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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

From: Feasibility of CO2 mitigation and carbohydrate production by microalga Scenedesmus obliquus CNW-N used for bioethanol fermentation under outdoor conditions: effects of seasonal changes

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
  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.)
  2. aCalculated from the following equation: CO2 fixation rate = Biomass productivity (mg L−1d−1) × C(%) × 44/12