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Table 2 Continuous l-lactic acid production by E. mundtii QU 25 using different sugar mixtures in feeding media (G100X60 or C100X60) at dilution rate of 0.2 h−1

From: Dynamic simulation of continuous mixed sugar fermentation with increasing cell retention time for lactic acid production using Enterococcus mundtii QU 25

Mixed sugarsa Xb Scglu Sdcel Sexyl X/Hf
ratios
Sgla Shaa Yila Pjla
g L−1 g L−1 g L−1 g L−1 g L−1 g L−1 g g−1 g L−1 h
G100X60 1.99 ± 0.05 75.4 ± 1.5 57.7 ± 1.3 0.096 24.2 ± 1.8 0.151 ± 0.068 0.803 4.84
C100X60 2.42 ± 0.11 79.4 ± 1.7 49.7 ± 0.8 0.538 27.5 ± 0.5 0.383 ± 0.022 0.820 5.49
G100X60 2.06 ± 0.14 72.7 ± 1.0 57.6 ± 0.6 0.103 25.4 ± 1.3 0.134 ± 0.017 0.812 5.08
  1. aCompositions of fed medium, i.e., G100X60, 100 g L−1 glucose and 60 g L−1xylose; C100X60, 100 g L−1 cellobiose and 60 g L−1xylose; bcell concentration; ceffluent glucose concentration; deffluent cellobiose concentration; eeffluent xylose concentration; f the ratio of consumed xylose to consumed hexoses (glucose or cellobiose); glactic acid concentration; hacetic acid concentration; iyield of lactic acid production; and jlactic acid productivity