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Evaluation of the long-term sustainability of biosand filters in rural Ethiopia
conference contribution
posted on 2018-02-12, 15:07 authored by Paul Earwaker, J. WebsterPoint-of-use
water treatment is growing in popularity in the developing world, especially in rural areas
where the costs of providing centralised treatment systems are higher than their low cost counterparts.
One such technology, the biosand filter, has been shown to effectively remove turbidity and pathogens in
laboratory and field research but the long-term
performance of the filter and its sustainability are not
well documented. An evaluation was therefore conducted to examine filters in rural Ethiopia installed
more than 5 years previously. Filters were examined to assess filter performance, maintenance practices
and the supporting environment. The working filters showed an average E.coli reduction rate of 87.9%
with 75.7 % of filtrate samples achieving rates of <10cfu/100ml and 81.2% achieving turbidity values of
<5NTU. The varied levels of usage in the three study villages, from 44% to 100%, also highlighted
several risks and opportunities for continued active long term adoption.
History
School
- Architecture, Building and Civil Engineering
Research Unit
- Water, Engineering and Development Centre (WEDC)
Published in
WEDC ConferenceCitation
EARWAKER, P. and WEBSTER, J., 2009. Evaluation of the long-term sustainability of biosand filters in rural Ethiopia. IN: Shaw, R.J. (ed). Water, sanitation and hygiene - Sustainable development and multisectoral approaches: Proceedings of the 34th WEDC International Conference, Addis Ababa, Ethiopia, 18-22 May 2009, 5p.p.Publisher
© WEDC, Loughborough UniversityVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2009Notes
This is a conference paper.Other identifier
WEDC_ID:10229Language
- en
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