Table 2 Improved ABR performance.

From: The performance and archaeal community shifts in a modified anaerobic baffled reactor treating sweet potato starch wastewater at ambient temperatures

Stage

Parameters

pH

COD (mg/L)

COD Removal contribution (%)

Methane production rate (L CH4/L/d)

Stage I

Compartment 1

6.32 ± 0.52

4073 ± 1150

12.40 ± 7.25

0.017 ± 0.014

Compartment 2

7.29 ± 1.15

3494 ± 1036

34.30 ± 3.63

0.018 ± 0.014

Compartment 3

7.64 ± 1.30

2991 ± 930

38.85 ± 7.02

0.019 ± 0.015

Compartment 4

7.43 ± 0.88

2628 ± 667

8.84 ± 1.75

0.018 ± 0.013

Compartment 5

7.49 ± 0.85

2121 ± 419

5.60 ± 2.65

0.018 ± 0.017

Stage II

Compartment 1

7.15 ± 0.11

4433 ± 745

44.02 ± 0.80

0.068 ± 0.056

Compartment 2

7.37 ± 0.15

2524 ± 730

28.18 ± 0.74

0.142 ± 0.083

Compartment 3

7.40 ± 0.14

1658 ± 596

12.82 ± 0.36

0.142 ± 0.088

Compartment 4

7.46 ± 0.15

945 ± 379

10.68 ± 0.51

0.111 ± 0.068

Compartment 5

7.51 ± 0.12

659 ± 151

4.29 ± 0.33

0.085 ± 0.043

Stage III

Compartment 1

6.65 ± 0.42

5739 ± 693

21.21 ± 0.92

0.193 ± 0.074

Compartment 2

6.80 ± 0.34

4680 ± 777

20.83 ± 0.72

0.240 ± 0.053

Compartment 3

6.99 ± 0.22

3866 ± 785

16.69 ± 0.85

0.197 ± 0.064

Compartment 4

7.14 ± 0.15

2727 ± 760

22.13 ± 0.94

0.187 ± 0.056

Compartment 5

7.22 ± 0.13

1745 ± 555

19.13 ± 0.82

0.197 ± 0.076

Stage IV

Compartment 1

5.61 ± 0.17

5037 ± 615

24.02 ± 1.11

0.103 ± 0.034

Compartment 2

6.01 ± 0.36

3915 ± 624

28.36 ± 1.10

0.145 ± 0.069

Compartment 3

6.46 ± 0.39

3107 ± 342

20.96 ± 0.96

0.111 ± 0.051

Compartment 4

6.87 ± 0.38

2639 ± 376

12.17 ± 0.42

0.120 ± 0.061

Compartment 5

7.12 ± 0.35

2067 ± 438

14.48 ± 0.31

0.126 ± 0.060

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