Table 1 Factors and levels for the stirred flasks experiments

A

Olive oil

10 g/L

20 g/L

B

Yeast extract

3.0 g/L

5 g/L

C

KH₂PO₄

1.0 g/L

2 g/L

D

MgSO₄·7H₂O

1.4 g/L

2 g/L

E

NaCl

1.0 g/L

2 g/L

F

CaCl₂

0.8 g/L

2 g/L

G

Trace elements solution^a

2.0 mL

4 mL