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Table 4 Effect of chemicals on the growth of C. saccharolyticus and T. neapolitana and the production of hydrogen and organic acids (acetic and lactic acid).

From: Efficient hydrogen production from the lignocellulosic energy crop Miscanthus by the extreme thermophilic bacteria Caldicellulosiruptor saccharolyticus and Thermotoga neapolitana

Component

 

C. saccharolyticus

T. neapolitana

  

IC50

Sodium acetate

mmol l-1

130

>250

Calcium chloride

mmol l-1

10 to 30

>50a

Potassium phosphate

mmol l-1

35

35 to 50

Sodium sulfate

mmol l-1

35

>50

Furfural

g l-1

1 to 2

2 to 4

HMF

g l-1

1 to 2

2 to 4

  1. aThe presence of CaCl2 in the culture medium stimulated the production of hydrogen and organic acids up to a concentration of 50 mmol l-1.
  2. IC50 inhibitor concentration (mmol l-1 or g l-1), at which 50% inhibition of growth or production occurred.