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Table 1 Performance indexes for controlled fermentation FMC and for the reference fermentation strategies (BBP and SAC)

From: Metabolic fluxes-oriented control of bioreactors: a novel approach to tune micro-aeration and substrate feeding in fermentations

Performance indexes FMC BBP SAC
Ethanol (g L−1) 87 ± 2 62.1 ± 0.3 57.2 ± 0.8
Glycerol (g L−1) 8.76 ± 0.01 9.33 ± 0.02 9.3 ± 0.1
Yx/s (gcells g substrate −1 ) 0.11 ± 0.001 0.08 ± 0.01 0.08 ± 0.01
YEtOH/s (gethanol g substrate −1 ) 0.46 ± 0.01 0.38 ± 0.03 0.39 ± 0.02
Prx (g L−1 h−1) 1.2 ± 0.2 0.59 ± 0.01 0.77 ± 0.01
Prp,Ethanol (g L−1 h−1) 7.0 ± 0.2 3.75 ± 0.02 4.05 ± 0.02
SIndex 9.9 ± 0.8 6.6 ± 0.1 6.2 ± 0.7
Total glucose mass fed (g) 616 ± 4 552 ± 2 544 ± 2
Conversion (%) 99.6 ± 0.4 97.88 ± 0.02 99.00 ± 0.02
  1. Ethanol and glycerol concentrations at the end of the cultivation. Overall cultivation parameters estimated: Yx/s biomass yield, YEtOH/S ethanol yield, PrX volumetric cell productivity, Prp,Ethanol volumetric ethanol productivity, SIndex selectivity index, STotal total glucose mass fed