Table 2.

Results of Plackett–Burman design matrix for evaluating factors

Run	A	B	C	D	E	F	G	aYs (g/L)
1	− 1	1	1	1	− 1	1	1	6.75 ± 0.21
2	1	1	1	− 1	1	1	− 1	5.20 ± 0.13
3	− 1	− 1	− 1	1	1	1	− 1	5.46 ± 0.21
4	1	1	− 1	1	− 1	− 1	− 1	3.43 ± 0.23
5	− 1	1	− 1	− 1	− 1	1	1	6.66 ± 0.30
6	1	− 1	1	1	− 1	1	− 1	2.00 ± 0.14
7	− 1	− 1	1	1	1	− 1	1	5.53 ± 0.17
8	1	1	− 1	1	1	− 1	1	5.35 ± 0.08
9	− 1	− 1	− 1	− 1	− 1	− 1	− 1	5.14 ± 0.20
10	1	− 1	− 1	− 1	1	1	1	3.60 ± 0.18
11	1	− 1	1	− 1	− 1	− 1	1	1.03 ± 0.04
12	− 1	1	1	− 1	1	− 1	− 1	6.98 ± 0.29

^aYs represents average ethanol production of triplicate experiments