Yutaka Terashima

Department of Environmental and Sanitary Engineering, Faculty of Engineering, Professor, Kyoto University
(Yoshida-honmachi, Sakyo-ku Kyoto 606-01 Japan)

Abstract

Firstly the physical, chemical and biological phenomena in a reclaimed waste bed and their fundamentals were summarized, as the basis for the design and management of a municipal solid waste (MSW) reclamation site, Those points include system function of the waste bed, processes controlling those phenomena, waste characteristics and the waste bed structure controlling those processes, and the bases of aerobic and anaerobic microbiological actions, chemistry of principal metal compounds and physico-chemical interactions. Secondly, behaviours of inorganic pollutants, such as hazardous metals, calcium compounds and chlorides, in the packed or reclaimed bed of incinerated MSW residues, such as bottom and fly ashes, were discussed based on the laboratory and field scale researches reported. These points included migration characteristics of each pollutant in the beds, leachability of each pollutant from the beds evaluated on leachable amount[leached amount/unit weight of waste]and leaching ratio[leached amount/content in unit weight of waste], and characteristics of the leaching process indicated by the change in each pollutant concentration.

Key words: waste reclamation, incineration residue, hazardous metal, inorganic salt, leachability, leachate