Biodiesel quality and biochemical changes of microalgae Chlorella pyrenoidosa and Scenedesmus obliquus in response to nitrate levels

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作者：
Wu, Hongqin [1 ,3 ]
Miao, Xiaoling [1 ,2 ,3 ]
机构：
[1] State Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai,200240, China
[2] State Key Laboratory of Motor Vehicle Biofuel Technology, Nanyang,473000, China
[3] Biomass Energy Research Center, Shanghai Jiao Tong University, Shanghai,200240, China
来源：
Bioresource Technology | 2014年 / 170卷
关键词：
Biodiesel quality associated with biochemical components of Chlorella pyrenoidosa and Scenedesmus obliquus under different nitrate levels were investigated. The highest lipid contents of 54.5% for C. pyrenoidosa and 47.7% for S. obliquus were obtained in nitrate absence. Carbohydrate peaked at 0.3gL-1 with values of 40.7% for C. pyrenoidosa and 42.5% for S. obliquus. Protein content seemed species dependent; which decreased substantially to 11.2% in C. pyrenoidosa and 8.8% in S. obliquus under nitrate absence in present research. Better biodiesel quality (e.g. cetane number >58; iodine value -1; where the highest saturated fatty acids (39.5 for C. pyrenoidosa; 31.2 for S. obliquus) and the lowest unsaturated fatty acids (60.5 for C. pyrenoidosa; 68.8 for S. obliquus) were obtained. These results suggest that microalgae grown in the presence of nitrogen may limit biodiesel quality. © 2014 Elsevier Ltd;
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页码：421 / 427
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