Table 1.
Performance of biomass production, carbohydrate production, and CO2 fixation of large-scale batch cultivation of S. obliquus CNW-N under indoor conditions with different durations of nitrogen depletion
| Cultivation time under nitrogen depletion (d) | Biomass productivity (mg L−1d−1) |
Carbohydrate (glucose) content (%) | Carbohydrate (glucose) productivity (mg L−1d−1) | CO2 fixation rate (mgL−1d−1)a |
|---|---|---|---|---|
| Nitrogen rich | 408.4 ± 20.9 | 18.4 ± 2.9 (12.7 ± 1.3) | 75.1 ± 4.7 (51.8 ± 3.1) | 717.7 ± 33.7 |
| 0 | 397.5 ± 13.1 | 26.2 ± 1.7 (19.5 ± 0.9) | 104.2 ± 5.6 (77.6 ± 2.9) | 695.7 ± 22.8 |
| 1 | 393.4 ± 15.4 | 35.5 ± 2.4 (28.7 ± 1.5) | 139.5 ± 8.1 (112.8 ± 6.7) | 688.5 ± 26.9 |
| 2 | 378.1 ± 9.7 | 41.0 ± 3.1 (33.9 ± 2.9) | 154.9 ± 8.3 (128.0 ± 7.9) | 661.7 ± 16.8 |
| 3 | 360.5 ± 10.2 | 44.8 ± 2.4 (37.5 ± 1.1) | 161.4 ± 6.7 (135.3 ± 5.5) | 630.8 ± 17.9 |
| 4 | 341.1 ± 11.6 | 50.0 ± 2.7 (42.4 ± 1.0) | 170.7 ± 6.4 (144.7 ± 5.3) | 596.9 ± 20.3 |
| 5 | 319.2 ± 13.2 | 50.0 ± 3.6 (42.1 ± 2.1) | 159.6 ± 7.8 (134.6 ± 6.9) | 558.5 ± 23.1 |
Values are the mean ± standard deviation of three replicated experiments. (Light intensity = 500 μmol m−2s−1; CO2 feeding concentration = 2.5%; working volume = 60 L.)
aCalculated from the following equation: CO2 fixation rate = Biomass productivity (mg L−1d−1) × C(%) × 44/12