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The fate of trace organic contaminants during anaerobic digestion of primary sludge: A pilot scale study

Journal Article


Abstract


  • A pilot-scale study was conducted to investigate the fate of trace organic contaminants (TrOCs) during anaerobic digestion of primary sludge. Of the 44 TrOCs monitored, 24 were detected in all primary sludge samples. Phase distribution of TrOCs was correlated well with their hydrophobicity ( > 67% mass in the solid phase when LogD > 1.5). The pilot-scale anaerobic digester achieved a steady performance with a specific methane yield of 0.39–0.92 L/gVSremoved and methane composition of 63–65% despite considerable variation in the primary sludge. The fate of TrOCs in the aqueous and solid phases was governed by their physicochemical properties. Biotransformation was significant ( > 83%) for five TrOCs with logD < 1.5 and electron donating functional groups in molecular structure. The remaining TrOCs with logD < 1.5 were persistent and thus accumulated in the aqueous phase. Most TrOCs with logD > 1.5 were poorly removed under anaerobic conditions. Sorption onto the solid phase appears to impede the biodegradation of these TrOCs.

UOW Authors


  •   Phan, Hop V. (external author)
  •   Wickham, John (external author)
  •   Xie, Sihuang
  •   McDonald, James A. (external author)
  •   Khan, Stuart J. (external author)
  •   Ngo, Hao H. (external author)
  •   Guo, Wenshan (external author)
  •   Nghiem, Long D. (external author)

Publication Date


  • 2018

Citation


  • Phan, H. V., Wickham, R., Xie, S., McDonald, J. A., Khan, S. J., Ngo, H. H., Guo, W. & Nghiem, L. D. (2018). The fate of trace organic contaminants during anaerobic digestion of primary sludge: A pilot scale study. Bioresource Technology, 256 384-390.

Scopus Eid


  • 2-s2.0-85042188399

Number Of Pages


  • 6

Start Page


  • 384

End Page


  • 390

Volume


  • 256

Place Of Publication


  • Netherlands

Abstract


  • A pilot-scale study was conducted to investigate the fate of trace organic contaminants (TrOCs) during anaerobic digestion of primary sludge. Of the 44 TrOCs monitored, 24 were detected in all primary sludge samples. Phase distribution of TrOCs was correlated well with their hydrophobicity ( > 67% mass in the solid phase when LogD > 1.5). The pilot-scale anaerobic digester achieved a steady performance with a specific methane yield of 0.39–0.92 L/gVSremoved and methane composition of 63–65% despite considerable variation in the primary sludge. The fate of TrOCs in the aqueous and solid phases was governed by their physicochemical properties. Biotransformation was significant ( > 83%) for five TrOCs with logD < 1.5 and electron donating functional groups in molecular structure. The remaining TrOCs with logD < 1.5 were persistent and thus accumulated in the aqueous phase. Most TrOCs with logD > 1.5 were poorly removed under anaerobic conditions. Sorption onto the solid phase appears to impede the biodegradation of these TrOCs.

UOW Authors


  •   Phan, Hop V. (external author)
  •   Wickham, John (external author)
  •   Xie, Sihuang
  •   McDonald, James A. (external author)
  •   Khan, Stuart J. (external author)
  •   Ngo, Hao H. (external author)
  •   Guo, Wenshan (external author)
  •   Nghiem, Long D. (external author)

Publication Date


  • 2018

Citation


  • Phan, H. V., Wickham, R., Xie, S., McDonald, J. A., Khan, S. J., Ngo, H. H., Guo, W. & Nghiem, L. D. (2018). The fate of trace organic contaminants during anaerobic digestion of primary sludge: A pilot scale study. Bioresource Technology, 256 384-390.

Scopus Eid


  • 2-s2.0-85042188399

Number Of Pages


  • 6

Start Page


  • 384

End Page


  • 390

Volume


  • 256

Place Of Publication


  • Netherlands