The invention belongs to the technical field of animal feeds and bioengineering, specifically relates to a method for producing
probiotic peptides by using the two-step
solid-state
fermentation of
peanut meal. The method comprises the following steps: using the
peanut meal as a
raw material, killing
bacteria after uniformly mixing and churning the
peanut meal and water, adding 2%(v / w)
aspergillus niger(CGMCC9183)
spore liquid to the water solution of the peanut
meal and the water according to the weight of the peanut
meal after killing the
bacteria, culturing the mixture of the
spore liquid and the water solution for 24-28 hours at the temperature of 28-32 DEG C, and turning over and mixing the materials once
every four hours; and adding 10%(v / w)
pediococcus pentosaceus(CGMCC9182) to the mixture of the
spore liquid and the water solution according to the weight of the peanut
meal after culturing the mixture of the spores liquid and the water solution, uniformly mixing the mixture of the peanut meal, the water, the spore liquid and the
pediococcus pentosaceus, anaerobically fermenting the mixture of the peanut meal, the water, the spore liquid and the
pediococcus pentosaceus for 36-42 hours at the temperature of 37-46 DEG C,
drying and crushing the mixture of the peanut meal, the water, the spore liquid and the pediococcus pentosaceusat the temperature of 60 DEG C after fermenting, and obtaining the
probiotic peptides. The polypeptides content of the
probiotic peptides achieves more than 25%, the
lactic acid content achieves more than 8.0%, the viable
bacteria count of lactobacilli is more than 109CFU / g, and acidic proteinases achieve more than 200U / g. The method disclosed by the invention has the advantages that the cost of production is low and the fermenting process is easy to control, so that the quality of products is stable.