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Combined pretreatment method for efficiently separating bagasse biomass components

A biomass and pretreatment technology, applied in the direction of biofuel, fermentation, etc., can solve the problems of poor separation effect, insufficient industrialization potential, low conversion efficiency and comprehensive utilization rate, so as to reduce consumption, equipment investment and construction cost High, fast pretreatment effect

Inactive Publication Date: 2012-12-19
GUANGZHOU YOURUI BIOSCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a new combined pretreatment process for the bottlenecks such as poor separation effect, low conversion efficiency and comprehensive utilization rate, and insufficient industrialization potential commonly found in the current lignocellulose production route of ethanol.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The combined pretreatment method for efficient separation of bagasse biomass components described in this embodiment mainly includes the following steps:

[0030] (1) Weigh 100g of bagasse with a water content of 12%, add 3000mL of dilute sulfuric acid with a concentration of 1% according to the solid-to-liquid ratio (W / V) of 1:30, stir and soak for 60min, and filter and separate;

[0031] (2) Put the pre-soaked bagasse into a steam explosion tank for steam explosion treatment, the steam pressure is 1.5MPa, the maintenance time is 10min, the pressure is released instantly, separated and collected;

[0032] (3) Add the steam-exploded bagasse according to the solid-to-liquid ratio (W / V) 1:10, add 1000mL of 45℃ hot water to wash out the soluble hydrolyzate, wash 3 times for 10min each time, and filter and separate; the washing solution is neutralized, decolorized, Conventional processes such as concentration, ion exchange to remove impurities, and crystallization can pr...

Embodiment 2

[0036] The combined pretreatment method for efficient separation of bagasse biomass components described in this embodiment mainly includes the following steps:

[0037] (1) Take 200g of bagasse with a water content of 8%, add 12000mL of dilute sulfuric acid with a concentration of 0.1% according to the solid-to-liquid ratio (W / V) of 1:60, stir, soak for 20min, and filter and separate;

[0038] (2) Put the pre-soaked bagasse into a steam explosion tank for steam explosion treatment, the steam pressure is 2.2MPa, the maintenance time is 2min, the pressure is released instantly, separated and collected;

[0039] (3) Add the steam-exploded bagasse according to the solid-to-liquid ratio (W / V) of 1:30, add 6000mL of 70℃ hot water to wash out the soluble hydrolyzate, wash once for 10 minutes each time, filter and separate, and the washing liquid is neutralized, decolorized, Xylose can be produced through processes such as concentration, ion exchange to remove impurities, and cr...

Embodiment 3

[0043] The combined pretreatment method for efficient separation of bagasse biomass components described in this embodiment mainly includes the following steps:

[0044] (1) Weigh 100g of bagasse with a water content of 9%, add 4000mL of dilute sulfuric acid with a concentration of 0.5% according to the solid-to-liquid ratio (W / V) of 1:40, stir, soak for 35min, and filter and separate;

[0045] (2) Put the pre-soaked bagasse into a steam explosion tank for steam explosion treatment, the steam pressure is 1.6MPa, the maintenance time is 8min, the pressure is released instantly, separated and collected;

[0046] (3) Add 2000mL of 60°C hot water to wash the soluble hydrolyzate with the steam-exploded bagasse at a solid-to-liquid ratio (W / V) of 1:20, wash the soluble hydrolyzate for 10 minutes each time, wash 3 times, filter and separate, and the washing liquid is neutralized, decolorized and concentrated , ion exchange to remove impurities, crystallization and other processe...

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Abstract

The invention discloses a combined pretreatment method for efficiently separating bagasse biomass components, which mainly comprises the following steps: preimpregnating in dilute sulfuric acid; carrying out steam explosion treatment; washing with hot water; extracting; and carrying out enzymolysis. In the combined pretreatment method disclosed by the invention, on the basis of different physicochemical properties and structural features of the three components (hemicellulose, cellulose and lignin) in the bagasse, the component hemicellulose is sufficiently degraded and separated by dilute acid preimpregnation-steam explosion pretreatment, thereby reserving most of the cellulose and lignin; and the lignin is extracted by using a lower alcohol-alkaline water system, leaving high-cellulose-content residues. On the premise of low concentration of the added enzyme, the invention obviously increases the enzymolysis rate, and raises the conversion rate and comprehensive utilization rate of the bagasse biomass resource.

Description

technical field [0001] The invention belongs to the field of biomass refining and biomass energy, and relates to a combined pretreatment method for lignocellulosic biomass raw materials, in particular to a combined pretreatment process for efficiently separating the three major components of biomass in bagasse, which significantly improves the enzymatic hydrolysis of bagasse rate and comprehensive utilization. Background technique [0002] With the depletion of fossil resources and the reduction of oil reserves, the world's energy issues are facing severe challenges, and the petrochemical industry closely related to it has also been greatly affected. It is predicted that the gap between my country's oil supply and demand will reach 360 million tons in 2020, and the dependence on foreign oil will reach 60%. Coupled with the environmental pollution and climate warming caused by the use of fossil resources, the development and utilization of green new energy, especi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/14C08H7/00C12P19/14C12P7/10
CPCY02E50/16C12P2201/00Y02E50/10
Inventor 刘立国杨尉
Owner GUANGZHOU YOURUI BIOSCI
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