Optimizing Transportation Cost of Solid Waste: a case study in the New Juaben Municipality

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Ridding our cities, towns and communities of filth has been one of the major concerns of various governments in Ghana. Metropolitan, Municipal and District Assemblies have the responsibility of ensuring that the populace is not engulfed with filth to the detriment of their health. Owing to the skyrocketing prices of petroleum products and high maintenance cost of vehicles used in the collection and transportation of solid waste by Zoomlion in the New Juaben Municipality. This thesis sought to determine the number of trips each type of vehicle (skip, compactor and roll-on) used in the transportation should go per day to minimize operational cost. The problem was formulated as an Integer Linear Programming problem and was solved using the software AMPL and the CPLEX solver. The results show that if only one roll-on vehicle makes 14 trips per day, the expected quantum of solid waste needed to be hauled to the landfill site at Akwadum, 5km away, per day, can be achieved at a minimum cost of GH70.
A thesis submitted to the School of Graduate Studies, Kwame Nkrumah University of Science and Technology, Kumasi, in partial fulfilment of the requirements for the award of the Degree of Master of Science in Industrial Mathematics,