Table 1 Summary of the experiment results
Redox potential (mV) | Duration (h) | Glucose (g/L) | Ethanol (g/L) | YPS(g/g) | Productivity (g/L/h) | Aeration (mL) | Biomass* (g/L) | Yeast viability*(%) | ||
|---|---|---|---|---|---|---|---|---|---|---|
Initial | Residue | Initial | Final | |||||||
~300 g (glucose)/L | ||||||||||
−100 | 40.0 ± 0.2 | 4.1 ± 0.3 | 125 ± 1.7 | 0.466 ± 0.02 | 1.68 ± 0.02 | 1400 | 2.95 ± 0.04 | 49.25 ± 2.81 | ||
−150 | 72 | 298 ± 3.8 | 24.0 ± 1.1 | 3.2 ± 0.1 | 131 ± 1.8 | 0.467 ± 0.01 | 1.77 ± 0.02 | 200 | 3.13 ± 0.14 | 53.33 ± 4.96 |
No control | 35.0 ± 3.2 | 1.8 ± 0.0 | 119 ± 1.5 | 0.449 ± 0.02 | 1.63 ± 0.02 | 0 | 2.98 ± 0.05 | 35.21 ± 4.21 | ||
~250 g (glucose)/L | ||||||||||
−100 | 0.2 ± 0.0 | 3.8 ± 0.3 | 120 ± 1.8 | 0.461 ± 0.03 | 2.07 ± 0.03 | 6550 | 4.80 ± 0.14 | 50.00 ± 4.68 | ||
−150 | 3.1 ± 0.1 | 2.5 ± 0.0 | 117 ± 2.2 | 0.461 ± 0.06 | 2.05 ± 0.04 | 1230 | 4.55 ± 0.64 | 59.09 ± 4.18 | ||
No control | 56 | 252 ± 2.9 | 17.0 ± 0.3 | 4.9 ± 0.3 | 113 ± 1.4 | 0.462 ± 0.04 | 1.94 ± 0.02 | 0 | 3.51 ± 0.58 | 44.07 ± 2.06 |
~200 g (glucose)/L | ||||||||||
−100 | 0.0 ± 0.0 | 2.6 ± 0.0 | 93 ± 1.3 | 0.445 ± 0.02 | 2.82 ± 0.04 | 9220 | 6.45 ± 0.60 | 68.89 ± 6.22 | ||
−150 | 32 | 201 ± 3.1 | 21.0 ± 0.2 | 4.9 ± 0.3 | 83 ± 1.4 | 0.434 ± 0.02 | 2.43 ± 0.04 | 3120 | 4.20 ± 0.60 | 76.04 ± 5.85 |
No control | 24.0 ± 0.4 | 1.8 ± 0.2 | 83 ± 1.5 | 0.463 ± 0.01 | 2.54 ± 0.05 | 0 | 3.05 ± 0.36 | 65.00 ± 13.3 | ||