New and Improved Implementation of the First Order Model for Landfill Gas Generation or Collection

The solid waste industry widely uses the US EPA LandGEM model for estimating landfill gas (LFG) generation and collection rates. This model is based on the typical first order decay equation where the rate of decay of a waste mass is dependent on the amount of waste mass.

  • The new model is an advancement in LFG modeling where potential methane generation capacity and the methane generation rate could be varied during any period.
  • It’s a new tool for estimating LFG emissions from sites considering advanced landfilling techniques such as leachate recirculation, bioreactors, organics diversion, i.e., situations that affect potential methane generation capacity and the methane generation rate. It could also be used at sites where the moisture content of the waste is affected by climate change and/or stormwater/infiltration management.
  • The new model is a further simplification of the LandGEM model. For a single potential methane generation capacity and the methane generation rate, the results are effectively identical. As it is an exact representation of the first order decay equation, some of the inherent approximations in LandGEM are removed.
  • It’s simple.

Download the article below, or share it using the envelope icon, or your social media account on the left navigation bar.

Download (PDF, 563KB)


SCS Address

Corporate Headquarters

3900 Kilroy Airport Way Ste 100
Long Beach, CA 90806-6816
1 (562) 426-9544 | West Coast


1 (800) 767-4727 | East Coast
1 (562) 427-0805 | FAX
[email protected]

Subscribe To Our Resources

Sign up to receive periodic bulletins of environmental issues of interest such as: regulatory policy, court cases, tax incentives, emission standards, and more.

By signing up you agree to the terms and conditions outlined in our Privacy Policy.