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Method for refining xylitol fermentation liquor

A technology for xylitol and fermentation broth, applied in the field of refining xylitol fermentation broth, can solve problems such as environmental pressure, consumption of large acid and alkali, and achieve the effects of reducing pressure, increasing yield, and increasing ion exchange capacity

Active Publication Date: 2010-10-20
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the production of xylitol in China, biomass materials containing polypentose, such as corncobs, straw, bagasse, and bamboo, are generally used as raw materials. After acidolysis, the acid solution is decolorized, filtered, deacidified, and concentrated. Finally, xylose liquid is obtained, and then biologically fermented, the fermentation liquid is sterilized and concentrated to obtain xylitol liquid, and then the xylitol liquid is decolorized, deashed, concentrated, and crystallized to separate xylitol, and the decolorization process mostly uses powder carbon Or granular carbon column decolorization, consumes a lot of acid and alkali and produces a lot of waste residue, causing huge pressure on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of xylitol fermentation liquid: take corn cob as raw material, after impurity removal, rinsing, hot water washing, dilute sulfuric acid washing, sulfuric acid hydrolysis to obtain sulfuric acid hydrolyzate, and then sulfuric acid hydrolyzate is refined and passed through genetically engineered yeast After 48 hours of fermentation, xylitol fermented liquid was obtained as a raw material, wherein the fermented liquid contained a large amount of genetically engineered bacteria, dry yeast accounted for 1.9% (g / dl) of the fermented liquid, and xylitol 10% (g / dl) ), arabinose 2.4% (g / dl), xylose 0.46% (g / dl), and a small amount of inorganic salts.

[0032] Described xylitol fermented liquid is refined according to the following steps:

[0033] 1) Pass the xylitol fermentation broth through a 5 μm coarse filter to remove mechanical impurities such as solid particles;

[0034] 2) Pass the xylitol fermentation broth obtained above through a flat ultrafiltration memb...

Embodiment 2

[0045] Preparation of xylitol fermentation broth:

[0046] Take corncobs as raw material, remove impurities, rinse, wash with hot water, wash with dilute sulfuric acid, and hydrolyze with sulfuric acid to obtain sulfuric acid hydrolyzate, then refine the sulfuric acid hydrolyzate and ferment with genetically engineered yeast for 48 hours to obtain xylitol Fermentation liquid is used as raw material, wherein, in addition to containing a large amount of genetically engineered bacteria in the fermentation liquid, dry yeast accounts for 1.8% of the fermentation liquid, mainly containing 11.2% xylitol, 2.2% arabinose, 0.3% xylose, and a small amount of Inorganic salt composition.

[0047] Described xylitol fermented liquid is refined according to the following steps:

[0048] 1) Pass the xylitol fermentation liquid through a 10 μm coarse filter to remove mechanical impurities such as solid particles and prevent damage to the membrane;

[0049] 2) Pass the xylitol fermentation bro...

Embodiment 3

[0060] Preparation of xylitol fermentation liquid: Preparation of xylitol fermentation liquid: take corncob as raw material, after impurity removal, rinsing, hot water washing, dilute sulfuric acid washing, sulfuric acid hydrolysis to obtain sulfuric acid hydrolyzate, and then sulfuric acid hydrolysis After the liquid is refined, it is fermented by genetically engineered yeast for 48 hours to obtain a xylitol fermentation liquid as a raw material. In addition to a large amount of genetically engineered bacteria in the fermentation liquid, dry yeast accounts for 2.0% of the fermentation liquid and mainly contains xylitol 12.1%, arabinose 2.6%, xylose 0.5%, and a small amount of inorganic salts.

[0061] Described xylitol fermented liquid is refined according to the following steps:

[0062] 1) Pass the xylitol fermentation liquid through a 10 μm coarse filter to remove mechanical impurities such as solid particles and prevent damage to the membrane;

[0063] 2) Pass the xylito...

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Abstract

The invention relates to a method for refining xylitol fermentation liquor, which comprises the following steps: filtering the xylitol fermentation liquor to remove mechanical impurities; removing thallus by using a platy ultrafiltration membrane; decolorizing by using an ultrafiltration wound membrane and a particulate carbon pile; and finally carrying out ion exchange to refine the xylitol fermentation liquor. Compared with the prior art, by adopting a decolorizing membrane to decolorize in the invention, the yield is greatly improved and the decolorizing efficiency is improved to 99-100 percent; the adoption of the decolorizing membrane is beneficial to the subsequent ion exchange and greatly improve the capacity of the ion exchange; and in addition, no waste residue is generated and the pressure on the environment can be reduced.

Description

technical field [0001] The invention relates to the technical field of biochemical industry, in particular to a method for refining xylitol fermentation liquid. Background technique [0002] Xylitol is a five-carbon sugar alcohol, which is a normal intermediate product of xylose metabolism. It is a crystalline white powder and widely exists in fruits, vegetables, cereals, mushrooms and other foods, as well as wood, straw, corncobs and other plants. . It can be used as a sweetener, nutrient and medicine, and is widely used in chemical, food, pharmaceutical and other industries. [0003] At present, in the production of xylitol in China, biomass materials containing polypentose, such as corncobs, straw, bagasse, and bamboo, are generally used as raw materials. After acidolysis, the acid solution is decolorized, filtered, deacidified, and concentrated. Finally, xylose liquid is obtained, and then biologically fermented, the fermentation liquid is sterilized and concentrated t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/18C07C29/76
Inventor 李荣杰薛培俭尚海涛邓远德张雪锋李倩
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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