期刊
BIORESOURCE TECHNOLOGY
卷 267, 期 -, 页码 192-200出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.07.019
关键词
Microalgae; Metabolite; Algal extracellular substances; Long-term medium recycle; Ultrasound
资金
- National Science Fund for Excellent Young Scholars [51322811]
- Science and Technology Development Planning of Shandong Province [2012GGE27027]
- Program for New Century Excellent Talents in University of the Ministry of Education of China [NCET-12-0341]
The algal extracellular substances (AESs), mainly excreted in the lag and stationary phases, inhibited the algal growth and culture recycle. The AESs consisted of protein-like substances and saccharides, which restrained the algal lipid and protein biosynthesis. Moreover, the increasing reactive oxygen species and anti-oxidative enzymes caused by AESs led to the oxidative damage and suppressed the cell activity. The AESs affected the cells through two possible ways: one is the AESs adhered to the cell surfaces; another is the cells yielded signal molecules in response to the AESs. Fortunately, the ultrasound degraded the AESs into small molecules, which clearly alleviated the limitation and recovered the algal biomass and metabolism. This study demonstrated that ultrasonication is a promising way to alleviate the AESs, which facilitating the medium recycle for long-term continuous microalgae production.
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