Desempenho de reatores anaeróbios de fluxo ascendente com manta de lodo em dois estágios tratando águas residuárias de suinocultura.

Abstract

The objective of this work was to evaluate the acting of two upflow anaerobic sludge blanket reactors (UASB) in pilot scale with volumes of 908 L and 188 L, installed in series, fed with swine wastewater with medium concentrations of total suspended solids (TSS) ranging of 2216 mg L-1 to 7131 mg L-1 and submitted to hydraulic detention times (HDT) of 62.3 and 31.1 h, in the first reactor, and of 12.9 and 6.5 h, in the second reactor. The removal efficienty of CDOtotal ranging from 74.0% to 89.6% in the Reactor 1 and of 34.3% to 45.1% in the Reactor 2, resulting in average values from 86.6% to 93.1% the treatment system in two stage with organic volumetric load (OVL) ranging from 3.40 to 14.44 kg CODtotal m-3 reactor d-1 in the Reactor 1. For the removal of TSS efficiency they varied from 85.6 to 87.8% to the system of two stages treatment anaerobic.