Table 1 Starting total carbon (TC) concentrations (mean ± SD) in the liquid phase and calculated COD (mean ± SD) of flasks containing different substrates at various overload levels
Substrate | Overload | Mesophilic | Thermophilic | ||
|---|---|---|---|---|---|
TC [g L−1] (± SD) | CODa (± SD) | TC [g L−1] (± SD) | CODa (± SD) | ||
Control | Â | 4.4 (0.49) | 17.9 (1.22) | 4.2 (0.08) | 17.8 (1.20) |
Tryptophan | Low | 4.8 (0.12) | 20.1 (0.43) | 5.1 (0.03) | 22.4 (0.5) |
Tryptophan | Medium | 7.5 (0.21) | 26.8 (1.43) | 7.9 (0.23) | 28.7 (0.26) |
Tyrosine | Low | 4.8 (0.07) | 20.5 (0.96) | 5.1 (0.21) | 21.9 (0.76) |
Tyrosine | Medium | 6.4 (0.32) | 28.9 (1.78) | 6.1 (0.17) | 27.8 (1.4) |
Phenylalanine | Low | 4.9 (0.26) | 21.7 (0.39) | 5.1 (0.09) | 22.5 (0.7) |
Phenylalanine | Medium | 9.5 (0.24) | 34.1 (1.18) | 9.2 (0.30) | 35.6 (0.05) |
Meat extract | Low | 5.8 (0.21) | 23.6 (0.61) | 5.9 (0.06) | 25.6 (0.26) |
Meat extract | Medium | 10.3 (0.34) | 35.5 (1.39) | 9.3 (0.73) | 35.2 (0.77) |
Meat extract | High | 21.0 (0.83) | 60 (1.19) | 18.1 (0.72) | 57.5 (0.97) |
Casein | Low | 5.9 (0.04) | 23.5 (0.31) | 6.0 (0.19) | 24.4 (0.25) |
Casein | Medium | 10.8 (0.27) | 34.1 (0.89) | 10.1 (0.35) | 36.9 (0.24) |
Casein | High | 21.5 (0.71) | 65.3 (2.57) | 20.4 (0.51) | 64.2 (0.7) |