Análise do potencial de aproveitamento de águas pluviais e de aparelhos de ar-condicionado para usos não potáveis: estudo de caso na Escola Municipal Osmundo Faria

Abstract

Due to the problem of the water crisis on the world stage and due to the high consumption of potable water for non-potable activities, the adoption of sustainable alternative solutions that reduce this use is imminent. Therefore, as a contribution to this search, the present work brings the analysis of the technical and economic feasibility of the implementation of a system for the reuse of rainwater and condensation of air conditioners at the Municipal School Osmundo Faria,Parnamirim-RN. In this context, it was found that, for washing floors, gardening and technical fire reserve, the chosen sources become sufficient and adequate to the point of enabling the elaboration of a reuse project. This feat was possible due to the existence of about 2 thousand square meters of coverage area and the estimated use of 20 air conditioning units for the institution's classrooms, generating approximately 23 thousand liters per day , considering the daily operation of 8 hours and the other variables adopted in the calculations. In addition, a reserve system was designed to allow flow control depending on the uses, with reservoirs of 15 and 5 cubic meters. The study also included the formulation of a budget spreadsheet resulting in a cost of BRL 99,129.92 for the implementation of the project, including expenses with materials and labor. Thus, through the cost value to the detriment of the savings generated in the water and sewage charges made by the responsible concessionaire, it was possible to determine that the return on investment in less than nine years becomes economically viable. Therefore, it is proven that the present study reproduces itself as an important contribution in the preservation of the environment, as it allows the reduction of water consumption through using.