Enhancement of 2,3-Butanediol Production by Klebsiella oxytoca PTCC 1402
Table 4
The estimated interaction of severity index for different parameters.
Interacting factors
Column*
SI (%)●
Col.♠
Opt.○
Mixing intensity * inoculum
(f * g)
53.31
15
(2,3)
Glucose * inoculum
(a * g)
49.90
10
(2,1)
Acetic acid * mixing intensity
(b * f)
40.23
4
(2,1)
Temperature * mixing intensity
(e * f)
37.70
1
(3,2)
Glucose * pH
(a * d)
37.16
7
(2,3)
Succinic acid * mixing intensity
(c * f)
33.24
3
(2,2)
Acetic acid * temperature
(b * e)
30.56
5
(2,2)
pH * inoculum
(d * g)
29.35
13
(1,3)
Succinic acid * pH
(c * d)
27.40
1
(2,3)
Glucose * mixing intensity
(a * f)
26.09
5
(2,1)
Temperature * inoculum
(e * g)
25.44
14
(3,1)
Acetic acid * inoculum
(b * g)
17.74
11
(2,3)
pH * mixing intensity
(d * f)
17.53
2
(1,2)
Acetic acid * succinic acid
(b * c)
13.53
7
(2,2)
Succinic acid * temperature
(c * e)
10.32
2
(2,3)
Glucose * acetic acid
(a * b)
8.45
1
(2,2)
Succinic acid * inoculum
(c * g)
8.40
12
(2,1)
Acetic acid * pH
(b * d)
7.82
6
(2,3)
Glucose * succinic acid
(b * c)
4.56
6
(2,2)
pH * temperature
(d * e)
3.65
3
(1,3)
Glucose * temperature
(a * e)
1.53
4
(2,3)
*Columns represent the column locations to which the interacting factors are assigned. ●SI: interaction severity index (100% for 90° angle between the lines, 0% for parallel lines). ♠Col. Shows the column that should be reserved if this interaction effect were to be studied (2-L factors only). ○Opt. indicates the factor levels desirable for the optimum conditions (based strictly on the first two levels).
