CH4 Emissions = CH4 emissions in inventory year, kg CH4/yr
TOWi = total organically degradable material in wastewater from industry i in inventory year, kg COD/yr
i = industrial sector
Si = organic component removed as sludge in inventory year, kg COD/yr
EFi = emission factor for industry i, kg CH4/kg COD for treatment/discharge pathway or system(s) used in inventory year
If more than one treatment practice is used in an industry this factor would need to be a weighted average.
Ri = amount of CH4 recovered in inventory year, kg CH4/yr
The amount of CH4 which is recovered is expressed as R in Equation 6.4. The recovered gas should be treated as
described in Section 6.2.1.