By Mohamed Samer
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Additional resources for Abatement Techniques for Reducing Emissions from Livestock Buildings
Daily flushing of slurry from cattle houses would reduce total annual CH4 and N2O emissions by 35 % CO2 equivalent, and that cooling of pig slurry in-house would reduce total annual CH4 and N2O emissions by 21 % CO2 equivalent (Sommer et al. 2004). Methane emissions can be signiﬁcantly reduced by complete slurry removal between the fattening periods and subsequent cleaning of the slurry pits in pig housing. Additionally, the release of methane from indoor slurry storage can be influenced by availability of oxygen and volatile solids, pH value, substrate temperature, retention time, and presence of inhibiting compounds.
Estimating the emission factors per animal for several livestock categories and different farm classes can be used to develop emissions inventory and to upscale available national inventory (Reidy et al. 2008a). The stratiﬁed sampling and the individual farm calculations allow the comparison of emissions from speciﬁc regions and altitudes and the study of the variability among farms. This approach permits a more detailed analysis of the regional distribution of GHGs and NH3 emissions as well as a more robust and standardized monitoring of the future development of emissions.
Therefore, several studies have investigated different mitigation strategies for reducing greenhouse gases and ammonia emissions. Emissions occur at all stages of manure management: from buildings housing livestock; during manure storage; following manure application to land; and from urine deposited by livestock on pastures during grazing. Ammoniacal nitrogen (total ammoniacal nitrogen, TAN) in livestock excreta is the main source of NH3. At each stage of manure management TAN may be lost, mainly as NH3, and the remainder passed to the next stage.
Abatement Techniques for Reducing Emissions from Livestock Buildings by Mohamed Samer