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Table 2 Fed-batch fermentation using different CO2 capture agent and pH regulator

From: In situ carbon dioxide capture to co-produce 1,3-propanediol, biohydrogen and micro-nano calcium carbonate from crude glycerol by Clostridium butyricum

pH regulator

Fermentation

period (h)

1,3-PDO (g/L)

Butyrate (g/L)

Acetate (g/L)

Lactate (g/L)

Q1,3-PDO (g/L/h)

Yield (g 1,3-PDO/g gly)

5M NaOHa

30

85.1 ± 1.2

14.5 ± 0.2

9.63 ± 0.1

1.32 ± 0.0

2.84

0.504

5M Ca(OH)2a

16

88.6 ± 0.3

15.7 ± 0.1

9.42 ± 0.1

2.91 ± 0.1

5.52

0.486

2.5M Ca(OH)2a

16

81.1 ± 1.1

15.0 ± 0.4

8.63 ± 0.1

2.55 ± 0.1

5.14

0.481

1.5M Ca(OH)2a

19

76.3 ± 1.3

14.2 ± 0.4

8.15 ± 0.0

2.21 ± 0.0

4.09

0.483

5M Ca(OH)2b

16

88.3 ± 0.5

15.8 ± 0.5

9.34 ± 0.2

3.03 ± 0.1

5.51

0.485

5M Ca(OH)2c

16

84.5 ± 0.9

15.2 ± 0.4

9.01 ± 0.3

2.82 ± 0.0

5.28

0.483

NaOH & Ca(OH)2a

17

84.4 ± 0.6

14.2 ± 0.3

9.81 ± 0.1

1.17 ± 0.0

4.96

0.506

  1. Stirring speed: a250 rpm; b350 rpm; c150 rpm