Table 4 Parameter changes before and after AD.
From: Nanoparticles for improving biogas production and effluent biofertilizer
Parameters | Group | ||||
|---|---|---|---|---|---|
Cow manure | Fe + Ni + Co | Fe + Ni | Fe + Co | Ni + Co | |
Initial pH | 6.70 ± 0.03 | 6.70 ± 0.03 | 6.70 ± 0.03 | 6.70 ± 0.03 | 6.70 ± 0.03 |
Final pH | 7.20 ± 0.01 | 7.50 ± 0.02 | 7.40 ± 0.03 | 7.30 ± 0.01 | 7.20 ± 0.02 |
Initial VFAs (mg/LCaCo3) | 4875 ± 36 | 4875 ± 36 | 4875 ± 36 | 4875 ± 36 | 4875 ± 36 |
Final VFAs (mg/LCaCo3) | 3200 ± 40 | 2800 ± 45 | 2820 ± 62 | 3000 ± 50 | 3050 ± 44 |
VFAs removal rate (%) | 52.34 ± 0.7 | 74.10 ± 0.5 | 72.87 ± 0.6 | 62.50 ± 0.7 | 59.83 ± 0.8 |
Initial TS (%) | 9.20 ± 0.11 | 9.20 ± 0.11 | 9.20 ± 0.11 | 9.20 ± 0.11 | 9.20 ± 0.11 |
Final TS | 7.50 ± 0.08 | 6.50 ± 0.09 | 6.80 ± 0.09 | 7.00 ± 0.09 | 7.20 ± 0.08 |
TS removal rate (%) | 22.66 ± 0.37 | 41.53 ± 0.22 | 35.29 ± 0.22 | 31.42 ± 0.22 | 27.77 ± 0.37 |
Initial VS | 77.40 ± 1.90 | 77.40 ± 1.90 | 77.40 ± 1.90 | 77.40 ± 1.90 | 77.40 ± 1.90 |
Final VS | 69.76 ± 1.71 | 64.21 ± 1.63 | 65.02 ± 1.65 | 66.21 ± 1.58 | 67.70 ± 1.75 |
VS removal rate (%) | 10.95 ± 0.26 | 20.54 ± 0.42 | 19.04 ± 0.38 | 16.90 ± 0.55 | ± 0.10 |
