Aproveitamento de água pluvial para uso não potável utilizando carneiro hidráulico : estudo de caso em residência de alto padrão

Abstract

The Brazilian territory presents the largest share of freshwater in the world, however, with population growth comes the need for new sources of high cost extraction, to meet the required demand. Furthermore, the Northeast region is characterized by a low amount of water resources, resulting in a territory with great water scarcity. Given this fact, the use of alternative sources for non-potable water use can help in water sustainability as well as in saving costs resulting from its consumption. To do so, the feasibility of implementing a rainwater harvesting system in a high-end residence located in AracajuSE was studied, using a hydraulic ram pump, aiming to meet the demand for the sanitary basins and green areas of the house. Thus, using the pluviometric data of the city and information related to water consumption in the residence, it was possible to size the elements present in the rainwater collection system, such as reservoirs and receptors such as gutters and horizontal and vertical conductors. To obtain the reservoir volume, some of the methods present in NBR 15527 were used, such as the Rippl, Brazilian Practical and English Practical methods, as well as using NETUNO 4 software. The final volume adopted for the reservoir was 0.5 m³, found through NETUNO 4, considering that the program has more complete input data for volume determination. The application of the system became unfeasible due to the obtained return time of 12 (twelve) years, resulting from the need to build a platform for the reservoir, necessary to meet the requirements of the hydraulic ram pump. Given this, the adoption of the hydraulic ram has been shown to be unfeasible for the residence under study, considering the lack of a topographical gradient in the terrain.