Constructed wetlands summary code innovation - feb 2013
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Transcript of Constructed wetlands summary code innovation - feb 2013
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Wetlands
Image courtesy of Wetlands International
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What is a wetland?
Image courtesy of Alaska Wetland Coalition
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Constructed Wetlands • Replicates the naturally occurring processes of a
natural wetland, marsh or swamp
• Water slowly flows through the wetland, particles settle, pathogens are destroyed, and organisms and plants utilize the nutrients
Image courtesy of Morel A., Diener S. 2006.
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Image courtesy of Yayasan IDEP Foundation and Wastewater Gardens
How Does it Work?
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Benefits: Pathogen and Pollutant Removal
Image courtesy of UN-HABITAT
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Types of Constructed Wetlands
Image courtesy of GIZ Sustainable Sanitation Ecosan
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Surface Flow Constructed Wetland
Image Courtesy of Natural Systems International
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Subsurface Flow Constructed Wetland
Image Courtesy of Natural Systems International
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Horizontal Flow Constructed Wetland
Image courtesy of Hoffman
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Reed Beds
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Vertical Flow Constructed Wetland
Image courtesy of Hoffman
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Hybrid Constructed Wetland
Image courtesy of SSWM
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French System
Images courtesy of EcoSan Club
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Plants
Image courtesy of Leelanau Conservation District.
Image courtesy of Vetiver.org
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Kathmandu, Nepal
Vertical flow constructed wetland treats 500 litres of water a day
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Household Wetland in India
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A Hybrid Wetland for Small Community Wastewater Treatment
in Morocco
Image courtesy of EcoSan Club
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Primary: Vertical Flow Constructed Wetland
Images courtesy of EcoSan Club
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Secondary: Horizontal Constructed Wetland
Images courtesy of EcoSan Club
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Tertiary: Vertical Flow Sand Filter
Images courtesy of EcoSan Club
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Biogas and Wetland System: Sano Khokana, Nepal
Images courtesy of Prakash Chandra Amatya
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Image courtesy of Prakash Chandra Amatya
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Constructed Wetlands in Pakistan
Image courtesy of AlertNet
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Additional slides
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Image courtesy of Hoffman
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Construction/Requirements