. 2020 Jan 9;7:441. doi: 10.3389/fbioe.2019.00441

Table 3.

Specific growth rate, biomass productivity, carbon content, and carbon dioxide fixation rate of two Spirulina strains cultivated in indoor raceway ponds (4 m²) with different dissolved inorganic carbon (DIC) concentrations.

DIC (mol L⁻¹)	Strains	μ (d⁻¹)	P (mg L⁻¹ d⁻¹)	C (% W W⁻¹)	RCO₂ (mg L⁻¹ d⁻¹)
0.06	208	0.133 ± 0.003^b	20.67 ± 0.000^b	47.33 ± 0.361^b	35.86 ± 0.000^b
0.1		0.161 ± 0.003^a	25.83 ± 0.001^a	48.83 ± 0.085^a	46.25 ± 0.002^a
0.14		0.126 ± 0.006^b	20.05 ± 0.002^b	48.14 ± 0.424^ab	36.17 ± 0.003^b
0.06	220	0.178 ± 0.002^b	37.54 ± 0.000^b	44.12 ± 0.297^b	60.73 ± 0.000^c
0.1		0.199 ± 0.004^a	44.75 ± 0.001^a	47.10 ± 0.693^a	77.27 ± 0.001^a
0.14		0.190 ± 0.003^a	42.38 ± 0.001^a	43.30 ± 0.127^b	67.28 ± 0.002^b

Phosphate concentration was 200 mg L⁻¹ and pH was 9.5 in this experiment.

Values in the same row with different lower-case letters are significantly different (P < 0.05). Values shown are means ± standard deviation.