學生姓名:
林培鈞
指導教授:
孫寶年
學期:
110上
摘 要:
Chlorella pyrenoidosa (C. pyrenoidosa), a type of lipid-rich green microalgae, features broad prospects for applications in such fields as health foods, biodiesel and so on. The light utilizing efficiency of the algal cells is a critical factor that influences the biomass and lipid
contents of photoautotrophic microalgae. Chu et al. (2021) explored the effects of light emitting diode (LED) wavelength or two
phase culture of mixed light sources on the growth and lipid accumulation of C. pyrenoidosa . Cultivation with different LED wavelengths (white, purple, blue, green, yellow and red) under a light intensity of 200 μmol / m2 •s showed that the red light gave the maximum biomass, and
the green light gave the highest lipid content. The lipid contents of C. pyrenoidosa being treated under two-phases (first phase : red for 12 d, second phase : green light for 8 d , R→G) was higher than mixed LED (R:G = 3:7 or R:G = 7:3). Fatty acid (FA) analyses showed that 13
types FAs were detected and unsaturated FAs were over 50% (w/w) Additionally, although no difference in the FA composition of C. pyrenoidosa treated with different protocols was found, the absolute content did differ significantly, coinciding with that of the total lipids. He et al. (2021) chose the red LED and the blue LED as the light source in order to increase the lipid content of microalgae as well as to reduce the energy consumption. The results showed that the highest biomass and lipid weight of C. pyrenoidosa were achieved under 5000lux light intensity, 8L:16D of photoperiod and red continuous LED light, which were 0.73 g/L and 0.552 g/L respectively. And it consumed 29.4 times less energy consumption for units of the total lipid content than that of tricolor energy-saving lamp. Furthermore, compared with intermittent LED lights, continuous LED lights are a better light source for C. pyrenoidosa.
摘要 (1).pdf