Constructed Wetlands: A promising wastewater treatment system for small localities
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rapport Jan 2008 ; 60 pages
Aut. Martin Gauss
Ed. WSP - Washington
Téléchargeable sous format: PdF
(1 640 ko)
Téléchargeable chez l'éditeur
Abstract:
This report provides an overview of how constructed wetlands serve as natural wastewater treatment systems. It focuses especially on the subsurface horizontal flow type-a technology that has high potential for small and medium-size communities because of its simplicity, performance reliability, and low operation and maintenance requirements. The ability of this wetland to reduce pathogens renders the effluent suitable for irrigation of certain crop species if additional health and environmental protection measures are taken. This report describes several experiences with constructed wetland schemes in Central and South America: a full-scale pilot plant in Nicaragua, a community-managed constructed wetland scheme in El Salvador, and other systems in Colombia, Brazil, and Peru. Although the report focuses on technology issues, it stresses the importance of adequate arrangements for operation and maintains to guarantee the long-term treatment performance of the constructed wetland scheme. Furthermore, community participation and complementary actions such as promoting hygiene are crucial elements for sustainable wastewater treatment projects and maximization of health and environmental benefits.
Mots clefs: |
assainissement (CI) (DT) (OP) , boues (traitement des ) (CI) (DT) (OP) , eaux usées (traitement des ) (CI) (DT) (OP) , technologies à faible coût (CI) (DT) (OP) , zone humide, marais (CI) (DT) (OP) |
Editeur/Diffuseur: |
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WSP
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Water and Sanitation Program - Washington - Etats Unis |
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