Organised source separation of household waste – pilot study of university staff residences in Ghana

The purpose of this paper is to present the results and experiences of a pilot source separation of household solid waste conducted in households of staff of Kwame Nkrumah University of Science and Technology in Ghana.

The project covered fifty-three households and weekly separated household waste samples were analysed for eighteen weeks. Households were provided with two dustbins and a weekly supply of plastics bags into which they were to deposit their organic, plastic and other wastes. The set-out rate, households’ level of compliance, separation efficiency, average waste generation rates and waste composition were calculated. On the average 67.6% and 80.5% of households from senior staff and junior staff areas separated waste in to the three categories requested for respectively. On the average only 1.09% of households had contaminants above 50% in the organic waste bin, whilst 29.51% and 29.55% of households had contaminants above 50% in the plastic’s bag and other wastes bin respectively. The separation efficiency of 93.31%, 49.9% and 56.18% was achieved for organic, plastic and other wastes respectively. Waste separation efficiency and level of compliance was general higher in the junior staff households. Organic wastes constitutes 69.2% of the total wastes analyzed with other wastes, plastics, paper, metals, textiles and glass constituting 13.4%, 7.3%, 4.4%, 2.6%, 1.8% and 1.3% respectively. The average waste collected per household per week was 1.62kg. It can be anticipated the about 80% of waste generated from staff households could be diverted from the landfill with the composting of organic wastes, recycling of plastic films, rigid PE and PP plastics and metals, reuse of PET and PVC bottles. The willingness and the ability of staff households to separate their waste has been demonstrated through this pilot project and provides data for planning future waste management strategies which may include waste separation at source.



Copyright: © European Compost Network ECN e.V.
Source: Orbit 2008 (Oktober 2008)
Pages: 9
Price: € 9,00
Autor: Ms Mizpah Asase
Dr. Moses Y. Mensah
Samuel K. Amponsah

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