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Emission Estimation Calculators - Booklet 1

Biogas Flare

Flaring biogas results in release of Polycyclic Aromatic Hydrocarbon (PAH) (Part 2 Substances) and Criteria Air Contaminants (Part 4 Substances).

Download spreadsheet calculator: Biogas Flaring [xls 52kb] (4 feb 2009)

Suggested estimation methodology: Emissions Factor

The general equation for emissions estimation is:

E = A x EF


  • E = emissions
  • A = activity rate
  • EF = emissions factor

Input Data

A = Amount of Biogas Burned [cubic meters]

Substance Releases

Part 2, 4 Substance Releases
Substance NameChemical Abstracts Service Registry Number (CAS RN)Footnote1PartEmission Factor (EF)Footnote2EF Units
PAH totalFootnote *20.000008714kilograms (kg)/cubic meters(m3)
Carbon Monoxide (CO)630-08-040.00005558kg/m3
Sulphur Dioxide (SO2)7446-09-540.00009211kg/m3
Oxides of Nitrogen (NOx), expressed as nitrogen dioxide (NO2)11104-93-140.0004533kg/m3
Total Particulate Matter (TPM)Footnote**Footnote*40.0008490kg/m3
Particulate Matter less than or equal to 10 micrometers (µm) (PM10)Footnote*40.0008490kg/m3
Particulate Matter less than or equal to 2.5 µm (PM2.5)Footnote*40.0008490kg/m3

Note on Emissions Factors

The default emission factors are used in the table above, however if you have a site specific emission factor you would prefer to use you may enter it in the emission factor column. If you choose to insert your own emission factor ensure that the units have been converted accordingly. 

The emission factors used in this spreadsheet are based on uncontrolled emissions. If you are using an emission control device you will have to adjust the emissions calculated by this spreadsheet according to the following formula:

Controlled Emissions = Uncontrolled emission x ((100 - control efficiency)/100)

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