20Summary

20 Summary

The carbon dioxide equivalent net conversion abatement amount for a reporting period is worked out separately for each project treatment facility. These amounts are then added together to give the total amount for the project.

For each facility, the gross abatement amount is calculated as the emissions destroyed by the combustion of methane or the sending of methane to a biogas upgrading system, or avoided by the diversion of volatile solids, or both. Biogas sent to a biogas upgrading system is considered to have its methane component destroyed, as if it had been sent to a combustion device, because subsequent usage of the biomethane results in its combustion. As a result, abatement from biogas sent to a biogas upgrading system is calculated in a manner analogous to that of a combustion device.

If a project is a biomethane conversion and displacement project or restarting biomethane conversion and displacement project involves upgrading biogas that is solely sourced from project treatment facilities, an alternative net abatement calculation approach may be used that determines methane destroyed after being sent to a biomethane facility for biogas upgrading based on the quantity and composition of biomethane produced.

From this is deducted:

(a) the potential emissions from any ineligible material processed by the facility (it is presumed that all methane generated by the ineligible material has been destroyed by combustion);

(b) any emissions generated by operation of the facility (for example, fuel use);

(c) for any diverted materials, the emissions resulting from aerobic post-diversion treatment methods.