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Study on Impacts of Multiple Centralised Water Reuse Header from Consumer and Operator Perspectives

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
ARTICLE IN PRESS (volume, issue and page numbers will be assigned later)
DOI: http://dx.doi.org/10.13044/j.sdewes.d7.0299
Ahmad Fikri Ahmad Fadzil1, Sharifah Rafidah Wan Alwi1 , Zainuddin Abdul Manan1, Jiří Jaromír Klemeš2
1 Process Systems Engineering Centre (PROSPECT), Research Institute of Sustainable Environment, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Malaysia
2 Sustainable Process Integration Laboratory – SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology - VUT BRNO, Technická 2896/2, 616 69 Brno, Czech Republic

Abstract

Total Site Centralised Water Integration is an innovative system of reusing water among industries at an industrial site through the use of a Centralised Water Reuse Header. This allows industries along the Centralised Water Reuse Header to exchange water while the systems are managed and operated by a third-party. However, the suitable number of Centralised Water Reuse Header and the optimum range concentration are key factors yet to be considered. This paper presents a methodology to determine the optimum number as well as the optimum range of Centralised Water Reuse Header concentration.  The approach is illustrated using a case study to demonstrate how different numbers of Centralised Water Reuse Header affects both the total savings enjoyed by consumers and the payback period for the operator’s investment for the system. Results of the study show that two units of Centralised Water Reuse Header offer operator of the system a payback period of 3.5 y with consumer benefitting a 50.9 % of total cost savings on freshwater (76.8 % reduction) and wastewater (89.6 % reduction).

Keywords: Process Integration, Pinch Analysis, Water minimisation, Total Site centralised Water Integration, Interplant Water Integration, Centralised water reuse header.

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