A holistic framework for design of cost-effective minimum water utilization network
Chemical Engineering Department, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. Journal of Environmental Management
(Impact Factor: 2.72).
08/2008; 88(2):219-52. DOI: 10.1016/j.jenvman.2007.02.011
Water pinch analysis (WPA) is a well-established tool for the design of a maximum water recovery (MWR) network. MWR, which is primarily concerned with water recovery and regeneration, only partly addresses water minimization problem. Strictly speaking, WPA can only lead to maximum water recovery targets as opposed to the minimum water targets as widely claimed by researchers over the years. The minimum water targets can be achieved when all water minimization options including elimination, reduction, reuse/recycling, outsourcing and regeneration have been holistically applied. Even though WPA has been well established for synthesis of MWR network, research towards holistic water minimization has lagged behind. This paper describes a new holistic framework for designing a cost-effective minimum water network (CEMWN) for industry and urban systems. The framework consists of five key steps, i.e. (1) Specify the limiting water data, (2) Determine MWR targets, (3) Screen process changes using water management hierarchy (WMH), (4) Apply Systematic Hierarchical Approach for Resilient Process Screening (SHARPS) strategy, and (5) Design water network. Three key contributions have emerged from this work. First is a hierarchical approach for systematic screening of process changes guided by the WMH. Second is a set of four new heuristics for implementing process changes that considers the interactions among process changes options as well as among equipment and the implications of applying each process change on utility targets. Third is the SHARPS cost-screening technique to customize process changes and ultimately generate a minimum water utilization network that is cost-effective and affordable. The CEMWN holistic framework has been successfully implemented on semiconductor and mosque case studies and yielded results within the designer payback period criterion.
Available from: Walter Den
- "One approach for water resource management in waterintensive industries is water network design, which includes design in both production and secondary use levels. Design of water network , by means of graphical methodologies (Alwi et al., 2008; Manan et al., 2006), mathematical programming (Feng et al., 2007) and synthesis of mass exchange networks (Shafiei et al., 2004), has been applied to allocate streams between operational units within the water system, due to the increased interests for sustainable development in industries (Boix et al., 2012). The purpose of water network design is to maximize water generation and reuse water into the industrial processes (El-Halwagi et al., 2003). "
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ABSTRACT: Multivariate statistical techniques of cluster analysis (CA) and discriminant analysis (DA) were applied in this study for the evaluation of water resource management strategies in high-tech industries, on the basis of the existing water use related data of 70 participating plants in Taiwan since 2011. The existing water use data were collected and transformed into detailed water balance charts, and the water use performance at individual plants was evaluated by three indices, namely the “processing water recovery rate”, the “plant water recovery rate”, and the “plant discharge rate”. Results from discriminant analysis showed that increase in the ratios of effluent recycled to pure water system (EPWR) and recycled to secondary water system (ESWR) had positive effects on achieving higher water use performance. On the other hand, process water consumption and ESWR were influential factors in discriminating samples with lower water use performance. The results also confirmed the finding from synergistic effect that improvement on both EPWR and ESWR contributed to the highest water use performance. Opportunities for water recycling in high-tech industries appears to be technically feasible, future efforts could usefully be undertaken to implement further investment on water-use efficiency and novel treatment techniques, and investigation on various reuse purposes.
Resources Conservation and Recycling 01/2015; 94:35-42. DOI:10.1016/j.resconrec.2014.11.007 · 2.56 Impact Factor
Available from: Zainatul Bahiyah Handani
- "On the other hand, the minimum water targets can only be achieved when all possible methods are employed to holistically reduce fresh water consumption through elimination, reduction, outsourcing and regeneration. A systematic water reductions technique through water management hierarchy (WMH) was introduced by Wan Alwi and Manan  to give new insight in process modification and its application was further demonstrated in Wan Alwi et al. . The process changes are systematically implemented in terms of priority through a clear guidance. "
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ABSTRACT: This work presents the development of a new systematic technique to target fresh water consumption and wastewater generation for systems involving multiple contaminants when all options of water minimization including source elimination, reduction, reuse/recycle, outsourcing and regeneration are considered simultaneously. This problem is formulated as mixed integer linear programming (MILP) and implemented in Generalized Algebraic Modeling System (GAMS). The consideration of process changes will lead to optimal design of minimum water utilization network. The MILP model proposed in this work can be used to simultaneously generate the minimum water targets and design the minimum water network for global water-using operations for buildings and industry. The approach is illustrated by using an industrial involving a chlor-alkali plant. Significant water savings for the industrial case study is achieved, illustrating the effectiveness of the proposed approach.
- "Correljé et al. (2007) present an overview of policy principles that play a role as basic assumptions in water management. Water resources management is discussed by many authors such as Zhang et al. (2008), Mitchell et al. (2003), Zhao and Chen (2008), Wilson et al. (1997), Maqsood et al. (2005), Ekinci and Konak (2009), Sherali and Smith (1997), Jacovkis et al. (1989) and Wan Alwia et al. (2008). These approaches focus on a specific part of the water cycle, being isolated from the total water system, in which a extensive range of actors and processes play a role, which are not addressed in these studies. "
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ABSTRACT: The European Water Framework Directive (EWFD) demands a detailed analysis to determine which changes and measures within the surface water system are required, which actors require detailed scrutiny, and which technology has to be developed in order to guarantee that the quality of the surface water is complying with this Directive.This paper will discuss a holistic model developed for the optimization of the surface water system for a water authority in The Netherlands, which is influenced by (i) waste water streams originating from e.g. households, industry, agricultural and transport activities among others and (ii) the end-of-pipe technology of waste water treatment plants, while interfacing with (iii) thermal treatment and minerals and metallurgical processing for the recovery of specific elements from waste water sludge and other residues created during waste water treatment.The paper develops a fundamental basis that can feed factual information such as optimal combination of measures (technology and policy) into sustainability frameworks or the implementation of the EWFD. This optimization is affected by quality constraints, costs, energy, environment and interactions between the various materials present in the different streams in the water system. By incorporating these parameters into the model a tool is provided that provides metrics to measure the ‘sustainability’ of the Web of Water (WoW), while linking to and harmonising with the Web of Materials/Metals (WoM).The WoW optimization model links material cycles from e.g. food, transport, agriculture and industry to the recovery of materials from the water cycle with the pyrometallurgical and thermal processing of minerals/materials, hence quantifying resource conservation and sustainability on the interface between aquatic and product manufacturing systems and the process industries.
Minerals Engineering 02/2010; 23(3-23):157-174. DOI:10.1016/j.mineng.2009.08.009 · 1.60 Impact Factor
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