Enhancement of 2,3-Butanediol Production by Klebsiella oxytoca PTCC 1402

Table 1

The selected fermentation factors and their assigned levels.

No.	Factor	Level 1	Level 2	Level 3
a	Glucose (% w/v)	3.0	6.0	9.0
b	Acetic acid (% w/v)	0.1	0.5	1.0
c	Succinic acid (% w/v)	0.5	1.0	1.5
d	pH	6.1	6.8	7.5
e	Temperature (°C)	28	32	37
f	Mixing intensity (rpm)	120	150	180
g	Inoculum size (g/L)	2	5	8