도시소각회의 재활용 기술로서 내부발열소결법의 적용성 = Applicability of inner exothermic sintering mehtod as a technique for recycling of MSWI Ash

다국어 초록 (Multilingual Abstract)

This paper describes the use of municipal solid waste incinerator (MSWI) ashes to manufacture synthetic aggregates using an innovative sintering technique, which was named "inner exothermic sintering (IES) method", characterized by co-treatment of sewage sludge as an inner heating source. The results of sintering experiments indicate that the added sewage sludge has powerfully acted as an inner heating source and a bloating agent in the sintering process of pellet, and thus could be manufacture of a double layered MSWI ash aggregate with fusion-bloated inner part and nonfusion dense outer surface. Futhermore, in this process, the fly ash also be co-treated without any particular change of the sintering condition. The synthetic aggregates are tested according to US regulation and fulfill regulatory limits, therefore, confirming their safe applications, although the results show some higher leaching from sintered aggregates than from melted slags. An overall conclusion from this is that the IES method represents an environment friendly and a solution for stabilising and converting MSWI ashes and sewage sludges into useful products.