Brewing biofuel from coffee waste: Production and GC-MS/MS characterizationElissavet Emmanouilidou, Tamari Kikalishvili, Eva Triantafyllidou, Anastasia Lazaridou, Sophia Mitkidou and Nikolaos C. KokkinosE3S Web Conf., 669 (2025) 09005DOI: https://doi.org/10.1051/e3sconf/202566909005