ESTUDO DE UM SISTEMA DE CAPTAÇÃO DE ÁGUA DE CHUVA E REUSO DE ÁGUA CINZA PARA FINS NÃO POTÁVEIS PARA O COLÉGIO PADRE JÚLIO MARIA NO MUNICÍPIO DE BOA ESPERANÇA-MG

Abstract

The present work presents a case study, carried out in a private school in the municipality of Boa Esperança - MG, where it was analyzed the potential of saving of drinking water that could be obtained through the implantation of a system of utilization of rain water and Reuse of gray water for non-potable purposes. First, data were collected from the school population, flow measurements of the apparatus, analysis of water consumption bills and calculations of average annual volumes of rainwater discarded by the roof of the building. In addition, interviews were conducted with students, teachers and staff, checking the frequency and average time of use of the appliances, as well as a survey of the main activities that consume water. The percentage of drinking water that could be replaced by non-drinking water was verified, guaranteeing the saving of water resources, which resulted in approximately 80% of consumption. All of these steps performed in the work were of paramount importance in calculating the rainwater harvesting, reuse and mixed systems, when the two techniques were used together. Then, the volume of the lower reservoir of 20,000 liters was obtained for the collection of rainwater, 1,000 liters for reuse and 3,000 liters for the mixed system. Finally, a technical and economic analysis was made, presenting the costs of implementation, of materials and of labor. From there, it was verified that the use of the mixed system is the alternative that presents the greatest potential for saving treated water. Rainwater harvesting and reuse systems are sustainable solutions that help the rational use of water, contributing to the conservation of water resources for future generations.