Table 5 Kinetic parameters of cell growth and ACP production by B. sonorensis strain ACP2 as affected by different cultivation strategies. Xmax., maximal cell dry weight; \(\frac{dX}{dt}\), cell growth rate; µ, specific growth rate; Pmax, maximal ACP production; Pmax specific, specific productivity; \({Q}_{p}\), ACP production rate; \({Q}_{s}\), substrate consumption rate; \({Y}_\frac{p}{x}\), U g−1 of ACP produced per g biomass; \({Y}_\frac{p}{s}\) U g−1 of ACP produced per g substrate consumed; \({Y}_\frac{x}{s}\) g g−1, of biomass produced per g substrate consumed
Parameters | Shake flask cultivation | Uncontrollable pH Batch Cultivation | Controllable pH Batch Cultivation |
|---|---|---|---|
Growth parameters | |||
 Xmax (g. L−1) | 5.986 | 6.016 | 6.559 |
 µ (h−1) | 0.090 | 0.1 | 0.085 |
 µMax (h−1) | 0.583 | 0.634 | 1.090 |
\(\hspace{1em}\frac{dX}{dt}\)(g. L−1. h−1) | 0.315 | 0.374 | 0.396 |
Production parameters | |||
 Pmax (U L−1) | 194.26 | 216.37 | 64.416 |
 Pmax.specific (U g−1) | 134.21 | 182.98 | 51.389 |
 Pmax.time (h) | 28 | 18 | 26 |
\(\hspace{1em}{Q}_{p}\)(U L−1 h−1) | 5.023 | 7.888 | 1.5146 |
 -\({Q}_{s}\) (g. L−1. h−1) | 0.678 | 1.13 | 0.4 |
Yield coefficient parameters | |||
\(\hspace{1em}{Y}_\frac{p}{s}\)(U g−1) | 4.89 | 5.12 | 3 |
\(\hspace{1em}{Y}_\frac{p}{x}\)(U g−1) | 13.73 | 18.2 | 5.13 |
\(\hspace{1em}{Y}_\frac{x}{s}\)(g g−1) | 0.19 | 0.27 | 0.39 |
 Overall cultivation time (h) | 32 | 32 | 32 |