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Solar water disinfection, or {{WP|SODIS}}, is a method to disinfect water using sunlight and PET bottles. | Solar water disinfection, or {{WP|SODIS}}, is a method to disinfect water using sunlight and PET bottles. | ||
==Using reflectors== | |||
[http://aem.asm.org/cgi/content/full/65/2/859 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"== | ==Temporary content from "Solar water treatment"== | ||
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You can raise the temperature of the water in transparent bottles by putting them in the sun against a dark background. | 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 [http://www.bourgoing.com/presse/libancrdienglish.htm Cleaning water with sunshine], Robert Bourgoing, ''IDRC Reports, April 1989.'' (or | |||
[http://idrinfo.idrc.ca/archive/ReportsINTRA/pdfs/v18n2e/108893.pdf the original format with image, in PDF].) See also [http://wwwlb.aub.edu.lb/~webmgate/winter04/reflections.html An Interview with Aftim Acra, Professor Emeritus of Environmental Sciences], Winter 2004. | |||
==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. | |||
Revision as of 12:50, 14 November 2007
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
- Scientific Publications on Solar Water Disinfection at the SODIS website. Links to PDF format articles.