Viability of reutilization of water through previous treatment with aquatic macrophytes in irrigation waters

Resumo

Reuse of water is today an important resource to reduce the wasting of hydric resources, and conserve them. Experimental studies using aquatic macrophytes for previous treatment of the water, consisting of surveying the quality of water proceeding from the irrigation of the seedlings vivarium at V.C.P Florestal S.A., after the introduction of aquatic macrophytes, as to remove the nutrients, aiming at reutilization of the water in the acclimatization squares of the vivarium. The employed methodology was field survey, in which were researched the bibliography and related documents, visits to professionals, and field study that enclosed the choice of the species, collecting of Pistia stratiotes and Eichhornia crassipes, weighing for growth verification, monitoring the plants’ development, water collection for analysis and handling of aquatic macrophytes. There was a verified enhancement in the analyzed water’s quality after the introduction of plants in the infiltration lake through the reduction of concentration of parameters DBO, DQO, pH, Cadmium, Nickel and Iron. Some parameters could not be reduced, such as Boron, Copper, Manganese, Zinc and Lead, all of them coming from fertilization, due to the experiment conditions. However, these elements had greater concentrations in previous analysis, before the plants were introduced.