Typical and default values – biomethane - mixtures of manure and maize: greenhouse gas emissions with shares given on a fresh mass basis
Biomethane production system Technological options Typical value Default value (g CO_(2)eq/MJ) (g CO_(2)eq/MJ) Manure – Maize 80 % - 20 % Open digestate, no off-gas combustion 32 57 Open digestate, off-gas combustion 17 36 Close digestate, no off-gas combustion – 1 9 Close digestate, off-gas combustion – 16 – 12 Manure – Maize 70 % - 30 % Open digestate, no off-gas combustion 41 62 Open digestate, off-gas combustion 26 41 Close digestate, no off-gas combustion 13 22 Close digestate, off-gas combustion – 2 1 Manure – Maize 60 % - 40 % Open digestate, no off-gas combustion 46 66 Open digestate, off-gas combustion 31 45 Close digestate, no off-gas combustion 22 31 Close digestate, off-gas combustion 7 10 Where biomethane is used as Compressed Biomethane as a transport fuel, a value of 3,3 g CO_(2)eq/MJ biomethane needs to be added to the typical values and a value of 4,6 g CO_(2)eq/MJ biomethane to the default values.
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Source: EUR-Lex (Cellar) · retrieved 2026-10-28 · Text as adopted (Official Journal); later amendments are not incorporated in this text.