Abstract
The purpose of this study is to analyze the optimal scale on areal integration and the best-case scenario on waste treatment programs for the area-wide planning of municipal solid waste management. We made the cost functions to examine the efficiency caused by the regional waste treatment from a financial perspective. This paper proposed an optimal model taking into consideration the landfill disposal. The purpose of this model is to minimize the total cost under the conditions of the reduction levels of the amount of landfill disposal. It was proved by optimal model analysis that our model could help to decide the most economical boundaries of planning area and the best combination of waste treatment programs.