Proximate composition, total phenolics content and antioxidant activities of microalgal residue from biodiesel production

Abstract

In biodiesel production, lipid is extracted from algal biomass but some beneficial substances may remain in its residue. In this study proximate composition, total phenolics content and antioxidant activities of a microalgal residue after lipid extraction were determined. It was found that the residue has a high protein content and the hot aqueous extract of the residue is high in both the phenolics content and the level of antioxidant activities.

Keywords

• biodiesel production
• microalgal residue
• proximate composition
• antioxidant activities
• total phenolics content
• ferric reducing power
• Trolox equivalent antioxidant capacity