| Abstrak/Abstract |
Euglena gracilis is a photosynthetic Euglenophyte capable of
carbon dioxide fixation and lipid synthesis, offering a sustainable
approach to renewable energy production. This study investigates the
effects of mono- and multi-light spectra on the growth and fatty acid
methyl ester (FAME) production of E. gracilis. The cultures were
subjected to various light spectra, including red, blue, purple,
red-blue, and white (control), to analyze their impact on growth
rates, lipid accumulation, and FAME profiles. Growth metrics,
including cell density, biomass, specific growth rate, and doubling
time, were recorded, and FAME analysis was performed using GCFID. Results indicated that purple light significantly enhanced growth,
achieving the highest saturated fatty acid (SFA) content (31.7%),
while red-blue light yielded the highest lipid concentration (0.680 ±
0.028 g L⁻¹). In contrast, blue light promoted the production of
unsaturated fatty acids (UFA), with a composition of 74.62%. This
study contributes to expanding the FAME profile database and
highlights the potential of E. gracilis in Indonesia as a biodiesel
source, particularly in the context of ecological modifications such as
light spectrum optimization. The findings underline the organism's
viability as a sustainable biofuel source, supporting efforts toward
renewable energy development. |
