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Method for producing yeast powder by using beer waste yeast

A technology of beer waste yeast and yeast powder, which is applied in applications, animal feed, fungi, etc., can solve the problems of low yield, high water content of yeast sludge, and difficulty in drying, so as to reduce production costs, protect yeast activity, The effect of reducing energy consumption

Inactive Publication Date: 2005-02-09
THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the yeast slime has a high water content (moisture is about 90%), is viscous, and is difficult to dry, it consumes a lot of energy and has a low yield. One ton of yeast slime can only get more than 100 kilograms of products, so it is difficult to implement large-scale production. Drying at a high temperature above 150°C will result in the loss of yeast activity and reduce the use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 100 kg of yeast slime, add 5 kg of starch and 0.25 kg of yeast medium, stir and ventilate the material to form a slurry, after 10 hours, heat up to 26°C, the number of cells under the microscope is 1 billion / g, and the number of living cells is more than 70% , the activated yeast is directly used as a solid fermentation strain.

[0018] 100 kg of soybean meal as main ingredient, 50 kg of bean dregs and 30 kg of beer dregs as auxiliary materials are used as fermentation raw materials, mixed with activated yeast to make the water content 58%, and the inoculum amount of yeast is 1 billion / g. At the same time, add inorganic nutrient salts, mix and stir evenly, then pile up and ferment. Potassium 0.07%. The thickness of the fermented materials can be stacked up to 20 cm. When the temperature rises above 40°C, turn over the materials and ventilate to cool down. The temperature is controlled at 30°C, and the fermentation time is 36 hours. When the fermented material is ...

Embodiment 2

[0021] Take 100 kg of yeast slime, add 6 kg of starch and 0.3 kg of yeast medium, stir and aerate the material to form a slurry, after 12 hours, heat up to 25°C, the number of cells under the microscope is 1.3 billion / g, and the number of living cells is more than 80% , the activated yeast is directly used as a solid fermentation strain.

[0022] Use 100 kg of soybean meal as the main ingredient, 70 kg of bean dregs, and 100 kg of auxiliary beer dregs as fermentation raw materials, mix with activated yeast to make the water content 60%, and the inoculum amount of yeast is 600 million / g. At the same time, add inorganic nutrient salts, mix and stir evenly, then stack and ferment. The nutrient salts are composed of inorganic salts containing nitrogen, phosphorus, and potassium. The amount of fermentation material is 3% ammonium sulfate, 1% urea, 0.15% calcium hydrogen phosphate, and potassium chloride. 0.05%. The thickness of the fermented materials can be piled up to 25 cm. Whe...

Embodiment 3

[0025] Take 100 kg of yeast slime, add 7 kg of starch and 0.2 kg of yeast medium, stir and ventilate the material to form a slurry, after 11 hours, heat up to 30°C, the number of cells under the microscope is 1.5 billion / g, and the number of living cells is over 72% , the activated yeast is directly used as a solid fermentation strain.

[0026] Use 100 kg of soybean meal as the main ingredient, 20 kg of bean dregs, and 40 kg of wheat bran as auxiliary materials, mix with activated yeast to make the water content 65%, and the inoculum amount of yeast is 800 million / g. At the same time, add inorganic nutrient salts, mix and stir evenly, stack and ferment. The nutrient salts are composed of inorganic salts containing nitrogen, phosphorus, and potassium. The amount of fermentation material is 2.5% ammonium sulfate, 1.5% urea, 0.15% calcium hydrogen phosphate, and potassium chloride. 0.06%. The thickness of the fermented materials stacked can be 28 cm. When the temperature rises a...

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Abstract

A process for preparing yeast powder from used beer yeast includes such steps as activating yeast mud, adding starch and culture medium, heating, solid fermenting, inoculating, adding nutritive salt, fermenting, turning over, cooling, microscopic examination, dissipating heat, and drying. Its product can be used as the additive of feed. Its advantages are simple process and high quality of product.

Description

technical field [0001] The invention relates to a method for manufacturing yeast powder, in particular to a method for manufacturing yeast powder by using beer waste yeast. Background technique [0002] Beer waste yeast is an important by-product in beer production. It is mainly used in the production of feed yeast at present. The process adopts drum drying or pressing-drying. The yeast sludge is directly heated and dried by the heated steam drum, or partially dehydrated by pressing. After drying, the yeast powder produced has the aroma of brewer's yeast, and the crude protein content is about 45% to 50%. Because the yeast slime has a high water content (moisture is about 90%), is viscous, and is difficult to dry, it consumes a lot of energy and has a low yield. One ton of yeast slime can only get more than 100 kilograms of products, so it is difficult to implement large-scale production. Drying at a high temperature above 150°C will lead to the loss of yeast activity and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23K10/18C12N1/16
Inventor 王初升
Owner THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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