Because of its nutritional characteristics, bean dregs are good feed for pigs, chickens and ducks. At present, bean dregs are simply fed directly to livestock without treatment, or under simple cooking and heating treatment, there is a saying that "bean dregs will shrink when fed to pigs", mainly because bean dregs contain anti-nutritional factors such as trypsin, saponin and hemagglutinin. Among them, trypsin inhibitor can hinder trypsin in pigs. This is not only a huge economic loss, but also a huge waste of precious resources. Therefore, how to make full use of bean dregs while increasing the yield has become one of the concerns of researchers all over the world.

With the development of microbial engineering technology, microorganisms are more and more widely used in breeding, planting and environment, and the development of feed resources has made a very important contribution to saving feed costs and alleviating resource shortage. Microbial cell protein feed was produced by microbial fermentation of Yifuyuan roughage starter, which can effectively degrade protein in bean dregs, thus greatly increasing the content of amino acid nitrogen in bean dregs. Soybean residue has been improved in removing odor, improving taste, refining granules, purifying nutrition and hindering factors. This is an effective method to utilize bean dregs. Using fermented bean dregs to raise pigs is about 1 month earlier than normal feeding, which saves feed costs and improves the economic benefits of farmers.

Benefits of bean dregs fermentation

Because raw bean dregs are not easy to preserve, they are prone to mildew and deterioration; Pigs are prone to diarrhea because they contain a variety of anti-nutritional factors, which affect the growth and health of pigs. Therefore, after fermentation, they have the following advantages: they are convenient for long-term storage. Non-fermented bean dregs can be stored for up to 3 days, and fermented bean dregs can generally be stored for more than one month. If it can be sealed, compacted or dried, it can be preserved for more than half a year or even one year. (2) The palatability of the feed is reduced by more than one third of the crude fiber, and animals like to eat more, which promotes appetite and increases the secretion of digestive juice.