Espécie de vereda na fitorremediação de efluente de uma central de processamento de alimentos vegetais

Abstract

The objective of this work was to evaluate the potential of the Eleocharis acutangula in the treatment of the wastewater of a central of vegetable foods processing through a laboratory scale wetland. Was analyzed the influence of the substrate and the species on the removal of COD, total solids, turbidity, nitrogen, phosphorus and pH stabilization. The experiment was set up in two glass boxes in a greenhouse and lasted for eleven months. The substrate used was river gravel and only one of the beds received E. acutangula. The bed with the macrophytes reduced 87.9% of phosphorus, 80.8% of nitrogen and 92.69% of COD in relation to the raw effluent. In relation to the control bed, the experimental bed reduced 54.5% of phosphorus, 33.0% of nitrogen and 81.4% of COD. According to the analyzed parameters, after the treatment in both beds the effluent became fit for final disposal, according to the standards of CONAMA Resolution N° 430/2011 and COPAM-CERH Joint Resolution N° 01/2008. Considering the reductions observed, the study showed that the species has potential in the treatment of wastewater.