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Anchorage Regional Landfill Landfill Gas-to-Energy Project

Anchorage Regional Landfill Landfill Gas-to-Energy Project. Renewable Energy Alaska Project Forum January 11, 2012. Project Organization. Design, build, operates project facilities Own Power Plant and electrical infrastructure. Owns, operates landfill and LFG Collection system

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Anchorage Regional Landfill Landfill Gas-to-Energy Project

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  1. Anchorage Regional LandfillLandfill Gas-to-EnergyProject Renewable Energy Alaska Project Forum January 11, 2012

  2. Project Organization Design, build, operates project facilities Own Power Plant and electrical infrastructure Owns, operates landfill and LFG Collection system Owns LFG Processing and transmission facilities Grant Contributor Power Customer

  3. Anchorage Regional Landfill • 300,000 tons annually • 8 million tons in-place • 22 million ton total capacity • Expected life – 2050

  4. Landfill Gas Generation Organic Materials In Waste Stream Anaerobic Decomposition Moisture Heat Landfill Gas (CH4, CO2 + trace organics)

  5. Gas Characteristics • Typically Makeup - 50% Methane, 50% CO2 • Typical energy content – 500 BTU/ft3 • Typical moisture content – saturated • May contain other constituents (Oxygen, Nitrogen, VOCs, siloxanes, H2S, etc.)

  6. LFG Generation General industry rules of thumb: • Each million tons of waste in place has the potential to generate 200-700 cf/min of LFG. • Each ton of waste in place has potential to generate 3,900 – 6,600 cf of LFG over the life of the landfill.

  7. Expected LFG Generation Current LFG Production 2007 ~ 1,000 cfm/ 30 MBtu/hr 2045 ~ 2,200 cfm/ 66MBtu/hr 2017 ~ 1,500 cfm/ 45 MBtu/hr Estimated Landfill Life EPA LMOP Generation Model

  8. Proposed Project Layout Gas Processing Facility Existing Gas Collection System Existing Blower/Flare Site Processed Gas Pipeline Proposed Power Plant

  9. Gas Collection System (GCS) Gas Collection System Purpose:Landfill emission control; collects LFG to central facility Components:Wells, piping, blowers, flare (constructed by SWS in 2006 with future expansions as needed) Ownership: SWS Operator: SWS

  10. Current System in Place • Constructed 2006 for air quality compliance. • Blower plant • 2,400 scfm capacity • Enclosed flare • 2,000 scfm capacity • Gas collection wells and piping • 35 vertical wells • 12 horizontal wells • 8 leachate system connections • Continued expansion as landfill ages.

  11. Gas Processing System (GPS) Purpose:Process gas from field to fuel quality; deliver to Power Plant Operation:Gas delivered to GPS. Condensate and other undesirable components removed from LFG returned to GCS. DU takes ownership of LFG at Title Point (T). Delivered to Power Plant by pipeline. Ownership:SWS Operator:Doyon Utilities Gas Processing System LFG CONDENSATE LFG T PIPELINE Project Cost:$3.8 million Component Financing:$2 million from AEA Grant, all other costs paid by DU.

  12. Power Generation ARL FENCE LINE LFG JBER PIPELINE JBER Distribution Grid Power Generation Components:Generators, switch gear and related controls. Purpose:Uses LFG as fuel to produce electricity. All power delivered to JBER through Ft. Rich D Street Substation Ownership: Doyon Utilities Operator:Doyon Utilities

  13. Power Plant • Under consideration: • 5th generating unit • Organic Rankine heat recovery units • Jenbacher J420 Generators • 1.4 MW per Unit • Initial installation – 4 units • Operates on either LFG or commercial natural gas • Change fuel source on the fly

  14. Contract Timeline 2011 2012 2013 CONTRACT PERFORMANCE PERFORMANCE TESTING DEVELOPMENT COMMISSION 20 YEARS 90 DAYS CONTRACT AWARD COMMISSIONING Startup and testing of all components and systems Gas delivered at no cost. No minimum gas purchase requirement. 90 day maximum duration. DEVELOPMENT Permitting, design, procurement and construction of GPS and Power Plant No gas sold or delivered. No minimum gas purchase requirement.

  15. Contract Timeline 2011 2012 2013 PERFORMANCE TESTING CONTRACT PERFORMANCE DEVELOPMENT COMMISSION 20 YEARS 90 DAYS CONTRACT AWARD CONTRACT PERFORMANCE Full system operation. Tier gas pricing in effect. Take Or Pay minimum gas purchase requirement. PERFORMANCE TESTING Fine tune operation of GCS, GPS and power plant for optimization All gas sold at contract price. No min. gas purchase requirement. Ends latter of 1/1/13, first month after Commissioning or 24 mos. from Contract Award

  16. A Win – Win Project JBER • The project will produce ~50% of the JBER power demand • Dual fuel capability assures stable power supply • Immediate availability of fuel provides more reliable power in emergencies. Municipality • Generates revenue off a waste product. • Revenues will offset operating costs which will reflect in user tipping fees.

  17. Landfill Gas to Energy Questions? Contact Mark Madden, P.E. Director Municipality of Anchorage Solid Waste Services 907.343.6279 maddenmg@muni.org

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