A Mathematical Programming Model for Water Usage and Treatment Network Design.

Simultaneous optimization approach for integrated water-allocation and heat-exchange networks

“…In this work, these bounds are calculated sequentially. In particular, an optimal WAN is first synthesized by solving a NLP model (Huang et al, 1999) to minimize the freshwater supply rate. The resulting objective value is used as the lower bound.…”

“…Although the water and energy management issues in every chemical process are always highly related, the design problems of water-allocation networks (WANs) and heat-exchange networks (HENs) have been considered separately in the past (Takama et al, 1980;Linnhoff and Hindmarsh, 1983;Yee and Grossmann, 1990;Wang and Smith, 1994a, b;Alva-Argaez et al, 1998;Huang et al, 1999;Karuppiah and Grossman, 2006). The former networks were synthesized with nonlinear programming (NLP) models, while the latter were designed with mixed integer nonlinear programs (MINLP).…”

A novel application of genetic algorithm for synthesizing optimal water reuse network with multiple objectives

“…Galan and Grossmann (1998) formulated a superstructure model for WWTN and solved it using a MINLP. Huang et al (1999) proposed a NLP formulation to optimize the superstructure of TWN with the objective of minimizing the freshwater usage and wastewater treatment capacity. While optimization approaches do not readily provide the same insights as the graphical pinch analysis, they serve as a good tool for synthesis, especially for complex networks and multiple contaminants.…”

Technical measures to achieve a cleaner production mode for recycled paper mills

“…Huang and his coworkers presented a mathematical programming solution of the combined problem of water allocation and treatment by formulating and solving a nonlinear program (NLP). The mathematical programming methods are effective in optimizing largescale systems [7]. In 1996, Tripathi applied pinch technology in a paper mill and showed that pinch technology was effective for minimizing the wastewater in a pulp and paper mill.…”