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A forward osmosis-membrane distillation hybrid process for direct sewer mining: system performance and limitations

Journal Article


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Abstract


  • This study demonstrates the robustness and treatment capacity of a forward osmosis (FO)–membrane distillation (MD) hybrid system for small-scale decentralized sewer mining. A stable water flux was realized using a laboratory-scale FO–MD hybrid system operating continuously with raw sewage as the feed at water recovery up to 80%. The hybrid system also showed an excellent capacity for the removal of trace organic contaminants (TrOCs), with removal rates ranging from 91 to 98%. The results suggest that TrOC transport through the FO membrane is governed by “solute–membrane” interaction, whereas that through the MD membrane is strongly correlated to TrOC volatility. Concentrations of organic matter and TrOCs in the draw solution increased substantially as the water recovery increased. This accumulation of some contaminants in the draw solution is attributed to the difference in their rejection by the FO and MD systems. We demonstrate that granular activated carbon adsorption or ultraviolet oxidation could be used to prevent contaminant accumulation in the draw solution, resulting in near complete rejection (>99.5%) of TrOCs.

Authors


  •   Xie, Ming (external author)
  •   Nghiem, Long D. (external author)
  •   Price, William E.
  •   Elimelech, Menachem (external author)

Publication Date


  • 2013

Citation


  • Xie, M., Nghiem, L. D., Price, W. E. & Elimelech, M. (2013). A forward osmosis-membrane distillation hybrid process for direct sewer mining: system performance and limitations. Environmental Science and Technology (Washington), 47 (23), 13486-13493.

Scopus Eid


  • 2-s2.0-84889816188

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2818&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1809

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 13486

End Page


  • 13493

Volume


  • 47

Issue


  • 23

Place Of Publication


  • United States

Abstract


  • This study demonstrates the robustness and treatment capacity of a forward osmosis (FO)–membrane distillation (MD) hybrid system for small-scale decentralized sewer mining. A stable water flux was realized using a laboratory-scale FO–MD hybrid system operating continuously with raw sewage as the feed at water recovery up to 80%. The hybrid system also showed an excellent capacity for the removal of trace organic contaminants (TrOCs), with removal rates ranging from 91 to 98%. The results suggest that TrOC transport through the FO membrane is governed by “solute–membrane” interaction, whereas that through the MD membrane is strongly correlated to TrOC volatility. Concentrations of organic matter and TrOCs in the draw solution increased substantially as the water recovery increased. This accumulation of some contaminants in the draw solution is attributed to the difference in their rejection by the FO and MD systems. We demonstrate that granular activated carbon adsorption or ultraviolet oxidation could be used to prevent contaminant accumulation in the draw solution, resulting in near complete rejection (>99.5%) of TrOCs.

Authors


  •   Xie, Ming (external author)
  •   Nghiem, Long D. (external author)
  •   Price, William E.
  •   Elimelech, Menachem (external author)

Publication Date


  • 2013

Citation


  • Xie, M., Nghiem, L. D., Price, W. E. & Elimelech, M. (2013). A forward osmosis-membrane distillation hybrid process for direct sewer mining: system performance and limitations. Environmental Science and Technology (Washington), 47 (23), 13486-13493.

Scopus Eid


  • 2-s2.0-84889816188

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2818&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1809

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 13486

End Page


  • 13493

Volume


  • 47

Issue


  • 23

Place Of Publication


  • United States