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. Thesisby

Carolyn Eve NobelThe University of Texas at Austin

1998

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Motivation

Rising water costs Limited water supplies Waste minimization Pollution control issues

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Goals

More efficient water use Water reuse Conservation

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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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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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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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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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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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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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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