Performance evaluation and effect of biogas circulation rate of a bubble column for biological desulfurization

Takuro Kobayashi, Kai Qin Xu, Yu You Li, Yuhei Inamori

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Biological desulfurization using a bubble column reactor was investigated in a continuous biogas treatment. Rapid biogas circulation between the digester and the bubble column for biological desulfurization was used to stimulate the gas - liquid mass transfer of H2S. A positive correlation between the biogas circulation rate and H2S removal rate was observed. Moreover, the increase in the circulation rate stimulated the O2 mass transfer, eventually translating into an increase in sulfate production from the oxidation of H2S. Throughout the continuous experiment, the reactor retained sufficient levels of sulfide-oxidizing bacteria. A comparison of the results of the continuous biogas treatment and batch tests suggests that the gas - liquid mass transfer rate of H2S was the rate-limiting step in the biological desulfurization in the reactor, indicating that the mass transfer efficiency of H2S needs to be improved to enhance the desulfurization performance.

Original languageEnglish
Pages (from-to)1914-1922
Number of pages9
JournalWater Science and Technology
Volume66
Issue number9
DOIs
Publication statusPublished - 2012 Dec 5

Keywords

  • Anaerobic digestion
  • Biogas circulation
  • Biological desulfurization

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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