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Portal:Greywater

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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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Outside view of Pizza Box under CCAT's kitchen sink.
CCAT kitchen effluent particulate filter. The Campus Center for Appropriate Technology contracted our team, The ECO-PLUMBERS through Engineering 215 Intro to Design at Humboldt State University in order to design a filtration system that would remove the particulate matter from their kitchen sink and improve the functionality of CCAT’s greywater marsh. To accomplish this, Team ECO-PLUMBERS used the five phases of the design process shown in the article.
  1. Project Formulation
  2. Problem Analysis and Literature Review
  3. Search for Alternative Solutions
  4. Decision Process
  5. Specification of Final Solution

As a result of the design process Team ECO-PLUMBERS designed constructed and implemented The Pizza Box a sustainable filtration device that is safe and effective.

AEF greywater

Recreating a failing greywater marsh at the Arcata Educational Farm.

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Selected topics

Greywater
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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Things you can do

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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.
Sites

Appropriate technology · Built environment · Business · Construction and materials · Culture and community · Design · Energy · Energy storage · Engineering for Sustainable Development · Food and agriculture · Government supported development programs · Governments and sustainability · Green living · Greywater · Health and safety · Heat exchangers · Hybrid power systems · ICT and Education · Information technology · Learning · Medical Devices · Net Impact · Permaculture · Photovoltaics · Projects · Rainwater harvesting · Renewable energy · Service learning · Solar · Solar thermal · Sustainability · Sustainable business · Sustainable city living · Sustainable energy storage · Sustainable farm energy alternatives · Transport · Water Agricultural