50 - 60 %
||Griffiths MJ, Harrison STL. Lipid productivity as a key characteristic for choosing
algal species for biodiesel production. J Appl Phycol. 2009 21: 493–507. DOI 10.1007/s10811-008-9392-7 p.493 right column 2nd paragraph
||Sheehan J, Dunahay T, Benemann J, Roessler P (1998) A look back at the U.S. Department of Energy’s Aquatic Species Program: Biodiesel from Algae. Close-Out report. National Renewable Energy Lab, Department of Energy, Golden, Colorado, U.S.A. Report number NREL/TP-580-24190, dated July 1998
||p.493 right column 2nd paragraph: "Microalgae are a promising alternative source of vegetable oil. Due to their simple cellular structure, algae
have higher rates of biomass and oil production than conventional crops (Becker 1994). Some species of algae produce large quantities of vegetable oil as a storage product, regularly achieving 50% to 60% dry weight as lipid (primary source). Hence, algae have been claimed to be up to 20 times more productive per unit area than the best oil-seed crop (Chisti 2008)."