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 May;256:38-43. doi: 10.1016/j.biortech.2018.01.122. Epub 2018 Jan 31.
This study evaluated light emitting diodes (LEDs) as a light source in Spirulina sp. LEB 18 cultures in terms of growth parameters and biomass composition. Different photoperiods (partial and integral) and colors (blue, green, red and white) were assessed. Blue, green, red and white LEDs increased biomass productivity and maximum specific growth rate of such cultivations. The maximum biomass concentration (1.77 ± 0.02 g L) was obtained when red LEDs in integral light photoperiod were applied to cultivations. The biomass composition showed around 12.8% carbohydrates (w w), 57.4% proteins (w w) and 12.7% lipids (w w). The major fatty acids produced during cultivations were palmitic, linoleic and γ-linolenic. Green LEDs in partial light photoperiod promoted a higher concentration of phycocyanin (126.39 mg g). The potential of LEDs as an energy source in Spirulina sp. LEB 18 cultures was demonstrated by the biomass and bioproducts photostimulation.
本研究评估了发光二极管（LED）作为螺旋藻 sp.LEB 18 培养物的光源，从生长参数和生物质组成方面进行了考量。评估了不同的光周期（部分和整体）和颜色（蓝、绿、红和白）。蓝、绿、红和白 LED 提高了生物质生产力和此类培养物的最大比生长速率。当在整体光周期下应用红光 LED 时，获得了最大生物质浓度（1.77±0.02 g/L）。生物质组成显示约 12.8%碳水化合物（w/w）、57.4%蛋白质（w/w）和 12.7%脂肪（w/w）。培养过程中产生的主要脂肪酸是棕榈酸、亚油酸和γ-亚麻酸。部分光周期下的绿光 LED 促进了藻蓝蛋白（126.39 mg/g）的更高浓度。通过对生物质和生物产物的光刺激，证明了 LED 作为螺旋藻 sp.LEB 18 培养物的能源的潜力。
