ISSN:
0006-3592
Keywords:
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Aeration and agitation conditions in 250 l. baffled fermenters with different impeller diameters, speeds, and air flows were studied during fermentations for the production of rifamycin, a new antibiotic produced by Streptomyces mediterranei. Dissolved oxygen concentration was continuously measured and the courses of power input, oxygen diffusion rate QO2, dry weight, viscosity, pH, sugar utilization, and antibiotic titer determined. Higher antibiotic yields occurred when the oxygen demand of the culture was satisfied and an excess of dissolved oxygen was still present during a critical period of the fermentation between the 50th and the 80th hr. To meet this requirement a power input of about 3.0 w./l. and an air flow ranging from 0.8 to 1.5 l./l./min. were found to be necessary.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bit.260060303
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