Water, Sewage & Effluent Mar Vol 30 No 2 | 页面 20

“Instead of constructing
a wetland, we float a
vetiver wetland on the
surface of the polishing
pond, where this grass
grows hydroponically.
Once the system is in, it
requires very few inputs
and it runs itself.”
Bacteria that live in the vetiver grass allow it to absorb high levels of nitrates and phosphates.