Direct estimation of the oxygen requirements of Achromobacter xylosoxidans for aerobic degradation of monoaromatic hydrocarbons (BTEX) in a bioscrubber

David Nielsen, P. James McLellan, Andrew J. Daugulis

Research output: Contribution to journalArticle

30 Scopus citations


The O2 requirements for biomass production and supplying maintenance energy demands during the degradation of both benzene and ethylbenzene by Achromobacter xylosoxidans Y234 were measured using a newly proposed technique involving a bioscrubber. Using this approach, relevant microbial parameter estimates were directly and simultaneously obtained via linear regression of pseudo steady-state data. For benzene and ethylbenzene, the biomass yield on O2, YX/O2, was estimated on a cell dry weight (CDW) basis as 1.96 ±.25 mg CDW mgO2 and 0.98 ±.17 mg CDW mgO2, while the specific rate of O2 consumption for maintenance, mO2, was estimated as 0.041 ±.008 mgO2 mg CDWh and 0.053 ±.022 mgO2 mg CDWh, respectively.

Original languageEnglish (US)
Pages (from-to)1293-1298
Number of pages6
JournalBiotechnology Letters
Issue number16
Publication statusPublished - Aug 2006
Externally publishedYes



  • Bioscrubber
  • BTEX
  • Maintenance energy
  • Oxygen requirements

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology
  • Microbiology
  • Bioengineering

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