The lipid content was 15.1% under the aeration condition of
0.067 vvm, lower than that of the remaining four cases (24.07–
32.01%) (Table 1). Inefficient mixture of microalgae, light and nutrients led to low growth rate, which limited the metabolism of lipid
synthesis. The maximum lipid content 32% was observed when aeration rate was 0.133 vvm and then lipid content gradually reduced
with the aeration flow increasing