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 degrees C. This proves that PP not only affects the elevation of DO level, but also increases the interfacial area and mass transfer coefficient.
School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-1283, USA. huangwc@che.eng.ohio-state.edu
Wei-Cho
WC
Huang
Cheng S
CS
Gong
George T
GT
Tsao
D000332:Aerobiosis; D005285:Fermentation; D005990:Glycerol / Q000378:metabolism; D007700:Kinetics; D010084:Oxidation-Reduction; D010100:Oxygen; D010101:Oxygen Consumption; D011312:Pressure; D012441:Saccharomyces cerevisiae / Q000254:growth & development; D012995:Solubility; D013447:Sulfites
D013447:Sulfites; D005990:Glycerol; D010100:Oxygen