Table 1 Effect of ammonium acetate concentration on characteristics of anaerobic digestion
Group | Different period (days) | Average daily total biogas production (mL) | Average daily CH 4 concentration (%) | NH 4 + (g/L) | Volatile fatty acids (g/L) |
|---|---|---|---|---|---|
L | 10 | 1,837.0 ± 46.4 | 61.66 ± 1.56 | 1.47 | 2.44 |
25 | 1,767.5 ± 48.3 | 61.14 ± 2.38 | 1.86 | 4.88 | |
51 | 1,880.4 ± 37.9 | 59.11 ± 1.62 | 1.97 | 8.00 | |
M | 10 | 1,757.3 ± 54.1 | 63.38 ± 1.52 | 1.27 | 2.83 |
25 | 1,708.5 ± 37.1 | 61.80 ± 2.17 | 2.73 | 5.69 | |
51 | 1,586.4 ± 40.8 | 54.53 ± 2.08 | 3.22 | 8.70 | |
H | 10 | 1,710.5 ± 56.3 | 64.39 ± 1.81 | 1.48 | 3.80 |
25 | 1,586.5 ± 43.6 | 61.39 ± 1.69 | 3.35 | 9.69 | |
51 | 1,266.9 ± 49.6 | 45.86 ± 1.96 | 5.97 | 15.44 | |
Blank | 10 | 1,678.0 ± 42.4 | 52.42 ± 1.66 | 0.15 | 3.63 |
25 | 1,778.3 ± 53.1 | 56.65 ± 2.20 | 0.12 | 6.44 | |
51 | 1,256.8 ± 51.6 | 47.08 ± 2.12 | 0.27 | 9.55 |