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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.