Table 1: Values assigned to the parameters used to estimate CO2 emissions.

ParameterUnitsReference

CO2 emissions from energy consumption0.391 kg CO2/kW⋅h [40]
CO2 emissions from COD oxidation0.08 kg CO2/kg COD
CO2 emissions from CH4 combustion3.5 kg CO2/Nm3

Estimated taking into account an elemental composition of C2.43H3.96O for the biodegradable fractions of the COD [41]. Calculated from stoichiometry and ideal gas law.