Table 1 System performance at different HRTs.

From: Effects of hydraulic retention time on adsorption behaviours of EPS in an A/O-MBR: biofouling study with QCM-D

Time (day)

HRT (h)

Influent (mg/L)

Effluent (mg/L)

Removal rate (%)

COD

NH3-N

TN

COD

NH3-N

TN

COD

NH3-N

TN

1–21

Start up

357.3 ± 90.9

75.1 ± 13.9

78.6 ± 14.8

65.4 ± 18.8

10.1 ± 4.3

20.2 ± 4.2

81.0 ± 5.9

86.7 ± 4.6

74.0 ± 4.0

22–38

11.2

310.3 ± 87.9

65.0 ± 14.2

66.4 ± 14.0

49.7 ± 9.2

1.1 ± 0.2

18.8 ± 3.5

83.4 ± 2.6

98.4 ± 2.7

71.1 ± 5.5

39–68

12.5

379.1 ± 45.4

62.7 ± 10.0

66.1 ± 10.3

53.4 ± 9.0

1.2 ± 0.7

16.6 ± 4.0

85.8 ± 2.7

98.1 ± 1.1

74.9 ± 4.4

69–98

14.3

386.7 ± 55.6

60.0 ± 10.2

65.3 ± 11.2

54.9 ± 8.8

1.0 ± 0.7

16.7 ± 4.5

85.5 ± 3.0

98.3 ± 1.1

74.5 ± 4.6

  1. Note: the concentrations in influent, effluent and the removal rate were calculated as the average values during the whole experiments.
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