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The fate of trace organic contaminants in sewage sludge during recuperative thickening anaerobic digestion

Journal Article


Abstract


  • The aim of this work was to study the fate of trace organic contaminants (TrOCs) in sewage sludge during recuperative thickening anaerobic digestion. Sludge shearing at 3142 s−1 for 5 minutes improved biogas production. By contrast, shearing at ≥6283 s−1 for 5 minutes caused a notable reduction in biogas production and the removal of volatile solids. Results reported here showed the prevalent occurrence of 17 TrOCs in sewage sludge and highlights the importance of assessing TrOC removal via mass balance calculation by taking into account partitioning between the aqueous and solid phase as well as biodegradation. Hydrophilic and readily-biodegradable TrOCs (caffeine, trimethoprim, and paracetamol) were well removed and were not affected by shearing. TrOCs such as carbamazepine, gemfibrozil, and diuron showed biodegradation only at high shearing. It is possible that shearing can facilitate the circulation of TrOCs between aqueous and solid phases, thus, enhancing the biodegradation of some TrOCs.

Authors


  •   Yang, Shufan (external author)
  •   McDonald, James A. (external author)
  •   Hai, Faisal I.
  •   Price, William E.
  •   Khan, Stuart J. (external author)
  •   Nghiem, Long D. (external author)

Publication Date


  • 2017

Citation


  • Yang, S., McDonald, J., Hai, F. I., Price, W. E., Khan, S. J. & Nghiem, L. D. (2017). The fate of trace organic contaminants in sewage sludge during recuperative thickening anaerobic digestion. Bioresource Technology, 240 197-206.

Scopus Eid


  • 2-s2.0-85013377933

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/103

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 197

End Page


  • 206

Volume


  • 240

Place Of Publication


  • Netherlands

Abstract


  • The aim of this work was to study the fate of trace organic contaminants (TrOCs) in sewage sludge during recuperative thickening anaerobic digestion. Sludge shearing at 3142 s−1 for 5 minutes improved biogas production. By contrast, shearing at ≥6283 s−1 for 5 minutes caused a notable reduction in biogas production and the removal of volatile solids. Results reported here showed the prevalent occurrence of 17 TrOCs in sewage sludge and highlights the importance of assessing TrOC removal via mass balance calculation by taking into account partitioning between the aqueous and solid phase as well as biodegradation. Hydrophilic and readily-biodegradable TrOCs (caffeine, trimethoprim, and paracetamol) were well removed and were not affected by shearing. TrOCs such as carbamazepine, gemfibrozil, and diuron showed biodegradation only at high shearing. It is possible that shearing can facilitate the circulation of TrOCs between aqueous and solid phases, thus, enhancing the biodegradation of some TrOCs.

Authors


  •   Yang, Shufan (external author)
  •   McDonald, James A. (external author)
  •   Hai, Faisal I.
  •   Price, William E.
  •   Khan, Stuart J. (external author)
  •   Nghiem, Long D. (external author)

Publication Date


  • 2017

Citation


  • Yang, S., McDonald, J., Hai, F. I., Price, W. E., Khan, S. J. & Nghiem, L. D. (2017). The fate of trace organic contaminants in sewage sludge during recuperative thickening anaerobic digestion. Bioresource Technology, 240 197-206.

Scopus Eid


  • 2-s2.0-85013377933

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/103

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 197

End Page


  • 206

Volume


  • 240

Place Of Publication


  • Netherlands