School of Food and Environment, Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, Dalian University of Technology, Panjin, 124221, Liaoning, People's Republic of China.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No. 2, Nengyuan Road, Tianhe District, Guangzhou, 510640, Guangdong, People's Republic of China.
Environ Sci Pollut Res Int. 2018 Jul;25(19):18519-18527. doi: 10.1007/s11356-018-1926-1. Epub 2018 Apr 26.
Much endeavor has been dispensed recently to evaluate the potential of CO mitigation by microalgae. We introduce an alternative, novel, LED-illumination isothermal microcalorimetric method to assess the thermodynamic behaviors of microalgae for better understanding of their carbon sequestration capacity. Microalgae thermodynamic behaviors were recorded as power-time curves, and their indices such as total heat evolution (Q), maximum power output (P) and heat generated by per algae cell (J) were obtained. The values for highest (74.80 g L) and control sample (0.00 g L) of Q, P and J were 20.85 and 2.32 J; 252.17 and 57.67 μW; 7.91 × and 8.80 × J cell, respectively. According to the values of Q, a general order to promote the CO sequestration was found at 74.8 g L > 29.92 g L > 14.96 g L > 7.48 g L > 0 g L of C sources, which directly corresponded to carbon availability in the growth medium. Chlorella vulgaris GIEC-179 showed the highest peak P at 74.8 g L concentration which was directly transformed to their biomass during bio-fixation of CO process. This study is applicable for better understanding of CO fixation performance of algae.
最近，人们付出了大量努力来评估微藻对 CO 减排的潜力。我们引入了一种替代的、新颖的、基于 LED 照明的等温微量量热法，以评估微藻的热力学行为，从而更好地了解它们的碳固存能力。微藻的热力学行为被记录为功率-时间曲线，其指标，如总热量演化（Q）、最大功率输出（P）和每个藻类细胞产生的热量（J），都可以获得。Q、P 和 J 的最高（74.80 g/L）和对照样品（0.00 g/L）值分别为 20.85 和 2.32 J；252.17 和 57.67 μW；7.91 × 和 8.80 × J 细胞。根据 Q 的值，发现一个促进 CO 固存的一般顺序为 74.8 g/L > 29.92 g/L > 14.96 g/L > 7.48 g/L > 0 g/L 的碳源，这直接对应于生长介质中碳的可用性。普通小球藻 GIEC-179 在 74.8 g/L 浓度下表现出最高的 P 峰值，这在 CO 生物固定过程中直接转化为它们的生物量。本研究适用于更好地了解藻类的 CO 固定性能。
