Greenhouse Gases Emissions from Wastewater Treatment Plants: Minimization, Treatment, and Prevention

Table 2

Values assigned to the parameters used to estimate GHG emissions for the case studies.

Parameter	Units	Reference
CH4 emissions from leakages	0.85% of COD treated + 1.3% of CH4 burnt	[21]
N2O emissions from nitrification-denitrification units	0.5% of the nitrogen treated	[42]
N2O emissions from 1-stage partial nitritation-Anammox reactors (sludge line)	0.8% of the nitrogen treated	[43]
N2O emissions from PN reactor (main stream)	0.1% of the nitrogen treated	[44]
N2O emissions from Anammox reactor (main stream)	0.1% of the nitrogen treated	[45]
N2O emissions from CANDO process	3.4% of the nitrogen treated + 1.3% of N2O burnt	[21, 46]

Taking into account the fact that CH₄ leakage from the cogeneration engine is 15% of the CH₄ emissions. Taking into account the fact that all the ammonia present in the wastewater is converted into nitrite in the partial nitrification reactor and supposing a leakage of the N₂O from the cogeneration engine similar to that of the CH₄.