Bi-level fuzzy optimization approach for water exchange in eco-industrial parks |
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| Authors: | Kathleen B Aviso Raymond R Tan Alvin B Culaba Jose B Cruz |
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| Institution: | 1. Industrial Engineering Department, De La Salle University, 2401 Taft Avenue, 1004 Manila, Philippines;2. Center for Engineering and Sustainable Development Research, De La Salle University, 2401 Taft Avenue, 1004 Manila, Philippines;3. Department of Electrical and Computer Engineering, The Ohio State University, 205 Dreese Lab, 2015 Neil Ave., Columbus, OH, 43210-1272, USA;1. Industrial Engineering Department, De La Salle University–Science and Technology Complex, Biñan, Laguna, Philippines;2. Chemical Engineering Department, De La Salle University, Manila, Philippines;3. Research Center for the Natural and Applied Sciences, University of Santo Tomas, Manila, Philippines;4. Center for Engineering and Sustainable Development Research, De La Salle University, Manila, Philippines;5. School of Economics, De La Salle University, Manila, Philippines;1. University of Waterloo, 200 University Avenue West, Waterloo, ON, Canada N2L3G1;2. The Petroleum Institute, Abu Dhabi, United Arab Emirates;1. Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore;2. Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2 L 3G1, Canada;1. Department of Chemical Engineering, Texas A&M University at Qatar, P.O Box 23874, Education City, Doha, Qatar;2. The Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX, USA |
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| Abstract: | In order to minimize the consumption of resources and the generation of waste, eco-industrial parks (EIPs) have been designed to encourage the establishment of waste exchange networks between the plants contained within them. Considering that the participating plants have their individual fuzzy cost goals and that the park authority has the objective of minimizing total freshwater consumption in the EIP, this problem may be formulated as a bi-level optimization problem, with the park authority as the upper-level decision-maker. A bi-level fuzzy optimization model is developed to explore the effect of charging fees for the purchase of freshwater and the treatment of wastewater in optimizing the water exchange network of plants in an EIP. The effect of subsidizing exchange of streams between plants is also included in the model. Results show that it is not necessary to impose exorbitant fees, nor to completely subsidize costs associated with recycling, in order to induce significant reduction of the consumption of freshwater in the EIP. |
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