Nitrogen and phosphorus removal paths in a sequencing batch reactor –dependence on a dissolved oxygen profile in aerobic phases

The main objective of the research was to assess nitrogen and phosphorus removal paths in a sequencing batch reactor operating at a DO setpoint of 1 mg O2 l−1. During the experiment, it was noted that, despite providing automatic control of DO and comparable operational parameters of the SBR, the DO concentration profile (over time) varied. It was assumed that this could have an impact on nitrogen and phosphorus removal paths.Therefore, the problem was analyzed in this study.