음식물 쓰레기나 일반 쓰레기를 소각로로 소각했을 때 발생하는 소각재에는 환경오염의 원인이 되는 다이옥신류 등의 유해 물질이나 중금속류가 포함되어 있다. 이들을 무해화 처리하는 방법 및 그 장치를 제공하는 것. 탈수 건조, 분쇄 처리를 실시한 소각재를 외기와 절연된 저산소 농도 상태의 공간에서 유해 물질은 환원 처리해 무해화하고 중금속류는 안정적인 화합물로 변환해 무해화한다.
To provide an incineration ash detoxification treatment process which enables inhibition of environmental pollution due to pollutants derived from or contained in municipal solid waste and/or general incineration ash, such as heavy metals and dioxins while subjecting generated off-gas to detoxification treatment and also to provide an equipment for the process. This detoxification treatment process comprises: subjecting incineration ash to dehydration/drying and grinding treatment; and detoxifying the treated incineration ash in a space which is isolated from the outside air and maintained in such a state that the oxygen concentration in the space is low, by subjecting toxic substances in the incineration ash to reduction treatment to detoxify the toxic substances and converting heavy metals in the incineration ash into stable compounds.