Development and multi-stage strengthening method for Shanxi mature vinegar composite bacterial agent based on bacteria strain interaction
A technology of compound bacterial agent and mature vinegar, applied in the field of microorganisms, can solve the problems of simple strengthening methods and lack of research on bacterial species interaction
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Embodiment 1
[0027] Example 1: Isolation and identification of bacteria and screening of excellent strains
[0028] (1) Isolation of bacteria: Gradiently dilute the samples of wine mash and vinegar unstrained spirits in the brewing process of Shanxi mature vinegar, and spread them on MRS medium, acetic acid bacteria basal medium, and Bengal red medium, and place them in the Cultivate for 48 hours in a constant temperature incubator at 30°C and 37°C. Select an appropriate dilution (30‒300) to pick a single colony of a typical strain, and purify it in three sections on the medium, observe the surface morphology and microscopic shape of a single colony, if the shape of a single colony is consistent, then This colony is considered to be a pure species and transferred to a slant for preservation. A total of more than 3,000 strains were isolated from the brewing process of Shanxi mature vinegar, and a strain resource bank was established.
[0029] (2) Identification of strains: More than 600 s...
Embodiment 2
[0042] Example 2: The interaction between Saccharomyces cerevisiae CGMCC 15729, Candida wormwood CGMCC16913, Bacillus mohaiwei CGMCC 16910, Lactobacillus plantarum CGMCC 15731, and Acetobacter pasteurianus CGMCC 15730, which are excellent indigenous Shanxi mature vinegar
[0043] (1) Interaction between Saccharomyces cerevisiae CGMCC 15729, Candida wormwood CGMCC 16913, Bacillus mohaiwei CGMCC 16910, and Lactobacillus plantarum CGMCC 15731: The cultured Saccharomyces cerevisiae CGMCC 15729, Candida wormwood CGMCC 16913 was inserted into the sorghum juice medium with the cultured Bacillus mohaiwei CGMCC 16910 and Lactobacillus plantarum CGMCC 15731 at a ratio of 1:1:1 (1:1:1:1), and cultured at 30°C for 6 days The biomass of the strains was measured to check whether there was any inhibitory effect between them. The experimental results showed that there was no significant inhibitory effect on biomass between S. figure 1 ), increased the content of organic acids during the inter...
Embodiment 3
[0050] Embodiment 3: preparation of compound direct throw type starter
[0051] (1) Composite direct-injection starter in the alcohol fermentation stage: Inoculate Saccharomyces cerevisiae CGMCC 15729 and Candida wormwood CGMCC16913 into PDA liquid medium according to the inoculum amount of 3%, and culture them statically at 30°C for 24 hours; Bacillus mohaiwei CGMCC 16910 and Lactobacillus plantarum CGMCC 15731 were inoculated into MRS liquid medium according to the inoculum amount of 3%. Static culture for 24 hours, the bacterial concentration of the culture solution reaches 10 8 After cfu / mL, the hollow fiber membrane is used to concentrate, the fermentation broth is concentrated to 1 / 5 of the original volume, and then mixed with a sterile protective agent. The volume ratio of the concentrated fermentation broth to the protective agent is 1:3 v:v. After the fermentation broth is treated by spray drying, the dry powder of Saccharomyces cerevisiae CGMCC 15729, Candida wormwo...
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