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Table 6 Fermentation parameters of synthetic media (SM) with/without the addition of various nitrogenous compounds commonly found in AFEX-CS hydrolysates (ACHs)

From: Designer synthetic media for studying microbial-catalyzed biofuel production

  Biomass yield (g/g) Xylose consumption a (%) Ethanol productivity a (g/L/h) Ethanol yield (g/g) Glycerol yield (g/g) Xylitol yield (g/g) Acetate yield (g/g)
Blank (SM)b 0.068 ± 0.001 95 ± 1 0.71 ± 0.01 0.411 ± 0.005 0.059 ± 0.001 0.060 ± 0.004 0.010 ± 0.001
Blank + pyrazines 0.070 ± 0.002 95 ± 0 0.72 ± 0.00 0.416 ± 0.002 0.062 ± 0.003 0.061 ± 0.001 0.010 ± 0.004
Blank + imidazoles 0.070 ± 0.002 95 ± 0 0.72 ± 0.00 0.414 ± 0.001 0.062 ± 0.003 0.060 ± 0.003 0.012 ± 0.000
Blank + amides 0.061 ± 0.000 80 ± 1 0.65 ± 0.01 0.390 ± 0.005 0.069 ± 0.001 0.056 ± 0.003 0.013 ± 0.001
  1. aBoth xylose consumption and ethanol volumetric productivity are shown at 48 h.
  2. bExcept for biomass yield, the differences between all other blank (SM) results from Tables 5 and 6 are not statistically significant (P > 0.05).