Method for preparing dietary fiber flour from sweet potato starch production waste

Abstract

The invention discloses a method for preparing dietary fiber flour from sweet potato starch production waste. According to the method, a dietary fiber is prepared from sweet potato residues and liquid waste generated in the sweet potato starch production process; the sweet potato residues and nutrient substances contained in the liquid waste are also utilized to cultivate acetobacter xylinum as a carbon source and a partial nitrogen source, and are fermented to prepare bacterial cellulose; the raw materials are fully utilized; meanwhile, methods for carrying out ultra-low temperature frozen pretreatment on the sweet potato residues and carrying out high-pressure gas impact-assisted mixed enzymolysis are adopted in the preparation process; and the yield of the dietary fiber flour is increased and the purity of the dietary fiber flour is improved. According to the method, the sweet potato starch production waste can be fully utilized; the yield of the dietary fiber is increased, and the purity of the dietary fiber is improved; and the pollution to environment caused by sweet potato starch production is reduced.

Description

technical field

[0001] The invention belongs to the field of dietary fiber processing, and relates to a method for preparing dietary fiber powder from waste sweet potato residue and waste liquid in the production process of sweet potato starch. Background technique

[0002] Sweet potato is an important crop with high and stable yield, rich nutrition and wide application. Sweet potato is rich in starch, and the starch content in sweet potato accounts for about 70% of the total dry matter, which can be used to prepare sweet potato starch. But, can produce the waste of sweet potato dregs and waste liquid in the process of sweet potato starch production, sweet potato dregs accounts for about 10-14% of raw material, and sweet potato dregs contains a large amount of nutrients, wherein starch content 40-50%, dietary fiber content 20-30%, the waste liquid contains soluble sugar, protein, amino acid, minerals and residual starch, etc. These substances are easily corrupted under the a...