Table 2 The Cr(VI) reducing capability of activated sludge, activated sludge without EPS, EPS and nutrient. *Represent standard deviation (s.d.).

From: Characterization of Product and Potential Mechanism of Cr(VI) Reduction by Anaerobic Activated Sludge in a Sequencing Batch Reactor

Time (h)

Concentrations of Cr(VI) (mg l−1)

Activated sludge

Activated sludge without EPS

EPS

Nutrient

0

100.05 ± 1.94*

100.12 ± 1.95

100.40 ± 2.35

100.60 ± 2.09

4

72.62 ± 1.29

75.15 ± 2.04

98.97 ± 1.56

99.34 ± 0.98

8

45.53 ± 1.12

55.76 ± 1.57

96.28 ± 1.69

98.24 ± 1.06

12

30.88 ± 1.34

40.25 ± 1.85

94.29 ± 2.12

97.68 ± 1.23

16

10.74 ± 0.89

32.63 ± 1.03

93.47 ± 1.67

97.57 ± 1.78

24

1.05 ± 0.12

30.63 ± 1.47

92.63 ± 2.34

97.55 ± 1.45

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