U'S' Environmental Protection Agency WARM Model: WAste Reduction Model

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U.S. Environmental Protection Agency WARM
Model WAste Reduction Model

• Timonie X. Hood
• U.S. EPA Region 9
• California Resource Recovery Association
  Conference
• August 4, 2008

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Overview

• What is the WARM Model 8?
• Using WARM
• WARM Model Uses
• WARM Model Opportunities for Improvement

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WARM Model Materials IncludedRecyclables
Compostables Building Materials


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WARM Model BackgroundOnline and Excel
Spreadsheet Calculator

• Streamlined Lifecycle Analysis
• Compares greenhouse gas impacts of material
  management alternatives
• Source Reduction Prevention, Reuse
• Recycling
• Composting
• Landfilling
• Assumes default 75 landfill gas recovery rate
• Excel version can set adjusted/actual landfill
  gas recovery rate
• Incineration
• Includes transportation impacts
• 20 mile distance assumption
• User defined inputs tons of materials
• Enter Baseline Scenario and Alternative(s)

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WARM Considers

• MOST EMMISSIONS Energy consumption needed to
  make, transport, use and dispose of material
• CH4 emissions from landfills
• Non-energy-related manufacturing emissions
• CO2 and nitrous oxide (N2O) emissions from waste
  combustion
• Carbon sequestration

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Greenhouse Gas Sources Sinks Associated with
the Material Life Cycle
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Using WARM

• The first screen is the input screen.
• Enter total Tons Generated for each material
  type.
• Enter tons in current disposal method (Recycled,
  Landfilled, Combusted, Composted)
• Use as many waste management scenarios as you
  like, but it must Tons Generated
• Enter alternative scenario, assumptions, and
  select outputs

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WARM Results
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WARM Model Outputs

• Simple online report
• Conveys current material waste management
  practices, proposed changes, or zero waste plans
  in climate impacts
• Metric Tons of Carbon Equivalent (MTCE)
• Metric tons of carbon dioxide equivalent (MTCO2E)
• Units of Energy (million BTU)
  Equivalent
  to...
• - Passenger Cars Removed from the Road/Year
• - Barrels of Oil
• - Gallons of Gasoline
• - Household Annual Energy Consumption
  
  (Excel Version Only)
• USES Climate Plans, Outreach, Program Priorities

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WARM Model Caveats

• Emission results are relative to alternative
• scenarios
• Factors do not reflect use phase emissions
• Not all waste management practices are
• included (e.g., anaerobic digestion)
• Model is based on national assumptions (energy
  mix, production impacts, etc.)

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WARM Model Opportunities

• Additional research
• Landfill and organics/composting emissions
• Real world research/data
• Landfill Gas Recovery rates assumptions/improve
  user flexibility
• Incineration
• Analysis from a single processing facility
• Add additional materials
• Detailed information on assumptions
• www.epa.gov/climatechange/wycd/waste/report
  s.html

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Additional Information

• WARM Model SEARCH EPA WARM
• http//epa.gov/climatechange/wycd/waste/calculator
  s/Warm_home. html
• EPA West Coast Waste Prevention, Recovery, and
  Disposal Webinars CRRA Session, Tuesday 1-330
  pm
• http//www.epa.gov/Region10/westcoastclimate.htm
• Timonie Hood
• U.S. EPA Region 9
• [phone]
• hood.timonie_at_epa.gov