Feedstock | System | Hydrolysis reactor | Methanogenic reactor | Two-stage | References | ||||
---|---|---|---|---|---|---|---|---|---|
OLR kg VS (m3d)−1 | % TS | % VS | SRT (d) | HRT (d) | Methane yield m3 (kg VSremoved)−1 | VS removal  % | |||
Vegetable waste | CSTR-AFBR | 0.15 | 5.4 ± 0.6 | 4.9 ± 0.6 | 48 | 8 | 0.29 ± 0.01 | 91.0 ± 1.2 | [49] |
0.1 | 43 | 0.33 ± 0.02 | 91.1 ± 2.4 | ||||||
0.17 | 44 | 0.33 ± 0.03 | 90.9 ± 2.8 | ||||||
0.23 | 45 | 0.31 ± 0.05 | 77.2 ± 1.8 | ||||||
Fruit and vegetable waste | CSTR–CSTR | 7.0 | 12.7 ± 0.9 | 11.0 ± 0.8 | 25 | 5 | 0.3 | 97.5 | [50] |
Tannery solid waste | CSTR–CSTR | 1.05 ± 0.05 | 7.04 | 2.82 | 10 | 20 | 0.31 | 67 | [51] |
Activated sludge (84 %) + organic waste (16 %) | CSTR–CSTR | 19.9 | 9.8 | N.D. | 28 | 8 | 0.24 | 71.3 | [60] |
Onion waste | SBR-AMBR | 0.5 | 7.4 | 7.11 | 14 | 3 | 0.29 | N.A. | [17] |
1 | 3 | 0.32 | N.A. | ||||||
2 | 3 | 0.31 | N.A. | ||||||
Tomato | LBAR-UASB | 6.7 | 10 | 7.6 | 31 | N.A. | 0.04 | 47 | [61] |
Cucumber | 1.6 | 6.8 | 4.5 | 0.07 | 54 | ||||
Common reed | 15.2 | 44.3 | 41 | 0.011 | 7.7 | ||||
Grass silage | 14.5 | 41 | 39 | 0.011 | 31.6 | ||||
Blue mussel | LBAR-UASB | 0.5 | 41.2 | 7.7 | 44 | N.A. | 0.33 | N.A. | [62] |
Red mussel | 0.5 | 81.9 | 76.3 | 107 | 0.22 | N.A. | |||
Vinegar residue + sludge pretreated with HCl | CSTR–CSTR | 2.6 | 30.8 | 24.7 | N.A | N.A. | 0.192 | N.A. | [52] |
Sewage, pretreated with H2SO4 | CSTR–CSTR | 1.4 | N.A. | N.A. | 20 | N.A. | 0.45 | 59.6 | [53] |
Onion waste, pretreated with H2SO4 | HPR2-UASB | 2.7 | 8.65 ± 0.29 | 6.83 ± 0.23 | 30 | 12 | 0.43 ± 0.06 | 83.5 ± 9.8 | This study |