Urban waste management and the environmental impact of organic waste treatment systems in Kampala, Uganda

摘要: In Kampala, Uganda, about 28,000 tonnes of waste are collected and delivered to landfill every month. Kampala Capital City Authority records show that this represents approximately 40 % the generated in city. The remaining uncollected is normally burnt and/or dumped unauthorised sites, causing health environmental problems. However, organic fraction domestic can provide an opportunity improve livelihoods incomes through fertiliser energy production. This study employed environmental systems analysis identify most environmentally efficient technologies for treating generated. work was undertaken interrelated studies. These were a literature review hierarchy practices suitable development sub-Saharan African city using as case study; physical chemical characterisation municipal Kampala’s over span year cover both dry wet seasons; mapping location animal farms establishment feeding management on Kampala; treatment Kampala's by means vermicompost method finally life cycle best out anaerobic digestion, compost, fly larvae technologies. impact categories assessed use, global warming eutrophication potentials. Generally, results showed re-use prevention methods feasible development Kampala: 92 nature, containing average moisture content 71.1 %, 1.65 nitrogen, 0.28 phosphorus, 2.38 potassium gross 17 MJ/kg; located periphery city, popular feeds are peelings pasture; 60 manure discarded 32 used fertiliser; 60.3% material degradation achieved process while feed-to-biomass conversion rate 3.6 matter basis; digestion performs terms global potential potential. However concluded poorly managed technology with extensive methane leakages will make considerable contribution warming. Further research needed establish viability composting Africa measure direct emissions from different sub-Sahara setting.