Method for preparing sodium gluconate through adopting semicontinuous fermentation technology
A technology of sodium gluconate and fermentation process, which is applied in the field of preparing sodium gluconate by semi-continuous fermentation process, which can solve the problems of no catalytic activity, low utilization rate of equipment, prolonged reaction time, etc., and achieve the reduction of steam sterilization times and continuous production Strong durability and stable product quality
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Embodiment 1
[0021] (1) Put the fermentation medium into the fermenter, insert the Aspergillus niger spore liquid (China Industrial Microorganism Strain Management and Preservation Center, CICC40417), and incubate:
[0022] The cultivation time is 15 hours, the tank pressure is controlled at 0.22MPa, the temperature is controlled at 35°C, the pH value is controlled at 6.8 within 0-12h, and 6.4 after 12h, and the ventilation ratio is controlled at 1.6 within 0-4h, 4-8h Control it within 1.8, and control it at 2.2 after 8 hours;
[0023] (2) Release 50% of the culture solution and supplement the same volume of fresh medium for cultivation:
[0024] The cultivation time is 6 hours, the tank pressure is controlled at 0.14MPa, the temperature is controlled at 33°C, the pH value is controlled at 6.5 within 0-4h, 6.0 after 4h, and the ventilation ratio is controlled at 1.0;
[0025] (3) step (2) is carried out in a cycle, and a total cycle is carried out 6 times;
[0026] (4) put the tank.
[...
Embodiment 2
[0030] (1) Put the fermentation medium into the fermenter, insert the Aspergillus niger spore liquid (China Industrial Microorganism Strain Management and Preservation Center, CICC40424), and incubate:
[0031] The cultivation time is 18 hours, the tank pressure is controlled at 0.18MPa, the temperature is controlled at 32°C, the pH value is controlled at 6.5 within 0-12h, and 6.0 after 12h, and the ventilation ratio is controlled at 1.5 within 0-4h, 4-8h Control it within 1.6, and control it at 1.8 after 8 hours;
[0032] (2) Release 20% of the culture solution and supplement the same volume of fresh medium for cultivation:
[0033] The cultivation time is 4.5 hours, the tank pressure is controlled at 0.16MPa, the temperature is controlled at 38°C, the pH value is controlled at 6.7 within 0-4h, 6.4 after 4h, and the ventilation ratio is controlled at 1.2;
[0034] (5) step (2) is carried out in a cycle, and a total cycle is carried out 9 times;
[0035] (6) put the tank.
...
Embodiment 3
[0039] (1) Put the fermentation medium into the fermenter, insert the Aspergillus niger spore liquid (China Industrial Microorganism Strain Management and Preservation Center, CICC40405), and incubate:
[0040] The cultivation time is 16 hours, the tank pressure is controlled at 0.20MPa, the temperature is controlled at 34°C, the pH value is controlled at 6.7 within 0-12h, and 6.2 after 12h, and the ventilation ratio is controlled at 1.5 within 0-4h, 4-8h Control it within 1.7, and control it at 2.0 after 8 hours;
[0041] (2) Release 30% of the culture solution and supplement the same volume of fresh medium for cultivation:
[0042] The cultivation time is 5.5 hours, the tank pressure is controlled at 0.15MPa, the temperature is controlled at 35°C, the pH value is controlled at 6.6 within 0-4h, 6.2 after 4h, and the ventilation ratio is controlled at 1.1;
[0043] (7) step (2) is carried out in a cycle, and a total cycle is carried out 7 times;
[0044] (8) put the tank.
...
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