• 9.- SANITATION - ( Semi- ) centralized treatment // 9.10. Horizontal sub-surface flow constructed wetland.

   **[<https://akvopedia.org/wiki/Horizontal_Subsurface_Flow_Constructed_Wetland>](<https://akvopedia.org/wiki/Horizontal_Subsurface_Flow_Constructed_Wetland>)**
  

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