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==External links==
==External links==
* [http://www.sodis.ch/Text2002/T-Research.htm Scientific Publications on Solar Water Disinfection] at the SODIS website. Links to PDF format articles.
* [http://www.sodis.ch/Text2002/T-Research.htm Scientific Publications on Solar Water Disinfection] at the SODIS website. Links to PDF format articles.
* [http://imageevent.com/bobmetcalf/watertestingpasteurizationinafrica;jsessionid=ziw8fco341.tiger_s?n=0&z=2&c=4&x=1&m=24&w=0&p=0 Water testing & Pasteurization in Africa] - A guide to water testing without access to a laboratory, and how to pasteurize contaminated water using sunshine and a simple solar cooker. Images with captions, by Bob Metcalf.


===Project links===
===Project links===

Revision as of 14:39, 14 November 2007

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Sterilize drinking water using the heat of the sun.

SODIS - solar water disinfecting with soda bottles and sunlight

Solar water disinfection, or W, is a method to disinfect water using sunlight and PET bottles.

Using reflectors

Enhancement of Solar Water Pasteurization with Reflectors, Negar Safapourdagger and Robert H. Metcalf, 1998, Department of Biological Sciences, California State University Sacramento, Sacramento, California.

This uses simple cardboard based reflectors and a black jug. Heat is considered by the authors to be the more reliable mechanism for disinfection.

Temporary content from "Solar water treatment"

You can pasteurize water in clear plastic bottles by exposing them to the sun.

<img src="http://i84.photobucket.com/albums/k18/gmoke/SODIS.jpg" alt="" title="" />

The <a href="http://www.sodis.ch/">Solar Water Disinfection (SODIS)</a> process is a simple technology used to improve the microbiological quality of drinking water. SODIS uses solar radiation to destroy pathogenic microorganisms which cause water borne diseases.

SODIS is ideal to treat small quantities of water. Contaminated water is filled into transparent plastic bottles and exposed to full sunlight for six hours.

Sunlight is treating the contaminated water through two synergetic mechanisms: Radiation in the spectrum of UV-A (wavelength 320-400nm) and increased water temperature. If the water temperatures raises above 50°C, the disinfection process is three times faster.

You can raise the temperature of the water in transparent bottles by putting them in the sun against a dark background.

History

Prof Aftim Acra of Lebanon researched this technique beginning in 1979. See Cleaning water with sunshine, Robert Bourgoing, IDRC Reports, April 1989. (or the original format with image, in PDF.) See also An Interview with Aftim Acra, Professor Emeritus of Environmental Sciences, Winter 2004.

External links

Project links

  • The Contacts page on the SODIS website has many case examples in PDF form.


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