tailieunhanh - Báo cáo : Integrated Cultivation Technique for Microbial Lipid Production by Photosynthetic Microalgae and Locally Oleaginous Yeast

The objective of this research is to study of microbial lipid production by locally photosynthetic microalgae and oleaginous yeast via integrated cultivation technique using CO2 emissions from yeast fermentation. A maximum specific growth rate of Chlorella sp. KKU-S2 of (1/d) was obtained under an integrated cultivation and a maximum lipid yield of was found after cultivation for 5 days, while of lipid yield was obtained after day 6 of cultivation time by using CO2 from air. A high value of volumetric lipid production rate (QP, g/L/d), specific product yield (YP/X, ), volumetric cell mass production rate. | World Academy of Science Engineering and Technology 64 2012 Integrated Cultivation Technique for Microbial Lipid Production by Photosynthetic Microalgae and Locally Oleaginous Yeast Mutiyaporn Puangbut Ratanaporn Leesing Abstract The objective of this research is to study of microbial lipid production by locally photosynthetic microalgae and oleaginous yeast via integrated cultivation technique using CO2 emissions from yeast fermentation. A maximum specific growth rate of Chlorella sp. KKU-S2 of 1 d was obtained under an integrated cultivation and a maximum lipid yield of L was found after cultivation for 5 days while L of lipid yield was obtained after day 6 of cultivation time by using CO2 from air. A high value of volumetric lipid production rate QP g L d specific product yield Yp X volumetric cell mass production rate QX g L d were found by using ambient air CO2 coupled with CO2 emissions from yeast fermentation. Overall lipid yield of g L was obtained g L of Chlorella sp. KKU-S2 and L of T. maleeae Y30 while low lipid yield of L was found using non-integrated cultivation technique. To our knowledge this is the unique report about the lipid production from locally microalgae Chlorella sp. KKU-S2 and yeast T. maleeae Y30 in an integrated technique to improve the biomass and lipid yield by using CO2 emissions from yeast fermentation. Keywords Microbial lipid Chlorella sp. KKU-S2 Torulaspora maleeae Y30 oleaginous yeast biodiesel CO2 emissions I. Introduction The increasing demand for biofuels will create new opportunities for microorganisms and other non-food feedstocks to meet ambitious targets for renewable energy replacing fossil fuels. Microbial oils namely single cell oil SCO lipid produced from oleaginous microorganisms involving yeasts moulds and microalgae which have ability to accumulate lipids over 20 of their biomass are considered as non-food feedstock promising candidates for biodiesel .