ISSN:
0006-3592
Keywords:
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The primary consideration in fermentor design is the supply of oxygen to the growing microorganisms. The oxygen-transfer characteristics of a two-stage splitcylinder airlift tower were compared to those of a similar single-stage airlift tower of equal liquid volume using a sodium sulfite-air system. At superficial gas velocities, from 720 to 1200 cm/min, no difference in KLa was apparent. The KLa was significantly larger in the two-stage tower for a gas velocity between 1200 and 2728 cm/min. At 2728 cm/min a KLa of 25.2 min-1 was achieved in the two-stage system, and at 2262 cm/min the two-stage tower had a 54% larger KLa than the single stage. A comparison of dispersion-volume based KLa showed a 27% larger value at a gas velocity of 2262 cm/min. The performance ratios for the two-stage tower were larger than those for the single-stage tower at oxygen-transfer rates greater than 180 mmol/liter hr. A comparison of the data with literature values is presented.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bit.260210107
