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Table 4 Effect of agitation speed on growth of P. acidilactici in batch fermentation using 2 L stirred tank bioreactor

From: Strategies for improving production performance of probiotic Pediococcus acidilactici viable cell by overcoming lactic acid inhibition

Kinetic parameter Agitation speed (rpm)
200 300 400
Maximum viable cell concentration (cfu/mL) 1.2 × 1012 ± 0.17b 1.8 × 1012 ± 0.12a 1.0 × 1012 ± 0.23c
Time to reach maximum viable cell concentration (h) 12a 12a 12a
Viable cell yield (cfu/gGlucose) 1.4 × 1014 ± 0.18b 2.0 × 1014 ± 0.1a 1.2 × 1014 ± 0.17c
Viable cell productivity (cfu/mL h) 9.9 × 1010 ± 0.16b 1.5 × 1011 ± 0.15a 8.3 × 1010 ± 0.12c
Maximum lactic acid concentration (g/L) 12.71 ± 0.16b 13.21 ± 0.14a 11.77 ± 0.23c
Lactic acid yield (g/gGlucose) 0.91 ± 0.07a 0.92 ± 0.08a 0.91 ± 0.12a
Lactic acid productivity (g/L h) 0.53 ± 0.08a 0.54 ± 0.08a 0.48 ± 0.1b
  1. The results presented are the average of triplicate experiments and are expressed as mean ± standard deviation
  2. a,b,cMean values in the same row with different superscripts are significantly different from each other (P < 0.05)