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. 2019 Dec 28;6(1):e03088. doi: 10.1016/j.heliyon.2019.e03088

Figure 2.

Figure 2

Profiles of NH4+-N, NO3--N, DO and pH during a typical AUR test (example of a test carried out at 1.0 g TSS/L). The slope of the linear fitting of NH4+-N data represents the ammonium removal rate.