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Table 5 Performance of acidogenic and methanogenic reactors (MR) with different mixing ratios

From: Effect of carbon-rich-waste addition as co-substrate on the performance and stability of anaerobic digestion of abattoir wastewater without agitation

Parameters

Reactors with different mixing ratios

HR1

HR2

HR3

HR4

HR5

Acidogenic reactor (HR)

 pH

7.47±.09

6.82±.47

6.41 ± .25

6.32 ± .16

6.00 ± .3

 ORP (mv)

− 24.88 ± 4.85

11.00 ± 26.38

34.13 ± 14.55

39.00 ± 9.06

57.13 ± 16.88

 TS (%)

.73 ± .41

.96 ± .11

1.35 ± .44

2.13 ± 1.91

1.53 ± .23

 VS (%)

70.71 ± 3.58

64.14 ± 2.47

64.50 ± 14.47

57.25 ± 1.48

48.75 ± 10.29

 NH3 (mg/l)

1726.25 ± 139.99

1432.50 ± 185.76

1273.75 ± 316.45

866.25 ± 301.99

488.75 ± 155.97

 TALK (g CaCO3/l)

7.95 ± 2.47

6.82 ± 2.36

6.45 ± 1.77

5.90 ± 1.37

5.39 ± .95

 TCOD (mg/l)

9986.25 ± 1071.63

10,222.5 ± 912.07

10,175.0 ± 1059.3

10,622.5 ± 1103.28

10,791.25 ± 1033.81

 VFA (g/L)

38.71 ± 9.88

44.45 ± 10.72

44.53 ± 9.31

43.55 ± 7.98

36.94 ± 12.43

 

MR1

MR2

MR3

MR4

MR5

Methanogenic reactor (MR)

  

 pH

8.02 ± .076

8.07 ± .06

7.98 ± .08

8.06 ± .11

7.99 ± .07

 ORP (mv)

− 54.75 ± 4.062

− 57.13 ± 3.09

− 52.75 ± 4.80

− 56.88 ± 6.06

− 53.63 ± 3.89

 TS (%)

.54 ± .17

.63 ± .08

1.12 ± 1.20

.78 ± .14

1.13 ± .16

 VS (%)

70.27 ± 12.51

53.21 ± 3.39

36.97 ± 13.65

34.92 ± 3.02

39.13 ± 11.26

 NH3 (mg/l)

1492.50 ± 175.15

1212.50 ± 131.99

901.25 ± 108.69

691.25 ± 129.88

402.50 ± 62.51

 TALK (g CaCO3/l)

8.61 ± 2.68

8.77 ± 2.47

8.57 ± 2.53

8.34 ± 2.764

7.94 ± 2.65

 CH4 (%)

56.64 ± 1.89

47.16 ± 3.12

59.95 ± 3.66

28.63 ± 3.76

31.81 ± 2.87

 Biogas (ml/day)

243.75 ± 35.03

342.50 ± 65.63

590.00 ± 49.86

331.25 ± 37.20

188.75 ± 45.18

 CH4 (ml/day)

138.34 ± 22.41

162.98 ± 39.46

353.86 ± 38.46

94.16 ± 11.94

59.16 ± 10.94

 TCOD (mg/l)

7212.50 ± 2028.19

6067.50 ± 2145.61

5730.00 ± 3070.31

3867.50 ± 2625.05

4227.50 ± 3373.28

 TVFA (g CH3COOH/l)

10.95 ± 6.41

11.47 ± 3.27

5.80 ± 1.37

4.91 ± 0.43

4.16 ± 0.96

 VS removed (%)

44.7

53.37

70.23

63.84

59.84

 SMY (mlCH4/g VS add)

20.30

22.84

36.53

9.00

5.37

 BY (ml Biogas/g VS add)

35.77

48.00

60.90

31.65

17.13