The total amount of nitrogen removed during treatment (DN) as well as the nitrogen removal efficiency is provided.
a–c The ranges indicated with another superscript are significantly different from each other (based on average ±standard deviation) according to a One-way ANOVA with Tamhane’s T2 post-hoc multiple comparison test (p < 0.05). d–f The ranges indicated with another superscript are significantly different from each other (based on average ± standard deviation) according to a One-way ANOVA with Tuckey’s post-hoc multiple comparison test (p < 0.05).