Method for preparing feed yeast

Abstract

The invention discloses a method for preparing feed yeast. The method comprises the following steps of: using waste solution obtained after phytin is extracted from water in which corn is soaked as a yeast culture substrate, using liquid ammonia and albumens as nitrogen sources, using mother solution of glucose, liquid glucose or other molasses as carbon sources, mixing the raw materials in a ratio, adding trace elements to the mixture to form a culture medium, adjusting the pH value and temperature of the culture medium, adding bacteria in a self priming fermentor, performing expansion culture for several times till the requirement for mass production is met, and finally obtaining the finished products of the feed yeast by evaporating concentration and centrifugal atomization drying. Themethod solves the bottleneck that the phytin waste solution and mother solution, which are generated during the production of inositol, cannot be effectively treated, so that the development is restricted and enforces the development of the inositol industry; and the method also has the advantages of maximizing the resource utilization, changing the wastes into the valuables, protecting the environment and increasing the added value of the products.

Description

technical field [0001] The invention belongs to the technical field of microbial fermentation, and in particular relates to a method for producing feed yeast with waste liquid after extracting phytin from corn soaking water. Background technique [0002] Feed yeast is rich in protein, complete in amino acids, reasonable in composition, and rich in B vitamins, mineral elements, trace elements, enzymes, carbohydrates, physiologically active substances and growth-promoting factors. It is a high nutritional value and can replace fishmeal High-quality protein, which has multiple functions of nutrition, food attraction and value-added probiotics, promotes the metabolism of livestock and poultry, enhances the disease resistance of livestock and poultry, and improves the growth rate, reproductive ability, meat quality and fur quality of livestock and poultry. Widely used in livestock and poultry breeding industry, it is the best substitute for fishmeal, can reduce the cost of breedi...

AI Technical Summary

Problems solved by technology

[0005] The current problems are: 1. Using the hydrolyzed filtrate of corn husk as carbon source, the filtrate hydrolyzed by high temperature and adding acid also needs chromatographic separation and separation treatment. The process is cumbersome and complicated, and the filter residue produced needs to be treated.

In addition, the viscosity of the hydrolyzed sugar solution is very low, requiring a large number of fermentation tanks, resulting in low equipment utilization and high production costs

2. Directly use corn soaking water as raw material. Due to the high impurities and high ash content of corn soaking water, the fermentation liquid has a lot of precipitation, a long cycle, and the number of bacteria is not full, which seriously affects the fermentation culture, and in the process of spray drying, atomization The effect is poor, the product is easy to agglomerate into lumps, the color is dark, and the ash content is above 25%, which is a substandard product and is not suitable for animal feeding

3. Using sodium hydroxide to adjust the ph value of the medium will not achieve the effect of this process, and will also increase the ash content of the product

5. Use feeding acid to control the pH value. The content of SO42- or cl- in the product is high, which is toxic and harmful to animals; and if the pH value is lower than 4, the fermentation cycle will be significantly prolonged, which is not conducive to fermentation and cultivation

6. The waste liquid after extracting phytin with corn soaking water and the mother liquor produced by high-temperature hydrolysis of phytin to produce inositol have not yet been resolved