Biomethanation in a thermophilic biotrickling filter using cattle manure as nutrient media

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Abstract

Hydrogenotrophic methanogenesis is a power-to-gas method, biologically converting CO 2 to CH 4 using H 2 generated from electrical power. However, the low rate of gas-liquid mass transfer of H 2 limits the hydrogenotrophic methanogens biocatalyst. We explored hydrogenotrophic methanogenesis using cattle manure as trickling solution by employing a thermophilic biotrickling filter (BTF) with a fixed bed of polyurethane foam. It was found that stable biomethanation was possible with 100% H 2 conversion and specific methane productivity of 2.08 Nm 3 m −3 d −1 at a gas retention time of 1.32 h under thermophilic conditions. The successful use of pasteurized cattle manure, a cost-effective nutrient would enable biomethanation to get one step closer to being economically feasible.

Original languageEnglish
Article number100391
JournalBioresource Technology Reports
Volume9
Number of pages8
ISSN2589-014X
DOIs
Publication statusPublished - Feb 2020

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Keywords

  • Biogas
  • Biomethane
  • Hydrogen
  • Hydrogenotrophic methanogenesis
  • Power-to-gas
  • Upgrading

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