Table 1.
Characteristics of substrates and inoculum used in this study.
| Parameters | Unit | PM | FLF | Inoculum |
|---|---|---|---|---|
| pH | - | 6.3 | 3.5 | 7.8 |
| Total solid | % | 4.17 | 14.38 | 1.77 |
| Volatile solid | % | 1.54 | 13.71 | 1.17 |
| TN | (mg·L−1) | 3665 | 2230 | 3807 |
| TC | (mg·L−1) | 15,600 | 38,592 | 3705 |
| DOC | (mg·L−1) | 15,570 | 38,563 | 2240 |
| C/N ratio | - | 5.2 | 19.7 | 6.6 |
| NH3 | (mg·L−1) | 3.6 | 0 | 94.8 |
| NH4+ | (mg·L−1) | 2260 | 130 | 1955 |
| Acetate | (mg·L−1) | 4078 | 2472 | 220.86 |
| Propionate | (mg·L−1) | 1880 | 386 | 0 |
| Butyrate | (mg·L−1) | 0 | 69.6 | 0 |
| Valerate | (mg·L−1) | 0 | 66.2 | 0 |
PM: pig manure. FLF: fermented liquid feed; TN: total nitrogen; TC: total carbon; DOC: dissolved organic carbon.