Location Planning of Wastewater Treatment Plants for Reuse of Treated Water

The reuse of sewage-treated water can be one of the means of securing water resources in areas with poor water. Generally, wastewater treatment plants are built near the sea and rivers, but when considering reuse, such locations are not necessarily optimal in terms of cost. In this paper, with a view to the reuse of reclaimed water, a mathematical optimization model as a decision support is developed. Through a numerical analysis, we will clarify that the optimal location of the secondary and the advanced treatment plants is different from a conventional one.