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Table 3 Fermentability of Miscanthus hydrolysates by C. saccharolyticus and T. neapolitana.

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

  Hydrolysate
Microorganism I II III IV
  IC20 (g sugars l-1)a
C. saccharolyticus 5 to 7.5 + 7.5 to 10 +
T. neapolitana 7.5 to 10 7.5 n.d. +
  1. aIC20, hydrolysate concentration (g monomeric sugars l-1) at which 20% inhibition of organic acid production (acetic and lactic acid) occurred compared to a control fermentation on pure sugars; +, stimulation of organic acid production at the highest hydrolysate concentration tested (10 g monomeric sugars l-1); n.d., not determined.
  2. Diluted hydrolysates were tested in a concentration range. The final sugar concentration in all samples was adjusted to 10 g l-1 by addition of pure sugars. The production of organic acids (acetate and lactate) was monitored and compared to production in the control fermentations using pure sugars.