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Process for synchronously producing ethyl alcohol, xylooligosaccharide and lignin through straw enzymolysis and fermentation

A technology for xylo-oligosaccharides and lignin, which is applied in the fields of lignin and straw enzymatic hydrolysis and fermentation to simultaneously produce ethanol, cellulose fiber pulp, and xylo-oligosaccharides, can solve the problem of increased production costs, low product yield, environmental pollution, etc. problems, to achieve the effect of saving equipment costs, reducing process costs, and overcoming long time

Inactive Publication Date: 2018-11-06
黄军成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield of products obtained by microbial enzymatic hydrolysis of straw is low, the water consumption is high, the energy consumption is high, and a large amount of residue is produced, which not only increases the production cost, but also causes pollution to the environment.

Method used

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  • Process for synchronously producing ethyl alcohol, xylooligosaccharide and lignin through straw enzymolysis and fermentation

Examples

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Effect test

Embodiment 1

[0024] A process for simultaneous production of ethanol, xylooligosaccharides and lignin by enzymolysis and fermentation of straw ( figure 1 shown), including the following steps:

[0025] (1) Raw material pretreatment: Knead corn stalks and sorghum stalks into 4-8cm filaments with a kneading machine, and knead them softly without induration;

[0026] (2) Enzymatic hydrolysis: Add 1 kg of corn stalk cellulosic enzyme-04 to every 200 kg of pretreated corn stalks and sorghum stalks and mix evenly, then add water and pH buffer respectively, then pack them in sealed double-layer bags and store them indoors , the enzymolysis temperature is 2-30°C, the enzymolysis time is 7-150 days, and the pH value is ≤7;

[0027] (3) Separation: After the enzymolysis is completed, put the enzymolyzate directly into the vacuum pulp washer, separate the liquid from the cellulose pulp by squeezing and filtering, and send the liquid into a microfiltration device to extract lignin, and then send it t...

Embodiment 2

[0032] A process for simultaneous production of ethanol, xylooligosaccharides and lignin by enzymolysis and fermentation of straw ( figure 1 shown), including the following steps:

[0033] (1) Raw material pretreatment: Knead the barley straw and wheat straw into 4-8cm filaments with a kneading machine respectively, and knead them softly without induration;

[0034] (2) Enzymatic hydrolysis: add 1.3kg of wheat straw cellulosic enzyme-04 to every 200kg of pretreated barley straw and wheat straw and mix evenly, then add water and pH buffer solution respectively, and then pack them in sealed double-layer material bags. Storage, the enzymolysis temperature is 2-30°C, the enzymolysis time is 7-150 days, and the pH value is ≤7;

[0035] (3) Separation: After the enzymolysis is completed, put the enzymolyzate directly into the vacuum pulp washer, separate the liquid from the cellulose pulp by squeezing and filtering, and send the liquid into a microfiltration device to extract ligni...

Embodiment 3

[0040] A process for simultaneous production of ethanol, xylooligosaccharides and lignin by enzymolysis and fermentation of straw (figure 1 shown), including the following steps:

[0041] (1) Raw material pretreatment: Knead rice straw and grain straw into 4-8cm filaments with a kneading machine respectively, and knead them softly without induration;

[0042] (2) Enzymatic hydrolysis: add 1.3kg of rice straw cellulosic enzyme-04 to every 200kg of pretreated rice straw and grain straw and mix evenly, then add water and pH buffer solution respectively, and then pack it in a sealed double-layer material bag. Storage, the enzymolysis temperature is 2-30°C, the enzymolysis time is 7-150 days, and the pH value is ≤7;

[0043] (3) Separation: After the enzymolysis is completed, put the enzymolyzate directly into the vacuum pulp washer, separate the liquid from the cellulose pulp by squeezing and filtering, and send the liquid into a microfiltration device to extract lignin, and then ...

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Abstract

The invention discloses a process for synchronously producing ethyl alcohol, xylooligosaccharide and lignin through straw enzymolysis and fermentation. The process comprises the following steps: (1),raw material pretreatment; (2), enzymolysis; (3), separation; (4), distilling and nanofiltration; (5), reverse osmosis purification. According to the process for synchronously producing ethyl alcohol,xylooligosaccharide and lignin through straw enzymolysis and fermentation, the bio-enzyme conversion technology and the membrane separation technology are organically combined, and all plant straw cellulosic enzyme can destroy the complex structures of straws, so that the enzymolysis efficiency is improved, the membrane separation process is simple, energy consumption is low, and producing various products synchronously can be achieved. Therefore, crop straw resources are used maximally, and good economic benefits are produced.

Description

technical field [0001] The invention relates to the technical field of biochemical industry, in particular to a process for synchronous production of ethanol, xylooligosaccharides, lignin and cellulose fiber pulp by enzymolysis and fermentation of straw. Background technique [0002] With the rapid development of economy and society, resource consumption is getting faster and faster, and the shortage of resources has become a serious problem restricting global development. About 866.6 billion tons of plant organic matter is formed on the earth every year, which is the most widely distributed, most abundant, cheap and underutilized renewable resource in nature. The transformation of plant fiber waste into energy and chemical products through biotechnology has far-reaching significance for solving the energy crisis. [0003] In recent years, the technology of using microorganisms to enzymatically hydrolyze straw to extract polysaccharides and convert polysaccharides into alco...

Claims

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Application Information

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IPC IPC(8): C12P7/10C12P19/14C12P19/12C12P19/00C08H7/00
CPCC08H6/00C12P7/10C12P19/00C12P19/12C12P19/14Y02E50/10
Inventor 黄军成王江英黄源
Owner 黄军成
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