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A kind of inhibition method of geosmin in Daqu

A kind of earthy element and Daqu technology, applied in the field of microorganisms, can solve the problems of inability to use, destroy the microecological structure, affect the aroma and quality of liquor, and achieve the effect of obvious decline.

Active Publication Date: 2021-01-29
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the method of removing Streptomyces in Daqu by adding chemically synthesized antibiotics to prevent earthy odor cannot be applied to the actual production process
This is because the addition of antibiotics on the one hand causes a huge risk in food safety, and on the other hand, antibiotics can also destroy the micro-ecological structure of beneficial wine-producing and aroma-producing microorganisms in Daqu, thereby affecting the aroma and quality of liquor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Specific steps are as follows:

[0034] (1) Pick a single colony of Bacillus licheniformis (Bacillus licheniformis) CGMCC No: 3963 and inoculate it in the culture medium for 20 hours at 37°C and 220 r / min to obtain Bacillus licheniformis (Bacillus licheniformis) CGMCC No: 3963 bacterial liquid; Bacillus licheniformis (Bacillus licheniformis) CGMCCNo: 3963 bacteria solution was centrifuged and resuspended in a protective agent containing 100g / L skimmed milk powder to a bacterial concentration of 1×10 8 CFU / mL, obtain Bacillus licheniformis (Bacillus licheniformis) CGMCC No: 3963 bacterial suspension;

[0035] Pick a single colony of Bacillus pumilus (Bacillus pumilus) CCTCC No: M2013372 and inoculate it in the culture medium for 20 hours at 37°C and 220 r / min to obtain a bacterial liquid of Bacillus pumilus (Bacillus pumilus) CCTCC No: M2013372; Bacillus pumilus CCTCC No: M2013372 bacteria solution was centrifuged and resuspended in a protective agent containing 100g / L ...

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Abstract

The invention discloses a method for inhibiting geosmin in Daqu, belonging to the technical field of microorganisms. The present invention inhibits the production of soil in Daqu by adding microbial agents containing Bacillus licheniformis, Bacillus pumilus, Saccharomyces cerevisiae and Lactobacillus breris in Daqu. The microorganisms of skatoin greatly reduce the content of geosmin in Daqu, so that the content of geosmin in Daqu obtained by adding the microbial inoculum of the present invention is as low as 3.4 μg / kg, which is different from that of Daqu obtained without adding the microbial inoculum of the present invention. Compared with the average drop of about 70%, the drop is obvious.

Description

technical field [0001] The invention relates to a method for inhibiting geosmin in Daqu, belonging to the technical field of microorganisms. Background technique [0002] Liquor is a kind of distilled liquor unique to my country, and is deeply loved by consumers. Its unique open multi-strain solid-state fermentation and solid-state distillation mode endows liquor with a unique aroma. However, the earthy smell in the liquor greatly reduces the aroma and quality of the liquor, and the rate of high-grade products is reduced. Therefore, liquor production enterprises suffer huge economic losses of up to hundreds of millions of yuan every year. [0003] Although the existing technical means, including physical adsorption, can remove the earthy odor in Daqu to a certain extent, this method is not only time-consuming, labor-intensive and costly, but also can non-specifically adsorb beneficial aroma components at the same time. Aroma and quality have a negative impact. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C12N1/18C12G3/02C12R1/10C12R1/07C12R1/865C12R1/24C12R1/47
Inventor 徐岩杜海杜小威赵景龙韩英王晓勇
Owner JIANGNAN UNIV
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