Abstract
Tests were carried out on a heater-type, oxidation-decomposition system to study whether this system could achieve complete decomposition of volatile chlorinated organic compounds (TCE, PCE), major contaminants of groundwater and soil. Test results revealed a decomposition characteristic that there is less residual TCE/PCE (higher decomposition percentage) with greater inflow load, longer retention time, and higher temperature of the reactor used. This system was capable of about 100% decomposition of TCE into CO2 and HCI, when the temperature of the reactor was 950°C, the retention time was over 8.0 seconds, and the TCE concentration was over 3%. Under these conditions, it was possible to carry out stable continuous treatment. CCl4, PCE, CHCl3 were detected below the limited value as by-products and there was no forming of Dioxins under these conditions. Tests which involved the treatment of a gas which contained both TCE and PCE revealed a TCE decomposition of approximately 100%, and a PCE decomposition of below the limited value, when the reactor temperature was 950°C, the retention time was over 8.0 seconds, and the TCE and PCE concentrations were over 3% and 0.3%, respectively. This system has the efficiency of more than two times that of a UV system.
