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Table 1 The fermentation products of CPB6 with different electron acceptors (EAs)

From: Improvement of n-caproic acid production with Ruminococcaceae bacterium CPB6: selection of electron acceptors and carbon sources and optimization of the culture medium

Groups

Lactate consumption (g/L)

Fermentation products (g/L)a

Acetic acid

Propionic acid

Butyric acid

Pentanoic acid

Caproic acid

Heptanoic acid

Octanoic acid

Without EA

5.49

ND

ND

ND

ND

1.96 ± 0.10

ND

ND

With EA

 Ace

11.66

5.49 ± 0.22b

ND

1.12 ± 0.06

ND

4.62 ± 0.17

ND

ND

 Pro

11.76

1.41 ± 0.03

3.22 ± 0.09b

0.87 ± 0.03

4.38 ± 0.15

1.76 ± 0.16

0.68 ± 0.07

ND

 But

11.86

1.72 ± 0.07

ND

4.05 ± 0.13b

ND

8.07 ± 0.18

ND

ND

 Pen

7.90

ND

ND

ND

6.49 ± 0.31b

1.78 ± 0.21

2.09 ± 0.31

ND

 Cap

5.31

ND

ND

ND

ND

9.00 ± 0.15b

ND

ND

  1. ND not detected
  2. a The data represents the average of triplicate determinations after 3-day cultivation. The fermentation medium contains 12 g/L lactate with 100 mM different electron acceptors including acetate, propionate, butyrate and pentanoate except caproate (50 mM)
  3. b The values are undefined as products or unspent substrates
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Microbial Cell Factories

ISSN: 1475-2859

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