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The Greywater Portal

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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Gathering cattails at Freshwater Farms
Millcreek greywater. With most American homes today, all used waters are flushed down the toilet and go on to the water treatment plant. Unfortunately, only some of those waters deserve such intensive treatment. Greywater is a small scale alternative, in which "greywater" from some parts of the used water supply is kept separate, kept onsite and introduced into a working biotic environment, which will break down this water into a safe, (though non-potable) reusable level. This "biotic" treatment is carried out by freshwater marsh plants, Cattails (Typha Spp.) and Rushes (Scirpus Spp.) ours uses Cattails native to this area, Thypha Spp. wild crafted with expressed permission from Fresh Water Farms. It is important to note that greywater does not include any fecal material. Fecal content renders a water to become blackwater.

This Engineering project is creating a residential greywater processor for a house of three persons. In so doing, our goal has been to become educated on the greywater construction process, analyze the pros and cons of previous greywater projects and implement a functional, economically viable greywater processor.

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AEF greywater · Emergent plants for constructed wetlands  · Greywater Ecuador La lagrima purificadora · Millcreek greywater · Occidental greywater · Samoa Hostel Greywater Island · Samoa Hostel Truth Tank · Subsurface flow constructed wetland for greywater
CCAT greywater
greywater grease trap · greywater marsh · greywater marsh problems · kitchen effluent particulate filter · Wash n Flush
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External resources

Interwiki links
  • Akvopedia - focused on water technologies.
  • WaterWiki.net - a UN sponsored wiki - most of the content indexes the work of UN agencies.

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