Simulação do comportamento de reatores em fluxo contínuo tratando efluentes de diferentes naturezas

Abstract

Brazil has a considerable deficit in regards of wastewater treatment, since according to IBGE (2017), only 57.6% of Brazilian municipalities have a water and sewage treatment system, on this perspective, anaerobic digestion presents itself as a solution, not only for treatment of waste from diferente sources, but also as means of indirect electricity generation, through biogas. Studies in regards of modeling treatment units are of extreme importance, in order to provide economy in time and resources through the use of the proper calibration of the obtained models. This study fundaments itself on the data obtained via the Magassy reator and Oliveira Netto (2017), that used a CAAFBR (Combined Anaerobic-Aerobic Fixed Bed Reactor), with recirculation on the liquid stage of the sewer waste, and also using the data provided by the Gois (2017) reactor, that utilized a AFBR (Anaerobic Fluid Bed Reactor) treating sugar cane vinasse based affluent, for the production of hydrogen and methane. The software utilized was Vensim PLE®, in order to simulate the behavior of organic matter, in continuous reactors, treating effluents of different natures, using kinetic parameters extracted with the aid of equations of ideal flow models and laboratory scale operation data. To verify the similarity between the simulated data and those obtained in the laboratory, the statistical measurement of the Pearson correlation coefficient (ρ) was used. In the simulations performed, the best correlation was ρ=1, while the weakest result was ρ=0.199. The satisfactory results demonstrates that the simulation can be used in processes of degradation of organic matter in the operational conditions (flow regime and substrate used) of the evaluated studies.