Nov 14, 2017

Update of Design and Best Practices of an Intermittently Operated Slow Sand Filter - ISSF

In 2011 Samaritan’s purse, in Cambodia, utilized slow sand filtration and BSF principles to develop a filter appropriate for institutional scale use, such as that of schools. In 2012 a standard design was developed and subsequently a performance study was conducted in 2014 affirming the efficacy of the design principles in E.coli removal. Since then, Samaritan’s purse has continued to adapt the standard design in multiple contexts in 8 countries around the world to address biological contamination. In January 2017, Samaritan’s Purse in partnership with CAWST, published “Technical Manual: Intermittently Operated Slow Sand Filtration (iSSF) System” to be used by implementers wanting to use the design. Samaritan’s Purse has surveyed its field staff to provide updated insight on field adaptations of the technology and in this session will reintroduce basic design principles as alignment with the published manual as well as applicable insight gleaned since the January 2016 webinar hosted by CAWST.

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CAWST is a Canadian charity and licensed engineering firm. We address the global need for safe drinking water and sanitation by building local knowledge and skills on household solutions people can implement themselves.

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This project is made possible by the generous support of the American people through the United States Agency for International Development (USAID). The contents are the responsibility of CAWST (Centre for Affordable Water and Sanitation Technology) and do not necessarily reflect the views of USAID or the United States Government.

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