This work aimed to evaluate the environmental sustainability of the treated sewage reuse on aquaculture by using the Environmental Sustainability Index of Aquaculture Reuse (ESI AR), Water Quality Index of Aquaculture Reuse (WQI AR) and environmental cost (entropy). For conventional aquaculture, a water quality deterioration of the fish tanks was observed by the environmental cost. When treated sewage was used in tanks without external aeration, it was not verified a remarkable water quality deterioration. However, for the tanks externally aerated and fed with treated sewage there was a water quality improvement, in other words a polishing step was taking place. All the systems analyzed showed to be environmentally sustainable, which indicates that the treated sewage can be considered a good water source for aquaculture.
water bodies management; sustainability index; water reuse; environmental sustainability
