Modelling the effects of nanofiltration membrane properties on system cost assessment for desalination applications

A. W. Mohammad, Nidal Hilal, H. Al-Zoubib, N. A. Darwish, N. Ali

    Research output: Contribution to journalArticle

    Abstract

    Nanofiltration (NF) membranes have been successfully used in various applications in water and wastewater treatment as well as other industries. In desalination plants, NF membranes were found to be suitable for pre-treatment application prior to the desalination process. In general NF membranes can be characterized in terms ofthe effective pore radius (rp), effective charge density (Xd) and permeability (Pm). NF membranes available in the market show a wide range of these properties and thus this variation affects the membrane performance significantly. Through a predictive model such as the Donnan-Steric-Pore-Dielectric-Exclusion (DSPM-DE) model, the performance of NF membranes can be predicted in terms of the solute rejections, fluxes and applied pressure. In addition, for desalination application, the osmotic effect due to the high concentration of salt can also be included in such model. The osmotic effect is taken into account by using the Vant Hoff equation and this is incorporated in the modified DSPM-DE model to allow for approximation of the reduced permeate flux. In this study, the modified DSPM-DE model was used in conjunction with an economic assessment model to analyse the effect of the NF membrane characteristics (rp, Xd and Pm) on the cost of the NF membrane system with a particular emphasis on desalination application. Detailed analyses of the economic assessment shows that rp can play a major role in reducing the cost of an NF system provided that the minimum rejection requirement is met.

    Original languageEnglish (US)
    Pages (from-to)215-225
    Number of pages11
    JournalDesalination
    Volume206
    Issue number1-3
    DOIs
    StatePublished - Feb 5 2007

    Fingerprint

    Nanofiltration membranes
    Desalination
    desalination
    membrane
    cost
    modeling
    Costs
    Fluxes
    Nanofiltration
    permeability
    Economics
    effect
    Charge density
    Water treatment
    Wastewater treatment
    economics
    Salts
    solute
    water treatment
    Membranes

    Keywords

    • Economic assessment
    • Modeling
    • Nanofiltration
    • Osmotic effect
    • Rejection

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)
    • Water Science and Technology
    • Mechanical Engineering

    Cite this

    Modelling the effects of nanofiltration membrane properties on system cost assessment for desalination applications. / Mohammad, A. W.; Hilal, Nidal; Al-Zoubib, H.; Darwish, N. A.; Ali, N.

    In: Desalination, Vol. 206, No. 1-3, 05.02.2007, p. 215-225.

    Research output: Contribution to journalArticle

    Mohammad, A. W. ; Hilal, Nidal ; Al-Zoubib, H. ; Darwish, N. A. ; Ali, N. / Modelling the effects of nanofiltration membrane properties on system cost assessment for desalination applications. In: Desalination. 2007 ; Vol. 206, No. 1-3. pp. 215-225.
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