, 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
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.
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.
- Project Formulation
- Problem Analysis and Literature Review
- Search for Alternative Solutions
- Decision Process
- 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.