Microbial degumming process of linen fiber

Abstract

The invention discloses a microbial degumming process of linen fiber. The microbial degumming process comprises the steps as follows: preparing a bacterial liquid transferring selected strains in a strain culture tank to be cultured continuously for one week to obtain the bacterial solution for later use after the concentration of the bacterial solution meets the requirement; placing the linen fiber in a bleaching jar; spraying the bacterial solution to the bleaching jar in the bath ratio being 1:(7.5-8.5), controlling the pH and temperature in the jar and keeping the constant temperature for45-55 min; after heat preservation, recovering the bacterial solution in the strain culture tank; preparing an acid pickling solution in an auxiliary jar, spraying the acid pickling solution in the bleaching jar, and discharging the solution after circulation for 15-25 min; preparing an oxygen bleaching solution, increasing the temperature to 82-87 DEG C and keeping the constant temperature for 50-70 min; discharging the oxygen bleaching solution and performing washing for 3 times; placing the bleached linen fiber in a dehydrator to be dehydrated for 10-20 min; spreading the dehydrated linen fiber on a radio frequency machine for drying. Few auxiliary materials are used, the stability is good, the degumming period is short, strains can be recycled, the degumming wastewater pollution is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fiber degumming process, in particular to a flax fiber microbial degumming process. Background technique [0002] The bast part of flax, ramie, kenaf, hemp, apocynum and other hemp crops contains 20%-40% non-cellulose substances, including lignin, pectin and hemicellulose, which are embedded between cells And in the cell wall, the structure is very complex, and the development and utilization of hemp needs to be extracted from fibers. The extraction process of fibers generally needs to remove non-fibrous substances, and the degumming process is the key step. Hemp degumming methods mainly include chemical degumming and biological degumming. The traditional retting method has problems such as long degumming cycle, serious pollution, difficult control of process conditions, and unstable fiber yield and quality; existing hemp degumming enterprises generally use chemical degumming method, which consumes a lot...

AI Technical Summary

Problems solved by technology

The traditional retting method has problems such as long degumming cycle, serious pollution, difficult control of process conditions, and unstable fiber yield and quality; existing hemp degumming enterprises generally use chemical degumming method, which consumes a lot of water, and the fiber production rate is low. A large amount of high-concentration wastewater and waste residues are produced, seriously polluting the environment and restricting the healthy development of the industry

The current enzyme degumming method has disadvantages such as large amount of auxiliary materials, poor stability, long degumming cycle, unrecyclable strains, large pollution of degumming wastewater, and high cost.