Evaluating and modelling a decentralised community-based waste collection system in developing São Tomé city

Fernández Braña, Álvaro; Dias-Ferreira, Célia

http://hdl.handle.net/10400.2/13214

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Authors

Fernández Braña, Álvaro

Dias-Ferreira, Célia

Abstract(s)

A small-scale waste collection service by means of a motor tricycle was put in place by the community of Boa Morte (in São Tomé e Príncipe), as a solution to face the lack of an adequate waste management in their neighbourhood. A qualitative and quantitative evaluation of the service was performed by the authors, including a characterisation of the generated waste, interviews with the population involved, a technical assessment and the development of a cost model. With respect to technical aspects, the vehicle chosen has been found to be a satisfactory choice, whereas the productivity of collection is still too low due to the dispersion of collection points. Concerning financial aspects, the cost model reveals that the scale of the scheme is still too small to be completely sustained by its own revenues, but this objective of self-sustainability is achievable within the limits defined for the system, by adding a determined number of new customers without exceeding the fixed maximum working time and introducing some improvements and time optimisation.