Dynamic Surface Tension Effects on Oxygen Transfer
Publication: Journal of Environmental Engineering
Volume 117, Issue 1
Abstract
Recent advances in estimating mass transfer coefficients are largely restricted to clean water conditions, and engineers must still rely upon empirical methods such as α factors to correct results for process conditions. This research focuses on quantifying the volumetric mass transfer coefficient, and the liquid film coefficient, using the dynamic surface tension (DST) measurement. Two anionic surfactants are used in two concentrations to observe their effects on diffused air and to characterize the DST relationship. A mathematical model is formulated showing the DST relationship with bubble life, as a function of two parameters, slope and intercept of the DST function. DST value is calculated from the model using the estimated parameters and the bubble retention time. is predicted by DST, aeration flow rate, and the static surface tension measurement. The final result shows the DST parameter can estimate values given the air flow rate and surfactant concentration.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 117 • Issue 1 • January 1991
Pages: 126 - 142
Copyright
Copyright © 1991 ASCE.
History
Published online: Jan 1, 1991
Published in print: Jan 1991
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