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Table 1 Production of metabolites under different CSL concentrations with 20 g/L crude glycerol

From: Efficient production of 1,3-propanediol from crude glycerol by repeated fed-batch fermentation strategy of a lactate and 2,3-butanediol deficient mutant of Klebsiella pneumoniae

  Yeast extract (1 g/L) CSL (%)
0.0 0.5 1.0 2.0 3.0 4.0 5.0
Biomass (g/L) 2.3 2.1 2.2 2.3 2.3 2.0 1.9 1.7
Consumption glycerol (g/L) 20.0 20.0 20.0 20.0 19.5 18.5 18.1 18.0
1,3-PDO (g/L) 8.3 ± 0.1 7.4 ± 0.2 7.8 ± 0.2 8.2 ± 0.2 7.7 ± 0.3 7.3 ± 0.4 7.3 ± 0.3 6.6 ± 05
2,3-BDO (g/L) 2.2 1.9 2.3 2.5 2.5 2.9 3.2 3.6
Ethanol (g/L) 1.4 1.3 1.3 1.5 1.6 1.9 1.9 2.1
Acetate (g/L) 1.7 1.5 1.9 2.0 2.1 2.1 2.1 2.2
Succinate (g/L) 0.69 0.4 0.8 0.9 0.9 0.9 0.9 0.9
1,3-PD yield (moL/moL) 0.50 0.45 0.47 0.50 0.48 0.48 0.48 0.44