Quantifying and Documenting Biogas Emission Reductions for Alberta Offset Projects

Once a biogas offset project has been scoped, its value rests on transparent calculations and evidence that stands up to third-party verification. This course sets out how net emission reductions are derived as baseline emissions minus project emissions, and how the result is separated into offset-eligible reductions from non-priced sources, priced reductions that are reported but not credited, and biogenic carbon dioxide reductions that are reported separately. It walks through the parameter-by-parameter quantification approach, showing for each source and sink whether values are measured or estimated, the method and frequency used, and the reasoning behind those choices.

Worked calculation structures cover baseline emissions from manure storage, passive anaerobic wastewater treatment using chemical oxygen demand (COD) balances and the methane conversion factor (MCF), avoided landfill decomposition, and displaced grid electricity, heat and pipeline natural gas. Project-side methods include flaring with destruction efficiency, catastrophic and cover venting, biogas and fossil fuel combustion, digestate storage and electricity use. The course closes with data quality management: the difference between documents and records, the evidence expected for each offset criterion, record requirements for metering and laboratory analysis, the auditable data trail, quality assurance and quality control (QA/QC) practices and liability for reverification.

What Will Be Covered:

• Net emission reduction equations and the split into offset-eligible, priced and biogenic reductions

• Measured versus estimated parameters, measurement methods and monitoring frequencies

• Baseline methane from liquid manure storage using volatile solids, maximum methane producing potential and MCF

• Passive anaerobic wastewater treatment emissions from inlet, outlet and sediment COD balances

• Avoided landfill decomposition and displaced grid electricity, on-site heat and pipeline natural gas

• Project emissions from flaring, catastrophic and cover venting, combustion, temporary digestate storage and electricity use

• Global warming potentials and conversion of results to tonnes of carbon dioxide equivalent (CO2e)

• Documents versus records and the evidence required for each general offset criterion

• Record requirements for truck tickets, meter calibration, gas composition analysis, laboratory reports and dated photographs

• QA/QC procedures, auditable data trails, record retention and liability for reverification