Abstract

Harizi Riadh

The purpose of this paper is to evaluate the current distribution of Tunisian landfill solid waste and propose a new organization of Tunisian territory. To better manage waste and establish a territorial equity, we offer a model of reverse logistics that will minimize the waste flow, reducing the overall cost of reverse logistics and create jobs. We observe quantitative data of waste management related to all operational landfills in Tunisia, and we compare it with the results of a new organization of the Tunisian territory. To minimize the total cost of landfill, we propose a deterministic model. The latter takes into account such loading capacity of the landfill, all regional requests, and the binary restriction on the location decision variables (Branch & Bound decomposition and application of fixed charge facility location problems). By using the proposed model together with the concept of rationality, we obtained the best place of every landfill. We recommend the opening of seven new landfills and the closure of six centers sites already operational. Results of our simulation can satisfy the total demand of all Tunisian regions by ensuring landfills capacities and minimizing the distances traveled to transport waste. At the same time, we can ensure territorial equity in meeting the demand regions, and we find that effective waste management involves lowering the overall cost of reverse logistics, which creates jobs.