Two-stage mixotrophic cultivation for enhancing the biomass and lipid productivity of Chlorella vulgaris

AMB Express

Table 3 Comparison of the change in biomass concentration, biomass productivity, lipid content, lipid production, and lipid productivity of C. vulgaris in the four culture systems

	MX	MX-N	MX-C	PA
Change in biomass concentration in Phase I (g L⁻¹)	1.66 ± 0.05	1.59 ± 0.08	1.62 ± 0.06	0.99 ± 0.04
Change in biomass concentration in Phase II (g L⁻¹)	1.79 ± 0.04	–0.13 ± 0.04	0.40 ± 0.06	0.22 ± 0.04
Biomass productivity in Phase I (g L⁻¹ day⁻¹)	0.18 ± 0.01	0.18 ± 0.01	0.18 ± 0.01	0.11 ± 0.00
Biomass productivity in Phase II (g L⁻¹ day⁻¹)	0.20 ± 0.00	–	0.044 ± 0.01	0.024 ± 0.00
Final lipid content, η (%)	22.8 ± 0.8	23.3 ± 1.1	20.2 ± 1.2	24.6 ± 0.9
Final lipid production (mg L⁻¹)	786.60 ± 27.21	340.47 ± 21.40	407.83 ± 21.55	298.02 ± 25.61
Final lipid productivity (mg L⁻¹ day⁻¹)	43.70 ± 1.51	18.92 ± 1.19	22.66 ± 1.20	16.56 ± 1.42