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sys1=[[Single Pit System |1]]|

sys2=[[Blackwater Treatment System with Infiltration|5]]|

|spanish_link=Humedal_Artificial_de_Flujo_Superficial_Libre

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[[Image:Icon_free-water_surface_constructed_wetland.png |right|95px]]

'''A Free-Water Surface Constructed Wetland is a series of flooded channels that aims to replicate the naturally occurring processes of a natural wetland,marsh or swamp. As water slowly flows through the wetland, particles settle, pathogens are destroyed, and organisms and plants utilize the nutrients.'''