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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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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?

The Lydia Company


Presentation Summary

  • Types of Transfer Stations

  • Designing for the Needs of Your Community

  • SRMT Example

  • Economics of Transfer Station Design

The Lydia Company


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


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


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


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


Transfer Station Types Con’t

Examples of Direct-Discharge Stations

The Lydia Company


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


Types of Transfer Station Con’t

Platform/Pit Designs

The Lydia Company


Types of Transfer Station Con’t

Platform/Pit Designs

The Lydia Company


Transfer Station Types Con’t

SRMT Transfer Station

Combination of Direct Dump & Pit/Platform

The Lydia Company


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


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


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


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


Determining Type Needed

  • Conducting feasibility & waste characterization studies are the best methods for gaining answers to the questions.

  • SRMT Example

The Lydia Company


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


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


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


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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