Um estudo para aproveitamento de água de chuva para fins não–potáveis no Pavilhão de Aulas 3 da UFRB

Abstract

Water is fundamental for socio-economic development and life support, in all its dimensions. The problem of water scarcity, combined with the misuse of drinking water, which reaches the final consumers, impels the search for alternatives for its solution, which makes the use of rainwater an important source capable of contributing to environmental gains by rational use of water, reduction of expenses with the sanitation companies, being able to guarantee the supply of points of consumption of non-potable water to homes, offices, factories, teaching facilities, among many others. The washing of sidewalks and floors, irrigation of gardens, flushing of toilets, washing of clothes and vehicles, are possibilities of using rain water, to minimize the waste of drinking water in installations in uses with low hygienic need. The present work verifies the feasibility of implementing a system for using rainwater in the Pavilion of Class 3 of UFRB, in Cruz das Almas-BA, in order to meet the demands of discharges in sanitary basins and garden irrigation. By applying the Australian Practical Method, analyzing the usable rain, a reservoir volume equal to 80m3 was estimated. The financial benefit for UFRB would represent R$ 1.968,78/ month, or about R$23.625,36 per year, considering a volume of 80 m3 / month would be stopped, meaning one in the order of R$206.243,58, discounted energy and pump maintenance costs for 10 years in UFRB accounts. Through the Benefit / Cost Analysis, the results achieved attest to the economic viability of the project with a return on investment in 2 years and 3 months, demonstrating the non-need to purchase 800 m3 / year of drinking water.