Emission estimation calculators, booklet 1: chapter 4


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

where:

  • 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 Name Chemical Abstracts Service Registry Number (CAS RN)Footnote1 Part Emission Factor (EF)Footnote2 EF Units
PAH total Footnote* 2 0.000008714 kilograms (kg)/cubic meters(m3)
Carbon Monoxide (CO) 630-08-0 4 0.00005558 kg/m3
Sulphur Dioxide (SO2) 7446-09-5 4 0.00009211 kg/m3
Oxides of Nitrogen (NOx), expressed as nitrogen dioxide (NO2) 11104-93-1 4 0.0004533 kg/m3
Total Particulate Matter (TPM)Footnote** Footnote* 4 0.0008490 kg/m3
Particulate Matter less than or equal to 10 micrometers (µm) (PM10) Footnote* 4 0.0008490 kg/m3
Particulate Matter less than or equal to 2.5 µm (PM2.5) Footnote* 4 0.0008490 kg/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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