The present application relates to the technical field of
feed processing, and particularly relates to a preparation method of Maotai-
flavor distiller's grains fermented feed, which comprises the following steps:
drying treatment based on the
moisture content of Maotai-
flavor distiller's grains to obtain basic distiller's grains; determining the strain ratio of brewer's
yeast,
bacillus subtilis and
aspergillus niger based on the
tannin content of the basic distiller's grains to obtain a compound
fermentation inoculant; inoculating and then fermenting; determining state evaluation parameters based on the total
polyphenol accumulation rate, the dissolved
oxygen consumption rate and the microbial
activity index during the
fermentation process, and performing qualified evaluation, and dynamically adjusting when unqualified; determining the
fermentation end point based on the
tannin degradation rate and the total
polyphenol accumulation rate; and mixing the fermented distiller's grains with the basic feed at a
mass ratio of 1% after low-temperature
drying of the fermented distiller's grains. The present application realizes three-layer control of
raw material evaluation,
process control and
end point determination, significantly improves the stability and content of functional active ingredients in the product, reduces the
tannin and
safety risk, and has a good intestinal
health improvement effect on animals.