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Assessment of Municipal Organic Solid Waste, as a Potential Feedstock for Briquette Production in Kampala, Uganda

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Document pages: 14 pages

Abstract: Thecurrent shortage of energy resources coupled with environmental degradationproblems resulting from deforestation in Uganda has contributed to increaseddemand for renewable energy resources including municipal organic solid wasteand agricultural residues. However, organic waste from Municipal Solid Waste(MSW) may contain contaminants that are harmful to public health and theenvironment. This study determined the heavy metal concentration in MSW inKampala City, Uganda. Also, the physicochemical properties of briquettesproduced from the MSW were compared with charcoal. The waste samples were collectedfrom residential, institutional and market areas over a period of two weeks. They were then analyzed for the presence ofheavy metals. Briquettes were made from the bio-waste and were subjected to calorific and proximate analysis.Results indicated that the mean concentrations of Cd, Cr, Cu, Fe, and Pb were1.25 mg kg, 2.04 mg kg, 38.2 mg kg, 3.97 mg kg and 1.99 mg kg respectivelywhile Hg was not detected. The calorific values of briquettes ranged from 8.9to 15.3 MJ kg and were lower than those of charcoal. Heavy metal concentrationsin bio-waste collected were below the permissible acceptable limits. These findings indicate that the sampled MSW does not pose a health hazardarising from the presence of such heavy metals and therefore could be a safesource of renewable energy.

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