0.7-d HRT†   1.2-d HRT   1.9-d HRT   %Removal (± standard deviation)   Nitrogen   70.8a‡ ± 9.8 (n§=13)   71.8a ±10.8 (n=16)   69.9a ± 11.4 (n=14)   Phosphorus   10.0a ± 3.97 (n=13)   7.7a ± 24.0 (n=15)   -1.7a ± 22.0 (n=14)   Prodiamine   57.9a ± 5.3  (n=3)   48.9a ± 27.7 (n=7)   64.8a ± 5.6 (n=5) †HRT = hydraulic retention time ‡Values followed by the same letter within a row are not different according to Tukey’s mean separation test at the 5% level §n = number of samples

Table 3: Mean nitrogen, phosphorus and prodiamine removals in the constructed wetland.