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Table 3 Fermentation end products (molar concentrations) obtained during glucose fermentation performed at fixed optimal pH values (second sequence)

From: Fermentative hydrogen production from glucose and starch using pure strains and artificial co-cultures of Clostridium spp.

Strain/ co-culture

Formate (mM)

Lactate (mM)

Acetate (mM)

Butyrate (mM)

H2 yield (mol H2/ mol glucose)

Biogas production rate (L biogas/ h)a

C. beijerinckii DSM 1820

1.69

−1.85

4.48

16.99

1.88

0.55

C. butyricum CWBI 1009

−0.05

2.74

11.44

17.13

2.10

0.42

C. pasteurianum DSM 525

8.66

4.17

11.24

11.39

1.19

0.90

C. felsineum DSM 794

4.29

23.42

3.08

4.49

0.88

1.14

Co-culture 1

0.21

4.73

6.20

5.73

1.71

1.50

Co-culture 2

0.74

4.18

8.95

10.76

1.62

1.10

Co-culture 3

0.93

4.57

7.25

8.46

2.12

1.46

  1. a Maximum biogas production rate.
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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