Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
Bioresour Technol. 2018 Jan;247:1242-1245. doi: 10.1016/j.biortech.2017.09.143. Epub 2017 Sep 23.
LEDs have narrow wavelength bands, which can influence microalgae biomass. This study pioneers the evaluation of blue LEDs as an energy source in Chlorella fusca and Synechococcus nidulans cultures. Blue LEDs increased the specific growth rate in Synechococcus nidulans LEB 115 cultures by 80% compared to the standard light used in indoor cultivations. Moreover, blue LEDs also induced lipid accumulation in Chlorella fusca LEB 111 cells, yielding concentrations of this bioproduct of up to 23% (ww). The chlorophylls and carotenoids were photostimulated proportionally to the LED light intensity. When the intensity of the blue LEDs was increased from 50 to 150μmolms, the biomass accumulated up to 4.5 and 2.4 times more chlorophylls and carotenoids, respectively. The potential of blue LEDs as an alternative environmentally friendly light source to stimulate biomass and metabolite production for different purposes was demonstrated.
LEDs 具有较窄的波长带，这可能会影响微藻生物质。本研究开创性地评估了蓝 LED 作为 Chlorella fusca 和 Synechococcus nidulans 培养物的能源。与室内培养中使用的标准光源相比，蓝 LED 将 Synechococcus nidulans LEB 115 培养物的比生长速率提高了 80%。此外，蓝 LED 还诱导了 Chlorella fusca LEB 111 细胞中的脂质积累，该生物产物的浓度高达 23%（ww）。叶绿素和类胡萝卜素与 LED 光强度成比例地被光激发。当蓝 LED 的强度从 50μmolms 增加到 150μmolms 时，分别积累了高达 4.5 倍和 2.4 倍的叶绿素和类胡萝卜素。证明了蓝 LED 作为一种替代环保光源的潜力，可用于刺激不同目的的生物质和代谢产物的生产。
