Reverse osmosis filtration for ersatz space mission wastewaters

Yeomin Yoon*, Richard M Lueptow

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


Adequate rejection of a variety of inorganic and organic compounds is necessary if reverse osmosis (RO) and nanofiltration (NF) membranes are to be used for space mission wastewater reuse. Three ersatz space mission wastewaters having different pH, conductivities, and amounts of organic compounds were tested to determine the membrane flux and the solute rejection for five RO and two NF membranes that are commercially available. The results show that the rejection of ions depend upon the solution pH which influences electrostatic repulsion, while for organic solutes the removal depends mainly upon the solute radius and molecular structure. In addition, the rejection of dissolved organic carbon depends upon the composition of the wastewater. The ratio of solute radius (ri,s) to effective membrane pore radius (rp) can be employed to predict the rejection of ions and organic compounds.

Original languageEnglish (US)
StatePublished - Dec 1 2005
Event35th International Conference on Environmental Systems, ICES 2005 - Rome, Italy
Duration: Jul 11 2005Jul 14 2005


Other35th International Conference on Environmental Systems, ICES 2005

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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