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Table 1 Comparison of lactic acid production performance by the catalase-positive T. laevilacticus SK5–6 and the catalase-negative S. laevilacticus 0361T

From: D-Lactic acid fermentation performance and the enzyme activity of a novel bacterium Terrilactibacillus laevilacticus SK5–6

StrainFermentation time (h)Cell biomass (OD600)Lactic acid production performanceRemaining glucose (g/L)pH
Lactate conc. (g/L)Lactate yield (Yp/s)cLactate to cell ratio (Yp/x)dProductivity (g/L h)eOptical purity (%ee)
aT. laevilacticus SK5–601.481 ± 0.0040.00 ± 0.00000100.00122.15 ± 2.486.66 ± 0.01
1213.325 ± 0.00945.40 ± 0.850.933.483.78100.0073.25 ± 3.615.71 ± 0.01
2415.938 ± 0.01479.25 ± 2.480.945.073.30100.0037.65 ± 1.065.58 ± 0.03
3617.675 ± 0.00393.05 ± 2.050.895.352.5899.6717.20 ± 2.405.58 ± 0.03
4817.500 ± 0.003102.50 ± 1.700.845.962.1499.740.00 ± 0.005.73 ± 0.04
bS. laevolacticus 0361T00.032 ± 0.0020.00 ± 0.00000100.00120.65 ± 0.506.91 ± 0.01
120.567 ± 0.0110.00 ± 0.00000DLf118.30 ± 0.426.50 ± 0.01
241.790 ± 0.0054.75 ± 0.210.782.700.2081.10114.55 ± 2.335.82 ± 0.04
368.080 ± 0.00736.95 ± 4.600.744.591.0397.7378.40 ± 0.425.44 ± 0.02
489.770 ± 0.00664.80 ± 1.840.956.651.3599.2452.50 ± 2.405.39 ± 0.01
609.385 ± 0.00879.70 ± 0.990.908.521.3398.7931.75 ± 2.055.33 ± 0.04
729.225 ± 0.01397.70 ± 0.990.9510.631.3699.0917.75 ± 0.215.32 ± 0.03
  1. aT. Laevilacticus SK5–6 was precultured under the aerobic condition in the medium containing (per liter) 10 g glucose, 15 g yeast extract, 4 g NH4Cl, and 5 g CaCO3 supplemented with minerals and salt solution before transferring into the fermentation medium containing (per liter) 120 g glucose and 80 g CaCO3 at 50% inoculum size. The fermentation was conducted under the anaerobic condition
  2. bS. laevolacticus 0361T was precultured under the anaerobic condition in the medium containing (per liter) 10 g glucose, 10 g yeast extract, 5 g peptone, and 5 g CaCO3 supplemented with minerals and salt solution before transferring into the fermentation medium containing (per liter) 120 g glucose and 80 g CaCO3 supplemented with minerals and salt solution at 10% inoculum size. The fermentation was conducted under the anaerobic condition
  3. cLactate yield represented the cumulative value of the ratio of the amount of lactate produced to the amount of glucose consumed at a time
  4. dLactate to cell ratio referred to the specific production of lactate per unit of cell biomass at a time
  5. eLactate productivity was calculated from the volumetric production of lactate at a time
  6. fDL referred to the presence of racemate of lactate at that time