Water scarcity is among the main problems to be faced by society in the 21st century. Water use has been growing at more than twice the rate of population increase in the last century. Although there is no global water scarcity as such, an increasing number of regions are chronically short of water.
Water conservation is the hydrological answer to scarcity problem and certainly water reuse is an important component of water conservation strategies. Several projects have demonstrated the benefits of water reuse and thus, it has been recognised as unique opportunity to be considered as a sustainable practice within a framework of integrated water management. Reuse provides two important benefits: the provision of an alternative water resource and the reduction of environmental impacts by reducing/eliminating wastewater disposal, which results in the preservation of water quality downstream.