Avaliação de desempenho de reator combinado anaeróbio-aeróbio no tratamento de água residuária proveniente de abatedouro de aves

Abstract

In the current national economy poultry farming is one of the most developed productive chains, it generates employment and has economic value and social importance. However, because of the large amount of wastewater discharge on rivers from the concentration of farming in a small, the rivers can’t dilute the effluent compounds, causing pollution of soil, air and water. One way to treat wastewater from poultry farming is to use the combined anaerobic-aerobic reactor of fixed bed (RCAALF), and polyurethane matrices under a rigid structure polypropylene as support material for immobilization of the biomass, the reactor was operated on bench scale with a useful volume of 5,2L, Hydraulic Retention Time (HRT) OF 22Hh and with recirculation of 150%. The results of the RCAALF during the operation period indicate high efficiencies for the removal of the organic matter in terms of ST,SST, raw COD and filtered COD at an efficiency of 93%, 97%, 98%, 98%, respectively. The removal of the nitrogen compounds in terms of NTK and N-amon was of 89% and 76%, with a denitrification efficiency around 99%, but the removal of the phosphorous was low, with an efficiency around 7%. The mathematical model of kinetic behavior of organic and nitrogen matter degradation from RCAALF that best fit was zero order, which showed values equal of r² 0,969 and 0,998, respectively.