Table 3 Specific methane yield, electrical conductivity, and VS removal rate of digestate from different experimental reactors
Phase | Control | RI | BA | |||
|---|---|---|---|---|---|---|
VS removal efficiency (%) | SMY (NL g−1 VS) | VS removal efficiency (%) | SMY (NL g−1 VS) | VS removal efficiency (%) | SMY (NL g−1 VS) | |
1 | 53 ± 5 | 0.53 ± 1.10 × 10–2 | 49 ± 8 | 0.65 ± 0.07 | 51 ± 4 | 0.56 ± 0.01 |
2 | 34 ± 5 | 0.21 ± 5.10 × 10–2 | 58 ± 3 | 0.31 ± 0.02 | 65 ± 5 | 0.49 ± 0.04 |
3 | 35 ± 8 | 0.03 ± 0.70 × 10–2 | 66 ± 3 | 0.28 ± 0.01 | 71 ± 5 | 0.56 ± 0.04 |
4 | 42 ± 3 | 0.02 ± 1.10 × 10–2 | 63 ± 2 | 0.13 ± 0.01 | 78 ± 1 | 0.27 ± 0.01 |
5 | 47 ± 6 | 0.02 ± 0.30 × 10–2 | 65 ± 3 | 0.09 ± 0.01 | 68 ± 8 | 0.44 ± 0.05 |
6 | 46 ± 1 | 0.02 ± 0.60 × 10–2 | 62 ± 1 | 1.40 × 10–2 ± 0.50 × 10–2 | 68 ± 2 | 0.24 ± 0.20 × 10–2 |
7 | 45 ± 7 | 0.90 × 10–2 ± 5.92 × 10–2 | 57 ± 4 | 0.01 ± 0.20 × 10–2 | 66 ± 3 | 0.24 ± 0.03 |
8 | 28 ± 4 | 0.70 × 10–2 ± 0.20 × 10–2 | 49 ± 1 | 0.70 × 10–2 ± 0.20 × 10–2 | 61 ± 2 | 0.13 ± 0.01 |
9 | 41 ± 5 | 0.01 ± 0.20 × 10–2 | 35 ± 8 | 0.40 × 10–2 ± 0.20 × 10–2 | 61 ± 3 | 0.12 ± 0.80 × 10–2 |
10 | 42 ± 3 | 0.20 × 10–2 ± 6.92 × 10–4 | 52 ± 5 | 0.20 × 10–2 ± 3.63 × 10–4 | 56 ± 8 | 0.17 ± 0.02 |