Antoine Esnouf is an agronomist from Montpellier SupAgro (2014), specialized in green chemistry and bio-process for a sustainable development. After an internship at Irstea in Life Cycle Assessment (LCA) applied to a territorial biogas plant, he joined the Elsa research group in January 2015 as a PhD Student of the Laboratory of Environmental Biotechnology (INRA LBE). Being part of the Green AlgOhol project, his work deals with the environmental analysis of a production system of agro-fuel from seaweed. One of the main objective of this thesis is the development of a methodology for analyzing the correlations between the variability of Life Cycle Inventory results and LCA results.