Potential Of The Small Aquatic Plans Azolla And Lemna For
Nitrogenous Compounds Removal From Wastewater
Author(s)
C. Forni, M.A. Nicolai & M.G.D'Egidio
Abstract
Potential of the small aquatic plants Azolla and
Lemna for nitrogenous compounds removal
from wastewater
C. Forni' , M.A. Nicolai', M.G. D'
* Biology Department, University of Rome "Tor Vergata ", Italy
^ Experimental Institute for Cereal Research, Italy
Abstract
The use of Azolla and Lemna in wastewater treatments has been suggested
because of various advantages, such as high growth rates. The present research
was carried out to analyse the performance of Azolla filiculoides Lam. and
Lemna minor L. for nitrogen removal from growth media containing high
amounts of different nitrogenous compounds. Two weeks experiments were
undertaken outdoor. Control plants were grown in N-free Hoagland medium
(Azolld) and in the same medium added with 200 ppm of KNOs (Lemnd),
whereas the treated plants were grown in Hoagland medium containing 600 ppm
respectively ofKNOg, or NH^Cl or NHjNOs.
Both species had similar growth rates in all media, but in ammonia medium it
was lower than in the other
Keywords
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