Skip to main content
placeholder image

Degradation of trace organic contaminants by a membrane distillation—enzymatic bioreactor

Journal Article


Download full-text (Open Access)

Abstract


  • A high retention enzymatic bioreactor was developed by coupling membrane distillation with an enzymatic bioreactor (MD-EMBR) to investigate the degradation of 13 phenolic and 17 non-phenolic trace organic contam inants (TrOCs). TrOCs were effectively retained (90–99%) by the MD membrane. Furthermore, significant laccase-catalyzed degradation (80–99%) was achieved for 10 phenolic and 3 non-phenolic TrOCs that contain strong electron donating functional groups. For the remaining TrOCs, enzymatic degradation ranged from 40 to 65%. This is still higher than those reported for enzymatic bioreactors equipped with ultrafiltration membranes, which retained laccase but not the TrOCs. Addition of three redox-mediators, namely syringaldehyde (SA), violuric acid (VA) and 1-hydroxybenzotriazole (HBT), in the MD-EMBR significantly broadened the spectrum of efficiently degraded TrOCs. Among the tested redox-mediators, VA (0.5 mM) was the most efficient and versatile mediator for enhanced TrOC degradation. The final effluent (i.e., membrane permeate) toxicity was below the detection limit, although there was a mediator-specific increase in toxicity of the bioreactor media.

Authors


  •   Asif, Muhammad Bilal (external author)
  •   Hai, Faisal I.
  •   Kang, Jinguo (external author)
  •   Van De Merwe, Jason P. (external author)
  •   Leusch, Frederic (external author)
  •   Yamamoto, Kazuo (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2017

Citation


  • Asif, M. B., Hai, F. I., Kang, J., van de Merwe, J. P., Leusch, F. D. L., Yamamoto, K., Price, W. E. & Nghiem, L. D. (2017). Degradation of trace organic contaminants by a membrane distillation—enzymatic bioreactor. Applied Sciences, 7 (9), 879-1-879-15.

Scopus Eid


  • 2-s2.0-85028325353

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1609&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/608

Start Page


  • 879-1

End Page


  • 879-15

Volume


  • 7

Issue


  • 9

Place Of Publication


  • Switzerland

Abstract


  • A high retention enzymatic bioreactor was developed by coupling membrane distillation with an enzymatic bioreactor (MD-EMBR) to investigate the degradation of 13 phenolic and 17 non-phenolic trace organic contam inants (TrOCs). TrOCs were effectively retained (90–99%) by the MD membrane. Furthermore, significant laccase-catalyzed degradation (80–99%) was achieved for 10 phenolic and 3 non-phenolic TrOCs that contain strong electron donating functional groups. For the remaining TrOCs, enzymatic degradation ranged from 40 to 65%. This is still higher than those reported for enzymatic bioreactors equipped with ultrafiltration membranes, which retained laccase but not the TrOCs. Addition of three redox-mediators, namely syringaldehyde (SA), violuric acid (VA) and 1-hydroxybenzotriazole (HBT), in the MD-EMBR significantly broadened the spectrum of efficiently degraded TrOCs. Among the tested redox-mediators, VA (0.5 mM) was the most efficient and versatile mediator for enhanced TrOC degradation. The final effluent (i.e., membrane permeate) toxicity was below the detection limit, although there was a mediator-specific increase in toxicity of the bioreactor media.

Authors


  •   Asif, Muhammad Bilal (external author)
  •   Hai, Faisal I.
  •   Kang, Jinguo (external author)
  •   Van De Merwe, Jason P. (external author)
  •   Leusch, Frederic (external author)
  •   Yamamoto, Kazuo (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2017

Citation


  • Asif, M. B., Hai, F. I., Kang, J., van de Merwe, J. P., Leusch, F. D. L., Yamamoto, K., Price, W. E. & Nghiem, L. D. (2017). Degradation of trace organic contaminants by a membrane distillation—enzymatic bioreactor. Applied Sciences, 7 (9), 879-1-879-15.

Scopus Eid


  • 2-s2.0-85028325353

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1609&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/608

Start Page


  • 879-1

End Page


  • 879-15

Volume


  • 7

Issue


  • 9

Place Of Publication


  • Switzerland