Tratamento conjugado anaeróbio e aeróbio de lixiviado de aterro sanitário e esgoto doméstico

Abstract

In this work, the treatment process conjugate landfill leachate more domestic sewage in UASB reactor and percolator biological filter, applying volumetric organic load of 2.0 kgCOD/m 3 .dia and HRT of 18 hours. The experimental system was installed and monitored the physical premises of Experimental Biological Treatment of Sewage Station (EXTRABES) of the State University of Paraíba, Campina Grande - PB, Brazil. The substrate used to power the reactors was prepared daily and consisted of domestic sewage mixture over landfill leachate in proportions that could provide the substrate formation with total COD average concentration of 1500 mg.L . The system had total COD removal of 57% and filtered COD 44%. Still showed satisfactory removal of N-NH 4 + and efficient nitrification process, producing effluent with an average concentration of 38 mg.L -1 nitrate. The treatment system effluent produced high concentrations of carbonaceous material requiring a post-treatment. For the parameters of pH and N-NH 4 + average values of effluents are within the standards set by CONAMA 430/2011 for disposal in water bodies.