ANALYSIS OF SOLID-WASTE SYSTEMS IN A RURAL SETTING, WITH DISCUSSION AND CLOSURE

THE U. S. FOREST SERVICE IS CURRENTLY UPGRADING THE SOLID- WASTE DISPOSAL METHODS USED IN ITS 153 NATIONAL FORESTS. THE TECHNIQUE CONSISTS OF COLLECTING REFUSE AT CAMPING AND PICNICKING AREAS BY USING TRUCKS. THE TRUCKS THEN HAUL THE SOLID WASTE TO CONVENIENTLY LOCATED SANITARY LANDFILLS WHERE IT IS COMPACTED AND BURIED. PRELIMINARY ANALYSIS OF THIS APPROACH IN A TEST FOREST SHOWED THAT COST SAVINGS OF AS MUCH AS A THIRD ARE POSSIBLE. TO MINIMIZE TOTAL COST, WE HAVE CONSTRUCTED A DETERMINISTIC CREW-SCHEDULING MODEL THAT CONSISTS OF A MIXED INTEGER LINEAR PROGRAMMING FORMULATION. AREAS TO BE SERVICED ARE INTRODUCED AS NODES IN A NETWORK, AND CONNECTIVE ROADS CONSTITUE THE NETWORK LINKS. THE NECESSITY FOR SERVICING ALL CAMP AREAS, THE LIMITED CAPACITY OF TRUCKS, AND THE LIMITED WORKING DAY OF CREWS SERVE AS A SET OF CONSTRAINTS. IN ADDITION, CREWS START AND END THEIR TOURS AT HEADQUARTERS. COSTS ARE ASSOCIATED WITH BOTH THE TOTAL NETWORK COVERAGE AND THE LANDFILL OPERATION. THE VARIABLES UNDER MANAGEMENT CONTROL, SUCH AS CREW SIZE, TRUCK CAPACITY, AND COLLECTION FREQUENCY, ARE TESTED PARAMETRICALLY; I.E., THE OPTIMUM SCHEDULE IS EVALUATED EACH TIME A PARAMETER IS CHANGED. THE PROCEDURE PERMITS AN INTEGRATED REGIONAL PLAN TO BE COMPARED WITH A COLLECTION OF SUBREGIONAL PLANS. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: References;
  • Pagination: pp 10-16
  • Monograph Title: Maintenance systems: estimating maintenance costs, solid-waste disposal systems, maintenance station locations, manager training, and equipment management
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00219002
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 30 1972 12:00AM