Process for producing fermented soybean meal through solid state fermentation of mixed culture

Abstract

The invention provides a process for producing fermented soybean meal through the solid state fermentation of mixed culture. A homemade breeding culture medium can be used for simultaneously breeding and culturing four kinds of cultures and then obtained culture solutions are used for fermenting the soybean meal; few breeding and fermentation procedures are adopted, the process is easy in operation and easy to achieve large-scale production; the fermented soybean meal is low in water content, loose, non-viscous and short in drying time, so that the production cost is lowered; in addition, the drying is performed at a relatively-low temperature, so that the biological activity of probiotics in the soybean meal is maintained. The process disclosed by the invention is used for fermentation production of the soybean meal by using mixed cultures of candida utilis, bacillus subtilis, lactobacillus and bifidobacterium; the fermented soybean meal contains a great number of probiotic groups, and a trypsin inhibitor is removed effectively; as an animal feed, the fermented soybean meal can be used for improving the immunity of animals and reducing the occurrence of diseases. Used as the animal feed, the fermented soybean meal produced by adopting the process disclosed by the invention is relatively easy to digest and absorb and can be used for replacing fish meal to be applied to aquaculture feeds and pig and chicken feeds.

Description

technical field [0001] The invention relates to the technical field of biological fermentation, in particular to a process for producing fermented soybean meal by solid-state fermentation of mixed strains. Background technique [0002] Soybean meal is a by-product obtained after soybean oil is extracted from soybean. It is the one with the largest output and the most widely used among 12 kinds of animal and vegetable oil meal feed products such as cottonseed meal, peanut meal and rapeseed meal. Main ingredient for livestock and poultry feed, widely used in poultry and aquaculture. Bio-fermentation of soybean meal can remove anti-nutritional factors in soybean meal, and the fermented soybean meal contains a large number of probiotic components, which has high biological activity, can improve the microbial balance of animal intestines, and supplement a large number of active probiotics in the intestines It can inhibit the growth of harmful bacteria such as Escherichia coli an...

AI Technical Summary

Problems solved by technology

Drying of fermented soybean meal is a common problem. High-temperature drying will cause serious loss of heat-sensitive substances such as volatile sour substances in fermented soybean meal, reducing the nutrition of the product; low-temperature drying will increase the cost of fermentation, which is not conducive to large-scale production

[0003] Patent CN103315143A discloses a preparation method of low-temperature drying fermented soybean meal. Mixed strains ferment wet soybean meal and molasses, and then use low-temperature drying to treat the fermented soybean meal. Since the fermented soybean meal has a large moisture content, low-temperature drying will greatly increase the fermentation cost; Patent CN102948614A discloses a method for producing active feed peptides by synergistically fermenting soybean meal with bacteria and enzymes. Compound enzymes and compound strains are used to carry out temperature-controlled fermentation of soybean meal containing moisture in stages. The fermentation does not involve the cultivation of strains, and adopts separate Stage temperature controlled fermentation, increasing the fermentation process