Avaliação da potencialidade no reúso doméstico da água cinza tratada para fins não potáveis

Abstract

Treatment and reuse of gray water (GW) has been studied as an alternative for non-potable uses. The objective of this study was to evaluate the potential for reuse of treated gray water (TGW) in a high standard residence in Feira de Santana – BA. The microbiological risk for TGW use was assessed via the methodology Quantitative Microbial Risk Assessment (QMRA); the potential for generating bad odors by means of pH, DO and ORP measurements; the color was measured directly; and the embodied energy using the methodology of Life Cicle Assessment LCA. The average microbiological risk of TWG was of the order of 10-5 DALY.pppa-1. The ACT also presented ow potential for generating bad odors. The measured color was on average 13.5HU, with a standard deviation of 10 uH. The system’s embodied energy found was 2.74 kWh/m³ of TGW produced, lower than the local concessionaire numbers. The gray water (GW) is found to have great potential for less noble reuse purposes