Table 1 - Improved growth model for two-stage continuous cultures of Lactobacillus helveticus

Table 1. Growth and production parameter values considered in both stages for calculations.

s₀^a

V_i^a

D_i^a

p₀^d

V_c^a

pH_c^a

Y_P/S^d

s_lim^d

[HL]_inh^e

(g L^-1)

(L)

(h^-1)

(g L^-1)

(h^-1)

(g L^-1)

(L)

(g L^-1)

(h^-1)

(-)

(g L^-1)

0.12

0.083

1.4

1.54

0.68

8.0

0.80

4.7

0.72

5.9

0.9

8.5

a) the parameter values are given in Materials and Methods.
b) calculated values for biomass and product concentrations at steady state in the first stage (Bouguettoucha et al. 2009).
c) the parameter values were taken from previous batch cultures of L. helveticus carried out on the same medium in similar physico-chemical conditions (Bouguettoucha et al. 2009).
d) the initial lactic acid concentration was neglected.
e) the inhibitory concentration of undissociated lactic acid (Bouguettoucha et al. 2008).

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