Abstract
Mitsui Engineering & Shipbuilding Co., Ltd. has developed the detoxification technique for dioxins-contaminated soils and sediments by indirect-heating oxidation & decomposition method (registered as Diobreaker). We conducted the detoxification experiments of the actual soils and sediments contaminated by dioxins using the rotary-kiln type test facilities with the treatment capacity of 10 to 20kg/h (bench scale) and 70 to 150kg/h (pilot scale). As the test results, we confirmed that the dioxins in the soils and sediments were decomposed more than 99% and the dioxins that vaporized into the vent gas of the rotary-kiln was very small in its balance against the input dioxins.
