Here I post another good publication by World Bank about treatment wetland in South America. This is made under the Water and Sanitation Program in Latin American and Caribbean Region by the Regional Office for Latin America of the World Bank Office.
Here the direct link to the .pdf version: http://www.wsp.org/wsp/sites/wsp.org/files/publications/ConstructedWetlands.pdf
The book report experiences and treatment performances of TW in Latin America. Here below some photos copied by the book.