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Bioresources and Bioprocessing

Table 5 Average TN, TP, PO4− 3, SO4− 2 and S− 2 concentration of methanogenesis reactor effluent at different HRT

From: Optimization of operating parameters for biogas production using two-phase bench-scale anaerobic digestion of slaughterhouse wastewater: Focus on methanogenic step

Parameter

HRT in days

12

9

6

3

TN (mg/L)

464 ± 32

443 ± 35

461 ± 41

464 ± 34

TP (mg/L)

100 ± 17

103 ± 7

105 ± 7

101 ± 8

PO4−3 (mg/L)

63 ± 6

70 ± 5

75 ± 8

86 ± 10

SO4−2 (mg/L)

130 ± 30

146 ± 9

166 ± 4

197 ± 14

S−2 (mg/L)

0.98 ± 0.04

1.00 ± 0.01

1.01 ± 0. 01

1.02 ± 0.01

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