Statistical analysis of air-gap membrane desalination experimental data

Hypothesis testing

Azza A. Alcheikhhamdon, Naif A. Darwish, Nidal Hilal

    Research output: Contribution to journalArticle

    Abstract

    Membrane distillation (MD) is a process in which the driving force for mass transfer is temperature gradient rather than conventional ones based on density, static pressure, chemical nature, affinity, and freezing point gradients. Using a porous hydrophobic membrane, MD comes into four configurations; direct contact, air gap, sweeping gas, and vacuum MD. The current technical literature shows a growing interest in experimental investigation of MD processes. In this work, a complete set of experimental data on air gap membrane distillation is analyzed using statistical methods. The experimental data involves a study of the effects of salt concentration on permeate flux for MgCl2, Na2SO4, and NaCl using three commercial membranes in AGMD unit. Hypothesis testing regarding the mean permeation flux under different salt concentrations is implemented. The objective is to gain an idea about the statistical significance of performance differences among these membranes. Several statistical techniques, i.e., F-test, Fisher's LSD test, Bonferroni and Tukey's test for multiple comparisons are applied. The F-test predicts that all three membranes handle the three salts at their low salt concentration levels in a comparable manner with no significant differences in permeate fluxes but handle the same salts differently at the higher level of salt concentrations.

    Original languageEnglish (US)
    Pages (from-to)117-125
    Number of pages9
    JournalDesalination
    Volume362
    DOIs
    StatePublished - Apr 5 2015

    Fingerprint

    hypothesis testing
    Desalination
    desalination
    Statistical methods
    statistical analysis
    membrane
    Membranes
    distillation
    air
    Testing
    Distillation
    Salts
    Air
    salt
    Fluxes
    Lysergic Acid Diethylamide
    Magnesium Chloride
    Permeation
    Freezing
    Thermal gradients

    Keywords

    • Air gap
    • Hypothesis testing
    • Membrane distillation
    • Multiple comparisons
    • Permeate flux

    ASJC Scopus subject areas

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

    Cite this

    Statistical analysis of air-gap membrane desalination experimental data : Hypothesis testing. / Alcheikhhamdon, Azza A.; Darwish, Naif A.; Hilal, Nidal.

    In: Desalination, Vol. 362, 05.04.2015, p. 117-125.

    Research output: Contribution to journalArticle

    Alcheikhhamdon, Azza A. ; Darwish, Naif A. ; Hilal, Nidal. / Statistical analysis of air-gap membrane desalination experimental data : Hypothesis testing. In: Desalination. 2015 ; Vol. 362. pp. 117-125.
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