Viabilidade técnica-econômica de um sistema de aproveitamento de água pluviais em uma unidade residencial multifamilar

Abstract

Considering that water is an indispensable resource for human life, questions on conservation and preservation of water resources are becoming more prominent today. The techniques of exploitation are shown as a sustainable solution contributing to the rational use of water, providing the conservation of water resources for future generations. This study has the objective of analyzing the technical and economic viability of a rainfall system in a multifamily residential unit located in Arapiraca – AL. First, the surveys were collected on residential water consumption data, such as the estimation of the use of toilets when used for liquid and solid waste, irrigation of the garden and washing of the condominium's yard. The values found were realized through in loco visits. Based on the data collected, an estimation of non-potable water consumption was carried out, where the reservoir volume was scaled using the Azevedo and Neto method and the Simulation method. Subsequently, all calculations were used for the design of the chute, using an NBR 10844 (1989), already for the estimation of the pluviometric intensity was made the method of Gumbel. Finally, an analysis of the economical viability of drinking water was carried out with the implementation of a system that was budgeted at R$ 14,841.82, which has a payback period longer than 30 years. So, with the accomplishment of this study, it was possible to verify that for this work the results were not satisfactory, possibly due to a small catchment area, along with a high demand and a high cost project. However, even if the result of this study was not what was expected, it is still important, as it contributes to new questions and further discussions on the subject, since water is indispensable to the life of living beings.