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Detoxification with reducing agents

一种还原剂、预处理的技术，应用在用添加化合物以刺激生长、生物燃料、发酵等方向

Active Publication Date: 2012-11-07
SEKAB E TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Several approaches have been proposed to address the problems associated with inhibitors

Method used

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Examples

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Embodiment Construction

[0011] As a first aspect of the present invention there is provided a method for reducing fermentation inhibition in a process for the production of a chemical of interest from pretreated cellulosic material comprising enzymatic hydrolysis of the pretreated cellulosic material and fermentation of hydrolyzed material,

[0012] Therein, the fermentation inhibition of the material subjected to fermentation is reduced by adding at least one reducing agent to the pretreated material or the hydrolyzed material.

[0013] "Fermentation" is a process known to those skilled in the art, and is generally performed by microorganisms.

[0014] "Fermentation inhibition"refers to a negative effect on a fermentation reaction, for example, reducing the rate of a fermentation reaction or the total amount of target product produced in a fermentation reaction. Thus, "reducing fermentation inhibition" means reducing such negative effects. Thus, reducing fermentation inhibition may be detoxificati...

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Abstract

The present invention provides a method for decreasing the fermentation inhibition in a process for producing a target chemical from a pretreated cellulosic material, the process comprising enzymatic hydrolysis of the pretreated cellulosic material and fermentation of hydrolysed material, wherein the fermentation inhibitory properties of the material subjected to fermentation is decreased by an addition of at least one reducing agent to the pretreated material or hydrolysed material. Moreover, the present invention provides the use of dithionite for decreasing the fermentation inhibitory properties of a material being subjected to simultaneous enzymatic hydrolysis and fermentation.

Description

technical field [0001] The present invention relates to a method for reducing the fermentation inhibitory effect of a slurry or hydrolyzate during fermentation. Background technique [0002] Biorefineries, which produce commodities from renewable resources, offer an alternative to oil refineries based on dwindling oil supplies and allow for the development towards improved energy security. Lignocellulosic residues from forestry and agriculture are attractive as feedstock because they are abundant, relatively cheap, and not used for food. Lignocellulose is mainly composed of lignin and two polysaccharides (cellulose and hemicellulose). Polysaccharides can be hydrolyzed to sugars and converted to various fermentation products such as bioalcohols in processes based on biocatalysts such as the industrially important baker's yeast (Saccharomyces cerevisiae). [0003] Hydrolysis of cellulose is typically preceded by a pretreatment in which the hemicellulose is degraded and makes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12P19/14C12N1/38
CPCC12P7/10Y02E50/16C12P19/14C12N1/38C12P2203/00Y02E50/10
Inventor L.琼森B.阿尔里克森A.卡夫卡
Owner SEKAB E TECH
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