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Sludgecontest.jpg As part of the Emergency Sanitation Project, the International Federation of Red Cross and Red Crescent Societies announce a student emergency sanitation design project. Deadline 3 March 2014


There are four basic Hexayurt sizes which cover a variety of needs.
What is it? The Hexayurt is a refugee shelter system based on work done at the Rocky Mountain Institute. It uses an approach based on "autonomous building" to provide not just a shelter, but a comprehensive family support unit which includes drinking water purification, composting toilets, fuel-efficient stoves and solar electric lighting. Other systems can be added in a modular fashion.

Is this for real? Yes. Both the American Red Cross and the US Department of Defense have examined the Hexayurt system in detail and found that it has considerable merit and utility. I hope that we will see it in use by international agencies within two years. The best place to get started is to read the slides from the presentation Vinay Gupta gave at the Pentagon in December 2006: Pentagon Presentation (pdf) - 20 pages, not much text, and the best summary of the system we currently have online.

Ersson rainwater harvest and purification (original)

Rainwater catchment and purification system, at less than $1500, for the majority of household use.

AudenLibraryOfCongress.jpg
Thousands have lived without love, not one without water.

W. H. AudenW
Planted cattails at Millcreek greywater
Greywater, sometimes also spelled as graywater, grey water or gray water, is all of the effluent water from a household, such as water discharged from lavatories (bathroom sinks), bathtubs, showers, clothes washers, and laundry trays. Greywater is not wastewater from a sink used for food preparation, or water closet (toilet) wastewater.

The water leaving our homes carries nutrients and value. It may also contain pathogens, and/or harsh chemicals and care should be taken with it. However, it is not a great risk compared to blackwater (sewage).

Redirecting the water we use for tasks such as showering allows us to reclaim some of that value to grow plants and recharge the water table. It may be necessary to choose our soaps and detergents more carefully, if we use the greywater for watering and fertilizing plants.

Main portal: Water
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The Parras Summer Program, in Parras,W, Mexico is a summer immersion in Appropriate Technology, globalization and Spanish language and culture. See the Parras Invitation for more information.

Most of the Parras2005 group near Perote  
Most of the Parras2006 group near Perote  
Most of the Parras2007 group farming  
Most of the Parras2008 group near Perote  

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