A bacterial strain isolated from activated sludge and identified as Bacillus amyloliquefaciens could biodegrade phenol, but 2,4,6-trichlorophenol (TCP) inhibited phenol biodegradation and biomass growth. UV photolysis converted TCP into dichlorocatechol, monochlorophenol, and dichlorophenol, and this relieved inhibition by TCP. Phenol-removal and biomass-growth rates were significantly accelerated after UV photolysis: the monod maximum specific growth rate (μmax) increased by 9 % after TCP photolysis, and the half-maximum-rate concentration (KS) decreased by 36 %. Thus, the major benefit of UV photolysis in this case was to transform TCP into a set of much-less-inhibitory products.

Original languageEnglish (US)
Pages (from-to)59-67
Number of pages9
Issue number1
StatePublished - Feb 1 2016


  • 2,4,6-trichlorophenol
  • Biodegradation
  • Kinetics
  • Phenol
  • Photolysis

ASJC Scopus subject areas

  • Environmental Engineering
  • Microbiology
  • Bioengineering
  • Environmental Chemistry
  • Pollution


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