Biodegradation of triclosan and formation of methyl-triclosan in activated sludge under aerobic conditions

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  • Xijuan Chen, Sektion for Bioteknologi, Danmark
  • Jeppe Lund Nielsen, Institut for Kemi og Bioteknologi, Danmark
  • Karolina Furgal, Sektion for Miljøteknologi, Danmark
  • Yaling Liu, Aalborg Universitet, Danmark
  • Ihan Bishara Lolas, Aalborg Universitet, Danmark
  • Kai Bester
Triclosan is an antimicrobial agent which is widely used in household and personal care products.
Widespread use of this compound has led to the elevated concentrations of triclosan in wastewater,
wastewater treatment plants (WWTPs) and receiving waters. Removal of triclosan and formation of triclosan-
methyl was investigated in activated sludge from a standard activated sludge WWTP equipped
with enhanced biological phosphorus removal. The removal was found to occur mainly under aerobic
conditions while under anoxic (nitrate reducing) and anaerobic conditions rather low removal rates were
determined. In a laboratory-scale activated sludge reactor 75% of the triclosan was removed under aerobic
conditions within 150 h, while no removal was observed under anaerobic or anoxic conditions.
One percent of the triclosan was converted to triclosan-methyl under aerobic conditions, less under
anoxic (nitrate reducing) and none under anaerobic conditions.
Sider (fra-til)452-456
StatusUdgivet - 2011

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