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Method for processing straw through plasma

A plasma and low-temperature plasma technology, applied in the field of lignocellulose pretreatment, can solve the problems of high-temperature plasma temperature, unfixed gas composition, and difficult separation and purification, and achieve low raw material consumption and straw cellulose loss rate Low, easy glycation effect

Active Publication Date: 2011-10-12
安徽同速科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Zhao Zengli, Guangzhou Institute of Energy, Chinese Academy of Sciences, etc. (Chinese patent CN1420155A publication date 2003.5.28) use hydrogen, CH 4 Or water vapor is ionized into high-temperature plasma in a DC arc plasma generator, and biomass is pyrolyzed to produce syngas. This method improves gasification efficiency and gas grade, and completely eliminates tar, but the temperature of the formed high-temperature plasma is relatively low. High energy consumption, and the gas composition after gasification is not fixed, so separation and purification are difficult; Chinese patent application (90101614.4) uses nitrogen and nitrogen-hydrogen mixed gas as the working gas, and directly sprays black liquor into the plasma flame area for Thermal decomposition reaction to obtain solid powder and combustible gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Cut the straw straw to 0.5-2 cm, take 100 grams, put it into the plasma generator, evacuate to a pressure of 5Pa, and feed the working gas argon; glow discharge treatment for 20 minutes; then, in Treat with 0.5mol / L dilute lye for 5 hours at 50°C to obtain 61.9 grams (dry weight) of lignocellulose, with a lignin stripping rate of 58%; and then use Trichoderma viride (Trichoderma viride) ZY-1 solid-state fermentation to produce 50 FPIU / g substrate is selected, the solid-liquid ratio is 1:8, saccharification and degradation are carried out at 50 DEG C for 24 hours, the reaction is terminated, and the saccharification solution is extracted to obtain (converted) 54.2 grams of reducing sugar.

Embodiment 2

[0024] Example 2: Cut the rice straw to 0.5-2 cm, take 100 grams, put it into the plasma generator, and pass through the working gas argon; then, 100 Pa, dielectric barrier discharge for 1 minute; then, at 50 ° C Treat with 0.5mol / L dilute lye for 5 hours to obtain 59.5 grams (dry weight) of lignocellulose, and the lignin stripping rate is 51.4%; then utilize the cellulose produced by solid-state fermentation of Trichoderma viride (Trichoderma viride) ZY-1 Carry out saccharification and degradation with enzyme to produce reducing sugar, select 50FPIU / g substrate, solid-liquid ratio is 1:8, saccharification and degradation at 50°C for 24 hours, stop the reaction, extract the saccharification solution, and obtain (equivalent) 52.2 grams of reducing sugar.

Embodiment 3

[0025] Embodiment 3: Cut the straw straw to 0.5-2 cm, take 100 grams, put it into the plasma generator, evacuate to a pressure of 10 Pa, and pass in the working gas argon; then turn on the jet discharge device and treat for 10 minutes; Then, treat it with 0.5mol / L dilute lye for 5 hours at 50°C to obtain 57.6 grams (dry weight) of lignocellulose, and the lignin exfoliation rate is 61%; The cellulase produced by solid-state fermentation is saccharified and degraded to produce reducing sugar. Select 50FPIU / g substrate, the solid-liquid ratio is 1:8, saccharified and degraded at 50°C for 24 hours, terminate the reaction, extract the saccharification liquid, and obtain (converted) reducing sugar 50.8 grams.

[0026] Reference example (SO 3The method of processing rice straw): crush the rice straw to 20-80 mesh, take 100 grams, put it into a 500mL flask, and feed a mixed gas of 20% v / v sulfur trioxide and air in a water bath at 70°C to the pressure inside the bottle ≤0.1MPa, keep...

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Abstract

The invention relates to a method for processing straw through low-temperature plasma, and the method comprises the following steps: firstly placing the straw into a plasma generator, introducing working gas, performing discharge at low air pressure or atmospheric pressure so as to form the low-temperature plasma, and bombarding the straw through the plasma; and soaking the straw which is bombarded by the plasma into a diluted alkaline water solution, and processing for getting lignocellulose. The pre-processing process is simple, the cellulose loss is low, the produced cellulose can be saccharified easily, and waste water can be avoided almost. Prepared saccharificaion solution does not inhibit follow-up fermentation, can be used for producing ethanol, butanol, butyric acid, lactic acid and other chemical products by virtue of fermentation, and can also be directly used for preparing feed sugar or feed protein and the like.

Description

technical field [0001] The invention relates to the field of lignocellulose pretreatment, in particular to a method for plasma treatment of straw. Background technique [0002] With the rapid development of the world economy, energy and environmental issues have become increasingly prominent. This has led to more and more people's attention shifting to the development and utilization of renewable energy and biomass chemicals. The famous American magazine "USA Today" once pointed out that "farmland crops may gradually replace petroleum as a material from fuel to plastics." source, 'black gold' may be replaced by 'green gold'." At present, most of the biofuels are prepared with grain as raw material, resulting in a shortage of grain and rising prices, so researchers have turned their attention to lignocellulosic biomass as a raw material for the production of biofuels. However, due to the existence of lignin, the complex structure of this kind of raw materials makes it resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/30D21C5/00
Inventor 姚日生李凤和邓胜松胡华佳张遥姚力蓉
Owner 安徽同速科技有限公司
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