Skip to main content

Advertisement

Table 3 Results of fermentation experiments with 2 % glucose and addition of BQ or DMBQ

From: Identification of benzoquinones in pretreated lignocellulosic feedstocks and inhibitory effects on yeast

Compound (g/l) Glucose start (g/l) Glucose at time point t (g/l) Glucose consumed at time point t (g/l) YEtOH on consumed sugara BEYb Q EtOH c Time point t (h)
Experimental series A
 BQ
  0.02 19.5 ± 1.9 17.2 ± 1.7 2.4 ± 0.2 0.25 ± 0.03 0.03 ± 0.01 0.05 ± 0.01 12
  0.20 19.5 ± 1.9 17.4 ± 1.7 2.2 ± 0.2 0.26 ± 0.03 0.03 ± 0.01 0.05 ± 0.01 12
  1.00 19.5 ± 1.9 17.1 ± 1.7 2.5 ± 0.2 0.21 ± 0.02 0.03 ± 0.01 0.04 ± 0.01 12
 DMBQ
  0.02 19.5 ± 1.9 2.3 ± 0.2 17.6 ± 1.7 0.41 ± 0.04 0.36 ± 0.04 0.59 ± 0.06 12
  0.20 19.5 ± 1.9 17.4 ± 1.7 2.2 ± 0.2 0.22 ± 0.02 0.02 ± 0.01 0.04 ± 0.01 12
  1.00 19.5 ± 1.9 16.2 ± 1.6 3.4 ± 0.3 0.13 ± 0.01 0.02 ± 0.01 0.04 ± 0.01 12
  Reference 19.5 ± 1.9 2.7 ± 0.3 17.3 ± 1.7 0.50 ± 0.05 0.43 ± 0.04 0.70 ± 0.07 12
Experimental series B
 BQ
  0.002 19.5 ± 1.9 2.7 ± 0.3 16.9 ± 1.7 0.50 ± 0.05 0.43 ± 0.04 0.35 ± 0.04 24
  0.005 19.5 ± 1.9 2.7 ± 0.3 16.9 ± 1.7 0.49 ± 0.05 0.42 ± 0.04 0.23 ± 0.02 36
  0.010 19.5 ± 1.9 2.6 ± 0.3 16.9 ± 1.7 0.49 ± 0.05 0.42 ± 0.04 0.23 ± 0.02 36
  0.015 19.5 ± 1.9 2.7 ± 0.3 16.9 ± 1.7 0.48 ± 0.05 0.41 ± 0.04 0.17 ± 0.02 48
  0.020 19.5 ± 1.9 17.5 ± 1.8 2.1 ± 0.2 0.27 ± 0.03 0.03 ± 0.01 0.03 ± 0.00 48
  Reference 19.5 ± 1.9 1.5 ± 0.2 18.0 ± 1.8 0.50 ± 0.05 0.46 ± 0.05 0.75 ± 0.08 12
  1. The table shows the values at start and at a specific time point in the fermentation experiments. The relative standard deviation of the method that was used for monosaccharide and ethanol analysis was estimated to ≤10 %
  2. ag EtOH/g consumed glucose
  3. bBalanced ethanol yield; g EtOH/g glucose prior to fermentation
  4. cVolumetric ethanol productivity; g EtOH × l−1 × h−1