Table 2 Comparison of methane yield in different reactors treating BSG and PM
From: An integrated approach for efficient biomethane production from solid bio-wastes in a compact system
Substrate | Reactor type | Operational time (days) | OLR a (kgCOD•m −3 •day −1 ) | OLR a (kgODM•m −3 •day −1 ) | Methane yield (L•kgCOD −1 ) | Methane yield (L•kgODM −1 ) | Methane production rate (mL•L −1 •day −1 ) | HRT (days) | Soluble COD removal (%) |
|---|---|---|---|---|---|---|---|---|---|
BSG | |||||||||
Raw BSG | CSTR (5.0Â L) | 120 | 4.0 | 3.0 | 153 | 205 | 617 | 15.0 | N.A.b |
Suspended BSGc | CSTR (5.0Â L) | 120 | 5.3 | 4.0 | 150 | 258 | 802 | 15.0 | N.A. |
BSG hydrolysates | CSTR (5.0Â L) | 120 | 6.3 | 4.5 | 196 | 295 | 1,224 | 10.0 | 82 |
BSG hydrolysates | SBR (5.0Â L) | 80 | 7.9 | 5.6 | 193 | 292 | 1,521 | 12.1 | 89 |
BSG hydrolysates | One-stage EGSB (3.8Â L) | 80 | 11.5 | N.D.d | 260 | N.D. | 3,079 | 2.5 | 88 |
BSG hydrolysates | Two-stage EGSB (3.8Â L) | 120 | 19.0 | N.D. | 253 | N.D. | 4,864 | 1.5 | 87 |
PM | |||||||||
PM hydrolysates | SBR (5.0Â L) | 80 | 3.0 | 3.3 | 83 | 140 | 249 | 12.0 | 91 |
PM hydrolysates | EGSB (3.8Â L) | 280 | 21.0 | N.D. | 275 | N.D. | 5,456 | 1.5 | 93 |