The invention discloses a method for producing fee through biological
fermentation of distiller's grains. The method comprises the following producing processes: 1. preparing and mixing materials, namely, dissolving an
enzyme preparation and
inorganic nitrogen which are externally added in water, and directly mixing uniformly with distiller's grains; 2. inoculating, wherein strain is mainly derived from animal
probiotic microorganisms, and includes, but not limited in, brewer's
yeast, candida utilis, endomycopsis fibuligera,
bacillus subtilis,
bacillus licheniformis,
trichoderma koningii,
geotrichum candidum and the like; 3. large-scale
fermentation, namely, implementing single-bacterium or multi-
bacteria mixed
fermentation through a fermentation box; 4.
drying; 5. rice
husk separation, namely, beating dried product for several times, oscillating and filtering through a 40-60-mesh
sieve to remove most rice husks; and 6.
grinding and packaging. The feed disclosed by the invention is rich in
mycoprotein, vitamins and bioactive substances, crude
protein content is no less than 25%, and
amino acid composition is rich and complete; furthermore, the product is abundant in probiotics and free from foreign sell of fresh distiller's grains, and is relatively high in feeding value. The method disclosed by the invention is short in fermentation cycle, high in
automation degree and production efficiency and low in production cost, and provides a good industrial way for comprehensive treatment of distiller's grains on a large scale.