Presentation on theme: "Anchorage Regional Landfill Landfill Gas-to-Energy Project Renewable Energy Alaska Project Forum January 11, 2012."— Presentation transcript:
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 Power Customer Grant Contributor Owns, operates landfill and LFG Collection system Owns LFG Processing and transmission facilities
Anchorage Regional Landfill 300,000 tons annually 8 million tons in-place 22 million ton total capacity Expected life – 2050
Landfill Gas Generation Organic Materials In Waste Stream Moisture Landfill Gas (CH4, CO2 + trace organics) Heat Anaerobic Decomposition
Gas Characteristics Typically Makeup - 50% Methane, 50% CO 2 Typical energy content – 500 BTU/ft 3 Typical moisture content – saturated May contain other constituents (Oxygen, Nitrogen, VOCs, siloxanes, H 2 S, etc.)
LFG Generation General industry rules of thumb: Each million tons of waste in place has the potential to generate 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.
Expected LFG Generation 2007 ~ 1,000 cfm/ 30 MBtu/hr 2017 ~ 1,500 cfm/ 45 MBtu/hr 2045 ~ 2,200 cfm/ 66 MBtu/hr Estimated Landfill Life EPA LMOP Generation Model Current LFG Production
Proposed Project Layout Existing Gas Collection System Proposed Power Plant Processed Gas Pipeline Existing Blower/Flare Site Gas Processing Facility
Gas Collection System (GCS) Purpose: Landfill emission control; collects LFG to central facility Gas Collection System Ownership: SWS Operator: SWS Components: Wells, piping, blowers, flare (constructed by SWS in 2006 with future expansions as needed)
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.
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 Project Cost: $3.8 million Component Financing: $2 million from AEA Grant, all other costs paid by DU. Gas Processing System LFG PIPELINE T CONDENSATE
Power Generation FENCE LINE 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 ARL JBER Components: Generators, switch gear and related controls. LFG PIPELINE JBER Distribution Grid
Power Plant 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 Under consideration: 5th generating unit Organic Rankine heat recovery units
Contract Timeline DEVELOPMENT CONTRACT PERFORMANCE PERFORMANCE TESTING COMMISSION CONTRACT AWARD 20 YEARS 90 DAYS DEVELOPMENT Permitting, design, procurement and construction of GPS and Power Plant No gas sold or delivered. No minimum gas purchase requirement. COMMISSIONING Startup and testing of all components and systems Gas delivered at no cost. No minimum gas purchase requirement. 90 day maximum duration.
Contract Timeline DEVELOPMENT CONTRACT PERFORMANCE PERFORMANCE TESTING COMMISSION CONTRACT AWARD 20 YEARS 90 DAYS 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 CONTRACT PERFORMANCE Full system operation. Tier gas pricing in effect. Take Or Pay minimum gas purchase requirement.
A Win – Win Project Municipality Generates revenue off a waste product. Revenues will offset operating costs which will reflect in user tipping fees. 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.
Landfill Gas to Energy Questions? Contact Mark Madden, P.E. Director Municipality of Anchorage Solid Waste Services