Adaptação de lodo sanitário e industrial ao tratamento do vinhoto.

Abstract

In this thesis the performance of UASB (up flow anaerobic sludge blanket) was evaluated for the treatment of vinasse after inoculation with different types of sludge. Sludge from a a reactor treating brewery was used combined with sludge from anaerobic sewage treatment. Four UASB reactors (R1, R2, R3 e R4) were operated during two phases of experimental work (I e II) with different operational conditions. In phase I industrial sludge was used as inoculum and the reactors were operated with upflow velocities in the range of of 0,4 to 2 m/h for a period of 101 days. At the end of the operating period the attained volumetric organic load was in the range of 12 to 18 kg/m3/dia. In phase II, the four reactors were reinoculated with mixtures sanitary sludge with different proportions of industrial sludge. Reactor R4, inoculated with only sanitary sludge was the reference reactor. During this phase the four reactors were operated with the same upflow velocity. The reactors were operated for 98 days, when a specific volumetric load in the range of 12 kg/m3/dia was attained. At the end of the two phases the sludge in the reactors were adapted to vinasse and had a specific methanogenic activity (SMA) of 0,2 a 0,8 gDQO.gSV"1.dia"1, with sedimentation properties ranging from good to excellent. Toxicity tests showed that the anaerobic sludge was sensitive to the biocides used at alcohol distilleries.