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Table 1 Process performance variables for control and H2-supplemented reactors during the stable phase (mean ± S.D)

From: Effects of H2:CO2 ratio and H2 supply fluctuation on methane content and microbial community composition during in-situ biological biogas upgrading

 

Control

H2-supplemented

Biogas compositions (%)

 CH4

66.70 ± 0.36

94.47 ± 1.21

 CO2

33.30 ± 0.36

3.09 ± 0.64

 H2

–

2.45 ± 0.83

 CH4 production rate (mL L−1 h−1)

1.03 ± 0.02

1.68 ± 0.11

 CH4 from H2 consumed (mL L−1 h−1)

–

0.59±0.09

 H2 added to reactor (mL L−1 h−1)

–

2.37 ± 0.39

 H2 consumed (mL L−1 h−1)

–

2.32 ± 0.38

 ɳH2 (%)

–

98

 Total VFA (mg L−1)

35.4 ± 20.40

37.5 ± 10.40

 pH

7.07 ± 0.11

7.64 ± 0.15