Modelling the Biphasic Growth and Product Formation by Enterococcus faecium CECT 410 in Realkalized Fed-Batch Fermentations in Whey

Table 4

Parameter values (means ± SD) of the models (A.6) and (A.7) used for predicting the biphasic growth of Ent. faecium CECT 410 and lactic acid production in the two realkalized fed-batch fermentations.

Parameter	Fed-batch fermentation I	Fed-batch fermentation II
μ max1 (h^-1)	0.130 ± 0.0341	0.365 ± 0.0653
KN 1 (g/L)	0.050 ± 0.0165	0.029 ± 0.0046
Nmin 1 (g/L)	0.346 ± 0.0180	0.331 ± 0.0038
μ max2 (h^-1)	0.300 ± 0.0215	0.118 ± 0.0108
KN 2 (g/L)	0.0012 ± 0.00001	0.020 ± 0.0053
Nmin 2 (g/L)	0.022 ± 0.0018	0.035 ± 0.0159
KiLA (g/L)	0.029 ± 0.0043	0.055 ± 0.0064
KiAA (g/L)	NS	NS
KiEtOH (g/L)	NS	NS
KiB (g/L)	NS	NS
RX ^2	0.9977	0.9980
RPDMX	2.5779	3.8516
α LA (dimensionless)	1.371 ± 0.2090	0.075 ± 0.0027
β LA (h^-1)	0.013 ± 0.0092	0.040 ± 0.0014
RLA ^2	0.9953	0.9978
RPDMLA	3.049	8.661

Statistically significant coefficients (𝑃<.05) are expressed as means ± standard errors, NS: no significant (𝑃>.05).