A Sustainable Extraction of Bioactives from Algae
A seaweed Extraction of biomass is performed in sequential steps comprising supercritical fluid extraction, pressurized liquid extraction, and subcritical extraction.
Wet biomass could include microalgae or seaweeds. For the compounds of interest quantified (lipids, proteins, sugars and the pigment fucoxanthin), recoveries reached values greater than 80% of lipids and 70% fucoxanthin present in algal biomass recovery.
In terms of the content of proteins and sugars, the process corresponding to the present invention allows to recover a percentage of proteins more than 18% and a 35% percentage of sugars from the algal biomass.
The residue of the sequential extraction contains mainly sugars and proteins.
Main innovations and advantages
· Bioactive extraction yields are clearly superior to those obtained usingthe procedure from dry biomass (lyophilized) · The usual previous dry treatment of the biomass is avoided.
· Solvents are eliminated during the process to preserve releasedcompounds from deleterious oxidation.