Targeting for total water network. 2. Waste treatment targeting and interactions with water system elements

Part 1 of this series of papers presented graphical and algebraic approaches that are used to identify waste streams in a total water network. In this part of the series, the interaction between waste treatment and water regeneration is explored. Appropriate selection of waste streams for regeneration or waste treatment will lead to the minimum impurity load to be processed in the regeneration and waste treatment units; hence, leads to the reduction of the network capital and operation costs. In addition, a novel wastewater composite curve for targeting the minimum impurity load removal is presented in this work. Targeting for the minimum treatment flow rate and the minimum number of treatment units is presented for the treatment system of the fixed outlet concentration and removal ratio type, respectively. Literature examples are solved to illustrate the proposed approaches.