Objective: Biodiesel production from microalgae is one of the most suitable and
promising sources of clean energy. Various environmental factors affect the microalgae
growth. Current study investigates two environmental factors namely temperature and light
intensity which affect microalgae growth (by Response surface methodology), and suggests
properties of the produced biodiesel through two different methods under optimal cultivation
conditions such as temperature and light intensity.
Results: The results showed that temperature has the most effect on microalgae growth, so
that the optimal temperature and light intensity were obtained to be 30°C and 10 Klux, respectively.
Under foresaid conditions, biomass concentration, maximum specific growth rate
and biomass productivity were measured to be as high as 1.88 g/L, 0.1180 l/day and 0.1078
g/L/day, respectively. Saturated fatty acids composition in this microalgae include Myristic
acid (C14:0 , 41.13%), Palmitic acid (C16:0 , 10.44%) and Stearic acid (C18:0 , 0.82%).
Conclusion: The Cetane number of the produced biodiesel was measured to be 64.4, which
shows high capability of the microalgae in biodiesel production.