Pilot Scale Evaluation on Photooxidation Treatment of Trichloroethylene in Gas Phase

A pilot scale UV photooxidation system which involves a complete mixing flow type UV reactor connected in series with a multiple stage type UV reactor and a gas absorption tower filled with crashed marble has been fabricated to investigate a treatment for the trichloroethylene (TCE) gas extracted from contaminated soil. The photooxidation reaction rate in the complete mixing flow type reactor was increased with increasing the photo intensity in the reactor and was correlated with the laboratory scale experimental result. At the outlet of the multiple stage type reactor the TCE was decomposed less than 1 ppm, when the TCE concentrations at the inlet of the complete mixing flow type reactor were more than 100 ppm. The photooxidation products which exhibited acidity were found to be more effectively eliminated by the pilot scale absorption tower than by the laboratory scale tower.