Viabilidade de um sistema de aproveitamento de água pluvial para fins não potáveis em instituição de ensino: estudo de caso em Campo Mourão – PR

Abstract

Due to the constant growth of the population, the demand for water resources and the xaggerated uses of water by a large part of the population, the present study studies the feasibility of the implantation of a rainwater harvesting system in a teaching institution in the city of Campo Mourão -PR, exposing an affordable, financially viable and influential solution for the population. In order to design of the system and its viability analysis, the case study takes into account the rainfall of the Campo Mourão region, a roof area of 2,280 m² of rainwater abstraction, characteristics of existing sanitary appliances, frequencies and estimated time of use by students and teachers, a monthly demand of 115,615 m³ of rainwater calculated by the results presented in the surveys and market values for the budget of materials and labor in the region of Campo Mourão - PR, in addition to the estimate of an operating cost. The work presented the system as a solution with immediate positive environmental return, better managing water use and reducing waste of drinking water in 56.39%, with estimated total cost of R$ 31,570.06 and financial return in the medium term , estimated at 1 year and 10 months, generating a monthly financial saving for the institution of R$ 1,632.66 due to the reduction of treated water consumption.