Technique for continuously extracting sweet potate starch, sweet potato protein and dietary fiber from sweet potato

Abstract

The invention provides a process for continuously extracting sweet potato starch, sweet potato protein and dietary fibre from sweet potato specially for processing the sweet potato and belongs to the filed of food biotechnology. The sweet potato is cleaned, is added with a color protective solution, and is pulverized, ground and squeezed in order to separate sweet potato residue and cell sap; a cleaning solution of the sweet potato residue and the cell sap are mixed and are filtered through a standard sieve with 200 meshes; a filtrate is subjected to centrifugal dehydration twice and is dried to obtain starch; after starch milk is separated out, the filtrate is degraded with starch; the filtrate with molecular weight of between 5,000 and 10,000 is intercepted, ultrafiltered, condensed and dried to obtain coarse protein of the sweet potato; and the sweet potato residue is added into a biological reactor, is added with water, protease and amylase for reaction, and is subjected to filter pressing, drying and pulverization to obtain insoluble the dietary fiber of the sweet potato. The method can fully utilize organic compositions in the sweet potato, minimize the generation and emission of organic wastewater and waste residue with high concentration, realize the full-value utilization of the sweet potato, and remarkably improve the economic value of the sweet potato.

Description

1. Technical field [0001] The invention relates to a process for continuously extracting sweet potato starch, sweet potato protein and dietary fiber from sweet potatoes, applies modern biotechnology to deep processing of sweet potatoes, is specially used for sweet potato processing, and belongs to the field of food biotechnology. 2. Background technology [0002] Sweet potato, also known as sweet potato, sweet potato, etc., is widely distributed in my country, and its output ranks first in the world. Sweet potato is rich in nutrition, the mass fraction of water in its root tubers is 60% to 80%, the mass fraction of carbohydrates is 10% to 25%, and a small amount of protein, fat, cellulose, ash, vitamins, etc., and a small amount of organic acids, polysaccharides, etc. Phenolic substances and polyphenol oxidase, etc. In recent years, nutritionists have found that sweet potatoes are rich in mucus protein. It is a mixture of polysaccharides and proteins, which has a special p...

AI Technical Summary

Problems solved by technology

Many sweet potato starch production enterprises in China produce a large amount of waste water and waste residue every day, resulting in a great waste of resources, resulting in high cost of main products and low economic benefits, which plagues the development of processing enterprises and causes environmental pollution at the same time