A method for producing sugar by hydrolyzing concentrated mash of agricultural and forestry biomass raw materials

A biomass raw material, mash technology, applied in biofuel, fermentation and other directions, can solve the problems of difficult-to-concentrate mash enzymatic hydrolysis and saccharification, and achieve the effect of rich active groups, narrow distribution and high purity

Active Publication Date: 2021-02-26
JIANGNAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0007] In order to solve the problem that the current cellulosic raw materials are difficult to enzymatically hydrolyze and saccharify with thick mash, the present invention provides a method for producing sugar by hydrolyzing thick mash of agricultural and forestry biomass materials, comprising the following steps:

Method used

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  • A method for producing sugar by hydrolyzing concentrated mash of agricultural and forestry biomass raw materials

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Effect test

Embodiment 1

[0029] Sieve the collected air-dried bagasse to 5-20mm.

[0030]Then, 100 g of the bagasse and 1.4 kg of industrial glycerin were placed in a 5-liter three-neck flask, heated to 240° C. at a stirring rate of 250 rpm, and then kept for 10 minutes. After the reaction, cool to 100°C, add 1.5kg of boiling water for washing, stir mechanically, and continue cooling down to 50-60°C. Since glycerin is relatively dense and has a low viscosity, some removed lignin often sticks to the surface of the material and is not completely dissolved in glycerin. Therefore, boiling water is added to form glycerin aqueous solution, and mechanical stirring is added at the same time, which is more conducive to the dissolution of lignin. Then use the G4 sand core funnel to suction filter, then use tap water to elute and suction filter 2 times (each 2kg); content of 26%, lignin content of 13%, glycerin residue is 0.39% of the dry weight of the matrix, and the hemicellulose and lignin removal rates are ...

Embodiment 2

[0033] The collected bagasse is air-dried and sieved to collect materials within the range of 5-20mm.

[0034] Then, 100g of the above-mentioned pulverized bagasse and 1.0kg of the above-mentioned industrial glycerin are placed in a 5 liter three-necked flask cooking device, add 1ml of concentrated sulfuric acid (the amount of sulfuric acid added is 0.1%, w / v) and heat up, stir at 250rpm, and heat up to Keep warm and cook for 30 minutes at 230°C. After the reaction, cool to 100°C, add 1.5kg of boiling water, stir mechanically, cool down to 50-60°C, use G4 sand core funnel for suction filtration, filter residue is then eluted with 2kg tap water for suction filtration, and G4 sand core funnel for suction filtration once; The filter residue is glycerol crude cellulose, its quality is bagasse before pretreatment 57.9%, its cellulose content is 64%, hemicellulose content is 6.61%, lignin content is 18.14%, and glycerin residue is matrix dry weight 22.3%, half The removal rates of ...

Embodiment 3

[0037] Sieve the collected air-dried bagasse to 5-20mm.

[0038] Then, place the above-mentioned bagasse 100g and 1.4kg of the above-mentioned industrial glycerin solution in a cooking device, add 3g of sodium hydroxide (0.2% sodium hydroxide, w / w), stir and heat up at 200rpm, cook at 240°C for 10 minute. After the reaction, cool to 100°C, add 1.5kg of boiling water, stir mechanically, cool down to 50-60°C, filter with G4 sand core funnel, elute the filter residue with tap water at normal temperature, and suction filter with G4 sand core funnel twice (each time 2kg ); filter residue is glycerol crude cellulose, and its quality is 64% of bagasse before reaction, and its cellulose content is 58%, and hemicellulose content is 28%, lignin content 10%, and glycerin residue is matrix dry weight 0.47%, Correspondingly, the removal rates of hemicellulose and lignin were 20% and 70%, respectively. The filtrate is the glycerol treatment solution, which contains obvious glycerol glycos...

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Abstract

Provided is a method for producing sugar by hydrolyzing a thick mash of an agricultural and forest biomass raw material, comprising the following steps: (1) subjecting a cellulosic raw material to a digestion treatment in a glycerol phase, wherein a glycerol crude cellulose and a glycerol treatment liquid are obtained after separation; (2) recycling the above-mentioned collected glycerol treatment liquid in the digestion treatment in step (1) 7 to 11 times; and (3) hydrolyzing, by means of cellulase, the glycerol crude cellulose obtained in step (2) to obtain a fermentable sugar. The glycerol phase digestion treatment refers to a digestion temperature of 230ºC-270ºC at a gauge pressure of 0-5 atm and maintaining the temperature for 10-30 minutes; or the acid addition amount of 0.01%-0.3% (w / v) solution volume, a digestion temperature of 160ºC-240ºC at a gauge pressure of 0-5 atm and maintaining the temperature for 10-30 minutes; or the alkali addition amount of 0.01%-0.3% (w / v) solution volume, a digestion temperature of 160ºC-240ºC at a gauge pressure of 0-5 atm and maintaining the temperature for 10-30 minutes.

Description

technical field [0001] The invention relates to the technical fields of resource utilization of agricultural and forestry biomass raw materials and biomass chemical industry, in particular to a method for saccharification of concentrated mash of fibrous raw materials. Background technique [0002] With the increasingly prominent problems of resource and energy crisis, greenhouse effect and environmental pollution, biorefinery can fully replace bio-liquid fuels and bio-based chemicals produced by petrochemical production by using abundant agricultural and forestry cellulose biomass renewable resources. The current mainstream of the world's bioenergy industry. However, the real era of biomass economy has not yet been realized, and the biorefining technology of bioenergy and bio-based products from agricultural and forestry cellulosic biomass is still facing many bottlenecks, among which the lignocellulose-sugar platform (pretreatment, enzymatic hydrolysis and sugar fermentati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/14C12P7/10
CPCC12P7/10C12P19/14C12P2201/00Y02E50/10
Inventor 孙付保洪嘉鹏唐松周豪
Owner JIANGNAN UNIV
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