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Table 1 Summary of the experiment results

From: Very high gravity ethanol fermentation by flocculating yeast under redox potential-controlled conditions

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
  1. *Data were collected at the end of fermentation.