Patent ID: 8795994

Claim:
A method of producing biofuel comprising the following steps: generating monosugars selected from the group consisting of galactose, galactose derivative, and 3,6-anhydrogalactose by treating red algae selected from the group consisting of Gelidium amansii, Cottonii and Gracilaria verrucosa , or polysaccharides extracted from red algae selected from the group consisting of Gelidium amansii, Cottonii and Gracilaria verrucosa with a hydrolytic enzyme and/or a hydrolytic catalyst; wherein the extraction of the polysaccharides is performed by the following steps: soaking the red algae in an alkali aqueous solution and washing them with water; soaking the washed red algae in an extraction solvent for a predetermined time and extracting one or more polysaccharides selected from the group consisting of agar, carrageenan and alginic acid; and separating the extracted polysaccharides and collecting the remaining starch or cellulose; and fermenting the monosugars using a Brettanomyces custersii.