Determining the location of temporary landfills with simultaneous set covering model.

The average amount of waste produced by the city of Yogyakarta reaches 260 tons per day. The volume of waste produced by the Ngasem-Gading sector (a sector in Yogyakarta City) exceeds the available temporary landfills' capacity. The volume of waste per day generated by households and markets is 293.76 m3, while temporary landfills' capacity is 189 m3. This study aims to determining the capacity of temporary landfills in accommodating waste sources with a simultaneous approach. The first step to address this inequality is location screening, which identifies facilities that can be enlarged and looking for new possible locations. The next step is to optimize using a set covering problem model by considering the capacity, type of facility, and area using pure integer non-linear programming (PINLP). From the processing results, it is obtained that it is sufficient to operate 13 of the 21 available facilities, with details of maintaining 5 old facilities, expanding 7 facilities, and opening 1 new facility. The total capacity of the 13 facilities is 315.18 m3 so it is expected to be able to accommodate sources of waste from the community and markets in the Ngasem-Gading Sector. [ABSTRACT FROM AUTHOR]