Biomass, total lipid production, and fatty acid composition of the marine diatom Chaetoceros muelleri in response to different CO2 levels.
The marine diatom Chaetoceros muelleri grown under air (0.03% CO2), 10%, 20%, and 30% CO2 conditions was evaluated to determine its potential for CO2 reduction coupled with biodiesel production. The results indicated that C. muelleri grows well with high CO2 aeration levels (10-20%) and is induced to accumulate lipids under 10-30% CO2. In particular, the highest values of the maximum biomass concentration (1.059gL(-1)), maximum specific growth rate (0.868d(-1)), maximum biomass productivity (0.272gL(-1)d(-1)), maximum CO2 biofixation (0.428gL(-1)d(-1)), and total lipid (43.40% dry weight) and neutral lipid contents were all obtained with 10% CO2 aeration. Moreover, the analysis of the fatty acid composition of C. muelleri revealed the predominance of C14-C18 fatty acids (>90%) and saturated and monounsaturated fatty acids (>80%) under all CO2 levels. The results suggest that C. muelleri has great potential to biodiesel production using flue gases.
School of Life Sciences, Xiamen University, Xiamen 361005, China.
Xin-Wei
XW
Wang
School of Life Sciences, Xiamen University, Xiamen 361005, China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361005, China. Electronic address: sunljr@xmu.edu.cn.
Jun-Rong
JR
Liang
School of Life Sciences, Xiamen University, Xiamen 361005, China.
Chun-Shan
CS
Luo
School of Life Sciences, Xiamen University, Xiamen 361005, China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361005, China.
Chang-Ping
CP
Chen
School of Life Sciences, Xiamen University, Xiamen 361005, China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361005, China.
Ya-Hui
YH
Gao
D020418:Algal Proteins / Q000378:metabolism; D056804:Biofuels; D018533:Biomass; D050260:Carbohydrate Metabolism; D057486:Carbon Cycle; D002245:Carbon Dioxide / Q000008:administration & dosage / Q000378:metabolism*; D017377:Diatoms / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D005227:Fatty Acids / Q000378:metabolism*; D050356:Lipid Metabolism; D058086:Microalgae / Q000378:metabolism
D020418:Algal Proteins; D056804:Biofuels; D005227:Fatty Acids; D002245:Carbon Dioxide
Biomass; CO(2) reduction; Chaetoceros muelleri; Fatty acid composition; Lipids content