Aproveitamento da água da chuva para fins não potáveis em edificações de ensino: estudo de caso em São Luiz Gonzaga – Rio Grande do Sul

Abstract

One of the most talked about topics today, due to its importance, is the rationing of water. For decades, it was thought that water was an infinite good, which resulted in very serious environmental problems, such as the scarcity of water resources in several locations. Thus, there alternative sources to supply uses which did not require potable water, such as the use of rainwater. This word aims to analyze the technical and economic viability of implementing the rainwater capture system at Gustavo Langsch – Polivalente high school, located in the municipality of São Luiz Gonzaga / RS. First, the data were collected to characterize the school, such as the cleaning area, gardening, the number of students, teachers, staff, number of meals served, for the calculation of the building demand. After there was a hydrological study, based on historical data, in order to characterize the rainfall regime and its intensity. It was determined the roof catchment areas, made the design of reservoirs, as well as setting the deployment location and finally, it was performed viability study on the implementation of the capture and storage system. All these steps were necessary to evaluate the potential of potable water, which resulted in around 70%. The costs for implementing the system were equivalent to R$ 82.335,91, and the analysis of technical and economic viability points a payback period of the investment of 7 years and 2 moths. Therefore, the present study found that the implementation of rainwater catchment system for non-potable purposes at Gustavo Langsch – Polivalente High School has shown economically viable, for showing a great potential of potable water (70%) and a relatively average return period.