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A MODEL FOR INDUSTRIAL WATER REUSE: A GEOGRAPHIC INFORMATON SYSTEMS (GIS) APPROACH TO INDUSTRIAL ECOLOGY Presented by Berna Yenice-Ay, Ph.D. March 12, 2003 University of Southern California M.S. Thesis by Carolyn Eve Nobel The University of Texas at Austin 1998
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2 Motivation Rising water costs Limited water supplies Waste minimization Pollution control issues
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3 Goals More efficient water use Water reuse Conservation
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4 Reclamation: The treatment or processing of wastewater to make it reuseable Reuse: Beneficial use of treated wastewater Recycling: Capturing and recirculating the effluent within one water use or process Terms
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5 Categories and Specific Examples of Water Reuse Agricultural irrigation: Crop irrigation, commercial nurseries Landscape irrigation: Parks, school yards, freeway medians, golf courses, cemeteries, greenbelts, residential Industrial reuse: Cooling, boiler feed, process water, heavy construction Groundwater recharge: Groundwater replenishment, salt water intrusion, subsidence control Recreational and environmental reuse: Lakes and ponds, marsh enhancement, stream flow augmentation, fisheries, snowmaking Nonpotable urban reuse: Fire protecting, air conditioning, toilet flushing
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6 A MODEL FOR INDUSTRIAL WATER REUSE a material reuse model identifies cost-optimal reuse scenarios a linear programming model Geographic Information Systems (GIS) map-based framework (integrates database operations with computer-based mapping)
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7 What is GIS? GIS: An organized collection of computer hardware, software, geographic data, and personnel designed to efficiently capture, store, update, manipulate, analyze, and display all forms of geographically referenced information.
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8 Model Objectives: Minimize cost and maximize fresh water conservation Considers product purchase, treatment, and transportation costs Decision variables: Flow rates of water from sources to destinations Results are displayed on a map of the region along with accompanying data tables
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9 Case Study Bayport Industrial Complex in Pasadena, Texas Contains an industrial wastewater treatment plant, a municipal wastewater treatment plant, and over 20 manufacturing facilities
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10 Results The optimal network reduces the fresh water consumption by 82%. The cost savings is 19%. The water reuse model can be used for analyzing the use and reuse of other materials Provides a quantitative tool to promote more efficient and sustainable system-based material cycles
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