期刊
BIORESOURCE TECHNOLOGY
卷 237, 期 -, 页码 72-77出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.04.009
关键词
CO2 capture and utilization (CCU); Microalgae; Dunaliella salina; Sodium bicarbonate (NaHCO3); Bicarbonate cultivation
资金
- Advanced Biomass R&D Center (ABC) through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2011-0031348]
- Korea Electric Power Corporation (KEPCO) [CX72-16-0009]
In this study, bicarbonate was proposed as an alternative carbon source to overcome exceedingly low CO2 fixation efficiency of conventional microalgae cultivation system. 5 g L-1 of sodium bicarbonate was found to well support the growth of Dunaliella salina, showing 2.84-fold higher specific growth rate than a bicarbonate-free control. This bicarbonate-fed cultivation also could yield biomass productivity similar to that of CO2-based system as long as pH was controlled. While the supplied CO2, because of its being a gas, was mostly lost and only 3.59% of it was used for biomass synthesis, bicarbonate was effectively incorporated into the biomass with 91.40% of carbon utilization efficiency. This study showed that the bicarbonate-based microalgae cultivation is indeed possible, and can even become a truly environment-friendly and workable approach, provided that a CO2 mineralization technology is concomitantly established. (C) 2017 Elsevier Ltd. All rights reserved.
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