Evaluation of the energy potential of municipal solid waste for incineration: Ajo open dumpsite, Hosanna, Ethiopia

Abstract

The concern of municipal solid waste in developing countries like Ethiopia is a headache for it is underrated and due attention is not given by concerning bodies. A proper method of handling and disposal of municipal solid waste (MSW) in Hosanna City (with a single dumpsite: Ajo/Mazoria), is a critical issue that needs to be addressed. Evaluating the energy potential of municipal solid waste for incineration would facilitate the development of viable solutions. In line with that, researchers conducted evaluations of the energy potential and feasibility for incineration of the MSW at the dumpsite. Experimental analyses of the samples were conducted to determine the waste compositions in the chemistry department lab at Wachemo University based on ASTM standards. The weekly analysis showed that the main compositions of the MSW generated at the study site were food waste, chat waste, and fruit waste, which accounted for 55 % of the total waste by weight. The average calorific value of the waste was estimated to be 19.51 MJ/kg, having moisture content of 55.65 %. The net energy potential of the MSW in the study site was calculated to be 7.21 MJ/kg, with a waste to energy conversion efficiency of 83.35 %. Accordingly, incineration of the MSW at the study site might be a feasible strategy to manage the waste being disposed of while recovering sufficient energy from it.