ISSN:
1573-9031
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Conclusions 1. An analysis of the experimental data on the time of fermentation has shown that the main influence on the intensity of gas exchange is exerted by the growth phase in the intensities of aeration and stirring, the degree of their influence being different for different times of fermentation. 2. Curves of the change in the intensity of respiration in the process of total fermentation have shown that two regions of increased respiration exist (between 40 and 80 and between 130 and 160 hours). 3. It has been shown that when more than 10% of oxygen is dissolved in the culture liquid, its level has no effect on the intensity of respiration. 4. It has been shown that the limit to the influence of stirring on respiration is found (within the limits of the viscosity studied) at a time of complete mixing of the order of 2 min, with the exception of the first few hours of growth (up to 24 hours) when it is considerably greater. 5. It has been found that the limit to the intensity of aeration and to the degree of its action on respiration varies over fairly wide limits during the fermentation process -from 0.5 to 1.5 liter/liter · min. 6. To maintain conditions of respiration predetermined as a function of the state of growth, the aeration and stirring must be varied according to a program during the fermentation process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00759778
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