Proposta de minimização no uso de águas utilizando o Diagrama de Fontes de Água : avaliação técnica e econômica em uma cervejaria

Abstract

It is well known that there is a growing world demand for water in the social, agricultural, commercial and industrial sectors. In particular, in the brewing industry, this raw material represents 93% of the raw material and acts as a major agent in cleaning the tanks and the industrial plant in general. In this context, there are tools to guide the management of consumable resources and reduce operational costs, especially Process Integration (PI) and its derivations, such as the Pinch and the Water Sources Diagram (DFA). Thus, the objective of the present work was to implement a routine of calculations of the DFA to a sergipano brewery project, in order to obtain scenarios to minimize water consumption through its reuse, for the technical-economic evaluation of the scenarios generated. The results show that the choice of the Mathcad Prime software to perform the calculations was adequate because of its accessibility and relatively simple interface for the creation of several scenarios (without and with reuse of internal currents). Using validated data, using data from the same industry, it was possible to apply it to COD (Chemical Oxygen Demand) data obtained from fermenters of the brewery under study. Thus, the best result was the reduction of 45.33% of water in the fermentation tank cleaning operation. In addition, a technical-economic evaluation was carried out for the scenarios generated, and suggestions were made for necessary equipment and adaptations, as well as the necessary investment analysis using the simple payback tool. However, it was concluded that the investment in the brewery of this study is not recommended, since the tanks are small and the frequency of the cleaning operations are low.