Xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws

Abstract

The invention belongs to the field of biological engineering, and provides a xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws. The preparation method comprises the following steps: conducting primary digestion and multi-stage screw pressing on the biomass straws so as to obtain primary digestion residues and coarse glucose liquid, and enzymatically hydrolyzing, clarifying, decolorizing, concentrating and drying the coarse glucose liquid so as to obtain xylooligosaccharide; conducting secondary digestion and multi-section double-roll extrusion on the primary digestion residues so as to obtain secondary digestion residues and black liquid, and conducting high-pressure homogenizing, mixed enzyme treatment and concentrating and drying on the secondary digestion residues so as to obtain dietary fibers; and conducting purifying, concentrating and drying, pre-carbonizing treatment, deoxidizing treatment, rinsing, drying and high-temperature carbonizing on the black liquid so as to obtain the three-dimensional graphene. The method provided by the invention achieves the full and efficient utilization of the straws, and the finished products (the xylooligosaccharide, the dietary fibers and the three-dimensional graphene) are good in quality. The method, which is free from the discharge of waste gas, waste liquid and residue, is safe and environment-friendly. The method provided by the invention can reduce production cost and improve a production effect, therefore the method is applicable to large-scale industrial production.

Description

technical field

[0001] The invention belongs to the field of biological engineering, and in particular relates to the utilization of biomass straws. Background technique

[0002] Biomass straw contains a large amount of cellulose, hemicellulose and lignin, which exist widely and can be used as a low-cost, environmentally friendly, and mass-produced carbon source, providing sufficient conditions for the comprehensive utilization of straw. As a large agricultural country, my country has widely planted crops such as corn, wheat, and rice, which leads to a large output of straw. Relevant surveys show that the total amount of straw in my country is as high as 600 million tons every year. Apart from a small amount of these organic raw materials being used for feed, returning to the field and fertilizer, a large part is burned, causing environmental pollution and waste of resources.

[0003] With the increasingly serious situation of energy shortage, environmental pollution and cl...

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