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Table 1 Comparative results of batch ABE fermentation by C. acetobutylicum strains

From: Pleiotropic regulation of a glucose-specific PTS in Clostridium acetobutylicum for high-efficient butanol production from corn stover without detoxification

Strain

Sugar utilized (g/L)

Products (g/L)

YB/ABE (g/g)

PB/ABE (g/L/h)

Acetate

Butyrate

Acetone

Butanol

Ethanol

7% glucose/xylose (2:1) mixture as carbon sources

 L7

44.1 ± 1.1/9.1 ± 0.9

1.3 ± 0.2

1.0 ± 0.2

6.5 ± 0.4

11.2 ± 0.5

1.2 ± 0.1

0.21/0.36

0.19/0.32

 L7(pPthl)

45.6 ± 1.5/8.6 ± 0.8

1.1 ± 0.1

0.9 ± 0.1

6.0 ± 0.3

11.0 ± 0.5

1.8 ± 0.1

0.20/0.35

0.18/0.31

 L7(GlcG)

46.6 ± 1.3/5.3 ± 0.8

0.8 ± 0.1

0.5 ± 0.1

6.6 ± 0.5

11.1 ± 0.4

1.9 ± 0.2

0.21/0.38

0.31/0.54

 L7(ΔGlcG)

46.8 ± 1.5/13.7 ± 1.1

0.9 ± 0.1

0.4 ± 0.1

6.1 ± 0.3

11.0 ± 0.5

1.2 ± 0.1

0.18/0.30

0.15/0.25

Non-detoxified H2SO4-pretreated CSH as carbon sourcesa

 L7

15.6 ± 1.3

2.4 ± 0.2

2.1 ± 0.3

1.8 ± 0.1

2.5 ± 0.2

0.5 ± 0.1

0.16/0.31

0.07/0.13

 L7(pPthl)

15.2 ± 1.1

2.8 ± 0.2

2.3 ± 0.2

1.7 ± 0.1

2.5 ± 0.2

0.5 ± 0.1

0.16/0.31

0.07/0.13

 L7(GlcG)

45.4 ± 1.6

1.3 ± 0.1

1.1 ± 0.1

6.0 ± 0.3

10.0 ± 0.4

1.3 ± 0.1

0.22/0.38

0.28/0.48

 L7(ΔGlcG)

12.3 ± 1.4

1.7 ± 0.2

1.4 ± 0.2

1.2 ± 0.1

2.0 ± 0.1

0.4 ± 0.1

0.16/0.29

0.04/0.08

Non-detoxified enzymatically H2SO4-pretreated CSH as carbon sources

 L7

16.5 ± 1.3b

2.6 ± 0.2

2.2 ± 0.3

1.4 ± 0.1

3.0 ± 0.2

0.4 ± 0.1

0.18/0.29

0.08/0.13

 L7(pPthl)

15.6 ± 1.0b

2.9 ± 0.3

2.3 ± 0.2

1.5 ± 0.1

2.7 ± 0.1

0.5 ± 0.1

0.17/0.30

0.08/0.13

 L7(GlcG)

34.5 ± 1.9b

1.8 ± 0.2

1.5 ± 0.2

3.9 ± 0.2

7.2 ± 0.3

0.9 ± 0.1

0.21/0.35

0.20/0.33

45.0 ± 1.5c

2.7 ± 0.3

2.1 ± 0.2

5.6 ± 0.3

10.0 ± 0.3

1.0 ± 0.1

0.22/0.37

0.28/0.46

52.5 ± 2.0d

1.5 ± 0.1

1.2 ± 0.2

6.6 ± 0.4

11.0 ± 0.4

1.6 ± 0.1

0.21/0.37

0.34/0.60

60.0 ± 1.8e

2.1 ± 0.2

1.7 ± 0.1

6.7 ± 0.4

12.5 ± 0.4

1.8 ± 0.2

0.21/0.35

0.39/0.66

  1. aWith glucose supplemented to 60 g/L total sugars
  2. bCSH with 45 g/L total sugars and no nutrients added
  3. cCSH with 45 g/L total sugars and 10 g/L CaCO3 added
  4. dCSH with glucose supplemented to 60 g/L total sugars and no nutrients added
  5. eCSH with glucose supplemented to 60 g/L total sugars and 10 g/L CaCO3 added
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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