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Table 1 Plackett burman design for screening of factors

From: Design and optimization of ethanol production from bagasse pith hydrolysate by a thermotolerant yeast Kluyveromyces sp. IIPE453 using response surface methodology

Serial

Run order

pH

Inoculum volume (%v/v)

Substrate conc. (g/L)

Yeast extract (g/L)

MgSO4(g/L)

(NH4)2SO4(g/L)

Na2HPO4(g/L)

KH2PO4(g/L)

Fermentation time (h)

Response variable ethanol conc. (g/L)

           

Experimental

Model predicted

1

1

+1

+1

-1

+1

+1

+1

-1

-1

-1

7.20

6.91

2

6

-1

-1

-1

+1

-1

+1

+1

-1

+1

8.05

8.14

3

3

+1

-1

+1

+1

-1

+1

+1

+1

-1

7.18

7.18

4

2

-1

+1

+1

-1

+1

+1

+1

-1

-1

8.07

8.35

5

4

-1

+1

-1

+1

+1

-1

+1

+1

+1

7.86

7.76

6

10

-1

+1

+1

+1

-1

-1

-1

+1

-1

9.03

9.13

7

11

+1

-1

+1

+1

+1

-1

-1

-1

+1

10.09

10.37

8

8

+1

+1

-1

-1

-1

+1

-1

+1

+1

8.05

8.33

9

9

+1

+1

+1

-1

-1

-1

+1

-1

+1

7.30

7.02

10

12

-1

-1

-1

-1

-1

-1

-1

-1

-1

8.20

8.10

11

5

-1

-1

+1

-1

+1

+1

-1

+1

+1

13.40

13.12

12

7

+1

-1

-1

-1

+1

-1

+1

+1

-1

5.60

5.69