Effects of pressure pulsation on oxygen transfer rate measured by sulfite method |
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Authors: | Wei-Cho Huang Cheng S. Gong George T. Tsao |
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Affiliation: | (1) School of Chemical Engineering, Purdue University, 47907-1283 West Lafayette, IN |
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Abstract: | 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. |
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Keywords: | Oxygen transfer pressure pulsation sulfite oxidation |
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