Browsing by Author "Robera Bayissa"

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    Modelling Municipal Solid Waste GHG Emissions in Addis Ababa: a System Dynamics Approach
    (A.A.U, 2025-06-17) Robera Bayissa; Zerayehu Sime (PhD)
    This study employed a system dynamics model to evaluate greenhouse gas (GHG) emissions of municipal solid waste (MSW) management in Addis Ababa from 2022 to 2034 through the simulation of five treatment scenarios: Business as Usual (BAU), Organic Waste Diversion and Improved Sorting, Energy Recovery Maximization, Recycling-Driven Circular Economy, and a Combined Low Emission strategy. According to the BAU scenario led to faster saturation of the landfill and higher methane emissions, while Organic Diversion and Circular Economy scenarios achieved considerable emission reduction and jobs from recycling and composting. Energy Recovery Optimization scenario optimized incineration, reducing landfill usage but the CO₂ hasn't declined as in the other policy scenarios despite the net cost increasing significantly. The Integrated Low Emission scenario with over 70% efficiency in separation, 25% recycling, 30% composting, and 40% use of waste-to-energy created the lowest overall GHG emissions, less than half of BAU by 2035, and produced the most sustainable outcome in all three aspects: environmental, economic, and social. These findings underlie the importance of integrated, low-emission waste strategies to facilitate a contribution from Addis Ababa to achieving Ethiopia's Climate Resilient Green Economy (CRGE) goals.