Assesssing fertilisation pratices with organic residues in agriculture: A life cycle assessment perspective
2013
Pradel, Marilys
A large part of the environmental impacts in agriculture are due to the emissions of chemicals such as nitrous oxide (N2O), ammonia (NH3) and nitrate (NO3). As they generate such substances, sludges are often associated with environmental burdens and contribute to major environmental impacts (acidification, eutrophication and global warming). In this paper, we achieve a LCA study for 45 sewage sludge spreading scenarios. After assessing the system boundaries and the functional unit, inventory data were collected. Two impact assessment methods were chosen: Eco-indicator 99 and the CML baseline 2. An analysis of nitrogenous emission origins according to spreader technological performances was possible according to the first results. LCA results mainly show that pedoclimatic conditions have an influence on the environmental impacts of spreading scenarios especially for acidification, eutrophication, and global warming and that environmental impacts present significant difference between spreading machines.
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