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Table 4 Comparison of fermentation data (mean ± range of duplicate experiments) from the bioreactor experiments

From: Highly efficient L-lactate production using engineered Escherichia coli with dissimilar temperature optima for L-lactate formation and cell growth

Strains Overall volumetric lactate productivity (g/l h)a Oxygen-limited volumetric lactate productivity (g/l h)b Oxygen-limited specific lactate productivity (g/g h)c Oxygen-limited specific glucose consumption rate (g/g h)d Aerobic biomass yield (g/100 g glucose)e Oxygen-limited lactate yield (g/100 g glucose)f Lactate titer (g/l) Yield (g/100 g glucose) (The molar yield)g
         biomass lactate acetate succinate pyruvate
090B3 h 2.67 ± 0.10 3.46 ± 0.23 0.42 ± 0.00 0.50 ± 0.01 36.9 ± 0.2 83.0 ± 1.2 106.8 ± 1.1 5.8 ± 0.1 74.3 ± 1.2 (1.49 ± 0.02) 0.6 ± 0.1 0.3 ± 0.0 0.0 ± 0.0
090B3 i 4.66 ± 0.12 6.77 ± 0. 30 0.98 ± 0.10 0.97 ± 0. 04 36.8 ± 0.1 97.0 ± 0.5 142.2 ± 0.7 4.9 ± 0.3 87.0 ± 2.1 (1.74 ± 0.04) 0.4 ± 0.1 0.1 ± 0.1 0.1 ± 0.2
  1. aAverage volumetric productivity for lactate during the overall fermentation process.
  2. bAverage volumetric productivity for lactate during the oxygen-limited phase.
  3. cAverage specific lactate productivity during the oxygen-limited phase. The molar yield was also presented in parentheses.
  4. dAverage specific glucose consumption rate during the oxygen-limited phase.
  5. eAverage biomass yield during aerobic phase.
  6. fAverage lactate yield during the oxygen-limited phase.
  7. gAverage yield during the overall fermentation process.
  8. hThe fermentation was carried out with aerobic cell growth at 37°C followed by fermentation at 37°C.
  9. iThe fermentation was carried out with aerobic cell growth at 37°C followed by fermentation at 42°C.