期刊
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
卷 4, 期 3, 页码 461-468出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ew00470b
关键词
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资金
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Programme for Changjiang Scholars and Innovative Research Team in University
- Fundamental Research Funds for the Central Universities
This study investigated the growth and biodiesel production of S. obliquus from autotrophic, heterotrophic and mixotrophic cultures under different nitrogen conditions. FAME productivities in the mixotrophic culture were 2.28 and 1.53 times greater than the combination of the autotrophic and heterotrophic cultures under nitrogen-replete and nitrogen-deplete conditions, respectively, which indicates that the mixotrophic process is not a simple combination of autotrophic and heterotrophic processes. Moreover, mixotrophic cultivation of S. obliquus coupled with nitrogen starvation led to the highest FAME productivity, which reached as high as 110.6 mg L-1 d(-1). Furthermore, high fatty acid yield in the mixotrophic culture without nitrogen supply indicated that mixotrophic S. obliquus converted the assimilated carbon to fatty acids more effectively. This study suggests a great potential to recover COD as fatty acids via S. obliquus, where biodiesel productivity and COD recovery can be significantly improved by combining nitrogen starvation with mixotrophic cultivation.
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