Method for fermenting sweet potato residues by utilizing probiotics and application of sweet potato residues
A technology of sweet potato dregs and probiotics, which is applied in the field of microbial fermentation, can solve the problems of low protein content in fermented sweet potato dregs, achieve the effects of prolonging storage time, simple method, and easy-to-obtain raw materials
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Embodiment 1
[0048] A method utilizing probiotics to ferment sweet potato dregs, comprising the following steps:
[0049] (1) Preparation of fermentation bottom material
[0050] Clean the sweet potatoes, put them into a juicer and add water to crush them, then filter them with three layers of gauze, put the filter residue into a white porcelain plate, put them in an oven at 60°C, bake for 2 hours, and stir every 20 minutes during the baking period. Prepare the sweet potato residue and put it in a 4°C refrigerator for later use;
[0051] (2) Recovery of probiotics and preparation of seed solution
[0052] YPD liquid medium includes peptone, yeast extract, glucose and chloramphenicol, the concentration of peptone in YPD liquid medium is 20g / L, the concentration of yeast extract is 10g / L, the concentration of glucose is 20g / L, the concentration of chloramphenicol Concentration is 0.02g / L, and the pH value of final YPD liquid culture is 7.2;
[0053] YPD solid medium is prepared by adding 20...
Embodiment 2
[0062] The method of embodiment 2-5 utilizing probiotics to ferment sweet potato dregs is the same as in Example 1, the difference being that: the volume-to-mass ratio of the mixed solution and sweet potato dregs in Example 2 is 1:100mL / g; the mixed solution in Example 3 The volume mass ratio with sweet potato residue is 3:100mL / g; The volume mass ratio of mixed solution and sweet potato residue is 5:100mL / g among the embodiment 4; The volume mass ratio of mixed solution and sweet potato residue is 9 among the embodiment 5: 100mL / g.
Embodiment 6
[0063] Embodiment 6: (used culture medium is the same as embodiment 1)
[0064] A method utilizing probiotics to ferment sweet potato dregs, comprising the following steps:
[0065] (1) Preparation of fermentation bottom material
[0066] Clean the sweet potatoes, put them into a juicer and add water to crush them, then filter them with three layers of gauze, put the filter residue into a white porcelain plate, put them in an oven at 55°C, bake for 2.5 hours, and stir every 15 minutes during the baking period , the obtained sweet potato residue was placed in a refrigerator at 4°C for subsequent use;
[0067] (2) Recovery of probiotics and preparation of seed solution
[0068] Use a sterile loop to pick Candida utilis, Saccharomyces cerevisiae, Lactobacillus plantarum and Enterococcus faecalis and inoculate them on the corresponding medium (Candida utilis and Saccharomyces cerevisiae are inoculated with YPD solid medium, Lactobacillus plantarum is inoculated with MRS solid m...
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