a good mix of green technologies in Brasil

hi friends.... few weeks ago I was jumping between different pages of facebook, web etc and by a common contact in Brasil I found this perfect image elaborated by Leilen Monti (on fb at leilen.monti) ....

... as you can image it regards to wastewater treatment... or in portuguese Tratamento de efluentes. 
This is part of a specific garden course on organic farming, permaculture, ets and as you can see they are developing the "Jardins Comestiveis" that means "Edible gardens" watered with rainwater or wastewaters.... 

Which plants they are using? obviously vetiver, banana etc...

follow them on fb at Jardins-Comestiveis