Preparation technology and application of high-protein-content high-nucleic-acid-content yeast hydrolyate
A nucleic acid yeast and preparation process technology, applied in the application, animal feed, animal feed and other directions, can solve the problem of not using feed additives for lactating sows, and achieve the effect of improving the ability of reproduction and improving the level of lactation.
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[0027] The preparation process of high-protein and high-nucleic acid yeast hydrolyzate comprises the following steps:
[0028] (1) Inoculate the yeast into the fermentation medium, and ferment at 28-35°C until the biomass in the fermentation liquid is 50-70g / L;
[0029] (2) After the yeast obtained by fermentation is centrifuged and washed, it is concentrated to obtain a fermentation broth containing 100-150 g / L of yeast dry matter;
[0030] (3) Adjust the pH value of the fermentation broth to 4.5-6.5, and perform ultrasonic treatment for 40-60 minutes under the condition that the ultrasonic power is 400-600W and the temperature is 30-40°C;
[0031] (4) After stopping the ultrasonic treatment, keep the temperature at 45°C to 55°C for 6 to 8 hours, then raise the temperature to 100°C and boil for 10 to 30 minutes to obtain the autolyzed yeast liquid;
[0032] (5) After the temperature of the autolyzed yeast liquid drops to 55°C-60°C, adjust the pH value to 5.5-6.5, add 0.05-0....
Embodiment 1
[0046]Embodiment 1, preparation process 1 of high protein and high nucleic acid yeast hydrolyzate
[0047] The preparation process 1 of high-protein and high-nucleic acid yeast hydrolyzate comprises the following steps:
[0048] 1) Slant-plane strain: inoculate yeast into solid slant medium, culture at 28°C for 20 hours, and obtain slant-plane yeast strain;
[0049] 2) Primary liquid seed culture: Take 2-3 rings of slanted yeast strains into 200mL liquid seed medium, culture at 28°C, 200rpm for 20h, and obtain primary seeds;
[0050] 3) Secondary liquid seed culture: put the first-grade seeds into a fermenter equipped with 10L liquid seed culture medium according to the inoculation amount of 2%, and cultivate them with stirring at 28°C for 20 hours to obtain the second-grade seeds;
[0051] 4) Fermentation tank fermentation: the secondary seed culture liquid was inserted into a fermenter tank equipped with 100L liquid fermentation medium according to the inoculum size of 10%,...
Embodiment 2
[0058] Embodiment 2, preparation process 2 of high protein and high nucleic acid yeast hydrolyzate
[0059] The preparation process 2 of high-protein and high-nucleic acid yeast hydrolyzate comprises the following steps:
[0060] 1) Slant-plane strain: inoculate yeast into solid slant medium, culture at 28°C for 20 hours, and obtain slant-plane yeast strain;
[0061] 2) Primary liquid seed culture: Take 2-3 rings of slanted yeast strains into 200mL liquid seed medium, culture at 28°C, 200rpm for 20h, and obtain primary seeds;
[0062] 3) Secondary liquid seed culture: put the first-grade seeds into a fermenter equipped with 10L liquid seed culture medium according to the inoculation amount of 2%, and cultivate them with stirring at 28°C for 20 hours to obtain the second-grade seeds;
[0063] 4) Fermentation tank fermentation: the secondary seed culture liquid was inserted into a fermenter tank equipped with 100L liquid fermentation medium according to the inoculum size of 10%...
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