Center for Systems Biology and Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, School of Engineering and Natural Sciences, University of Iceland, 101 Reykjavík, Iceland; Division of Science and Math, Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
Center for Systems Biology and Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, School of Engineering and Natural Sciences, University of Iceland, 101 Reykjavík, Iceland.
Sci Total Environ. 2019 Mar 1;654:275-283. doi: 10.1016/j.scitotenv.2018.11.120. Epub 2018 Nov 9.
To convert waste CO from flue gases of power plants into value-added products, bio-mitigation technologies show promise. In this study, we cultivated a fast-growing species of green microalgae, Chlorella vulgaris, in different sizes of photobioreactors (PBRs) and developed a strategy using small doses of sugars for enhancing CO sequestration under light-emitting diode illumination. Glucose supplementation at low levels resulted in an increase of photoautotrophic growth-driven biomass generation as well as CO capture by 10% and its enhancement corresponded to an increase of supplied photon flux. The utilization of urea instead of nitrate as the sole nitrogen source increased photoautotrophic growth by 14%, but change of nitrogen source didn't compromise glucose-induced enhancement of photoautotrophic growth. The optimized biomass productivity achieved was 30.4% higher than the initial productivity of purely photoautotrophic culture. The major pigments in the obtained algal biomass were found comparable to its photoautotrophic counterpart and a high neutral lipids productivity of 516.6 mg/(L·day) was achieved after optimization. A techno-economic model was also developed, indicating that LED-based PBRs represent a feasible strategy for converting CO into value-added algal biomass.
为了将电厂烟道气中的废 CO 转化为高附加值产品，生物缓解技术显示出了巨大的潜力。在本研究中，我们在不同大小的光生物反应器（PBR）中培养了一种生长迅速的绿藻小球藻，并开发了一种在发光二极管照明下用少量糖增强 CO 固定的策略。低水平的葡萄糖补充会增加光自养生长驱动的生物量生成，以及 10%的 CO 捕获，而其增强与供应的光子通量增加相对应。与单独使用硝酸盐作为唯一氮源相比，利用尿素作为唯一氮源会使光自养生长增加 14%，但氮源的改变并不影响葡萄糖诱导的光自养生长的增强。优化后的生物量生产力比纯光自养培养的初始生产力高 30.4%。所获得的藻类生物质中的主要色素与其光自养生物质相当，优化后中性脂类的生产力达到了 516.6 mg/（L·天）。还开发了一个技术经济模型，表明基于 LED 的 PBR 是将 CO 转化为高附加值藻类生物质的一种可行策略。
