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Fate of trace organic contaminants in oxic-settling-anoxic (OSA) process applied for biosolids reduction during wastewater treatment

Journal Article


Abstract


  • This study investigated the fate of trace organic contaminants (TrOCs) in an oxic-settling-anoxic (OSA) process consisting of a sequencing batch reactor (SBR) with external aerobic/anoxic and anoxic reactors. OSA did not negatively affect TrOC removal of the SBR. Generally, low TrOC removal was observed under anoxic and low substrate conditions, implicating the role of co-metabolism in TrOC biodegradation. Several TrOCs that were recalcitrant in the SBR (e.g., benzotriazole) were biodegraded in the external aerobic/anoxic reactor. Some hydrophobic TrOCs (e.g., triclosan) were desorbed in the anoxic reactor possibly due to loss of sorption sites through volatile solids destruction. In OSA, the sludge was discharged from the aerobic/anoxic reactor which contained lower concentration of TrOCs (e.g., triclosan and triclocarban) than that of the control aerobic digester, suggesting that OSA can also help to reduce TrOC concentration in residual biosolids.

UOW Authors


  •   Semblante, Galilee U. (external author)
  •   Hai, Faisal
  •   McDonald, James A. (external author)
  •   Khan, Stuart J. (external author)
  •   Nelson, Mark
  •   Lee, Duu-Jong (external author)
  •   Price, William
  •   Nghiem, Long D. (external author)

Publication Date


  • 2017

Citation


  • Semblante, G. U., Hai, F. I., McDonald, J., Khan, S. J., Nelson, M., Lee, D., Price, W. E. & Nghiem, L. D. (2017). Fate of trace organic contaminants in oxic-settling-anoxic (OSA) process applied for biosolids reduction during wastewater treatment. Bioresource Technology, 240 181-191.

Scopus Eid


  • 2-s2.0-85014707717

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1983

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 181

End Page


  • 191

Volume


  • 240

Place Of Publication


  • Netherlands

Abstract


  • This study investigated the fate of trace organic contaminants (TrOCs) in an oxic-settling-anoxic (OSA) process consisting of a sequencing batch reactor (SBR) with external aerobic/anoxic and anoxic reactors. OSA did not negatively affect TrOC removal of the SBR. Generally, low TrOC removal was observed under anoxic and low substrate conditions, implicating the role of co-metabolism in TrOC biodegradation. Several TrOCs that were recalcitrant in the SBR (e.g., benzotriazole) were biodegraded in the external aerobic/anoxic reactor. Some hydrophobic TrOCs (e.g., triclosan) were desorbed in the anoxic reactor possibly due to loss of sorption sites through volatile solids destruction. In OSA, the sludge was discharged from the aerobic/anoxic reactor which contained lower concentration of TrOCs (e.g., triclosan and triclocarban) than that of the control aerobic digester, suggesting that OSA can also help to reduce TrOC concentration in residual biosolids.

UOW Authors


  •   Semblante, Galilee U. (external author)
  •   Hai, Faisal
  •   McDonald, James A. (external author)
  •   Khan, Stuart J. (external author)
  •   Nelson, Mark
  •   Lee, Duu-Jong (external author)
  •   Price, William
  •   Nghiem, Long D. (external author)

Publication Date


  • 2017

Citation


  • Semblante, G. U., Hai, F. I., McDonald, J., Khan, S. J., Nelson, M., Lee, D., Price, W. E. & Nghiem, L. D. (2017). Fate of trace organic contaminants in oxic-settling-anoxic (OSA) process applied for biosolids reduction during wastewater treatment. Bioresource Technology, 240 181-191.

Scopus Eid


  • 2-s2.0-85014707717

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1983

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 181

End Page


  • 191

Volume


  • 240

Place Of Publication


  • Netherlands