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An important feature is the use of renewable wood fiber, we can preprocess the operation, reuse can achieve energy, reduces production cost. The wood fiber pretreatment is a process of transformation, we usually by several methods to achieve.
Chemical method: using various chemical reagents (including water) of lignocellulose pretreatment methods to improve the efficiency of cellulase hydrolysis. At present, the chemical method is still the main method of cellulose pretreatment process.
Physical method: mainly through the method of physical machinery such as milling and grinding and other traditional processing methods to reduce the fineness, increase the surface area, in addition to ultrasonic irradiation pretreatment methods, to change the structure of cellulose, susceptible to cellulase catalytic purpose.
The physical and chemical method: a combination of chemical and physical and mechanical (suddenly bring pressure relief blasting force) effect will destroy the cell wall structure of raw materials, improve the cellulose accessibility method.
Biological method: commonly used in lignocellulose pretreatment is mainly conducted in nature that can degrade lignin microorganisms, mainly fungi (such as white rot, brown rot and soft rot), they can degrade lignin lignin, enzyme hydrolysis lignocellulose pretreatment method is introduced to promote the follow-up.
There are several classes of wood fiber including fiber length, density, purity, fiber length from 10um to 2000um. The wood fiber density is about 0.8 - 1.3 g / cm3. Wood fiber is very strong, the fiber surface is also very similar to asbestos, and completely harmless. Quality inspection of wood fiber usually includes the following aspects.
The relative density of wood fiber because the material is light, and the inner part of the water absorbing fiber, dissolved substances, so the determination of relative density when demand by another known relative density of liquid transformation.
PH value: 5g oil immersed fiber weighing, weighing not less than 5min, after removing the oil absorbing fiber quality through, into a small screen made by the filter, filter aperture is 0.5mm, in a shaking machine on the shaker 10min (shake 221 times per minute and 32mm, vibration 147 / min, amplitude 13mm).
Ash content: with residual ash after burning. The 2~3g sample is heated to 590~600 deg.c in less than 2h of the time, check the quality of residue after cooling.
Method for quality inspection of wood fiber
The above "wood fiber pretreatment method introduces the method of" quality inspection of wood fiber paper is about the content of the wood fiber pretreatment method is introduced, we read the article, if you understand With lignin fiber / Wood fiber, production equipment and more interested, please click our news list view.
The keywords: The pretreatment method of wood fiber cellulose