Removal of oil from oil-water emulsion by hybrid coagulation/sand filter as pre-treatment

Abdullah Almojjly, Daniel Johnson, Darren L. Oatley-Radcliffe, Nidal Hilal

    Research output: Contribution to journalArticle

    Abstract

    The removal of oil from water is of increasing importance in many industries, such as oil and gas, petrochemical and food industries, because of the large volumes of oily wastewater they produce. The aim of this work is to evaluate and compare the performance of ferrous and aluminium sulfate coagulations and to compare between sand filter, coagulation and a hybrid coagulation/sand filter process when used as pre-treatment options. When the concentration of oil was low in the oil-water emulsion, the treatment by sand filter alone was adequate (oil ≤50 mg/L). On the other hand, when the oil concentration was greater than 50 mg/L, advanced treatments such as coagulation are required as post-processes to reach good water quality. Aluminium sulfate was observed to be more efficient (about 5% to 7% higher than the use of ferrous sulfate) and less costly than ferrous sulfate to remove oil from oil-water emulsion using coagulation. The optimal technology for pre-treatment to remove oil from oil-water emulsion was found to be a coagulant dosage of aluminium sulfate combined with sand filter at pH 8 during various concentrations as hybrid. Optimal conditions were found to occur at mixing duration and speed of 120 s and 250 rpm respectively.

    Original languageEnglish (US)
    Pages (from-to)17-27
    Number of pages11
    JournalJournal of Water Process Engineering
    Volume26
    DOIs
    StatePublished - Dec 1 2018

    Fingerprint

    emulsion
    Coagulation
    Emulsions
    coagulation
    Oils
    ferrous sulfate
    Sand
    filter
    sand
    Water
    oil
    sulfate
    water
    aluminum
    Aluminum
    removal
    Coagulants
    Water Purification
    Food Industry
    Water Quality

    Keywords

    • Coagulation
    • Emulsion
    • Industrial wastewater
    • Pre-treatment
    • Sand filter
    • Zeta potential

    ASJC Scopus subject areas

    • Biotechnology
    • Safety, Risk, Reliability and Quality
    • Waste Management and Disposal
    • Process Chemistry and Technology

    Cite this

    Removal of oil from oil-water emulsion by hybrid coagulation/sand filter as pre-treatment. / Almojjly, Abdullah; Johnson, Daniel; Oatley-Radcliffe, Darren L.; Hilal, Nidal.

    In: Journal of Water Process Engineering, Vol. 26, 01.12.2018, p. 17-27.

    Research output: Contribution to journalArticle

    Almojjly, Abdullah ; Johnson, Daniel ; Oatley-Radcliffe, Darren L. ; Hilal, Nidal. / Removal of oil from oil-water emulsion by hybrid coagulation/sand filter as pre-treatment. In: Journal of Water Process Engineering. 2018 ; Vol. 26. pp. 17-27.
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