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Research Article

A Single-Culture Bioprocess of Methanothermobacter thermautotrophicus to Upgrade Digester Biogas by CO2-to-CH4 Conversion with H2

Table 1

The percentage of methane content in influent gas and total influent flow rate ( ) for Experiment 3. Three different methane influent rates ( ) were evaluated for three different hydrogen influent rates ( ) while maintaining the stoichiometric 4 : 1 H2 : CO2 gas mixture ratio. The total influent flow rate ( ) is shown in brackets in L/min.

00.20.4

0.20% (0.25)44% (0.45)62% (0.65)
0.40% (0.5)29% (0.7)44% (0.9)
1.60% (2)9% (2.2)17% (2.4)