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Occurrence of trace organic contaminants in wastewater sludge and their removals by anaerobic digestion

Journal Article


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Abstract


  • This study aims to evaluate the occurrence of trace organic contaminants (TrOCs) in wastewater sludge and their removal during anaerobic digestion. The significant occurrence of 18 TrOCs in primary sludge was observed. These TrOCs occurred predominantly in the solid phase. Some of these TrOCs (e.g. paracetamol, caffeine, ibuprofen and triclosan) were also found at high concentrations (>10,000. ng/L) in the aqueous phase. The overall removal of TrOCs (from both the aqueous and solid phase) by anaerobic digestion was governed by their molecular structure (e.g. the presence/absence of electron withdrawing/donating functional groups). While an increase in sludge retention time (SRT) of the digester resulted in a small but clearly discernible increase in basic biological performance (e.g. volatile solids removal and biogas production), the impact of SRT on TrOC removal was negligible. The lack of SRT influence on TrOC removal suggests that TrOCs were not the main substrate for anaerobic digestion.

Authors


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

Publication Date


  • 2016

Citation


  • Yang, S., Hai, F. I., Price, W. E., McDonald, J., Khan, S. J. & Nghiem, L. D. (2016). Occurrence of trace organic contaminants in wastewater sludge and their removals by anaerobic digestion. Bioresource Technology, 210 153-159.

Scopus Eid


  • 2-s2.0-84954271100

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6290&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5262

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 153

End Page


  • 159

Volume


  • 210

Place Of Publication


  • Netherlands

Abstract


  • This study aims to evaluate the occurrence of trace organic contaminants (TrOCs) in wastewater sludge and their removal during anaerobic digestion. The significant occurrence of 18 TrOCs in primary sludge was observed. These TrOCs occurred predominantly in the solid phase. Some of these TrOCs (e.g. paracetamol, caffeine, ibuprofen and triclosan) were also found at high concentrations (>10,000. ng/L) in the aqueous phase. The overall removal of TrOCs (from both the aqueous and solid phase) by anaerobic digestion was governed by their molecular structure (e.g. the presence/absence of electron withdrawing/donating functional groups). While an increase in sludge retention time (SRT) of the digester resulted in a small but clearly discernible increase in basic biological performance (e.g. volatile solids removal and biogas production), the impact of SRT on TrOC removal was negligible. The lack of SRT influence on TrOC removal suggests that TrOCs were not the main substrate for anaerobic digestion.

Authors


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

Publication Date


  • 2016

Citation


  • Yang, S., Hai, F. I., Price, W. E., McDonald, J., Khan, S. J. & Nghiem, L. D. (2016). Occurrence of trace organic contaminants in wastewater sludge and their removals by anaerobic digestion. Bioresource Technology, 210 153-159.

Scopus Eid


  • 2-s2.0-84954271100

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6290&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5262

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 153

End Page


  • 159

Volume


  • 210

Place Of Publication


  • Netherlands