Aproveitamento de água pluvial para fins não potáveis em moradia universitária

Abstract

The use of rainwater in buildings aims to enable the use of alternative sources of supply in activities that do not require drinking water for their execution. This alternative generates a decrease in the consumption of potable water, helps to reduce the volume of surface runoff of rainwater and is a measure of water conservation in the building. For the use of rainwater, a prior tudy of the precipitation conditions in the region, the consumption profile of users and the technical and economic feasibility of implementing the system is necessary, in order to guarantee an optimal volume of reserve. With the feasibility studies developed in this work, it was possible to perceive the economic and environmental benefits in the implantation of the system, bringing up important surveys about the final uses of water in the building, guidelines and measures to be analyzed for its implementation and debate on the importance of water conservation. The volume of the rainwater reservoir adopted in the work, through the use of the Neptune 4.0 software and considering an upper reservoir of 5,000 liters to meet the daily demand of the building, was 7,000 liters with a potable water saving potential of 26.52%. The economic analysis presents a Payback of 36 months, a net present value of R$ 41,955.72 and an internal rate of return of 3.48% per month for the analysis period of 20 years, data that represents the feasibility of implementing the rainwater harvesting system in the house.