Biodegradation of textile azo dye by Shewanella decolorationis S12 under microaerophilic conditions

Appl Microbiol Biotechnol. 2007 Sep;76(3):719-26. doi: 10.1007/s00253-007-1032-7. Epub 2007 Jun 23.

Abstract

The complete biodegradation of azo dye, Fast Acid Red GR, was observed under microaerophilic conditions by Shewanella decolorationis S12. Although the highest decolorizing rate was measured under anaerobic condition and the highest biomass was obtained under aerobic condition, a further biodegradation of decolorizing products can only be achieved under microaerophilic conditions. Under microaerophilic conditions, S. decolorationis S12 could use a range of carbon sources for azo dye decolorization, including lactate, formate, glucose and sucrose, with lactate being the optimal carbon source. Sulfonated aromatic amines were not detected during the biotransformation of Fast Acid Red GR, while H(2)S formed. The decolorizing products, aniline, 1,4-diaminobenzene and 1-amino-2-naphthol, were followed by complete biodegradation through catechol and 4-aminobenzoic acid based on the analysis results of GC-MS and HPLC.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aerobiosis
  • Anaerobiosis
  • Azo Compounds / chemistry
  • Azo Compounds / metabolism*
  • Biodegradation, Environmental
  • Biomass
  • Carbon / metabolism
  • Chromatography, High Pressure Liquid
  • Coloring Agents / chemistry
  • Coloring Agents / metabolism*
  • Gas Chromatography-Mass Spectrometry
  • Kinetics
  • Molecular Structure
  • Shewanella / growth & development
  • Shewanella / metabolism*
  • Textiles

Substances

  • Azo Compounds
  • Coloring Agents
  • Carbon