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Issue 1, 2016
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Optimisation and costing of faecal sludge management options for Lusaka's informal settlements

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Abstract

Faecal Sludge Management (FSM) is achieving traction in developing countries as a technical solution for the safe management (collection, transportation and in some cases treatment and end-use/safe disposal) of Faecal Sludge (FS) captured by onsite systems. Whilst some approaches do exist the overall availability of tools, data and practical examples to support decision makers in the implementation of FSM services on the ground is limited. This study aims to address some of these sector limitations by presenting a long-term costing methodology that was developed for two informal settlements in Lusaka, The Republic of Zambia. The approach compares the costs associated with a number of feasible fixed infrastructure and transportation technology scenarios over a 25 year design period. Within the analysis a spatio-topological tool was utilised to model proposed FSM networks and allowed the path of least-time transportation to be identified. This was then used to calculate Net Present Value and Average Incremental Cost, for seven different FSM scenarios, over a 25 year design life. The results of the study show that FSM could provide an affordable solution for the provision of sanitation services to Lusaka's poorest communities. The research conducted aims to support planners in Lusaka but also presents a number of methodologies that could be beneficial to the wider sanitation sector.

Graphical abstract: Optimisation and costing of faecal sludge management options for Lusaka's informal settlements

  • This article is part of the themed collection: Sanitation
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Publication details

The article was received on 16 Jul 2015, accepted on 10 Sep 2015 and first published on 11 Sep 2015


Article type: Paper
DOI: 10.1039/C5EW00179J
Citation: Environ. Sci.: Water Res. Technol., 2016,2, 97-106

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    Optimisation and costing of faecal sludge management options for Lusaka's informal settlements

    R. Kennedy-Walker, T. Holderness, D. Alderson, J. M. Amezaga and C. A. Paterson, Environ. Sci.: Water Res. Technol., 2016, 2, 97
    DOI: 10.1039/C5EW00179J

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