Table 3 Biogas and energy yield (EY) in each run of two-stage hydrogen and methane productions
Run | Yield (mL/g-VS) | EY (kJ/g-VS) | ||||
|---|---|---|---|---|---|---|
H2 | CH4 | Total | H2 | CH4 | Total | |
1 | 112.0 | 241.6 | 353.6 | 1.2 | 8.7 | 9.9 |
2 | 101.6 | 346.7 | 448.3 | 1.1 | 12.4 | 13.5 |
3 | 122.7 | 254.4 | 377.1 | 1.3 | 9.1 | 10.5 |
4 | 60.9 | 262.7 | 323.6 | 0.7 | 9.4 | 10.1 |
5 | 122.7 | 258.9 | 381.6 | 1.3 | 9.3 | 10.6 |
6 | 123.5 | 329.6 | 453.1 | 1.3 | 11.8 | 13.2 |
7 | 18.2 | 199.2 | 217.4 | 0.2 | 7.1 | 7.3 |
8 | 183 | 327.3 | 510.3 | 2.0 | 11.7 | 13.7 |
9 | 81.5 | 276.1 | 357.6 | 0.9 | 9.9 | 10.8 |
10 | 10.8 | 225.0 | 235.8 | 0.1 | 8.1 | 8.2 |
11 | 98.2 | 290.4 | 388.6 | 1.1 | 10.4 | 11.5 |
12 | 0.4 | 115.3 | 115.7 | 0.0 | 4.1 | 4.1 |
13 | 0.5 | 127.1 | 127.6 | 0.0 | 4.6 | 4.6 |
14 | 72.1 | 312.3 | 384.4 | 0.8 | 11.2 | 12.0 |
15 | 113.2 | 259.7 | 372.9 | 1.2 | 9.3 | 10.5 |
16 | 82.3 | 271.8 | 354.1 | 0.9 | 9.7 | 10.6 |
17 | 18.3 | 194.4 | 212.7 | 0.2 | 7.0 | 7.2 |
18 | 113.3 | 252.4 | 365.7 | 1.2 | 9.1 | 10.3 |
19 | 111.5 | 276.7 | 388.2 | 1.2 | 9.9 | 11.1 |
Optimum proportions | 207.7 | 321.1 | 528.8 | 2.3 | 11.5 | 13.8 |