Nobutoshi Tanaka* and Masataka Hanashima**

* Division of Environment and Resource Eng., Graduate School of Eng., Hokkaido University
** Department of Civil Eng., Faculty of Eng., Fukuoka University

+ Correspondence should be addressed to Nobutoshi Tanaka:
(Kita-13, Nishi-8, Kita-ku, Sapporo, 060 Japan)

Abstract

The problem of high salt concentration in landfill leachate and the numerous resultant difficulties in leachate treatment process in municipal solid waste landfills sites is the result of the current solid waste treatment strategies in Japan, in which almost all waste is disposed of after incineration. Technical matters related to this problem have been almost resolved. However, the increasing mineralization of disposed wastes is increasing pressure for the revision of technology for conventional sanitary landfill sites, in which typically biodegradable organic waste is conserved and treated into a stabilized state. Are mineralized wastes such as bottom and fly ash from incineration facilities and imcombustible processing residue from resource recovery facilities appropriate for municipal sanitary landfills. We must decide carefully which these of two alternatives is better: the completion of landfill reactor technology with long-term storage and the perfect stabilization of wastes including high concentration metals with a high solubility potential, or disposing of final inert state wastes after perfect stabilization pretreatment.

Key words: municipality, landfills, reactor, stabilization, minerals