OPTIMIZING THE SOLID WASTE COLLECTION SYSTEM OF ACSS USING

LINEAR PROGRAMMING & GIS

Mohammed Abdi Ali

Term Project

Fall 2000

CE 394 GIS for Water Resources

For additional information, visit http://www.ce.utexas.edu/stu/alima/home.html/swgis.htm

Topics of the Presentation:

• Introduction– ACSS– Model formulation for Solid Waste Collection Optimization– Use of GIS in solid waste management

• Objective of Term Project• Data Acquisition & Preparation• Analysis Using Arc View GIS Spatial Analyst• Analysis Using Arc View GIS Network Analyst• Conclusion• Acknowledgment

1. Introduction• ACSS

– ½ of the City’s population solid waste service provider

– Provides service for commercial & residential customer for both recyclable and disposable solid wastes.

– Provides both stationary container and hauled container services

– Offloading sites :TDS, BFI, MRF,Hornsby Bend, & COA Landfill

• Model of the optimization:

Input Data:Source locationTransportation street networksTransportation route length between pick-up locationsWaste generation data at pickup locationLocation of offloading sites

Analysis (optimization):Use linear modelingMinimize collection cost by considering the collection distance( route) and collection time Constraints: regulation, traffic loads, and working hours, truck capacity, and other conditions. Types of collection system

Output:Optimum collection routeCollection timeMinimum cost

• Use of GIS in solid waste management

2. Objective of the Term Project:

• Investigating the existing capacity of Arc View GIS tools for optimizing city’s solid waste collection system

• To use the existing Arc View tools for preliminary route optimization

3. Computer Data Acquisition & preparation• Customer locations• Austin City Street network• Offloading and Office locations• Identifying Commercial, residential and recyclable customers and

hauled container collection system services

Commercial Customer, Offloading & Office locations

4. Analysis Using Arc View Spatial Analyst• The proximity analysis tools

Procedures:

• Proximity to disposal sites – sample proximity analysis

5. Analysis Using Arc View GIS Network AnalystThe Closest facility to Hauled Container Collection System-Procedures:

Sample Best Route AnalysisProcedures:

Out of the Analysis

6. Conclusion

• The existing Spatial and Network analyst tools have limited application in City’s solid waste collection system optimization

• The existing tools are suitable for hauled container collection system than the stationary container system

• Improved tools or integration of additional linear models to include all the factors that may affect the collection system is necessary

• The existing tools may be helpful for locating transfer stations and landfill sites for new collection system

7. Acknowledgment

-City of Austin Solid Waste Service Office

THANKS TO GOD! DEC. 7

DEC. 7