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Biotechnology Letters

, Volume 25, Issue 21, pp 1815–1818 | Cite as

Decolorization of azo dyes by Rhodobacter sphaeroides

  • Zhi-yong Song
  • Ji-ti Zhou
  • Jing Wang
  • Bin Yan
  • Cui-hong Du
Article

Abstract

Rhodobacter sphaeroides AS1.1737 decolorized more than 90% of several azo dyes (200 mg dyes l−1) in 24 h. The optimal culture conditions were: anaerobic illumination (1990 lx), peptone as carbon source, temperature 35–40 °C and pH 7–8. Intracellular crude enzyme from this strain had azoreductase activity, optimized temperature as 45–50 °C, and decolorization kinetics which were consistent with a ping-pong mechanism.

azo dye azoreductase decolorization Rhodobacter sphaeroides 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Zhi-yong Song
    • 1
  • Ji-ti Zhou
    • 1
  • Jing Wang
    • 1
  • Bin Yan
    • 1
  • Cui-hong Du
    • 1
  1. 1.School of Environmental and Biological Science and TechnologyDalian University of TechnologyDalianP.R. China

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