Desempenho de filtros constituídos por fibra de coco no tratamento de águas residuárias de suinocultura
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Engenharia na Agricultura
Abstract
Neste estudo, objetivou-se avaliar o desempenho de um filtro orgânico utilizando a fibra de coco como material filtrante no tratamento primário de águas residuárias da suinocultura (ARS). Para isso, a cada 100 L filtrados de ARS, foram, medidos no efluente dos filtros orgânicos a condutividade elétrica (CE) e o potencial hidrogeniônico (pH) e quantificadas as concentrações de sólidos totais (ST), dissolvidos (SDT), suspensos (SST), fixos (SFT) e voláteis (SVT), nitrogênio total (NT), fósforo total (PT), potássio (K) e sódio (Na). Observou-se que o efluente aparentes valores apresentou decréscimo no valor do pH nos primeiros 100 L de ARS filtrados; porém, a partir daí, passou a ficar próximo ao neutro. Verificou-se remoção de 30% do nitrogênio, em torno de 70% do fósforo e, no caso de sódio e potássio, além de não apresentar eficiência na remoção, contribuiu para o aumento na concentração efluente. Nos atributos físicos, a fibra de coco se mostrou eficiente na remoção de SS (75%), ST e SVT (40 a 60%) e SFT (em torno de 40%). O filtro de fibra de coco não proporcionou eficiente remoção de SDT, entretanto, houve decréscimo na salinidade da ARS, tendo sido observadas reduções em torno de 20% nos valores de CE.
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.
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.
