Table 1: Characteristics of the influent and effluent of CWs treating mariculture wastewater under different TAN concentrations.

ParametersTAN (mg/L)NO2-N (mg/L)NO3-N (mg/L)PO43−-P (mg/L)pHT (°C)

Final effluent
 L0.020 ± 0.001a0.008 ± 0.002a1.348 ± 0.331a0.420 ± 0.005a7.8819.9
 M0.773 ± 0.178b0.006 ± 0.003a1.145 ± 0.074a0.398 ± 0.008a7.7219.9
 H3.510 ± 0.479c0.013 ± 0.002b0.675 ± 0.035b0.356 ± 0.026b7.6219.8
Final variation
 L−0.028 ± 0.001a−0.187 ± 0.002a−1.462 ± 0.331a−0.008 ± 0.005+0.04+0.3
 M−0.323 ± 0.178b−0.008 ± 0.003b−1.210 ± 0.074a−0.033 ± 0.008+0.03+0.5
 H−1.247 ± 0.479c−0.005 ± 0.002b−0.285 ± 0.035b−0.026 ± 0.026+0.10+0.4
Removal rate (%)
 L58.51 ± 2.13a96.07 ± 1.04a52.03 ± 11.77a1.87 ± 0.012
 M29.46 ± 16.21b59.26 ± 19.25b51.38 ± 3.13a8.20 ± 0.019
 H26.21 ± 10.07b27.93 ± 10.92c29.69 ± 3.65b6.88 ± 0.068

Final variation = effluent concentration − influent concentration; removal rate = ((effluent concentration − influent concentration)/influent concentration) × 100%. L: low influent TAN concentration group (0.75 mg/L); M: middle influent TAN concentration group (2.31 mg/L); H: high influent TAN concentration group (7.23 mg/L). Differences in the final effluent and removal rate among the groups were tested using one-way ANOVA. Different characters indicate significant differences () (means ± SD, ).