关键词: 能源微藻, 纤维素, 可溶性多糖, 生物乙醇

Abstract: The water samples were collected from south part of the Yellow Sea. Two hundred and forty microalgae were isolated and purified from the above samples using a capillary method. Among them，eight fast-growing algae strains were cultured in large scale. The lyophilized powder of the above algae cultures were prepared for the analysis of starch，cellulose，soluble sugar and total fat. One algae strain named Navicula sp. NB-2 yielded high dry biomass and total fat (413.3 mg/g dry biomass)，and therefore was selected as the initial strain for biodiesel production in future. Another stain named Navicula sp.NB-3 had fast-growing rate，high cellulose content (92.6 mg/g dry biomass) and high soluble sugar amount (223 mg/g dry biomass). Moreover，Navicula sp.NB-3 yielded high bioethanol amount (77.5 mg/g dry biomass) and had potential for bioethanol production.

Key words: energy microalgae, cellulose, soluble polysaccharides, bioethanol