide has low solubility