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Methane Recovery in Animal Manure Management Systems


The American Carbon Registry (ACR), a non-profit enterprise of Winrock International, has approved the use of the Clean Development Mechanism’s Small Scale Methodology: AMS-III.D Methane Recovery in Animal Manure Management Systems for registration of projects on ACR subject to applicability conditions specific for the U.S. as below.

The methodology quantifies emission reductions associated with the introduction of anaerobic digestion technologies at a dairy farm. Biogas created through the digestion process can either be flared or beneficially reused to, for instance, produce electricity. Centralized digesters whereby manure is conveyed from a group of farms to a digester facility are eligible.

The methodology is applicable under the following conditions:

  • Manure or the waste streams obtained after treatment are not discharged into natural water resources (e.g. river or estuaries);
  • The annual average temperature at the project site is greater than 41°F;
  • In the baseline scenario, the retention time of manure waste in the anaerobic treatment system is greater than one month, and if anaerobic lagoons are used in the baseline, their depths are at least 1 meter;
  • No methane recovery and destruction by flaring or combustion for beneficial use takes place in the baseline scenario.

 Finally, the methodology employs a performance standard for additionality whereby a project is deemed additional so long as there is no regulation impacting the project that requires the collection and destruction of methane from livestock manure.

Current Approved Version

5. Livestock
File PDF document Methane Recovery in Animal Manure Management Systems
File PDF document ACR Approval of AMS III D
File PDF document ACR conditions for use Dec 2017
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