Abstract
There are a variety of alternative disposal methods for organic waste treatment system in uiban cities. As for an optical decision-making, a computer model for systematic assessment of organic waste materials from waste disposal, waste water disposal and self-composting system, which enables a comparison of the outcome brought by kw policies among these alternative methods was developed. The future projection of the waste streams in each system for thirty years with a good reflection of citizens' choice among diverse waste disposal methods characterizes this model. The amount of carbon dioxide emission and the cost were employed as indexes for the assessment. This model has flexibility for the future changes in waste management options and in recycling methods.