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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).