P9

LABORATORY EVALUATION OF OXYGEN TRANSFER RATES FOR AIR SPARGING AND IN-WELL AERATION IN CLEAN WATER AND SATURATED SOIL

In concurrence with a field study which is evaluating the two injection methods, laboratory reactors have been set up to study oxygen transfer rates under controlled laboratory conditions. Clean water and saturated soil oxygen transfer rates and transfer efficiencies are examined. The ASCE standard method for measurement of oxygen transfer in clean water is conducted using a Campbell Scientific 21 X datalogger and six Phoenix DO probes to obtain representative data from throughout the tank volume. These oxygen transfer rates in clean water and soils will be presented and contrasted and comparisons to field scale applications will be made in this poster presentation.

Key words: air sparging, in-well aeration, oxygen transfer