抄録
The mass balance and cost of municipal solid waste composting facilities that handle various types of organic waste were studied. Compost samples from the facilities were analyzed for moisture, ash and carbon, and cost of the facilities were analyzed and compared. The mass balance was calculated on a dry weight basis because the moisture content of organic waste is very high. Even though the ratio of bulking material to total input varied in the range 0-65% on a dry basis, the carbon and ash content were clearly influenced by the different characteristics of the input waste. The influence of bulking material, however, was not clearly determined, and there no significant correlation to the type of waste was observed. The operating costs were categorized into two groups. There was some economy of scale for wages and maintenance cost, but the cost for electricity and fuel were proportional to the amount of waste. Differences in operating costs can be explained by differences in the process characteristics.
