抄録
Mercury and dioxins are contained in the sludge of waste water from a wet scrubber in a municipal solid waste incineration plant. The study of the treatment method of the sludge is becoming an important technological subject. In this study, mercury in the sludge is found to be vaporized at around 200℃, at which temperature the vapor pressure of dioxins are very low. This means that mercury vaporizes from the sludge and the dioxins remain in the sludge at that temperature. The dioxins remained in the sludge can be decomposed at a higher temperature by feeding the sludge in a furnace. As the result of this study, a two-stage heating process which can safely treat the sludge containing both mercury and dioxins is proposed.
