Fig. 8
From: CO-dependent hydrogen production by the facultative anaerobe Parageobacillus thermoglucosidasius
Gas phase composition during the cultivation of P. thermoglucosidasius DSM 2542T. Initial gas composition was 50% CO and 50% air. O2 (dark blue) decreased from 0.85 to ~ 0.03 mmol after 22 h. CO (dark red) decreased until the start of hydrogen production (dark grey) from 3.20 to 2.79 mmol (35.89 h). After 84 h the CO was consumed completely and 2.47 mmol hydrogen was produced. CO2 (dark yellow) increased during the cultivation to 2.84 mmol. After 6.01 h a maximum absorbance (OD600 in black) with a value of 0.82 was reached