Production process for preparing high-activity compound dietary fibers by extracting from Gracilaria

Abstract

The invention discloses a production method for preparing high-activity compound dietary fibers by extracting from Gracilaria. The production process comprises the following steps of: (1) alkali treatment: cleaning a dry Gracilaria product by using tap water and then soaking the dry Gracilaria product by using alkali liquor at high temperature; (2) bleaching: bleaching by using sodium hypochlorite; (3) acidification: acidifying the frond by using hydrochloric acid after the frond is bleached; (4) colloid extraction: placing the frond in an extraction kettle after acidifying and adding distilled water for extracting colloid; then filtering by using nylon cloth to obtain filter liquor and filter residues and cooling the filter liquor to obtain the colloid; freezing, dewatering, drying and pulverizing the colloid into powdered soluble dietary fibers; (5) activation: activating the filter residues by using cellulase and then dewatering, drying and pulverizing the activated filter residues into powdered insoluble dietary fibers; and (6) mixing: mixing the soluble dietary fibers and the insoluble dietary fibers by a certain proportion to obtain the Gracilaria high-activity compound dietary fibers. In the invention, both the soluble dietary fibers and the insoluble dietary fibers of the Gracilaria are utilized, thereby solving the recycling problem of the Gracilaria filter residues and improving the utilizing value of the Gracilaria.

Description

technical field [0001] The invention relates to a process for extracting dietary fiber, in particular to a production process for extracting and preparing high-activity composite dietary fiber from Gracilaria. Background technique [0002] Dietary fiber (DF), generally considered to be a type that cannot be digested by human digestive enzymes, is mainly composed of edible plant cell wall residues (cellulose, hemicellulose, lignin, etc.) Compounds of matter. But it is also an important class of food nutrients necessary for the human digestive process. Dietary fiber has important physiological functions, such as beneficial gastrointestinal motility, prevention and treatment of constipation, as an ideal satiety agent, reduces calorie intake, and plays a role in weight loss; prevents the absorption of fat and cholesterol, and accelerates its excretion, which can prevent constipation. The role of cardiovascular and cerebrovascular diseases, absorbing chemical carcinogens in foo...

AI Technical Summary

Problems solved by technology

Gracilaria is generally considered not to be eaten directly among the people. At present, only part of it is used as feed, agar gum and raw materials in the pharmaceutical industry. Most of Gracilaria has not been well utilized, and its development and utilization value is low.