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Table 2 Mass balance of CH4 production, with and without H2 addition during the stable phase

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

Reactor ID

Amount of CH4 measured from experiment (mL)

Total H2 consumed (mL)

CH4 produced due to H2 addition (mL)a

CH4 estimated from residual VFA (mL)

Total CH4 produced (CH4 and residual VFA) (mL)

Theoretical CH4 (mL)b

Recovery (%)c

Control

9.55

0

0

1.42

10.97

–

–

H2-supplemented

15.67

21.75

5.44

1.78

17.45

16.41

106

  1. aCH4 from H2 consumed based on the Sabatier equation. (4 mol of H2 are required to convert 1 mol of CO2 into CH4)
  2. bTotal CH4 production from the control reactor plus the CH4 produced due to H2 addition
  3. cRecovery = (Theoretical CH4/Total CH4 produced from the H2-supplemented reactor) × 100
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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