Inhibition of a biological sulfide oxidation under haloalkaline conditions by thiols and diorgano polysulfanes

Pawel Roman*, Joanna Lipińska, Martijn F.M. Bijmans, Dimitry Y. Sorokin, Karel J. Keesman, Albert J.H. Janssen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

A novel approach has been developed for the simultaneous description of reaction kinetics to describe the formation of polysulfide and sulfate anions from the biological oxidation of hydrogen sulfide (H2S) using a quick, sulfide-dependent respiration test. Next to H2S, thiols are commonly present in sour gas streams. We investigated the inhibition mode and the corresponding inhibition constants of six thiols and the corresponding diorgano polysulfanes on the biological oxidation of H2S. A linear relationship was found between the calculated IC50 values and the lipophilicity of the inhibitors. Moreover, a mathematical model was proposed to estimate the biomass activity in the absence and presence of sulfurous inhibitors. The biomass used in the respiration tests originated from a full-scale biodesulfurization reactor. A microbial community analysis of this biomass revealed that two groups of microorganism are abundant, viz. Ectothiorhodospiraceae and Piscirickettsiaceae.

Original languageEnglish
Pages (from-to)448-456
JournalWater Research
Volume101
DOIs
Publication statusPublished - 2016

Keywords

  • Diorgano polysulfanes
  • Kinetic constants
  • Respirometry
  • Sulfide oxidizing bacteria
  • Thioalkalivibrio
  • Thiols

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