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Table 1 Results obtained for the fermentation of succinic acid on hydrolysate with the addition of glycerol at different hydrolysate:glycerol ratios

From: Production of succinic acid through the fermentation of Actinobacillus succinogenes on the hydrolysate of Napier grass

Carbon source

Hydrolysate

10:1

5:1

2:1

1:1

Glycerol

Glucose

Xylose

Titer of SA (g/L)

17.54 ± 3.80

20.23 ± 2.31

20.36 ± 0.37

22.56 ± 1.15

30.76 ± 3.44

42.30 ± 0.40

25.72 ± 1.5

21.10 ± 0.72

SA yield (g/g)

0.58 ± 0.01

0.65 ± 0.00

0.65 ± 0.01

0.70 ± 0.04

0.88 ± 0.01

1.15 ± 0.04

0.73 ± 0.03

0.57 ± 0.04

AA yield (g/g)

0.29 ± 0.03

0.29 ± 0.01

0.27 ± 0.01

0.31 ± 0.04

0.31 ± 0.01

0.13 ± 0.01

0.21 ± 0.02

0.24 ± 0.06

S/A

2.00 ± 0.07

2.30 ± 0.07

2.34 ± 0.06

2.25 ± 0.23

2.82 ± 0.21

9.81 ± 0.22

5.01 ± 2.38

2.41 ± 0.40

Productivity (g/L/h)

0.79 ± 0.07

0.84 ± 0.10

0.73 ± 0.01

0.49 ± 0.06

0.53 ± 0.01

0.61 ± 0.04

1.08 ± 0.06

0.76 ± 0.02

  1. SA succinic acid, AA acetic acid, S/A the ratio of succinic acid to acetic acid