American Carbon Registry: Methane Recovery in Animal Manure Management Systems

Sadie S

The American Carbon Registry (ACR) has approved the use of the Clean Development Mechanism’s Small Scale Methodology: AMS-III.D Methane Recovery in Animal Manure Management Systems. The methodology quantifies emission reductions associated with the introduction of anaerobic digesters on individual dairy farms. Biogas created through the digestion process can either be flared or reused to produce electricity or cooking gas.

This 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.

Winrock International & The American Carbon Registry