Table 5.
Summary of literature studies of the in situ biogas upgrading technology associated with H2 injection.
| Substrate | Reactor type | Reactor volume (L) | OLR (gVS∙L−1∙d−1) | T (°C) | pH | HRT (d) | H2 (LH2∙L−1∙d−1) | H2/CO2 | H2 conversion (%) | CO2 removal (%) | CH4 (%) | Ref. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Potato starch | UASB | 1.4 | 2.79 | 55 | 8.4 | 7 | 3.5 | 4 : 1 | 67 | 76 | 82 | Bassani et al. [48] |
| Cattle manure | CSTR | 0.6 | 1.85 | 55 | 8.3 | 14 | 1.8 | 4 : 1 | >90 | N/D | 65 | Luo et al. [13] |
| Cattle manure and cheese whey | CSTR | 0.6 | 1.66 | 55 | 7.7-7.9 | 15 | 1.5-1.7 | 4 : 1 | N/D | 85 | 75 | Luo and Angelidaki [49] |
| Cattle manure and cheese whey | CSTR | 0.6 | 1.66 | 55 | 7.6-8.3 | 15 | 0.9-1.8 | 4 : 1 | N/D | 53-91 | 78-96 | Luo and Angelidaki, [16] |
| Sewage sludge | CSTR | 3 | 1,08 | 37 | 8.0 | 10 | 0.6-1.3 | 4 : 1 | 96 | 99 | 99 | Wang et al. [33] |
| Sewage sludge | Batch | 2 | 0.77 | 38 | 7.9-8.4 | 20 | 0.3-1.7 | 2 : 1-10 : 1 | 58-99 | 43-100 | 79-92 | Agneessens et al. [19] |
| Sewage sludge | Semicontinuous | 2.4 | 1-1.12 | 35 | 7.0-7.4 | 15 | 0, 0.62-0.2 | 1 : 1-4 : 1 | 96-100 | 13-49 | 80 | Corbellini et al. [21] |
| Sewage sludge | CSTR | 16 | 1.5 | 36.7 | 7.4 | 22 | 0.4-5.5 | 0-7 : 1 | 94-99 | 96.5 | 90.3 | This study |
CSTR: continuous stirred tank reactors; HRT: hydraulic retention time; OLR: organic loading rate; UASB: upflow anaerobic sludge blanket.