Comparative Study of Various E. coli Strains for Biohydrogen Production Applying Response Surface Methodology

Table 2

The 3² experimental design matrix for evaluating data.

Run	pH	Formate conc. (g/L)	Yield (mol H2/mol formate)
			XL1-BLUE	DJT 135
1	6	0	0	0
2	6	0.9	0.35	0.53
3	6	1.8	0.34	0.5
4	6.5	0	0	0
5	6.5	0.9	0.39	0.59
6	6.5	1.8	0.36	0.54
7	7	0	0	0
8	7	0.9	0.34	0.51
9	7	1.8	0.3	0.48
10	6.5	0.9	0.38	0.58
11	6.5	0.9	0.37	0.58
12	6.5	0.9	0.37	0.59