A superstructure optimization approach for membrane separation-based water regeneration network synthesis with detailed nonlinear mechanistic reverse osmosis model

Khor, C.S. and Foo, D.C.Y. and El-Halwagi, M.M. and Tan, R.R. and Shah, N. (2011) A superstructure optimization approach for membrane separation-based water regeneration network synthesis with detailed nonlinear mechanistic reverse osmosis model. Industrial and Engineering Chemistry Research, 50 (23). pp. 13444-13456. ISSN 08885885

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Abstract

Scarcity of freshwater resources and increasingly stringent environmental regulations on industrial effluents have motivated the process industry to identify and develop various water recovery strategies. This work proposes the use of detailed model representation for water regeneration network synthesis, in which nonlinear mechanistic models of the regeneration units are embedded within an overall mixed-integer nonlinear programming (MINLP) optimization framework. The superstructure-based MINLP framework involves both continuous variables for water flow rates and contaminant concentrations and 0-1 variables for selection of piping interconnections. The nonlinear regeneration model produces a rigorous cost-based relation, instead of a "black box" model, that is incorporated within the overall MINLP representing a network of numerous water sources and water sinks. Hence, such an approach enables a simultaneous evaluation of both direct water reuse/recycle and regeneration-reuse/recycle opportunities. To demonstrate the proposed approach, an industrial case study is illustrated that incorporates a mechanistic model of reverse osmosis network (RON) for water regeneration for an operating refinery in Malaysia. The results indicate a potential of 58 savings in freshwater use. The capital investment for the water regeneration network is reported as 8,960,000 with a payback period of 2.1 years, thus providing economic support to pursue the RON retrofit option. © 2011 American Chemical Society.

Item Type: Article
Additional Information: cited By 58
Uncontrolled Keywords: Black boxes; Capital investment; Contaminant concentrations; Continuous variables; Detailed models; Economic supports; Fresh water resources; Industrial case study; Industrial effluent; Malaysia; Mechanistic models; Mixed-integer nonlinear programming; Network synthesis; Optimization framework; Payback periods; Process industries; Regeneration model; Superstructure optimization; Water flow rate; Water recovery; Water reuse; Water source, Environmental regulations; Industrial applications; Industry; Integer programming; Investments; Nonlinear programming; Optimization; Retrofitting; Reverse osmosis; Sewage, Effluents
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 09 Nov 2023 15:49
Last Modified: 09 Nov 2023 15:49
URI: https://khub.utp.edu.my/scholars/id/eprint/1464

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