Table 4. Average values of influent and effluent TKN concentrations (mg Kjeldahl-N l-1) and removal efficiencies (%) in the GCC and UASB reactors. |
|
Phase |
Influent |
Effluent |
Removal efficiency |
GCC |
I (n = 8) |
45 ± 2 |
21 ± 3 |
55 ± 6 |
II (n = 12) |
51 ± 3 |
22 ± 4 |
57 ± 9 |
|
III (n = 12) |
55 ± 2 |
24 ± 2 |
57 ± 4 |
|
IV (n = 13) |
50 ± 3 |
21 ± 4 |
57 ± 9 |
|
Average (n = 45) |
51 ± 4 |
22 ± 3 |
57 ± 7 |
|
UASB |
I (n = 8) |
45 ± 2 |
40 ± 2 |
10 ± 4 |
II (n = 12) |
51 ± 3 |
45 ± 3 |
12 ± 4 |
|
III (n = 12) |
55 ± 2 |
47 ± 6 |
16 ± 9 |
|
IV (n = 13) |
50 ± 3 |
36 ± 3 |
26 ± 7 |
|
Average (n = 45) |
51 ± 4 |
42 ± 6 |
17 ± 9 |
|
|