Towards Sustainable Solid Waste Management in Nigeria: Integrating Analytic Hierarchy Process and System Dynamics for Policy and Practice

The difference in the nature, volume, and types of waste, coupled with the inherent peculiarity of each environment, has necessitated the need for a sustainable integrated solid waste management (SISWM) framework that fits a particular locality with its inherent and current realities. This study aims to appraise the present state of Solid Waste Management (SWM) practices and present a feasible framework using both qualitative and quantitative techniques. Data collected from Ibadan, south-west Nigeria, using structured questionnaires and interviews were processed using Analytic Hierarchy Process (AHP) and system dynamics modelling and simulation. The result of the Analytic Hierarchy Process shows the major problems in their hierarchy, ranging from inadequate waste collection (0.647), inadequate budget (0.62), inconsistent waste legislation (0.531), inadequate awareness and education for the citizens (0.496), among others. The system dynamics model shows the feasibility of the proposed SISWM system, demonstrating its ability to hold down the waste generation below the waste collection capability of the system. Within the planning horizon. The model also serves as a metric for decision-making in solid waste management, future policy formulation, and practice.