TABLE 1

Amount of biomass produced (final and initial), initial pH, final pH, and initial theoretical alkalinity values of the experiments

Sample culture pHSample substratebBiomass (ODc)Initial pHFinal pHInitial alkalinity (mmol/liter)Total acids produceda (mmol/liter)
6.0Glu0.34 ± 0.035.99 ± 0.044.50 ± 0.223.54 ± 0.2816.16 ± 2.13
Fru0.27 ± 0.035.95 ± 0.314.27 ± 1.193.30 ± 0.5217.71 ± 0.69
Cello0.29 ± 0.035.95 ± 0.054.33 ± 0.033.23 ± 0.3518.13 ± 0.61
6.5Glu0.35 ± 0.056.45 ± 0.136.13 ± 0.1810.66 ± 2.9912.54 ± 1.39
Fru0.39 ± 0.036.53 ± 0.046.39 ± 0.0912.37 ± 1.0413.83 ± 0.70
Cello0.49 ± 0.046.51 ± 0.024.57 ± 0.1211.88 ± 0.6416.19 ± 2.17
6.9Glu0.32 ± 0.026.86 ± 0.076.77 ± 0.0126.82 ± 4.2313.71 ± 1.20
Fru0.40 ± 0.026.92 ± 0.026.75 ± 0.0630.08 ± 1.4514.05 ± 0.51
Cello0.55 ± 0.016.94 ± 0.036.45 ± 0.0531.75 ± 1.9623.07 ± 0.23
  • a Measured after 72 h.

  • b Glu, Fru, and Cello indicate that the initial substrate was glucose, fructose, or cellobiose, respectively.

  • c OD, optical density.