Análise de viabilidade econômica do sistema de reúso de águas cinzas em condomínios residenciais horizontais

Abstract

Nowdays the demand's raise and the drinking water's lack of supply has increase the water problem in the world, quite reaching the residencial, coomercial and industrial demand. So the rational use of water became a smart strategy to increase water supply and reduce lack of water issues. Within the possibilities highlight the reuse of greywater. This study intended to analyze the water savings and financial economic viability Payback through the implementation of a system for reusing greywater in horizontal multi-family homes. Was selected a multifamily single floor 25 houses condominium, in the city of Fortaleza. For cost conditions of grids's fresh water and sewer disposal in this study, was found the return on investimenr period would be approximately 15 years, which was not considered satisfactory given that the useful life for this type of building is approximately 30 years. However, other important variables such as an increased security in mostly water rationing scenario, as well as environmental advantages, should also be considered in the decision making process. In addition, other scenarios driven by water and sewer rate adjustments could make the system more attractive from the economic point of view. Thus, the current values of prices practiced in the middle state that inhibit more sustainable practices of rational use of water