Table 3.

Emission factors of solid, liquid fractions and biogas digestate produced from pig waste during storage

Criteria	Values	Range	Units	References
Solid manure (non-biogas farms)
NH3-N	0.308		kg NH3-N (kg N excreted)−1	Webb et al. (2012)
N2O-N	0.005	0.0027–0.01	kg N2O-N (kg N excreted)−1	Eggleston et al. (2006)
CH4-C	0.008		kg CH4 (kg volatile solid)−1	Eggleston et al. (2006)
CO2-C	0.015	0.012–0.018	kg CH4 (kg dry matter)−1	Vu et al. (2012d)
Liquid manure (non-biogas farms)
NH3-N	0.004	0.321–0.381	Fraction of TAN	See calculation above
N2O-N	0		kg N2O-N (kg N excreted)−1	Velthof et al. (2005); Eggleston et al. (2006)
CH4-C	0.005	0.042–0.055	kg CH4 (kg dry matter)−1	Vu et al. (2012d)
CO2-C	0.015	0.012–0.018	kg CH4 (kg dry matter)−1	Vu et al. (2012d)
Digestate (Biogas farms)
NH3-N	0.052		Fraction of TAN	See calculation above
N2O-N	0		kg N2O-N (kg N excreted)−1	Data connected to Vu et al. (2014)
CH4-C	0.20		Fraction of potential CH4	UNFCCC/CCNUCC (2012)
CO2-C	40/60		CH4 to CO2 ratio	Sommer et al. (2007)

TAN, total ammonical nitrogen.