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Generation of Biodiesel and Carotenoids from Rhodotorula Glutinis using Sweet Sorghum JuiceRevellame, Miriam Llanto 15 December 2012 (has links)
The growth of Rhodotorula glutinis in sweet sorghum juice in three levels of three factors of temperature, carbon to nitrogen ratio and pH was evaluated. Accompanying of this growth was the generation of lipids converted to fatty acid methyl ester (FAMEs) and carotenoids. The optimized condition for maximum biomass and carotenoid accumulation was determined to be at 25C, pH of 5.5 and carbon to nitrogen ratio of 10. This condition yielded 22.7 g/L biomass with specific growth rate of 0.213 hr-1. At this condition the carotenoids generation was also maximum with 2.6 mg/gram biomass, comprising of torularhodin, beta-carotene and torulene. The accumulation of lipids following generation of biodiesel was highest at same temperature and pH but carbon to nitrogen ratio of 70, generating 96.3 mg of FAMEs/gram of biomass containing methyl ester of oleic acid, linoleic acid, palmitic acid, stearic acid and linolenic acid.
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