Table 2.
Results of the simultaneous saccharification and enhanced lipid production process in the presence of different amounts of cellulolytic enzymes
| Entry | Enzymes loading (/g corn stover)* | Total mass (g/L) | Residual TRS (g/L) | Lipid (g/L) | Lipid coefficient (mg/g) | Lipid productivity (g/L/d) |
|---|---|---|---|---|---|---|
| 1 | 5 FPU, 10 CBU and 40 U | 57.2 ± 0.9 | 1.0 ± 0.1 | 13.2 ± 0.3 | 137.9 ± 3.6 | 4.06 ± 0.11 |
| 2 | 10 FPU and 80 U | 47.3 ± 0.4 | 1.8 ± 0.0 | 15.1 ± 0.1 | 159.4 ± 1.3 | 4.69 ± 0.04 |
| 3 | 10 FPU, 20 CBU and 80 U | 48.5 ± 0.5 | 1.3 ± 0.0 | 14.4 ± 0.2 | 151.8 ± 2.0 | 4.47 ± 0.06 |
| 4 | 15 FPU, 30 CBU and 120 U | 49.3 ± 0.4 | 1.6 ± 0.2 | 14.1 ± 0.6 | 148.1 ± 6.8 | 4.36 ± 0.20 |
| 5 | 20 FPU, 40 CBU and 160 U | 49.9 ± 0.5 | 3.3 ± 0.7 | 13.4 ± 0.7 | 140.1 ± 8.0 | 4.12 ± 0.23 |
*Enzyme activities are indicated for cellulase in FPU, β-glucosidase in CBU and xylanase in U, respectively. CBU, cellobiase unit; FPU, filter paper unit; TRS, total reducing sugars.