Made Gunamantha*, Chafid Fandeli**, Shalihuddin Djalal Tandjung**, Sarto**
* Universitas Pendidikan Ganesha Singaraja
** Universitas Gadjah Mada Yogyakarta
Email: md_gunamantha@yahoo.com
Various solid waste management (SWM) system scenarios were developed and compared for solid waste managed in KARTAMANTUL region by using life cycle assessment (LCA) methodology. The solid waste management methods considered in the scenarios were landfilling without and with energy recovery, incineration, gasification, and anaerobic digestion. The goal of the study was to assess indicators in determining the most suitable environmentally aspect of SWM system options. The functional unit of the study was the ammount of solid waste managed. The life cycle inventory analysis carried out by including the assumtions made for each processes in the SWM system. Energy production and inventory emissions were calculated and classified in to impact categories; global warming, acidification, eutrophication, and photochemical oxidant. Impact categories indicator were quantified with equivalence factors of relevan emissions to develope the environmental profiles of each scenario. In most of the categories, direct gasification was found to be the most feasible method, except the acidification. Sensitivity analysis has been used to test some of the assumptions used in the influence of variety input to the results but none have effect on the overall result. Therefore, the best alternative to the existing SWM can be identified.
Keywords: solid waste management system, life cycle assessment, life cycle inventory, impact categories