Effect of dissolved oxygen regime on growth dynamics of Pseudomonas spp during benzene degradation

B. Mahendran, N. C. Choi, J. W. Choi, Dong Ju Kim

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We investigated the effect of different oxygen regimes on growth patterns of Pseudomonas spp. during benzene degradation in microcosm batch studies. Benzene degradation was induced by limiting oxygen available for microbial activity, which consists of three initial-dissolved oxygen (DO) levels of oxic, hypoxic, and anoxic conditions. Batch experiments were performed for cell growth and benzene degradation by inoculating three strains of Pseudomonas spp. (Pseudomonas aeruginosa, Pseudomonas fluorescens, Pseudomonas putida) in mineral salt medium containing aqueous benzene. Results showed that all strains were capable to grow and degrade benzene under all oxygen regimes but in a different manner. The highest cell growth of P. aeruginosa and P. fluorescens was achieved under oxic and anoxic condition, respectively, but there was no substantial difference on benzene degradation between the oxygen treatments with about 25% reduction for both strains. P. putida showed a facultative process for both cell growth and benzene degradation. This reveals that care should be taken in selection of microorganisms with regard to environmental studies since they exhibit different responses for given environmental conditions such as DO levels.

Original languageEnglish
Pages (from-to)350-354
Number of pages5
JournalApplied Microbiology and Biotechnology
Volume71
Issue number3
DOIs
Publication statusPublished - 2006 Jul 1

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Dissolved oxygen
Pseudomonas
Benzene
Oxygen
Degradation
Growth
Cell growth
Pseudomonas fluorescens
Pseudomonas putida
Pseudomonas aeruginosa
Cell Growth Processes
Microorganisms
Minerals
Salts
Experiments

ASJC Scopus subject areas

  • Biotechnology
  • Microbiology
  • Bioengineering
  • Microbiology (medical)

Cite this

Effect of dissolved oxygen regime on growth dynamics of Pseudomonas spp during benzene degradation. / Mahendran, B.; Choi, N. C.; Choi, J. W.; Kim, Dong Ju.

In: Applied Microbiology and Biotechnology, Vol. 71, No. 3, 01.07.2006, p. 350-354.

Research output: Contribution to journalArticle

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