Table 3.
Relation among light intensity, surface biomass productivity, biomass and Asta accumulation in BC cultures grown in the airlift PBRs
| Light intensity (µmol/m2/s) | Biomass (g/L) | Surface productivity (g/m2/day) | Asta (mg/L) | Asta/dcw (%) | Asta/car (%) | Chla/dcw (%) | |
|---|---|---|---|---|---|---|---|
| 80 mL PBRs | 250 | 2.2 ± 0.2 | 9.0 ± 0.4 | 11.5c ± 1.1 | 0.52a ± 0.04 | 83.9a ± 0.7 | 1.5a ± 0.1 |
| 750 | 4.4 ± 0.1 | 18.1 ± 0.4 | 24.7b ± 0.7 | 0.56a ± 0.01 | 86.3a,b ± 1.4 | 1.7a ± 0.1 | |
| 1500 | 6.4 ± 0.2 | 26.3 ± 0.5 | 37.0a ± 3.6 | 0.58a ± 0.05 | 88.4b ± 1.7 | 1.2b ± 0.1 | |
| 2250 | 7.5 ± 0.6 | 31.3 ± 0.9 | 38.4a ± 3.4 | 0.52a ± 0.04 | 89.7b ± 3.1 | 0.9b ± 0.2 | |
| 330-L PBR | 800 | 1.0 ± 0.2 | 16.7 ± 1.7 | 4.1 ± 1.2 | 0.4 ± 0.07 | 73.3 ± 1.9 | 2.3 ± 0.2 |
Car total carotenoids, Chla chlorophyll a, dcw dry cell weight; ± represents standard deviation. Statistical significance is expressed by different letters according to the Tukey–Kramer test (n = 8 except for the data obtained in 330L-PBR where n = 4)