Figure 2: Measured and simulated effluent COD data in Nitritation reactors I and II.

Case 1: DO = 0.5 mg O₂/L in Nitritation reactor I; Case 2: DO = 1.0 mg O₂/L in Nitritation reactor I; Case 3: DO = 3.0 mg O₂/L in Nitritation reactor I; Case 4; Data on 16 March 2011 in Nitritation reactor II; Case 5: Data on 21 March 2011 in Nitritation reactor II.