1 / 32

Seneca Landfill: Landfill Gas to Energy Project

Seneca Landfill: Landfill Gas to Energy Project. Presented by: Marty Siebert 2006 EGSA Spring Conference. Agenda. Landfill Gas 101 Seneca Landfill Landfill Gas LFG Collection LFG Treatment Power Generation Heat Recovery Emissions Benefits. Landfill Gas 101.

echo-hobbs
Download Presentation

Seneca Landfill: Landfill Gas to Energy Project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Seneca Landfill: Landfill Gas to Energy Project Presented by: Marty Siebert 2006 EGSA Spring Conference

  2. Agenda • Landfill Gas 101 • Seneca Landfill • Landfill Gas • LFG Collection • LFG Treatment • Power Generation • Heat Recovery • Emissions • Benefits

  3. Landfill Gas 101 • Landfill gas (LFG) is a by-product of the decomposition of municipal solid waste (MSW). • LFG: • ~ 50% methane (CH4). • ~ 50% carbon dioxide (CO2). • <1% non-methane organic compounds (NMOCs). • For every 1 million tons of MSW: • ~ 1.0 MW of electricity • ~ 550,000 cubic feet per day of landfill gas. • If uncontrolled, LFG contributes to smog and global warming, and may cause health and safety concerns.

  4. Modern Municipal Solid Waste Landfill

  5. Landfill gas production • 1 ton domestic waste => 530,00 – 880,00 ft³ Landfill gas over a period of 15 - 25 years • LHV = approx. 430 - 500 Btu/scf • 40 - 50% collectable from a covered landfill Source: Biogasvolume and Properties; U. Loll, “ATV Seminar 2/99 Essen”; Germany

  6. Seneca Landfill Project • Butler County, PA just North of Pittsburgh • State Funded Project • Combined Heat and Power (CHP) Landfill Gas to Energy Plant • Electricity used to offset grid power • Thermal used to offset natural gas boiler • Plant is over 80% efficient • Renewable/Green power source

  7. Landfill Gas Site

  8. Utilization of Landfill Gas

  9. Wellhead

  10. LFG Collection • A system of horizontal or vertical wells are constructed across a landfill. • These wells are connected to a header system. • A blower provides vacuum to the header system to collect gas from the wells. • The blower sends the landfill gas to a treatment and control system • The control system sends gas to the flare and genset as required

  11. LFG treatment, blower, and flare station

  12. LFG Conditioning and Treatment • Packaged skid downstream of LFG collection system and flare • Required LFG treatment prior to use in genset • Blower/Compressor • Increase pressure • Chillers • Knock out moisture and contaminants • Filters • Filter out contaminants

  13. LFG Conditioning and Treatment cont. • Active Carbon Vessel • Cleaning and removal of Siloxanes • Siloxanes and Hydrocarbons damage engine life and performance • Critical Issue in Project Success

  14. Gas Quality Control - Sample Data • The following adverse affects are prevented by gas cleaning: • Engine damage from siloxane buildup • Damage/Fouling to oxidation catalyst • Emissions level increases over time • Decrease in maintenance intervals

  15. Examples of Si Buildup

  16. Examples of Si Buildup

  17. Examples of Si Buildup

  18. Power Generation Equip.

  19. Power Generation • 330kW Recip. Jenbacher Gas Engine • Prime Power > 8,000 hrs/yr • Low NOx Emissions < 0.6 g/bhp-hr • Dual fuel capable • Natural Gas site over • Designed to Burn Low-Btu gas • Follows fluctuation in gas energy content • Tolerate of gas contaminants • Low Maintenance

  20. Electrical Operation and Interconnect • Utility parallel switchgear and controls • Generate electricity for site use with excess power exported to the grid • Base load application driven of thermal demand • Black start, island mode capability with load shed controls • Interconnect through Penn Power • Consolidation of site distribution

  21. Heat Recovery

  22. Heat Recovery • Engine’s jacket water and exhaust heat recovered • Hot water used to process LF’s Leachate • Leachate heated to 95degF to kill bacteria • Must be treated • Increase system efficiency • Offsets natural gas boiler

  23. Exhaust Heat Recovery Unit P Project Overview Hot Water to Leachate Process Exhaust Out Utility Paralleled Electric Output: 335kW at 480V, 60Hz, 3 Phase Hot Water Recovery Loop Remote Dump Radiators Low Temp Loop - Dumped P Clean LFG to Engine LF Gas Treatment Skid Site Loads Utility Natural Gas Secondary Fuel Source Raw LFG From Flare Skid

  24. LFG Politics and Challenges • Gas Rights • Power Purchase Agreements (PPAs) • Utility Interconnect • Emissions Permitting

  25. LFGE Project Benefits • Destroys methane and other organic compounds in LFG • Each 1 MW of generation = • planting ~11,300 acres of trees per year, • removing the emissions of ~8,400 cars per year, • preventing the use of ~89,000 barrels of oil per year • Offsets use of nonrenewable resources (coal, oil, gas) reducing emissions of: • SO2 - contributes to acid rain • NOx - contributes to ozone formation and smog • PM - respiratory health concern • CO2 - global warming gas

  26. Emission Reduction Benefits (lbs/MWh)

  27. Methane Emissions

  28. Environmental Benefits • Estimated Annual Benefits for all LFGE: • Planting over 19,000,000 acres of forest, • Preventing the use of over 150,000,000 barrels of oil, • Removing emissions equivalent to over 14,000,000 vehicles, or • Offsetting the use of 325,000 railcars of coal.

  29. Why Should We Care About LFG? • Methane is a potent heat-trapping gas. • Landfills are the largest human-made source of methane in the US. • There are many cost effective options for reducing methane emissions while generating energy. • Projects reduce local air pollution, create jobs, revenues, and cost savings.

  30. State of the LFGE Industry • 396 operational projects (January 2006) • ~9.7 billion kWh of electricity produced and ~82 billion cubic feet of gas delivered in ‘05 • Numerous projects under construction • Over 600 candidate landfills with 1,500 MW of potential capacity, or 280 billion cubic feet/yr of LFG for direct use, and ~17 MMTCE potential emissions reductions

  31. Landfill Gas and Green PowerA Winning Combination • LFGE is a recognized renewable energy resource (Green-e, EPA Green Power Partnership). • LFG is generated 24/7 and available over 90% of the time. • Serves as the “baseload renewable” for many green power projects. • LFG is among the most cost competitive renewable resources available ($0.04 - 0.06/kW). • LFG can act as a long-term price and volatility hedge against fossil fuels. • Utilities are already using LFGE.

  32. Questions? Contact Information: Marty Siebert Email: msiebert@nixonpower.com Ph: 901-751-3634

More Related