• MHT allowed the recovery of fucoidan saccharides and phenolics in liquor. Glucan to glucose conversion up 100% was obtained saccharification Sm. Energy consumption pretreatment assessed with comparative purposes. 20.5 g ethanol/L (yield = 96%) were achieved after at 180° C 11 min (S0 3.41). Multiproduct biorefinery Sm via this work. This study deals multiproduct valorization invasive macroalg...