Production of Biodiesel from Microalgae

• Main Authors: Chao-Chang Chien, 簡朝璋
• Other Authors: Yi-Hsu Ju
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/qzwpg6

碩士 === 國立臺灣科技大學 === 化學工程系 === 95 === Carbon dioxide is recognized as the most responsible atmospheric pollutant for the global warming. Microalgae needs CO2 for the growing. This research aims to produce biodiesel from lipid in microalgae. Several growing conditions which can optimize the production of lipid such as nitrogen concentration, CO2 concentration, light intensity, pH, temperature and culture age as well as method of extracting oil from microalgae will be determined. High lipid production was observed with urea as the nitrogen source. Lipid production increased with the decreasing of urea concentration. Higher triacylglyceride content in the lipid was observed at low nitrogen concentration. Maximum lipid production occurred when the air was supplemented with 3.23% CO2 (0.05 VVM). Optimal culture temperature, initial pH and light intensity for lipid production were 22 oC, pH 6 and 10000 lux, respectively. Due to limited time available, only conditions for obtaining optimal algae growth and maximal lipid content were explored. The conversion of microalgae lipid into biodiesel will be left for future investigations.