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Table 3

Characteristics of inflow from the wetland units

Wetland units	D-BVFCW	C-BVFCW
COD (mg/L)	41.86 ± 0.69	41.86 ± 0.69
TN (mg/L)	4.63 ± 1.32	4.63 ± 1.32
NH₄⁺-N (mg/L)	2.19 ± 0.25	2.19 ± 0.25
TP (mg/L)	0.44 ± 0.02	0.44 ± 0.02
pH	6.5–7.5	6.5–7.5
SO₄²⁻ (mg/L)	5.52 ± 0.91	5.52 ± 0.91
The water temperature (°C)	20 ± 2	20 ± 2
^aEC (μS/cm)	453 ± 27	453 ± 27

Wetland units	D-BVFCW	C-BVFCW
COD (mg/L)	41.86 ± 0.69	41.86 ± 0.69
TN (mg/L)	4.63 ± 1.32	4.63 ± 1.32
NH₄⁺-N (mg/L)	2.19 ± 0.25	2.19 ± 0.25
TP (mg/L)	0.44 ± 0.02	0.44 ± 0.02
pH	6.5–7.5	6.5–7.5
SO₄²⁻ (mg/L)	5.52 ± 0.91	5.52 ± 0.91
The water temperature (°C)	20 ± 2	20 ± 2
^aEC (μS/cm)	453 ± 27	453 ± 27

^aElectrical conductivity.