Sistema de aproveitamento de água de chuva para fins não potáveis: estudo de implantação em uma edificação residencial no município de São Paulo

Abstract

Water, being a natural and renewable resource until a long time ago was considered abundant and inexhaustible, nevertheless, nowadays it has become more scarce in order to limit the urban and industrial development generating deficiency in its supply to attend the high and growing demand, or by disordered population growth, pollution of water sources and economic crisis affecting infrastructure. This work aims to demonstrate a study of the implantation in a city of São Paulo of a rainwater harvesting system, making it possible to investigate through data that rational and alternative use is a way of considerably reducing scarcity, so to save potable water that is used for less noble purposes in homes, such as car wash, sidewalks, watering plants, indicating that a reasonable number of households with rainwater storage systems would consumption of the conventional public system and would enable the sustainable development of society, so this work obeys the general principle that water conservation should entail positive net benefits, this means that any conservation action or program is only feasible if, at the end of a balance between costs and benefits, are favorable results. In this way, the result found was a volume of 2.14m³, being more conservative to the detriment of the available space for system implantation and its final cost was obtained the value of R$ 7.150,00, thus, for this condition the system is not economically viable, since its amortization time is long, but from the environmental point of view, it is viable, since it contributes to the preservation of a finite and necessary resource.