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

Table 2.

Specific growth rate, biomass productivity, carbon content, and carbon dioxide fixation rate of two Spirulina strains cultivated in indoor raceway ponds (4 m²) at different pH values.

pH	Strain	*μ (d^-1)*	P (mg L⁻¹ d⁻¹)	C (% W W⁻¹)	RCO₂ (mg L⁻¹ d⁻¹)
9.5	208	0.194 ± 0.004^a	29.20 ± 0.001^a	46.99 ± 0.856^a	50.30 ± 0.001^a
10.0		0.197 ± 0.002^a	24.80 ± 0.001^b	47.68 ± 0.686^a	43.35 ± 0.000^b
10.5		0.164 ± 0.002^b	20.00 ± 0.000^c	45.99 ± 0.750^a	33.73 ± 0.001^c
9.5	220	0.185 ± 0.190^a	26.40 ± 0.001^a	44.82 ± 1.237^a	43.36 ± 0.001^a
10.0		0.154 ± 0.005^a	21.27 ± 0.000^b	38.32 ± 0.601^b	29.87 ± 0.000^b
10.5		0.154 ± 0.013^a	20.80 ± 0.001^b	37.93 ± 0.863^b	28.91 ± 0.001^b

Phosphate concentration was 200 mg L⁻¹ and dissolved inorganic carbon (DIC) concentration was 0.1 mol L⁻¹ 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.