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Selenium-rich yeast and preparation method thereof

A technology of selenium-enriched yeast and inorganic selenium, applied in the field of food processing, can solve the problems of high environmental protection costs, pollution, serious problems, etc., and achieve the effect of balanced nutrition, easy digestion and absorption, and rich nutrition

Active Publication Date: 2014-07-09
ANGELYEAST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selenium-enriched yeast in the prior art mainly uses molasses as a raw material for expanded cultivation, but the pollution of molasses as a raw material is relatively serious, which makes the environmental protection cost high, and the selenium content in the obtained selenium-enriched yeast is only 1000-2000ppm, which is not enough to meet people's needs

Method used

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  • Selenium-rich yeast and preparation method thereof
  • Selenium-rich yeast and preparation method thereof
  • Selenium-rich yeast and preparation method thereof

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preparation example Construction

[0017] The invention provides a preparation method of selenium-enriched yeast, which includes the steps of gradually expanding and culturing yeast strains, fermenting and culturing, collecting yeast cells and drying and crushing; wherein, in the fermenting and culturing step, hydrolyzed sugar is used as a carbon Selenium yeast culture, selenium-enriched yeast culture includes amino acid, selenium salt and nutrient element salt.

[0018] By using hydrolyzed sugar as a carbon source in the fermentation process, and adding selenium-enriched yeast cultures including amino acids, selenium salts and nutrient element salts during the fermentation process, the selenium content in the prepared selenium-enriched yeast is as high as 3000ppm. Balanced and rich, easy to digest and absorb. The preparation method has simple process, low raw material price, and can be produced on a large scale. In addition, when preparing selenium-enriched yeast with high selenium content, the pressure of env...

Embodiment 1

[0033] The baker's yeast strain (commercially available product) stored in liquid nitrogen was activated on YPD medium, and after 48 hours of constant temperature cultivation at 30°C, it was stored in a refrigerator at 4°C for later use.

[0034] Gradually expand the obtained strains into 60-ton seed tanks with Erlenmeyer flasks and Karl Fischer flasks. The culture medium is put into a 300-ton fermenter, and after the bleaching powder is sterilized, the prepared seeds are put into the fermenter by the differential pressure method for fermentation and cultivation. Calculating that the amount of inoculated yeast is 6500L, it is 27% hydrolyzed sugar, 17% ammonia water and 10% sodium selenite solution added to the culture medium, wherein the hydrolyzed sugar is Add 15ml / hour per liter of fermentation broth, then the total amount added is 79 cubic meters; ammonia water is added at 0.25ml / hour per liter of fermentation broth, then the total amount added is 2.2 cubic meters; Liquid ...

Embodiment 2

[0039] The baker's yeast strain preserved in liquid nitrogen was activated on YPD medium, and after 48 hours of constant temperature cultivation at 30°C, it was stored in a refrigerator at 4°C for later use.

[0040] Gradually expand the obtained strains into 60-ton seed tanks with Erlenmeyer flasks and Karl Fischer flasks. The culture medium is put into a 300-ton fermenter, and after the bleaching powder is sterilized, the prepared seeds are put into the fermenter by the differential pressure method for fermentation and cultivation. Calculated on the basis that the amount of inoculated yeast is 7500L, add hydrolyzed sugar with a mass ratio concentration of 27% and ammonia water with a mass ratio concentration of 17% to the medium, wherein the hydrolyzed sugar is added at 42ml / hour per liter of fermentation broth, then add The total amount is 79 cubic meters; ammonia water is added at a rate of 0.25ml / hour per liter of fermentation medium, and the total amount added is 2.6 cub...

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Abstract

The invention discloses a selenium-rich yeast and a preparation method thereof. The method comprises: performing step-by-step enlargement culture on yeast strain, performing fermentation culture, collecting yeast cells, drying and crushing, wherein in the step of fermentation culture, hydrolyzed sugar is taken as a carbon source and selenium-rich yeast culture is added, and the selenium-rich yeast culture comprises amino acid, a selenium salt and nutrient element salts. By adding hydrolyzed sugar as the carbon source during fermentation culture and adding the selenium-rich yeast culture comprising amino acid, the selenium salt and the nutrient element salts during fermentation, the prepared yeast has a selenium content up to 3000 ppm or more, and is balanced and abundant in nutrition and easy for digestion and absorption. The preparation method is simple in technology, low in raw material price and applicable to large-scale production. Additionally, when the selenium-rich yeast with a high selenium content is prepared, the pressure of environment-friendly processing of wastewater is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a selenium-enriched yeast and a preparation method thereof. Background technique [0002] Selenium is an essential trace element for the human body and has important physiological functions. It can prevent and inhibit tumors, resist aging, maintain the normal structure and function of the cardiovascular system, prevent arteriosclerosis and coronary heart disease, and has anti-oxidation and anti-tumor properties. and enhance immunity. Studies have shown that organic selenium stays in the body for a long time. When the nutritional status of human selenium is good, organic selenium can be stored. When the nutritional intake of selenium is insufficient, the stored organic selenium can be supplemented in physiological metabolism, thereby meet selenium requirements. Inorganic selenium (such as selenite and selenate) enters the human body and is quickly excreted from the body ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/18C12R1/865
Inventor 朱昌雄俞学锋李知洪余明华姚鹃李啸李瑞丰
Owner ANGELYEAST CO LTD
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