Design and Evaluation of an Air-Stripping Tower for Removing VOCs From Groundwater

An air-stripping tower was designed to treat 1500 gpm (0.09464 m3/s) of groundwater contaminated with trichloroethene, tetrachloroethene, cis1,2-dichloroethene, toluene, ethyl benzene, and isomers of xylene. A simplified procedure for designing a tower with the smallest volume and energy requirements was used. Data for the first four months of operation demonstrated excellent removals for the six volatile organic compounds. The cost of treatment was about $0.0586/1000 gal (3.785 m3) of water treated. Operating problems, microbiological analyses, and data regarding total organic halogen (TOX) and TOX formation potential are summarized.