Viabilidade econômica e financeira para estratégias de conservação e reuso de água em edificação comercial de grande porte

Abstract

Since water scarcity is an arising problem in daily life, the adoption of technologies to produce water from alternative sources became an alternative. This article aims to assay the economic viability of the implementation of non-potable alternative sources in large commercial buildings. An investment evaluation was carried out in a deterministic manner and under risk conditions, with economic modeling of the water and sewage tariff. As results, all the scenarios studied were considered economically feasible. The evaluation under risk condition shows an underestimation of 8% of npv and irr when compared with the deterministic evaluation. The scenario more economically advantageous is the option that investment involving the three alternative sources of water with greater storage of water.