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Waste Collection

Waste Collection . Lesson Objectives. Understand problems and concerns associated with MSW collection. Compare and contrast privately and publicly operated systems. Understand the types of collection systems Identify the benefits associated with the use of transfer stations

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Waste Collection

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  1. Waste Collection

  2. Lesson Objectives • Understand problems and concerns associated with MSW collection. • Compare and contrast privately and publicly operated systems. • Understand the types of collection systems • Identify the benefits associated with the use of transfer stations • Prepare an economic analysis of transfer stations • Understand the design issues associated with transfer stations

  3. Collection accounts for 50-70% of a SW budget!

  4. Types of Waste Collection Systems • Refuse Collection Systems • Commercial Waste Collection • Recyclable Material Collection

  5. Rear Loading Compactor

  6. Automatic Side Loading Compactor The above photo, excerpted from Integrated Solid Waste Management, 1999 by H. Lanier Hickman, Jr. is presented with permission of the publisher, Pickard & Anderson Companies, Inc. Reproduction of this photo in any other work is prohibited.

  7. Side Loader

  8. Front Loading Compactor

  9. Recycling Hauler The above photo, excerpted from Integrated Solid Waste Management, 1999 by H. Lanier Hickman, Jr. is presented with permission of the publisher, Pickard & Anderson Companies, Inc. Reproduction of this photo in any other work is prohibited.

  10. Collection Options • City-Run Collection • Non-Exclusive Franchise • Exclusive Franchises

  11. Labor • Labor intensive • Labor unskilled • High turn-over rates • Few prospects for mechanical replacement of manual labor • Injuries and poor working conditions • Limited career opportunities

  12. Customer Service • Frequency of service • Container and storage issues particularly for commercial and industrial • Location of pickup • Special wastes

  13. Management and Financing Issues • Low priority • Resistance to change and new technologies • Lack of quality management • Inflation • Changing with new regulations

  14. Technological Issues • Collection of recyclables, yard waste, special wastes • Yard waste containers - bagged material must be debagged prior to composting • Automated collection (still requires an operator) • Development of efficient routes • Vehicle weight restrictions • Vehicle turning radius and clearance

  15. Reasons for declining collection frequency include • Proportion of putrescible waste declined (food grinders) • Better design of collection vehicles controls odors and flies • Service costs increased • Time between collection and disposal decreased • Better management

  16. Fixed Factors • Fixed Factors • Climate • Topography • Layout - container access (alley, curbside, rear of house) • Available transportation systems, traffic, roads (Venice uses boats) • Types of wastes collected • Population density

  17. Variable Factors • Storage techniques employed • Recycling • Collection frequency • Crew size • Equipment

  18. Collection Calculations Y = a + b + c(d) + e + f + g Where: Y = total collection time a = garage to route time b = actual time collecting waste c = number of trips to disposal site d = time to drive fully loaded truck to disposal facility, unload and return to collection area e = time to drive to garage at the end of the trip f + g = off route time, usually a fraction of Y

  19. Collection Calculations Cont’d N = SF/XW Where: N = number of vehicles required S = total number of customers served per week F = collection frequency X = number of customers truck can serve per day W = number of work days per week

  20. Hauled Container System Number of Containers = n Example below: n=5 The number of drive between containers = n-1 Example: dbc = 4 1 2 3 4 5 Disposal Site

  21. Return to Home page

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