Use of fertilizing residues by agricultural activities in LCA studies
Résumé
This work is a review of Life Cycle Assessment (LCA) studies dealing with agricultural use of fertilizing residues (FR). The majority of the studies were dedicated to LCA of waste and wastewater treatment systems and, in few cases, to agricultural productions. In most of the studies on LCA of waste and wastewater treatment, FR spreading induces toxicity due to heavy metals and global warming and atmospheric pollution because of emissions of nitrogen compounds. When a livestock is studied, FR spreading is generally a minor contributor to the impact compared to livestock building and animal manure stocks. The fertilizing effect of FR is taken into account by substitution of mineral fertilizers. Substitution of mineral fertilizers is the main driver of the environmental assessment result. Unfortunately, the substitution is not always explained or presented in the different studies, which makes interpretation of the results difficult. This variability of system boundaries also affects the results.
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...