Archaea / 2013 / Article / Fig 3

Research Article

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

Figure 3

Bioreactor performance for Experiment 2. Volumetric methane production rates (a) and hydrogen conversion efficiencies (b) for bioreactor runs in which the hydrogen influent rate was varied. Data were gathered during two different headspace pressures in the bioreactor (atmospheric pressure (101 kPa) and 122 kPa). The error bars represent the observed variance between runs for each bioreactor condition.