Abstract
The mechanism of municipal refuse production was investigated by examining the close correlation between products and wastes. Consequently, effects of the variation of the constituents of municipal refuse on its characteristics for the recovery of valuable materials by means of is mechanical sorting, as well as for recovering its thermal energy, regarded as fuel, were studied. An estimation method of the average constituents of municipal refuse was proposed on the basis of national statistical data of production, export, import and re-use in Japan. An investigation was next carried out, at a pilot plant at Kyoto, into the efficiency of mechanical refuse sorting by utilizing several experimental systems consisting of pulverizers, shredders, wind separators and drum screens etc. Furthermore, the characteristics of thermal decomposition and combustion of the refuse as fuel were experimentally revealed after assuming its combustible portion to be a model mixture of cellulosic and plastic materials. Finally, the feasibility and troublesome points of re-usage of municipal refuse are discussed, together with points of potential difficulty.
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