1. Grey water flow and composition
Grey water (GW) is defined as domestic wastewater (DHW), excluding water containing urine and faeces, which is referred to as black water (BW). This definition therefore includes water from bathtubs, showers and washing machine effluent.
It should be noted, however, that in some publications, kitchen water is included in grey water.
The choice of a type of graywater recycling process, as well as its sizing, depend on three main factors:
flows and composition of the effluent to be treated;
the process application perimeter: in the case of in situ recycling, this zone may be that of the individual or collective dwelling, or even the neighborhood;
the application for which the recycled...
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Grey water flow and composition
Legislation on wastewater recycling
Bibliography
- (1) - AQUASTAT - Système d'information de l'Organisation des Nations Unies pour l'alimentation et l'agriculture accédé le 02/05/2010 http://www.fao.org/nr/water/aquastat/data/query/index.html .
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Standards and norms
Afnor (French standardization association)
- Sludge characterization – Determination of dry matter and water content - NF EN 12880 - 2000
- Wastewater treatment – Vocabulary - NF EN 1085 - 2007
International Organization for Standardization
- Water quality – Determination of suspended solids by glass fiber filtration - ISO 11923 - 1997
- Eau, qualité, essai des eaux, demande chimique...
Websites
WHO (World Health Organization)
WHO Guidelines for drinking-water quality http://www.who.int/water_sanitation_health , 3rd edition, 2006
Regulations
Law 2006-1772, law on water and aquatic environments – Journal officiel de la République française of December 31, 2006, corrigendum JORF of January 20, 2007 and law 2010-788 of July 12, 2010.
Arrêté du 21 août 2008 relatif à la récupération des eaux de pluie et à leur usage à l'intérieur et à l'extérieur des bâtiments, Journal officiel de la République française du 29 août 2008.
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