Yeast culture extruding granulation and fermentation process taking distiller grains as raw materials

Abstract

The invention relates to a yeast culture extruding granulation and fermentation process taking distiller grains as raw materials. A technological process of the yeast culture extruding granulation and fermentation process comprises the following steps: (1) preparing materials; (2) activating strains; (3) inoculating and mixing; (4) controlling the temperature and fermenting; (5) carrying out enzymolysis to break walls; (6) granulating: preparing yeast culture particles by adopting a screw rod extruding manner; (7) drying: controlling the temperature of the yeast culture particles at 45-75 DEG C and drying for 12-36 hours to obtain finished products; and (8) carrying out post-treatment on the products: checking the products and packaging after qualification to obtain finished products. According to the yeast culture extruding granulation and fermentation process provided by the invention, distiller grain rice husks do not need to be removed; the products are obtained by adopting extruding granulation and low-temperature drying methods; after the materials are fermented for the first time, the viable count of yeast is more than or equal to 10*10<8>cfu / g of dry materials, the content of small peptides in a yeast culture is more than or equal to 10% and the wall breaking rate of the yeast is more than or equal to 80%; and the yeast culture extruding granulation and fermentation process has a complete process, a short production period and a relatively high nutritional value.

Description

technical field [0001] The invention relates to a process for preparing yeast culture granules from distiller's grains without shelling, and belongs to the technical field of bioengineering. Background technique [0002] Yeast culture refers to micro-ecological products formed by yeast on a specific medium after sufficient fermentation under the control of specific process conditions. The composition of its products is complex, containing minerals, B vitamins, flavor-enhancing substances, digestive enzymes, mannan oligosaccharides, β-glucans, amino acids, and "unknown growth-promoting factors", etc. These substances are harmful to microorganisms in the gastrointestinal tract of animals. It is an excellent nutrient substrate, which can promote the growth of microorganisms, thereby improving the production performance of animals. It is a micro-ecological feed additive that integrates multiple functions such as health care and nutrition. [0003] The annual output of liquor i...

AI Technical Summary

Problems solved by technology

[0005] ① Most of the distiller’s grains need to be dehulled before they can be processed again. The process is cumbersome and causes waste to accumulate, which greatly increases the production cycle and processing costs; Shell, but the fermentation temperature limits the activity of the enzyme preparation and cannot perform a good degradation effect;

[0006] ② Most of the prepared yeast cultures are crushed and then packaged, resulting in uneven distribution of nutrients absorbed by animals during feeding and poor taste;

[0007] ③ After the finished product is obtained, it is often necessary to remove excess water by drying, but the unsuitable drying temperature has caused the loss of nutrients such as vitamins, enzymes and growth factors in the material, and the loss of feeding value

[0008] ④ The process condition parameters of the traditional process are not superior enough, the process is not complete, the product composition is not clear, and the nutrition of the prepared yeast culture and the stability of the batch product cannot be guaranteed