Production of rice-starch and rice-protein polypeptide powder by composite enzyme method

Abstract

This invention is a method to produce rice starch and rice polypeptide powder using compound enzymes. The rice is crushed into rice powder, steeped in water and stirred. Sodium hydroxide is added for regulating the pH value and conditioning. Then 200 thousand activity units of compound enzymes as 4-8%. of the dry basis are added for hydrolysis. The compound enzyme is composed of basic protease, neutral protease, acidic protease and flavor enzyme. Then after centrifugal separation, water is added to the subjacent white sedimentation and homogenized, and after another centrifugal separation, the white sedimentation is dried to produce rice starch. The supernatant and the upper swallow portion are produced into rice polypeptide powder after homogenizing concentrated liquid and drying. This invention shortens the productive period consumedly and decreases the cost. In the productive progress there is no waste water generated. The quality and productive efficiency is also improved compared with other methods.

Description

technical field [0001] The invention relates to the technical field of rice starch production, in particular to a method for producing rice starch and rice protein polypeptide powder by a compound enzyme method. technical background [0002] At present, the annual output of global starch is about 20 million tons, of which the output of rice starch accounts for about 5%, that is, about 1 million tons, and the production areas of rice starch are mainly concentrated in the United States, France, Belgium and other countries; and the annual growth rate of the global starch market The demand is more than 30 million tons, of which the annual demand for rice starch is about 3 million tons. The reason why the output of rice starch has been unable to increase is mainly because the production technology of rice starch has not achieved a fundamental breakthrough, and the "alkali leaching" process has been used for decades. The production cycle of this method is long, and the molecular ...

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Problems solved by technology

[0014] In summary, it can be seen that although the research on preparing rice starch and rice protein has made great progress compared with the past at home and abroad, there are still many problems, and there are still many places to be improved, such as: production cycle Generally longer, production cost and energy consumption are relatively large, the problem of production sewage discharge, the yield of rice starch and rice protein is generally low, and the product quality of rice starch and rice protein is generally low

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