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Method for co-producing butanol and hydrogen by utilizing lignocellulose biomass

A technology of lignocellulose and biomass, which is applied in the field of efficient resource utilization of organic solid waste, can solve the problems of low substrate conversion efficiency, incomplete substrate fermentation, and high substrate cost, and achieve energy conversion efficiency improvement and low cost. The effect of reducing and increasing butanol production

Active Publication Date: 2014-10-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0006] The present invention solves the problems of high substrate cost, incomplete substrate fermentation and low substrate conversion efficiency in the existing fermentation butanol production process, and provides a method for co-producing butanol and hydrogen using lignocellulosic biomass

Method used

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  • Method for co-producing butanol and hydrogen by utilizing lignocellulose biomass

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specific Embodiment approach

[0020] Specific embodiments: the present embodiment utilizes lignocellulosic biomass to co-produce the method for butanol and hydrogen according to the following steps:

[0021] 1. Lignocellulose is pretreated: the hemicellulose in lignocellulose is made into soluble xylose liquid to obtain hemicellulose xylose liquid and solid;

[0022] 2. The solid pretreated in step 1 is hydrolyzed with cellulase by enzymatic hydrolysis and saccharification method, and after concentration, glucose hydrolyzate is obtained;

[0023] Three, get the microorganism that can utilize glucose to produce butanol, place in the butanol fermenter that contains butanol medium, ferment and produce butanol, obtain the fermented liquid that contains butanol, then the fermented liquid that contains butanol is dehydrated through distillation, Obtain butanol with a mass percentage of 10-15%, and collect the butanol fermentation residue after distillation and dehydration for subsequent use;

[0024] 4. Add the...

specific Embodiment approach 2

[0032]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the lignocellulose described in step 1 is pretreated as follows: the lignocellulose and the HCl solution with a mass percentage of 1 to 2% are pressed Mix at a solid-to-liquid ratio of 1g:10mL, treat at 80-120°C for 1-2 hours, and centrifuge to obtain hemicellulose xylose liquid and solid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the amount of cellulase described in step two is added to the enzyme solution according to 30 ~ 50U / (g pretreated solid substrate), at 50 Under the condition of 150-200 r / min, the enzyme hydrolysis is carried out for 48 hours at the temperature of ℃, and the glucose hydrolyzate is obtained. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for co-producing butanol and hydrogen by utilizing lignocellulose biomass and relates to a method for producing the butanol and the hydrogen. The method is used for solving the problems that the substrate cost is high, the substrate fermentation is not thorough and the substrate conversion efficiency is low in existing butanol producing fermentation processes. According to the method, cheap renewable organic waste lignocellulose serves as a substrate; glucose hydrolysate obtained after treatment is used for butanol producing fermentation, the butanol and the hydrogen are collected in the process; the unused carbohydrate residual after the butanol fermentation and hemicellulose xylose liquid generated in the pretreatment process of the lignocellulose are continued to be used and converted into the product hydrogen in a hydrogen producing reactor; in the meantime, acetic acid and butyric acid generated in hydrogen producing fermentation residual liquor can flow back to a butanol producing fermentation system to increase the butanol yield. The method disclosed by the invention has the advantages that the conversion efficiency of the substrate and the energy recovery rate of the system are increased; in the meantime, the environmental influence caused by waste liquid residual after purely producing the butanol or the hydrogen is greatly reduced; the method has important significance in energy and environment fields.

Description

technical field [0001] The invention relates to a method for using lignocellulosic biomass to co-produce butanol and hydrogen, belonging to the field of efficient resource utilization of organic solid waste. Background technique [0002] The depletion of fossil energy reserves and continuous environmental pollution in the world today have become important issues facing the world. With population growth and economic development, global energy demand will continue to rise in the future. The dual crises of energy and environment have prompted countries all over the world to actively develop and utilize renewable biomass resources to produce fuel energy products. At present, the development of biomass energy mainly includes two aspects: [0003] 1) In terms of products, fuel ethanol is currently the main product, but ethanol is not an ideal biomass energy source. Its energy density is low, and it is easy to absorb moisture in the environment. It is highly corrosive and is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/16C12P3/00C12R1/145C12R1/01
CPCY02P20/59
Inventor 曹广丽杨谦王振宇赵磊姜成郑炬付德丰
Owner HARBIN INST OF TECH
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