Avaliação da Eficiência de Um Sistema de Tratamento por Wetland Construído Aplicado ao Efluente de um Frigorífico de Suínos

Abstract

This paper presents the results obtained with a treatment system by constructed wetland, when applied to effluent from a swine slaughterhouse. The experimental module was filled with a soil layer, followed by crushed stone and sand as filtering material and the upper layer was planted macrophyte Juncus effusus. A level controller and a pump provided the effluent recirculation in experimental module. This experiment was conducted for a hydraulic retention time of 96 hours, in addition, samples were collected every 24 hours for subsequent physical-chemical analyzes. The results were promising, was obtained 98.4 % removal of COD – Chemical Oxygen Demand after 96 hours of treatment. Moreover, there was also a decrease in the electrical conductivity of the effluent, possibly due to nutrient consumption by the plants.