Center for Energy Technology

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Browsing Center for Energy Technology by Author "Belete, Zerayakob"

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    Analysis & Development of Solid Waste Management System of Addis Ababa
    (Addis Ababa University, 2002-01) Belete, Zerayakob; Kitaw, Daniel(phd)
    Solid waste, which is a consequence of day-to-day activity of human kind, needs to be managed properly. Addis Ababa like other cities in developing countries, faces problems associated with poorly managed waste collection operation. This thesis deals with the city’s current solid waste management problems, collection and disposal. The city’s refuse collection operation is modeled using queuing/simulation model. Spreadsheet Monte Carlo simulation technique is used to simulate the collection activities of the vehicles. In a similar manner, the average waite time of the customer( unit volume of waste) is also simulated. The result obtained shows that the collection operation is affected by the relative location of zonal centroid with reference Repi landfill site. Based on the simulation result, vehicle performance in collection operation is also evaluated. The number of vehicles that are required to carry out the operation has been calculated. In regard to solid waste disposal, alternative models are evaluated to meet the city’s disposal need. Land filling with other disposal options is found to be better alternative. The four proposed landfill sites are modeled using linear programming technique for optimized collection/disposal operation. Energy recovery potentials of various disposal options like landfill, incineration and anaerobic digestion have been assessed. Material recovery potential of the city’s refuse is also evaluated for reprocessing. Better solid waste management option is also proposed.