Cycle technologies and strategies on MSW incineration residue
- Kyoto Univ. (Japan). Environment Preservation Center
- Takuma Co., Ltd., Osaka (Japan)
- Kubota Corp., Osaka (Japan)
Fly ash resulting from an incineration of municipal solid waste (MSW) has been classified as a waste under special control in Japan. According to the Japan`s Waste Management Law, MWI fly ash cannot be allowed to be disposed of, unless it is treated by one of the four methods specified by the Ministry of Health and Welfare; they are (1) melting, (2) solidification by cement, (3) stabilization by chemical agent, (4) acid extraction. For long-term ideal measures against waste incineration residues, research and development priorities should be given to resource recycling, followed by stabilization and storage management. In resource recycling, metals such as lead, zinc and cadmium are concentrated by acid or water extraction, or by high temperature volatilization separation and then returned to resource recycling. Fly ash and/or bottom ash from MWI is treated by the melting process, where PCDDs/DFs in the fly ash are decomposed at temperatures of more than 1,300 C in the furnace and heavy metals are concentrated in the fly ash of melting process. In the second step, heavy metals in the fly ash of melting process are separated by chlorinating volatilization or water extraction. The test results of the melting technologies in the commercial plant are described and the applicability of this cycle concepts is discussed.
- OSTI ID:
- 495367
- Report Number(s):
- CONF-9504119--
- Country of Publication:
- United States
- Language:
- English
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