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31 items found (Showing 1 - 10)
  1. Rating: 3.0 - 1 Vote
    2005-07-20 “Gray water” (also “grey water,” “graywater” or “greywater”) is the term used to describe wastewater from dish washing, laundry, bathing, and rinsing. (Note: the term gray water does not refer to toilet waste, which is often called “black water.”) Although gray water does not need extensive...
  2. 2001-01-01 Access to clean drinking water remains one of the greatest challenges in the world. The BioSand Filter is one method that can be used for purifying water at the household level. With this filter, contaminated water is filtered through a natural biological layer and then layers of sand, pebbles...
  3. Rating: 3.0 - 1 Vote
    2006-01-20 Seeds ofMoringa oleiferacan be used to treat water in an emergency or disaster situation. Studies since the early 1970’s have found the seeds to be highly effective in removing suspended particles from water with medium to high levels of turbidity.
  4. Rating: 3.0 - 1 Vote
    1996-07-19 Solar water disinfection can be used to reduce bacteria counts in small volumes of drinking water at the individual household level.
  5. Rating: 2.0 - 1 Vote
    2001-07-20 After the publication of our article on clay water filters (EDN71-4), we were questioned about the safety of colloidal silver.
  6. Rating: 4.0 - 1 Vote
    1993-12-19 More information about using Moringa seeds for water treatment.
  7. Rating: 4.0 - 1 Vote
    2006-01-20 Solar Disinfection of Water (SODIS) is a way to disinfect water by using ultraviolet (UV) rays from the sun to destroy harmful microorganisms.
  8. Rating: 2.0 - 1 Vote
    2004-04-20 Filtering water through old clothes can effectively remove many of the copepods (a type of zooplankton) that carry cholera-causing bacteria. Researchers from the University of Maryland, College Park, did a study in Bangladesh comparing the effectiveness of old saris and nylon filters for...
  9. Rating: 2.0 - 1 Vote
    1997-11-19 Discussion of possible disease organisms in manure. Many of us probably assume health problems originate when food is washed with contaminated water or because of poor human hygiene. However, it could also come from the use of manure as a fertilizer in the field.
  10. Rating: 3.0 - 1 Vote
    2006-07-20 In EDN Issue 80 (July 2003), we asked for feedback from our network about raising soybeans in the tropics. We heard back from several people and would like to share their responses.