FEASIBILITY STUDY ON RENEWAL OF AGING WASTE INCINERATION PLANTS UNDER DECLINING POPULATION - WITH CONSIDERATION OF DOWNSIZING FACILITY SCALE BY POSTPONEMENT OF FACILITY RENEWAL -

Abstract

 This study aimed to evaluate feasibility of facility renewal for aging municipal waste incineration plants under declining population, as a case study at Sensyu area in Osaka prefecture. In this study, we considered various driving factors, such as changes in charged cost to the local governments, uncertainty in population change, changes in renewal period, downsizing facility scale, and so on. In addition, perspectives for future facility maintenance were discussed in local areas with increasing waste treatment costs under population decline. As a result, it was revealed that periodical fundamental facility improvement contributes to reduce maintenance costs in mid and long term. Moreover, the study also revealed various enhancing strategies to reduce waste treatment costs, such as wide-area treatment by collaboration among local governments, increasing actual operation days than those in the operation plan, in addition to the periodical facility improvement, etc.