Total solids in feed (mg/L)

FO membrane

MD membrane

Initial flux

Flux after 20 h

% Decline

Initial flux

Flux after 20 h

% Decline

2000

1.37

0.35

74.4%

4.00

0.33

91.8%

1000

1.71

0.78

54.5%

4.08

1.13

72.2%

400

2.07

1.63

21.0%

4.10

1.83

55.3%

200

2.37

1.88

20.5%

3.90

2.17

44.5%