Oxidation of methane by Methylomicrobium album and Methylocystis sp. in the presence of H2S and NH3

Manuel Cáceres, Juan C. Gentina, Germán Aroca

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Oxidation of methane by methanotrophs, Methylomicrobium album and Methylocystis sp., was measured at several initial concentrations of H2S and NH3 in the headspace of stoppered flasks, at the same initial concentration of methane as sole carbon and energy source: 15 % (v/v). No effect was observed at 0.01 % (v/v) H2S and 0.025 % (v/v) NH3 in gas phase but over 0.05 and 0.025 % (v/v), respectively, they inhibited the oxidation of methane. The effect of H2S was stronger in Methylocystis sp. and both microorganisms were similarly affected by NH3. Depending on their concentrations in gas phase, H2S and NH3 can thus affect the rate of oxidation of methane and biomass growth of both methanotrophs.

Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalBiotechnology Letters
Volume36
Issue number1
DOIs
StatePublished - Jan 2014
Externally publishedYes

Keywords

  • Ammonia
  • Hydrogen sulfide
  • Methane oxidation
  • Methylocystis sp.
  • Methylomicrobium album

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