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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

From: Formation of phenylacetic acid and phenylpropionic acid under different overload conditions during mesophilic and thermophilic anaerobic digestion

Substrate Overload Mesophilic Thermophilic
TC [g L−1] (± SD) CODa (± SD) TC [g L−1] (± SD) CODa (± SD)
Control   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)
  1. aCalculated from NPOC according to Dubber and Gray [48]