Parameters

Influent

Pretreatment

First filter (FV1)

Second filter (FV2)

FV1a

FV1b

FV1c

FV2a

FV2b

T (˚C)

26.3 ± 1.5

27.1 ± 0.8

27.8 ± 0.9

27.2 ± 1.1

27.1 ± 1.4

26.1 ± 0.6

26.2 ± 0.5

EC (mS/cm)

1331 ± 170

1420 ± 129

1179 ± 91

1314 ± 132

1191 ± 94

888.0 ± 301

1061 ± 122

pH

7.7 ± 0.2

7.5 ± 0.1

7.8 ± 0.2

8.3 ± 0.1

8.1 ± 0.1

5.7 ± 0.4

5.8 ± 0.4

SS (mg/L)

718.9 ± 291

388.8 ± 59

59.7 ± 31

64.0 ± 14

49.5 ± 11

11.9 ± 4.2

13.7 ± 4.3

BOD5 (mg/L)

655.6 ± 106

495.5 ± 85

107.9 ± 68

113.4 ± 57

81.0 ± 32

2.4 ± 1.6

2.3 ± 1.7

COD (mg/L)

1240 ± 589

1063 ± 293

239.2 ± 58

268,7 ± 83

188.5 ± 31

94.0 ± 36

82.2 ± 39

N-TN (mg/L)

188 ± 82

138.2 ± 29

68.2 ± 17

73.0 ± 19

79.8 ± 8

38.6 ± 21

37.3 ± 17

$N-N{H}_4^{+}$ (mg/L)

130.9 ± 68

99.8 ± 21

41.9 ± 11

42.8 ± 13

42.5 ± 14

4.8 ± 2.4

3.5 ± 2.1

$N-N{O}_3^{-}$ (mg/L)

4.3 ± 2.5

2.7 ± 1.3

21.4 ± 9.7

18.6 ± 8.6

21.3 ± 11

31.4 ± 12

29.8 ± 11

$P-P{O}_4^{3-}$ (mg/L)

70.9 ± 43

68.7 ± 39

48.1 ± 25

53.5 ± 21

44.2 ± 23

13.0 ± 5.2

14.6 ± 4.8