Simulação do comportamento de reatores descontínuos tratando efluentes de diferentes naturezas

Abstract

Facing the problem of wastewater treatment, Brazil presents an imposing deficiency in the sanitary sewage issue. However, in an attempt to solve this problem, further studies related to sanitary sewage systems with physical and computational technological resources have become necessary, having as an essential complement the modeling of treatment units, focusing on the analysis of the behavior of reactors in operation. In the batch reactor the reactants are placed in contact in the tank and left, under agitation, for the reaction to take place. Industrially, the batch reactor is used for small production and in the laboratory it is the ideal reactor for studies of reaction kinetics. In the case of wastewater treatment by biological processes, the batch reactor has been intensively studied in recent years due to several advantages, such as easy sanitation for new productions, versatility and cost-effectiveness when compared to continuous reactors. The present study was based on experiments of two works treating distinct effluents, with a brief comparative analysis between them, by plotting graphs of the real data and those obtained via simulation through the Vensim PLE® software. The results obtained were satisfactory in both batch reactors, since the first analyzed was that of Silva (2020), which in comparison with simulated data from Vensim PLE®, found organic matter removal efficiency, respectively, around 60 and 53%, and Pearson's correlation (ρ) of 0.894; and the second analyzed was that of Silva (2019), with efficiency on average of 62 and 56%, and similarity of 0.754. Such similarity shows that this tool can have great applicability when it comes to computational simulation technique, for biological reactors under similar conditions, having as advantages the saving of time and resources.