Mean values of pH and influent of sulfate, COD and analytes in DFSBR
Phases . | I (41 d) . | II (18 d) . | III (71 d) . | IV (45 d) . | |
---|---|---|---|---|---|
Sulfate (mg·L−1) | 980 ± 180 | 1,150 ± 71 | 1,020 ± 70 | 985 ± 144 | |
COD (mg·L−1) | 1,530 ± 556 | 2,000 ± 111 | 1,980 ± 519 | 1,770 ± 450 | |
COD:Sulfate ratio | 1.5 ± 0.4 | 1.7 ± 0.2 | 2.1 ± 0.7 | 1.8 ± 0.5 | |
Influent pH | 6.9 ± 0.6 | 5.4 ± 0.2 | 5.1 ± 0.1 | 4.6 ± 0.2 | |
Influent (mg·L−1) of: | Al | – | 25 ± 11 | 71 ± 27 | 96 ± 18 |
Fe | – | 8 ± 4 | 11 ± 8 | 6 ± 2 | |
Mn | – | 15 ± 2 | 31 ± 2 | 62 ± 5 | |
Si | – | 8 ± 3 | 12 ± 5 | 11 ± 2 | |
La | – | 8 ± 4 | 18 ± 6 | 29 ± 10 | |
Ce | – | 6 ± 3 | 14 ± 6 | 18 ± 6 | |
Pr | – | 0.4 ± 0.3 | 1.0 ± 0.4 | 3.0 ± 0.4 | |
Nd | – | 2 ± 1 | 5 ± 2 | 7 ± 3 | |
Sm | – | 0.2 ± 0.1 | 0.6 ± 0.3 | 0.8 ± 0.3 | |
Y | – | 0.8 ± 0.5 | 2.0 ± 0.7 | 3.2 ± 0.4 | |
U | – | 1.1 ± 0.6 | 3.7 ± 2 | 3.2 ± 1.4 |
Phases . | I (41 d) . | II (18 d) . | III (71 d) . | IV (45 d) . | |
---|---|---|---|---|---|
Sulfate (mg·L−1) | 980 ± 180 | 1,150 ± 71 | 1,020 ± 70 | 985 ± 144 | |
COD (mg·L−1) | 1,530 ± 556 | 2,000 ± 111 | 1,980 ± 519 | 1,770 ± 450 | |
COD:Sulfate ratio | 1.5 ± 0.4 | 1.7 ± 0.2 | 2.1 ± 0.7 | 1.8 ± 0.5 | |
Influent pH | 6.9 ± 0.6 | 5.4 ± 0.2 | 5.1 ± 0.1 | 4.6 ± 0.2 | |
Influent (mg·L−1) of: | Al | – | 25 ± 11 | 71 ± 27 | 96 ± 18 |
Fe | – | 8 ± 4 | 11 ± 8 | 6 ± 2 | |
Mn | – | 15 ± 2 | 31 ± 2 | 62 ± 5 | |
Si | – | 8 ± 3 | 12 ± 5 | 11 ± 2 | |
La | – | 8 ± 4 | 18 ± 6 | 29 ± 10 | |
Ce | – | 6 ± 3 | 14 ± 6 | 18 ± 6 | |
Pr | – | 0.4 ± 0.3 | 1.0 ± 0.4 | 3.0 ± 0.4 | |
Nd | – | 2 ± 1 | 5 ± 2 | 7 ± 3 | |
Sm | – | 0.2 ± 0.1 | 0.6 ± 0.3 | 0.8 ± 0.3 | |
Y | – | 0.8 ± 0.5 | 2.0 ± 0.7 | 3.2 ± 0.4 | |
U | – | 1.1 ± 0.6 | 3.7 ± 2 | 3.2 ± 1.4 |