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Table 3 Net end-product formation of cellobiosea fermentations containing 50% (v/v) of spent supernatant

From: The effect of switchgrass loadings on feedstock solubilization and biofuel production by Clostridium thermocellum

Condition

Concentration (mM)

Final pH

Ethanol

Formate

Acetate

Lactate

CO2

Glucose equivalents remaining

Control

116.5 ± 5.5

11.7 ± 0.9

4.0 ± 0.6

0.7 ± 0.3

108.8 ± 9.9

1.9 ± 0.5

6.2 ± 0.0

3.5 g/L Avicel

110.7 ± 4.1

9.8 ± 0.6

3.2 ± 0.3

0.4 ± 0.0

104.1 ± 6.6

1.4 ± 0.1

6.2 ± 0.0

8.8 g/L Avicel

100.1 ± 1.8

9.3 ± 1.2

3.5 ± 0.2

0.6 ± 0.3

94.3 ± 8.4

3.0 ± 0.4

6.1 ± 0.0

17.5 g/L Avicel

91.0 ± 5.8

7.6 ± 1.0

4.1 ± 0.8

0.1 ± 0.1

87.5 ± 11.3

3.9 ± 0.4

6.0 ± 0.0

10 g/L SG

101.6 ± 2.8

11.5 ± 1.7

6.5 ± 1.0

0.7 ± 0.2

96.6 ± 9.2

1.8 ± 0.7

6.1 ± 0.0

25 g/L SG

101.4 ± 1.3

11.8 ± 0.6

4.8 ± 0.4

0.3 ± 0.0

94.4 ± 8.3

2.4 ± 0.1

6.1 ± 0.1

50 g/L SG

107.1 ± 3.2

9.4 ± 0.9

5.5 ± 0.2

0.4 ± 0.0

103.2 ± 5.5

4.6 ± 0.4

6.0 ± 0.0

  1. SG switchgrass
  2. aFermentations contained cellobiose at a concentration of 97 mM glucose equivalents. n = 6