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Online ramie biological degumming method

A technology of biological degumming and ramie, applied in the direction of bacterial retting, can solve the problems of high residual glue rate, low breaking strength, low production rate, etc., and achieve the effect of uniform degumming

Inactive Publication Date: 2010-09-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention proposes an online ramie biological degumming method, which solves the problems of high residual glue rate after degumming, low breaking strength and low production rate in the existing ramie degumming method

Method used

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  • Online ramie biological degumming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, including pretreatment step and fermentation step;

[0027] Pretreatment step: with 500kg of dried ramie raw hemp, at a temperature of 0°C, use 5 × 10 4 The pressure of Pa is rubbed, and then the raw hemp after rubbing is put into the pretreatment tank, and kept at a temperature of 80°C for 150s to obtain pretreated hemp;

[0028] Fermentation steps: Take the pretreated hemp out of the pretreatment tank, put it into the fermenter, inject 4.5t of water, the mass ratio of water to pretreated hemp is 9:1; adjust the temperature of the fermenter to 25°C, add 45kg of bacteria liquid, constitute the fermentation liquid, and the concentration of the bacterial liquid is 2×10 10 cfu / mL, the mass ratio of bacterial liquid to water in the fermenter is 0.01:1; adjust the initial pH value of the fermented liquid to 5.0, feed air into the fermented pot for fermentation, and control the dissolved oxygen in the fermented liquid during the fermentation process to 5%, the...

Embodiment 2

[0031] Embodiment 2, including pretreatment step and fermentation step;

[0032] Pretreatment step: 500kg of dried ramie raw hemp, at a temperature of 35°C, use 1 × 10 5 The pressure of Pa is rubbed, and then the raw hemp after rubbing is put into a pretreatment tank, and kept at a temperature of 100°C for 80s to obtain pretreated hemp;

[0033] Fermentation steps: Take the pretreated hemp out of the pretreatment tank, put it into the fermenter, inject 6t of water, the mass ratio of water to pretreated hemp is 12:1; adjust the temperature of the fermenter to 32°C, add 480kg of bacterial liquid , constitute the fermentation liquid, the concentration of the bacterial liquid is 1×10 8 cfu / mL, the mass ratio of bacterial liquid to water in the fermenter is 0.08:1; adjust the initial pH value of the fermented liquid to 6.5, feed air into the fermented pot for fermentation, and control the dissolved oxygen in the fermented liquid during the fermentation process to 22%, the bacteri...

Embodiment 3

[0036] Embodiment 3, including pretreatment step and fermentation step;

[0037] Pretreatment step: with 500kg of dried ramie raw hemp, at a temperature of 70°C, use 2×10 5 The pressure of Pa is rubbed, and then the raw hemp after rubbing is put into a pretreatment tank, and kept at a temperature of 130°C for 5s to obtain pretreated hemp;

[0038] Fermentation steps: Take the pretreated hemp out of the pretreatment tank, put it into the fermentation tank, inject 7.5t of water, the mass ratio of water to pretreated hemp is 15:1; adjust the temperature of the fermentation tank to 38°C, add 1.125t of Bacterial liquid, constitutes the fermentation liquid, the concentration of the bacterial liquid is 5×10 5 cfu / mL, the mass ratio of bacterial liquid to water in the fermenter is 0.15:1; adjust the initial pH value of the fermented liquid to 8.0, feed air into the fermented pot for fermentation, and control the dissolved oxygen in the fermented liquid during the fermentation process...

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Abstract

The invention relates to an online ramie biological degumming method, belongs to ramie degumming methods, and solves the problems of high residual gum content, low breaking strength and low pull rate after degumming in the conventional degumming method. The method comprises the following steps of (1) preprocessing: standing dried raw ramie at the temperature of between 80 and 130 DEG C after pressurizing and rubbing the dried raw ramie to obtain preprocessed ramie; and (2) fermenting: placing the preprocessed ramie into fermentation liquor which consists of water and seed nutrient solution of Bacillus licheniformis Hg-1; regulating the initial pH value and dissolved oxygen of the fermentation liquor; adding nitrogen source and an antifoaming agent after the fermentation; stopping the fermentation after continuously fermenting for 1 to 8 hours; and boosting the pressure of a fermentation tank, and then lowering pressure to the normal pressure to finish the degumming process. The online ramie biological degumming method solves the problems of long degumming time, complicated process, low degumming efficiency, and low quality, high gum residual content and low breaking strength of degummed ramie; and the products meet the qualification of first class degummed ramie of GB / T20793-2006.

Description

technical field [0001] The invention belongs to a ramie degumming method, in particular to an online ramie biological degumming method. Background technique [0002] Ramie, scientific name Boehmeria nivea (L.) Gaudich., also known as ramie, white hemp, round hemp, green hemp, is a perennial herb and is an important textile fiber crop. Ramie bast has long single fiber, maximum strength, fast moisture absorption and moisture dissipation, good thermal conductivity, white and mercerized after degumming, can be purely spun, and can also be blended with cotton, silk, wool, chemical fiber, etc. Grass cloth, a pure handmade product of ramie fiber, was listed as Kampot in the past due to its long fiber, strong strength and good air permeability. It also won the gold medal of the Paris International Exposition in the 1930s. [0003] There is a groove-like cavity in the middle of the ramie fiber, the tube wall is porous, and is slender, tough, light in texture, and fast in absorbing a...

Claims

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Application Information

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IPC IPC(8): D01C1/04
Inventor 余龙江樊培何峰黎威
Owner HUAZHONG UNIV OF SCI & TECH
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