Emission Factors
• For domestic wastewater, inventory compilers can compare country-specific values for Bo with the IPCC default value (0.25 kg CH4/kg COD or 0.6 kg CH4/kg BOD). Although there are no IPCC default values for the fraction of wastewater treated anaerobically, inventory compilers are encouraged to compare values for MCFs against those from other countries with similar wastewater handling practices.
• Inventory compilers should confirm the agreement between the units used for degradable carbon in the waste (TOW) with the units for Bo. Both parameters should be based on the same units (either BOD or COD) in order to calculate emissions. This same consideration should be taken into account when comparing the emissions.