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Fig. 9.
Biohydrogen production and kinetic parameters of substrate utilization by Klebsiella sp_ ABZ11_
| Carbohydrate concentrations (g/l) | 5 | 7.5 | 10 | 12.5 | ||
| Biohydrogen production at initial incubation time and at maximum production (mol/l) | Glucose | Initial | 0.21 ± 0.00 | 0.21 ± 0.02 | 2.35 ± 0.03 | 0.77 ± 0.01 |
| Maximum | 26.23 ± 2.18 | 23.80 ± 3.29* | 38.55 ± 2.19* | 21.11 ± 0.14* | ||
| Fructose | Initial | 0.21 ± 0.00 | 0.47 ± 0.05 | 0.65 ± 0.46 | 0.81 ± 0.09 | |
| Maximum | 25.47 ± 2.02 | 22.77 ± 2.01 | 19.97 ± 1.60 | 16.97 ± 0.12 | ||
| Sucrose | Initial | 0.21 ± 0.00 | 0.23 ± 0.04 | 0.23 ± 0.01 | 4.52 ± 0.36 | |
| Maximum | 28.24 ± 2.96* | 22.37 ± 2.19 | 18.21 ± 0.77 | 15.91 ± 1.49 | ||
| Ketic analysis | YP/S (mol/mg) | 23.53 | 17.00 | 24.09 | 11.11 | |
| YX/S (g/mg) | 0.170 | 0.424 | 0.532 | 0.205 | ||