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Table 2 Calculated parameters of sodium gluconate fermentation by A. niger inoculated with seed culture for three different initial glucose concentrations

From: Influence of initial glucose concentration on seed culture of sodium gluconate production by Aspergillus niger

Parameters Fermentations
F1 F2 F3
Initial glucose in seed culture (g/L) 256 ± 5 310 ± 10 342 ± 8
Initial glucose in fermentation (g/L) 320 ± 20 314 ± 15 331 ± 25
Initial fermentation osmotic pressure (mOsm/kg) 2292 ± 30 2200 ± 20 2340 ± 45
Fermentation time (h) 23 ± 0.5 21 ± 0.5 28 ± 0.5
Maximum total GOD activity (μLO2/h/mL) 1592 ± 121.53 2434 ± 187.31 3212 ± 308.47
Average rate of glucose consumption (g/L/h) 13.91 ± 0.54 14.95 ± 0.36 11.82 ± 0.73
Average production rate of sodium gluconate (g/L/h) 14.42 ± 0.48 16.34 ± 0.53 12.37 ± 0.51
Highest OUR value (mmol/L/h) 52.76 ± 1.21 62.34 ± 2.17 40.47 ± 2.43
Yield (g/g) 1.103 ± 0.05 1.198 ± 0.04 1.076 ± 0.09