2. 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

3. 2 Motivation  Rising water costs  Limited water supplies  Waste minimization  Pollution control issues

4. 3 Goals  More efficient water use  Water reuse  Conservation

5. 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

6. 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

7. 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)

8. 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.

9. 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

10. 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

11. 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