Table 1.
Operation settings of MABR 1–4. The column “Removal of detached biofilm” refers to the removal of suspended biomass from the recirculation line; “not executed” means that the removal of suspended biomass happened only via the effluent; else, the period between cleaning the sieve in the recirculation line is given. MABR 3 and 4 have not been operating from day 0–183, thus no values are given for this phase.
| Reactor | Aeration Regime | Removal of detached biofilm | Phase |
HRT |
N Surface load |
sCOD Surface load |
|---|---|---|---|---|---|---|
| [d] | [d] | [g–NH4–N m−2 d−1] | [g-O2 m−2 d−1] | |||
| MABR 1 | Intermittent | not executed | 0–183 | ∼0.5 | 1.6–6 | 1.7–13.3 |
| 183–360 | 0.3–1.2 | ∼2 | 0.4–7.3 | |||
| MABR 2 | Continuous | not executed | 0–183 | ∼0.5 | 1.6–6 | 1.7–13.3 |
| 183–360 | 0.3–1.2 | ∼2 | 0.4–7.3 | |||
| MABR 3 | Intermittent | not executed | 0–183 | – | – | – |
| 183–360 | 0.3–1.2 | ∼2 | 0.4–7.3 | |||
| MABR 4 | Intermittent | 1–3 d | 0–183 | – | – | – |
| 183–360 | 0.3–1.2 | ∼2 | 0.4–7.3 | |||