Table 2. Operation periods for the EGSB reactor, with desorption column.

Operation period

SO4-2 (mg/l)

pH

COD/SO4-2

Sulphate loading rate

(g/Ld)

15

900

7.5

4.7

3.6

16

900

7.0

4.7

3.6

17

900

6.5

4.7

3.6

18

1600

7.5

2.6

6.5

19

1600

7.0

2.6

6.5

20

1600

6.5

2.6

6.5

21

2100

7.5

2.0

8.5

22

2100

7.0

2.0

8.5

23

2100

6.5

2.0

8.5

VS was kept at 8.5 m/h

 

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