Abstract
Objective. To increase reduction in amounts of final disposal of waste and to improve the recycling rate, environmental loads and costs are weighed in this study, giving attention to the presence or absence of separate collection of plastic containers and packages for collection and gasification melting methods, and to stoker + ash melting method as an intermediate treatment.
Results and Discussion. Results show that the gasification melting method and stoker + ash melting method should be selected appropriately depending on the facility’s incineration capacity. Furthermore, influences of the presence or absence of separate collection of other plastics on environmental loads and costs should not be great.
Conclusions. Using the stoker + ash melting method, power consumption is less, as is the trend of environmental loading, than those of the gasification melting method. Although no great cost difference is apparent up to annual incineration amounts of about 60 kt, gasification melting method gives lower costs for amounts exceeding that level.
