Table 2.
Studies on the effect of CO2 levels on the accumulation of lipids in different species of microalgae
| Microalgae strain | Used CO2 concentration | Change of lipid amount | Refs. |
|---|---|---|---|
| Chlorella sp. BTA 9031 | 3% (v/v) | Accumulated 25% of lipid as a percentage of dry cell weight | [98] |
| Chlamydomonas sp. JSC4 | 4% (v/v) | Generated maximum lipid content (65.3%) and productivity (169.1 mg/L/day) | [99] |
| Chlorococcum littorale | 5% (v/v) | Lipid content increased up to 34% wt | [100] |
| Scenedesmus obliquus CNW-N | The optimal CO2 consumption rate was 1420.6 mg/L/day | The highest productivity of lipid (140.35 mg/L/day) is achieved | [101] |
| Synechocystis sp. PCC6803 | 3% (v/v) | The total lipid content increased up to 14% of dry weight | [102] |
| Porosira glacialis | 20–25% levels of CO2 |
The total lipid content increased from 8.91 to 10.57% in cell dry mass Docosahexaenoic acid content increased from 3.90 to 5.75% EPA decreased from 26.59 to 23.66% |
[103] |
| Attheya longicornis | 20–25% levels of CO2 | Did not show any significant increase in total lipid content | [103] |
| Nannochloropsis oculata | 3% (v/v) | Demonstrated high lipid content (53.2 wt%) | [104] |
| Scenedesmus sp. | 10% CO2 | Lipid productivity reached up to 20.65 mg/L/day | [105] |
| Chlorella vulgaris | 30% CO2 | The highest lipid content (45.68%) and lipid productivity (86.03 mg/L/day) is obtained | [106] |