LifeStraw Family 2.0
- Vestergaard Frandsen and Del Agua Health Limited targeted Rwanda for the LifeStraw® Family 2.0 purifiers.
Trademarked – LifeStraw® Family 2.0 water filter is a registered product of Vestergaard Frandsen.
In July 2012, DelAgua piloted & distributed 100+ Vestergaard-Frandsen LifeStraw® Family 2.0 water filters in the Western Province of Rwanda.
- LifeStraw Family 2.0 achieves ultrafiltration via hollow fiber technology whereby water is forced through narrow fibers under high pressure. When untreated water is poured into the feed water bucket, the textile prefilter removes coarse particles larger than 80µm. Gravity pushes the water with particles finer than 80µm to flow towards the membrane cartridge. Ultra filtration takes place in the membrane cartridge – a pore size of 20 nanometre retains bacteria, viruses, parasites and fine dirt particles. Filtered water collects in the safe storage tank, which has a capacity of 5 liters and includes a tap to provide an outlet for purified water. The storage tank can be opened for cleaning. Backwashing of the membranes is done by pressing down on the cleaning lever. Dirty water flows to the small red tank. The dirty water should then be discarded.
Community Health workers and the Del Agua Country Team provide technical support for Lifestraw® Family 2.0. Minimal training and assembly is required by the customer/user.
No replacement components are stated as being necessary. Schematic does refer to an ‘ultrafiltration membrane cartridge’ but no replacement requirement of this is mentioned elsewhere.
LifeStraw® Family 2.0 water filters up to 30,000 L of water , enough to supply a family of five with clean drinking water for three to five years.
• Estimated lifetime filtration capacity of 30,000 liters • Removal of 99.9999% bacteria • Removal of 99.99% protozoan parasites • Removal of 99.999% viruses • Removes turbidity • Does not require electrical power, batteries, or replacement parts.
Lifestraw® Community purifiers use LifeStraw® Family ultrafiltration technology, which: • Satisfies the criteria of the “Highly Protective” category for microbiological performance specifications as defined in WHO’s 2011’Evaluating Household Water Treatment Options: Health-based targets and microbiological performance options • Complies with the US Environmental Protection Agency (EPA) 1987 Guide Standard and Protocol for Testing Microbiological Water Purifiers
Also an evaluation and adoption of health impact of the filters was carried out by by the London School of Hygiene and Tropical Medicine
Vestergaard Frandsen have tested Lifestraw® products via labs at Intertek, Vietnam, The University of Arizona Department of Soil, Water and Environmental Science. Para Membranes Co. Ltd, Korea, Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London
Users must be cautious with avoiding cross contamination of the clean water container and not consume water from backflush.
Lifestraw® Family 2.0 filters work best with a table mount or other raised surface.
Designing and Piloting a Program to Provide Water Filters and Improved Cookstoves in Rwanda, Barstow CK et al. (2014) Designing and Piloting a Program to Provide Water Filters and Improved Cookstoves in Rwanda. PLoS ONE 9(3): e92403. doi:10.1371/journal.pone.0092403
Lifestraw® Family 2.0 filters successfully passed Intertek Quality Inspection and complies with the USEPA protocol of Exceeded the requirements for a “Highly Protective” water treatment device as defined by the World Health Organization. UN’s Clean Development Mechanism.
Parent company DelAgua utilises mobile data collection and a central database for programme implementation, analysis and record keeping. All distributions, education and evaluation activities are conducted through smart-phone based database tools. The project falls under the UN’s Clean Development Mechanism, with carbon credits being earned only after rigorous external monitoring of continued use of the new water filters and cookstoves and the resultant benefits.
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