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The objective of this work was to evaluate the action of three species of aquatic plants called Eichhornia crassipes, Pistia stratiotes and Salvinia auriculata in the removal of available N and P fractions from the effluent of a domestic sewage treatment system in the district of Montalvão, in Presidente Prudente/SP. The treatments were characterized in: (T1) = effluent without the presence of plants; (T2) = effluent with Eichhornia crassipes; (T3) = effluent with Pistia stratiotes; (T4) = effluent with Salvinia auriculata, following the completely randomized design, with four treatments, in subdivided plots, with five replications. The available NH4 , NO3 and P concentrations of the effluent and their contents in the plant tissue (roots, bulbs and leaves) were analyzed. There was removal of NH4 + and P by aquatic plants in relation to the control treatment; the NH4 + removal rates of the effluent were differentiated between the species and between the monthly evaluation cycles; the Eichhornia crassipes presented greater efficiency in the removal of P from the effluent during all the monthly evaluation cycles; Salvinia auriculata presented higher levels of NH4 + and P in the tissue (roots, bulbs and leaves).

REMOÇÃO DE N E P DE EFLUENTE DOMÉSTICO POR PLANTAS AQUÁTICAS FLUTUANTES