Table 2

Kinetic parameter values from C. butyricum DSP1 in 6.6 L, 42 L and 150 L bioreactors
Parameter/fermentation scale 6.6 L 42 L 150 L
Time of fermentation (h) 33 32 28
Max biomass, Xmax (g/L) 1.2 1.2 1.3
Time taken to reach max biomass, t (h) 15 16 14
Max specific growth rate, μ (1/h) 0.067 0.062 0.071
Max 1,3-PD concentration, 1,3-PDmax (g/L) 37.63 ± 1.2 36.40 ± 1.6 37.20 ± 1.4
1,3-PD productivity P1,3-PD (g/L/h) 1.12 1.13 1.33
1,3-PD yield, Y1,3-PD (g1,3- PD/gGly) 0.53 0.52 0.53
Max butyric acid concentration, Butmax (g/L) 4.26 ± 0.09 3.57 ± 0.08 4.22 ± 0.07
Butyric acid productivity PBut (g/L/h) 0.13 0.11 0.15
Butyric acid yield, YBut (gBut/gGly) 0.06 0.05 0.06
Max acetic acid concentration, Acemax (g/L) 2.0 ± 0.03 1.9 ± 0.03 2.2 ± 0.02
Acetic acid productivity PAce (g/L/h) 0.06 0.06 0.08
Acetic acid yield, YAce (gLac/gGly) 0.03 0.03 0.03
Max lactic acid concentration, Lacmax (g/L) 3.14 ± 0.02 2.84 ± 0.03 3.63 ± 0.04
Lactic acid productivity PLac (g/L/h) 0.09 0.09 0.12
Lactic acid yield, YLac (gLac/gGly) 0.04 0.04 0.05

Each point is the mean value of two independent measurements.

Szymanowska-Powałowska and Białas

Szymanowska-Powałowska and Białas BMC Microbiology 2014 14:45   doi:10.1186/1471-2180-14-45

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