The invention belongs to the field of
traditional Chinese medicine processing, and discloses a preparation method of an excrement inoculum substitute in a preparation process of rulvis glycyrrhizae praeparata. The preparation method comprises the following steps of (1) preparing an excrement
inoculation liquid, namely, adding 0.1 M of sterilized and anaerobic treated PBS (
Phosphate Buffer Solution) with the pH value of 7.0 into excrement, carrying out uniform vortex mixing, passing through a filtering membrane, and taking filtrate to obtain the excrement
inoculation liquid; (2) determining the enterotypes of the intestinal
microecology of the excrement
inoculation liquid; (3) inoculation, namely, adding the excrement inoculation liquid into a
fermentation culture medium in a
fermentation tank, performing anaerobic
fermentation, and performing in-vitro culture of enteric microorganisms to obtain fermentation liquid containing the enteric microorganisms; (4) continuously fermenting for 10-12 days, and collecting fermentation liquid when florae in the fermentation tank are stable; and (5) wrapping licorice
powder with a
semipermeable membrane (with the aperture of 2-5 microns), immersing the licorice
powder in the bacterial liquid, fermenting at 37 DEG C for 3-14 days, taking out and
drying. According to the method, the excrement is selected to be subjected to appropriate enlarged culture according to different enterotypes, the excrement inoculum which is consistent and controllable in quality is produced, and a feasible and operable production scheme is provided for standardized production of the pulvis glycyrrhizae praeparatus.