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Table 1 Reactors’ performance at phase I (steady state, before H2 injection) and phase II (1 week after H2 injection)

From: Microbial activity response to hydrogen injection in thermophilic anaerobic digesters revealed by genome-centric metatranscriptomics

Reactor configuration

Phase I (pre-H2)

Phase II (post-H2)

CH4 yield (mL CH4/g CODadded)

CH4 (%)

CO2 (%)

CH4 yield (mL CH4/g CODadded)

CH4 (%)

CO2 (%)

H2 (%)

H2 consumption rate (mL/L day)

CO2 conversion rate (mL/L day)

Single stage

110 ± 21

44.6 ± 0.1

55.4 ± 0.1

142 ± 16

51.6 ± 0.1

23.0 ± 0.1

25.4 ± 0.1

648 ± 24

182 ± 56

Two-stage

276 ± 34

57.3 ± 0.1

42.7 ± 0.1

152 ± 16

39.7 ± 0.1

30.0 ± 0.1

30.3 ± 0.1

303 ± 64

173 ± 35

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Microbiome

ISSN: 2049-2618

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