Browsing by Author "Mboowa, Drake"

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    Energy potential of Municipal Solid Waste in Kampala, a Case Study of Kiteezi Landfill Site
    (African Journal of Environmental and Waste Management, 2017) Mboowa, Drake; Kabenge, Isa; Banadda, Nobel; Kiggundu, Nicholas
    Less than 10% of the population have access to electrical and thermal energy in Uganda and there is a heavy dependence on wood fuel as a source of energy. In this study, the energy potential of Municipal Solid Waste at Kiteezi landfill, Kampala was qualitatively determined by carrying out Municipal solid waste (MSW) characterization, proximate analysis, and calorific value measurements. The samples were picked on different days and for each day, waste was randomly selected from five garbage trucks coming from residential areas (private trucks) and commercial areas (Kampala City Council Authority trucks). It was then sorted, weighed and packed in polythene bags and take to the laboratoty for analysis. Waste from the commercial areas consisted of 87.3 % food and yard waste, 2.0% papers, 0.4% plastics, 3.6% polyethylene, 2.2% water bottles, 0.9% textiles, 1.9% Glass, 0.2% metals, and 1.6% others. Whereas the waste from residential areas comprised of 94.4% food and yard waste, 1.2% papers, 0.3% plastics, 2.3% polyethylene, 0.6% water bottles, 0.4% textiles, 0.3% Glass, 0.1% metals, and 0.4% others. The organic waste on average had moisture content (8.69 wt. %), volatile matter (73.3 wt. %), fixed carbon (3.22 wt. %), and ash content (13.65 wt. %) on a dry basis. The organic waste also had a gross energy content of 19.26 MJ/Kg of dry matter. It was concluded that the organic waste generated in Kampala city can contribute positively to the energy sector.
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    Estimation of Methane Generation Based on Anaerobic Digestion and Mass Balance at Kiteezi Landfill, Kampala, Uganda
    (African Journal of Environmental Science and Technology, 2015) Mboowa, Drake; Banadda, Noble; Kiggundu, Nicholas; Kabenge, Isa; Komakech, Allan John
    Kiteezi landfill site is the main solid waste dumping site in Kampala City (Uganda). In this study, the generation of methane from waste at Kiteezi landfill was measured using laboratory-scale anaerobic digestion experiment and estimated using the Mass balance model. The samples were collected in the wet and dry seasons, with five replicates for each season which were processed for further experiments focused on moisture content analysis and anaerobic digestion. The moisture content analysis results showed a significant change (P < 0.05) between wet season and dry season. Also, the anaerobic digestion revealed that moisture content was a determining factor in gas generation. The average monthly methane production estimate from the mass balance model was 1.63 Gg methane/month and was comparable (within 14%) to the amount estimated by laboratory-scale anaerobic digestion experiment (1.43 Gg methane/month). It is a worthwhile undertaking to further investigate the potential of commercially producing methane from Kiteezi landfill as an alternative source of green and clean energy for urban masses.