System 1 | System 2 | ||||
---|---|---|---|---|---|
Parameter | Vinasse (diluted 7% v/v) | UASB effluent | Vinasse (diluted 10% v/v) | Fluidized bed bioreactor effluent | UASB effluent |
COD | 7,704 ± 800 | 4,000 ± 570a | 11,000 ± 1,000 | 7,000 ± 93 | 3,940 ± 42a |
Phenolic compounds | 758 ± 100 | 840 ± 42a | 1,083 ± 150 | 460 ± 40 | 519 ± 10b |
Color* | 0.10 ± .001 | 0.11 ± 0.003a | 0.13 ± 0.012 | 0.13 ± 0.003 | 0.14 ± 0.005b |
SO4 2- | 371 ± 90 | 200 ± 56a | 530 ± 141 | 540 ± 50 | 70 ± 40b |
TN | 120 ± 15 | 723 ± 52a | 172 ± 21 | 688 ± 79 | 408 ± 91b |
N-NH3 | 5 ± 0.6 | 57 ± 1a | 7 ± 1 | 5 ± 0.7 | 31 ± 4b |
PO4 3- | 29 ± 5 | 49 ± 6a | 41 ± 7 | 22 ± 2 | 46 ± 7a |
Biogas production** | - | 2,370 ± 149a | - | - | 1,102 ± 83b |
Methane content*** | - | 65 ± 5a | - | - | 74 ± 6b |