Estudo da viabilidade técnica e econômica da aplicação do aproveitamento da água pluvial em uma residência unifamiliar

Abstract

The implementation of a rainwater harvesting system is a project considered relatively simple considering its execution, and quite effective in terms of water capture and reserve. In view of that, it can be considered a very promising project in terms of sustainability, especially when it comes to water rationalization. As the lack of water is a global concern, there is an increase in public policies aimed at raising awareness and implementing sustainable practices. This study aimed to evaluate the technical and economic feasibility of rainwater harvesting, with reference to a single-family dwelling. The analysis was done for a residence with a catchment area of 80.61 m² and a non-potable water demand of 5.21 m³. The reservoir volume found was 6.33 m³, by the Practical English sizing Method. From the Project development and the budget for the system implementation it was concluded that the system is technically and financially feasible, having a Payback time of eighteen years and one month and a NPV (Net Present Value) for a 40-year lifespan of R$ 564.58.