Iron-amended Biosand Water Filter in Nepal     Tommy Ka Kit Ngai, M.Eng., Ph.D.       Director, Research Learning         ...
Team membersCAWST is a Canadian-based nonprofit that provideseducation, training and consulting services to practitioners,...
Project goal• Provide safe drinking water in two impoverished rural villages in  Nepal where disadvantaged and marginalize...
The challenge• Water source is contaminated by all three classes of water-borne  contaminants (protozoa, bacteria, and vir...
The solution• We recently developed a revolutionary technique of modifying the  conventional Biosand Filter (BSF) with iro...
Scientific principle                                            Iron Particle• Both viruses and sand particles are negativ...
Advantages• Simple operation & maintenance• Inexpensive ($30/filter serving a family)• Long-lasting (15+ years)• Socially ...
Project plans1. Providing training on iron particle amendment and   entrepreneurial skills to the current network of biosa...
What the prize means to our teamWinning this award means a lot to our team. We are particularlypleased that:•Reed Elsevier...
Your suggestions and feedbacks are highly              appreciated
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Iron-amended Biosand Water Filter in Nepal

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The 2012 Reed Elsevier Environmental Challenge winner of the $50,000 first prize is the "Iron-amended Biosand Water Filter in Nepal" developed by Tommy Ngai, Director, Research Learning at the Centre for Affordable Water and Sanitation Technology (CAWST). Ngai's project modifies conventional Biosand Filters with iron particles to remove all three classes of water contaminants, including viruses, and bring safe drinking water to two impoverished rural villages in Nepal. Over a period of two years 150 filters will be installed, and CAWST will update its educational material and hold workshops to promote the technology. The project will target over 1,000 people in the two villages and has the potential to be scaled to help millions over the next 10 years.

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Iron-amended Biosand Water Filter in Nepal

  1. 1. Iron-amended Biosand Water Filter in Nepal Tommy Ka Kit Ngai, M.Eng., Ph.D. Director, Research Learning CAWST Bay 12, 2916 – 5th Avenue NE Calgary, Alberta T2A 6K4, Canada Tel: +1-403-243-3285 ext. 225 Email: tngai@cawst.org
  2. 2. Team membersCAWST is a Canadian-based nonprofit that provideseducation, training and consulting services to practitioners,including governments, non-governmental organizations, UN-agencies, to initiate and/or expand their water and sanitationprograms. Since 2001, our clients have impacted 6.0 millionpeople with better water or sanitation technologies.University of Illinois at Urbana-Champaign is a leadingengineering research institution consistently ranked ashaving one of the top Environmental Engineering andScience (EE&S) programs in the U.S.ENPHO is a nationally-recognized technically-oriented NGOestablished in Nepal and operated by Nepali citizens. Since1991, ENPHO has successfully demonstrated anddisseminated a wide variety of appropriate water, sanitation,and energy technologies across the country.
  3. 3. Project goal• Provide safe drinking water in two impoverished rural villages in Nepal where disadvantaged and marginalized households suffer greatly from water-borne diseases and the associated economic consequences caused by unsafe water
  4. 4. The challenge• Water source is contaminated by all three classes of water-borne contaminants (protozoa, bacteria, and viruses).• Conventional technologies are cost-prohibitive and unsustainable in this rural mountainous region.• There is not any low-cost, simple and user friendly technology appropriate for the region and is capable of removing all contaminants.
  5. 5. The solution• We recently developed a revolutionary technique of modifying the conventional Biosand Filter (BSF) with iron particles to reduce all three classes of contaminants, including viruses.• Proven success in Guatemala
  6. 6. Scientific principle Iron Particle• Both viruses and sand particles are negatively charged. Viruses stays in water.• Iron particles are positively charged, thus remove viruses from water.
  7. 7. Advantages• Simple operation & maintenance• Inexpensive ($30/filter serving a family)• Long-lasting (15+ years)• Socially well-accepted• Constructed by local technicians using locally available materials such as gravel, sand, and cement.• No replacement parts• No external energy or reagent required
  8. 8. Project plans1. Providing training on iron particle amendment and entrepreneurial skills to the current network of biosand filter social entrepreneurs in Nepal.2. Conduct participatory education workshops in project villages on water, sanitation, hygiene, health, and filter operation and maintenance.3. Construct 150 filters by leveraging labour and material contributions from villagers.4. Conduct on-going household visits to test filter performance and to ensure consistent, correct long-term use.5. Update CAWST educational material regarding the iron-particle technique.6. Share the results through Science Direct and CAWST’s network of clients in 60+ countries.
  9. 9. What the prize means to our teamWinning this award means a lot to our team. We are particularlypleased that:•Reed Elsevier is supporting the Government of Nepal and otherdevelopment agencies operating in Nepal in providing safe water toreduce illnesses and deaths.•Over 1000 disadvantaged or marginalized villagers will obtain safedrinking water using an improved and sustainable technology.•The capacity of local entrepreneurs and government will be built.•Reed Elsevier is recognizing both the potential of the iron-amendedbiosand filter to address the technological gaps in household watertreatment, and the proven impact of CAWST’s technology transfermodel to disseminate the technology globally.
  10. 10. Your suggestions and feedbacks are highly appreciated

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