Fig. 3

Effects of initial cell density and light intensity. Growth profile (a) and total carbohydrate content (b) of Chlorella sp. AE10 when the initial cell density at the second stage was 0.1, 0.5, and 0.8 g L⁻¹; growth profile (c) and total carbohydrate content in DW (d) of Chlorella sp. AE10 under high and low light intensity. From day 1 to day 3, it was cultivated under 100 μmol m⁻² s⁻¹. From day 4 to day 7, it was cultivated under 1000 or 100 μmol m⁻² s⁻¹. The initial cell density at the second stage was 0.1 g L⁻¹ for experiments of light intensity (c, d)