Desempenho de filtros constituídos por fibra de coco no tratamento de águas residuárias de suinocultura

Abstract

This study was done to evaluate the performance of coconut fiber based organic filter in the primary treatment of swine wastewater (SWW). For each 100 L of SWW filtered, following parameters were determined in effluent: electrical conductivity and pH, concentration of total solids (TS), dissolved, suspended, fixed, and volatile solids, total nitrogen, phosphorus, potassium and sodium. The pH of the effluent during the first 100 L decreased, but then remained neutral until the end. The filter removed 30% nitrogen and about 70% phosphorous, but removal of sodium and potassium was inefficient, and in general their concentration increased. Of the physical parameters, 75% of TS, 40 to 60% suspended and volatile solids, about 40% total fixed solids were removed by the filter. The removal of dissolved solids was inefficient, but the SWW had lower salinity and about 20% lower electrical conductivity.