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Transfer Station Design

Transfer Station Design. Laura J. Weber President The Lydia Company Serving our clients to build a better tomorrow. What is the difference between these two containers?. Presentation Summary. Types of Transfer Stations Designing for the Needs of Your Community SRMT Example

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Transfer Station Design

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  1. Transfer Station Design Laura J. Weber President The Lydia Company Serving our clients to build a better tomorrow

  2. What is the difference between these two containers? The Lydia Company

  3. Presentation Summary • Types of Transfer Stations • Designing for the Needs of Your Community • SRMT Example • Economics of Transfer Station Design The Lydia Company

  4. Types of Transfer Stations • Many factors affect design • Tons/day to flow through • Waste storage • Processes to recover material or prepare (i.e. shred or bale) for shipment • Type of vehicles – collection & transfer The Lydia Company

  5. Types of Transfer Stations Con’t • 3 Sizes • Small – less than 100 tons/day • Medium – 100-500 tons/day • Large – more than 500 tons/day The Lydia Company

  6. Types of Transfer Station Con’t • Factors Impacting Size • Total tons/day of material to flow through • Size & capacity of collection vehicles using the facility • Length of time materials at the facility (storage space) • Loading & unloading times • Peak conditions; i.e. maximum # of vehicles in facility at once (design for this) • Type of processing to occur • Transfer trailer capacity & waiting time for loading • Hours of station operation The Lydia Company

  7. Types of Transfer Station Con’t • Direct-Discharge (Direct Dump) • Consist of drop off area where materials are placed directly in the collection container • Two design types: • Two operating floors – upper & lower • Materials are placed into hoppers on the upper level and fall into container on the lower level • Open-top containers • Materials are placed directly into containers The Lydia Company

  8. Transfer Station Types Con’t Examples of Direct-Discharge Stations The Lydia Company

  9. Types of Transfer Stations Con’t • Platform/Pit • Consist of an upper & lower level • Upper level is a tipping floor where materials are dumped • Lower level contains open-top trailers & materials are pushed into them from the upper level • Open top trailer can be either compacting or non-compacting The Lydia Company

  10. Types of Transfer Station Con’t Platform/Pit Designs The Lydia Company

  11. Types of Transfer Station Con’t Platform/Pit Designs The Lydia Company

  12. Transfer Station Types Con’t SRMT Transfer Station Combination of Direct Dump & Pit/Platform The Lydia Company

  13. Transfer Station Types Con’t • Advantages & Disadvantages of Types • There are many • The Decisions Maker’s Guide to Solid Waste Management provides a good list, Chapter 4 page 4-18 • http://www.epa.gov/epawaste/nonhaz/municipal/dmg2/chapter4.pdf The Lydia Company

  14. What Type Does Your Community Need? • Determining what type of transfer station you need is dependent upon many factors • First, define the problem that the transfer station will solve The Lydia Company

  15. Determining Type Needed Con’t • Ask these questions • What are the community needs & desires? • What types & quantities of materials will you collect? Will process (i.e. baling & shredding) any materials at your facility? • What is your service area? • Will you accept both residential & commercial wastes or just one or the other? • What are other local tip fees and can your facility be competitive? The Lydia Company

  16. Determining Type Needed • Questions Con’t • What will be your days & hours of operation? • What types of trucks & size will use your facility? What types of transfer vehicles will you use? • Do you really need a transfer station? • Experts agree that the disposal sites must be at least 10-15 miles from the facility before a transfer station is economically justified. The Lydia Company

  17. Determining Type Needed • Conducting feasibility & waste characterization studies are the best methods for gaining answers to the questions. • SRMT Example The Lydia Company

  18. SRMT Example • 1995 Feasibility Study • Door-to-door surveys were performed with both residents and businesses • Established that the community wanted a Tribally owned & operated solid waste system • People were using open burning & dumping because they didn’t like using non-reservation haulers The Lydia Company

  19. SRMT Example • Methods Used for Waste Characterization • Pounds/person/household • Volume-based waste audits • Survey questions in feasibility study • These methods estimated SRMT’s total waste generation rate = 10 tons/day • Current tons/day at transfer station = 12-15 tons/day • Transfer Station is designed for 25 tons/day The Lydia Company

  20. Economics of Transfer Station Design • Factors to consider when developing design costs • Engineering work • Personnel costs • Infrastructure costs, i.e. buildings, roads, property, site preparation work, construction, soil borings, etc. etc. • Full Cost Accounting (FCA) Method is best – will discuss more in session 7 The Lydia Company

  21. Laura J. Weber President The Lydia Company 315-212-0439 laura@thelydiacompany.com Connect With Me: www.facebook.com/TheLydiaCompany www.twitter.com/Laurajweber www.linkedin.com/in/laurajweber Questions? The Lydia Company

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