Application of sieve-tray air strippers to the treatment of surfactant-containing wastewaters

Authors

  • Tohren C. G. Kibbey,

    Corresponding author
    1. School of Civil Engineering and Environmental Science, University of Oklahoma, Norman, OK 73019
    • School of Civil Engineering and Environmental Science, University of Oklahoma, Norman, OK 73019
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  • Kurt D. Pennell,

    1. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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  • Kim F. Hayes

    1. Dept. of Civil and Environmental Engineering, The University of Michigan, Ann Arbor, MI 40809
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Abstract

Using sieve-tray air stripping as a means of removing contaminants from surfactant solutions was studied to determine if tray air stripping can be applied successfully to treating surfactant-containing wastewaters and, if so, to develop a quantitative approach for designing tray air-stripping systems for treating surfactant-containing wastewaters. High-concentration surfactant solutions were prepared and contaminated with five different volatile organic compounds. Removal of the organic compounds was evaluated using a commercial sieve-tray air stripper. Overall, the air stripper was able to efficiently remove the contaminants from solution, and correction of Henry's Law constants for micellar solubilization-induced volatility reduction allowed tray air-stripper design equations to quantitatively predict air-stripper removal for all contaminants. Foaming within the air stripper could be controlled with low concentrations of a silicone-polymer antifoaming agent. Although adding antifoaming agents may be undesirable for some applications, other applications can benefit from the operational and performance advantages of sieve-tray air strippers. Issues related to air-stripper design for low-volatility compounds are also discussed.

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