The invention relates to the field of producing highly efficient and low-cost microbiological feed proteins based on the three-stage
fermentation of vinegar residue and miscellaneous
meal by using probiotics. The vinegar residue used as a main
carbon source and the
cottonseed meal used as a main
nitrogen source as well as a partial
carbon source are subjected to the first-stage
fermentation pretreatment by using food-grade mould, the product is subjected to the second-stage
fermentation by using bacillus and
yeast as zymocytes and adding partial cottonseeds, and finally the product is added with partial
soybean meal and
rapeseed meal used as a
nitrogen source as well as a partial
carbon source, inoculated with
lactobacillus and acid-resisting
bifidobacterium and uniformly mixed, and then the product is subpackaged in one-way membrane bio-bags for sealed storage, namely the finished products are obtained by the three-stage fermentation. The microbiological feed proteins are extremely low in production cost and can be used as a feed component, and the adding amount reaches 5 to 40 percent. Because the finished products do not need
drying treatment, the finished products have more viable
bacteria as well as enzymes, few other
bacteria and an obvious feeding effect; moreover, the microbiological feed proteins also have the advantages of greatly improving the
utilization rate of
livestock and poultry feed, increasing yield, improving intestinal environment, improving
immunity and resistance, replacing
antibiotics and improving quality of animal products.