Fig. 2
From: Continuous sulfide supply enhanced autotrophic production of alcohols with Clostridium ragsdalei
Variation of temperatures in autotrophic batch processes with C. ragsdalei in a continuously gassed STR. Cell dry weight (A CDW) and product concentrations (B acetate; D ethanol; E 2,3-butanediol) and the CO uptake rates (F rCO): 37 °C (C black diamonds, black lines), 32 °C (C blue squares, blue lines) and 27 °C (C red triangles, red lines). The batch processes were operated at a working volume of 1 L, volumetric power input of 3.5 W L−1, pH 6.0, and a gas flow rate of 5 NL h−1 with an inlet partial pressure of 0.2 bar H2, 0.2 bar CO2, and 0.6 bar CO. Standard deviations are shown for the processes at pH 6.0, which were conducted in triplicate; CO uptake rates are shown without standard deviations