A Synergy Between Sustainable Solid Waste Management and the Circular Economy in Tanzania Cities: a Case of Scrap Metal Trade in Arusha City

The increased demand for secondary materials, particularly scrap metals, in cities due to development activities both emerging economies and developing countries has the recycling materials. It accelerated growth of circular economy climate-smart development. This paper investigated synergy between sustainable solid waste management Tanzanian by examining business’s categories, quantity, market, nature environmental benefits Arusha. study found that iron steel, cast iron, aluminum were most common metal recovered traded Offices institutions, households, garages primary sources scraps. Over 314 tonnes monthly city. business helped steel industries save 300 tons ore, 164 coal, 64 bauxite while lowering their energy consumption 56%. Scrap trade contributes significantly recycling, climate-smart, economy, improving livelihoods. As a result, we call synchronized system connects product design, manufacturing, end-of-life products improve economy.