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Table 2 Performance of the biofilm reactors with butanol maintained at different levels

From: Biobutanol production in a Clostridium acetobutylicum biofilm reactor integrated with simultaneous product recovery by adsorption

Fermentation process

Ethanol(g/L)

Butanol(g/L)

Acetone(g/L)

Acetoin(g/L)

Butyrate(g/L)

Yield(g/g)

Productivity(g · L-1 · h-1)

MaximumOD600 nm

Biofilm reactor, fixed-bed adsorption 2.5 to 3.2 g/L butanol

1.37

10.6

5.73

1.51

1.88

0.32

1.47

7.88

Biofilm reactor, fixed-bed adsorption 4.0 to 5.5 g/L butanol

1.44

11.1

6.32

1.23

0.95

0.33

1.60

3.46

Biofilm reactor, fixed-bed adsorption 5.2 to 6.4 g/L butanol

1.49

11.7

6.43

1.25

0.49

0.35

1.53

1.55

Biofilm reactor, without adsorption

1.48

11.6

6.70

0.98

0.17

0.35

1.66

0.30

Traditional planktonic cell fermentation, without adsorption

2.1

11.8

4.6

1.8

0.29

0.34

0.25

3.2

  1. The data represent the averages of two independent fermentations. Data for acetate are not shown. Typically, acetate displayed a change trend similar to that of butyrate. OD, optical density.
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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