Simultaneous synthesis of waste interception and material reuse networks: Problem reformulation for global optimization

A superstructure optimization approach for water network synthesis with membrane separation-based regenerators

“…We consider a generic superstructure representation as shown in Figure 2 for an industrial water network based on El-Halwagi and Gabriel (2005) and Meyer and Floudas (2006). The superstructure admits a fixed network topology consisting of predetermined numbers of fixed-flowrate sources for water reuse/recycle, regeneration units for contaminants removal from water streams, and fixed-flowrate sinks for acceptance of water for reuse/recycle.…”

“…Based on the superstructure and the proposed regenerator models, an MINLP is formulated by using model structures previously reported in the literature as a basis (Meyer and Floudas, 2006;Gabriel and El-Halwagi, 2005). The aim of the model is to determine the piping interconnections (or pipelines) of an optimal water system configuration with its associated total stream flowrates and contaminant concentrations.…”

“…The optimization-based approach mainly requires the construction of a superstructure network representation of design alternatives that leads to a mixed-integer linear/nonlinear program (MILP/MINLP). Optimization-based techniques for reuse/recycle and regeneration networks have also been developed by incorporating massintegration strategies (Gabriel and El-Halwagi, 2005;El-Halwagi et al, 1996) and propertyintegration framework (Napoles-Rivera et al, 2010;Ng et al, 2010;Ponce-Ortega et al, 2010;Ponce-Ortega et al, 2009). They have also been coupled with physical insights derived from water pinch analysis (Alva-Argáez et al, 1998;Alva-Argáez et al, 2007b;AlvaArgáez et al, 1999;Ng et al, 2009a;2009b;Ng et al, 2010;Ng et al, 2009c).…”

Synthesis of Heat-Integrated Resource Conservation Networks

“…Various mathematical optimisation works on synthesis of water network have been presented at later stage, which may be further categorised as direct reuse/recycle Savelski and Bagajewicz, 2000;Yang et al, 2000;Bagajewicz and Savelski, 2001;Gomez et al, 2001;Savelski and Bagajewicz, 2001;Savelski and Bagajewicz, 2003;Tan and Cruz, 2004;Karuppiah and Grossmann, 2006;Alva-Argáez et al, 2007) and regeneration systems (Gabriel and El-Halwagi, 2005;Karuppiah and Grossmann, 2006;Khor et al, 2011). Reviews on various techniques in water network synthesis problem can be found in literature Smith, 2005;El-Halwagi, 2006;Ježowski, 2010;Foo, 2012).…”

Synthesis of Material Interception Networks with P-Graph

“…The main advantage with mathematical optimization is that, the model may incorporate other considerations that are not readily handled with pinch analysis approaches, such as multiple-contaminant cases (Huang et al 1999), or forbidden recycle (Bagajewicz and Savelski 2001). Later works in this area considered the development of a linear model for global optimum solution (Gabriel and El-Halwagi 2005;Ng et al 2009a, b), detailed modeling for the various source interception units (Yang et al 2014;Mafukidze and Majozi 2016), and extension to property-based network (Ng et al 2009c). The main limitation to these mathematical optimization approaches is that, a single solution is normally reported, unless more constraints are added to the model.…”