By Mohamed Samer
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Additional resources for Abatement Techniques for Reducing Emissions from Livestock Buildings
However, it can increase using common cover materials (straw and granules) which reduce ammonia emissions effectively. The higher N2O emission rates occur when manure tank has a dry encrusted surface. Hence, the strongest encrustation delivers the highest N2O emission fluxes. Adding water to the encrusted surface, simulating rainfall, could reduce nitrous oxide emission (Berg et al. 2006a). 4 Aerobic and Anaerobic Treatment Manure can be treated and utilized as a biofertilizer (Fig. 2). Liquid manure treatment can be aeration, separation, or anaerobic digestion.
In case of using mechanical ventilation systems, the extraction of air beneath the slats reduces NH3 concentrations inside the livestock building. Higher air velocity and lower NH3 concentrations directly above the manure surface will, however, increase the release of NH3. Therefore, low air velocity with stable airflow proﬁles inside the building will minimize NH3 mass transfer from manure pits in the building. The applicability of the above-mentioned emissions abatement techniques depends strongly on the housing system and the building design.
The randomly packed media can be sand, crushed rock, river gravel, plastic biocarriers, ceramic material shaped as small beads or larger spheres, rings, or saddles. However, the practical application in agricultural facilities and factors such as cost and local availability must be considered. Chen and Hoff (2009) stated that the mixture of compost and wood chips (ratio of 30–70 by weight) has been recommended as one of the better choices. Wood chips alone are another good option assuming enough bacteria and nutrients exist in the exhaust air.
Abatement Techniques for Reducing Emissions from Livestock Buildings by Mohamed Samer