REVIEW ARTICLE
Greenhouse gas emissions from different pig manure management techniques: a critical analysis
. Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland.. Teagasc Pig Development Department, Animal and Grassland Research and Innovation Centre, Fermoy, Ireland.. Department of Science, Waterford Institute of Technology, Waterford, Ireland.. Strategic Water Infrastructure Laboratory, University of Wollongong, Wollongong, NSW 2522, Australia
Available online: 2017-05-12
Abstract
Manure management is the primary source of greenhouse gas (GHG) emissions from pig farming, which in turn accounts for 18% of the total global GHG emissions from the livestock industry. In this review, GHG emissions (N O and CH emissions in particular) from individual pig manure (PGM) management practices (European practises in particular) are systematically analyzed and discussed. These manure management practices include manure storage, land application, solid/liquid separation, anaerobic digestion, composting and aerobic wastewater treatment. The potential reduction in net GHG emissions by changing and optimising these techniques is assessed. This review also identifies key research gaps in the literature including the effect of straw covering of liquid PGM storages, the effect of solid/liquid separation, and the effect of dry anaerobic digestion on net GHG emissions from PGM management. In addition to identifying these research gaps, several recommendations including the need to standardize units used to report GHG emissions, to account for indirect N O emissions, and to include a broader research scope by conducting detailed life cycle assessment are also discussed. Overall, anaerobic digestion and compositing to liquid and solid fractions are best PGM management practices with respect to their high GHG mitigation potential.
京公网安备 11010502051620号
