Effects of Pressure Pulsation on Oxygen Transfer Rate Measured by Sulfite Method
Pressure pulsation (PP) was investigated for its effects on oxygen transfer rate (OTR) measured by sulfite oxidation. By manipulating airflow rate, 0.41–1.2 vvm, and a control valve in a 4-L bioreactor, the frequency of PP was varied at different gas pressures3–15 psig. A mathematical model of OTR was built and compared to experimental data. OTR was also examined at constant gas pressure, 4.5–15.0 psig. The results indicate a good agreement between measurement and model prediction. OTR above 9 psig during PP showed significant enhancement at 25°C. This proves that PP not only affects the elevation of DO level, but also increases the interfacial area and mass transfer coefficient.
Index EntriesOxygen transfer pressure pulsation sulfite oxidation
Unable to display preview. Download preview PDF.
- 10.Shuler, M. L. and Kargi, F. (1992), Bioprocess Engineering, Prentice Hall, Englewood Cliffs, NJ, p. 165.Google Scholar