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Fouling control of a ceramic microfiltration membrane for direct sewer mining by backwashing with ozonated water

Journal Article


Abstract


  • Backwashing using ozonated water was investigated to control fouling during direct sewer mining using

    a ceramic microfiltration (MF) membrane. Primarily treated municipal wastewater was filtered and backwashing

    was performed using RO filtered tap water in this study. Direct MF filtration in the dead-end filtration

    mode using the ceramic MF membrane resulted in fouling that could not be fully removed by

    conventional backwashing. A steady increase in transmembrane pressure (TMP) was observed after each

    filtration cycle and could be attributed mostly to cake formation. In contrast, backwashing using ozonated

    water for 2.5 min was effective at removing the fouling cake layer; thus, resulting in a stable TMP

    value after multiple filtration cycles. The effectiveness of ozonated water backwashing could be enhanced

    by extending the backwashing time. Indeed, the permeability of a heavily fouled membrane was fully

    restored after 3.5 min of ozonated water backwashing. Results reported here suggest that backwashing

    using ozonated water has the ability to remove most foulants deposited on the membrane surface and

    can be used for sewer mining, where severe cake formation occurs.

Publication Date


  • 2015

Citation


  • Fujioka, T. & Nghiem, L. D. (2015). Fouling control of a ceramic microfiltration membrane for direct sewer mining by backwashing with ozonated water. Separation and Purification Technology, 142 268-273.

Scopus Eid


  • 2-s2.0-84921624932

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3781

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 268

End Page


  • 273

Volume


  • 142

Place Of Publication


  • United Kingdom

Abstract


  • Backwashing using ozonated water was investigated to control fouling during direct sewer mining using

    a ceramic microfiltration (MF) membrane. Primarily treated municipal wastewater was filtered and backwashing

    was performed using RO filtered tap water in this study. Direct MF filtration in the dead-end filtration

    mode using the ceramic MF membrane resulted in fouling that could not be fully removed by

    conventional backwashing. A steady increase in transmembrane pressure (TMP) was observed after each

    filtration cycle and could be attributed mostly to cake formation. In contrast, backwashing using ozonated

    water for 2.5 min was effective at removing the fouling cake layer; thus, resulting in a stable TMP

    value after multiple filtration cycles. The effectiveness of ozonated water backwashing could be enhanced

    by extending the backwashing time. Indeed, the permeability of a heavily fouled membrane was fully

    restored after 3.5 min of ozonated water backwashing. Results reported here suggest that backwashing

    using ozonated water has the ability to remove most foulants deposited on the membrane surface and

    can be used for sewer mining, where severe cake formation occurs.

Publication Date


  • 2015

Citation


  • Fujioka, T. & Nghiem, L. D. (2015). Fouling control of a ceramic microfiltration membrane for direct sewer mining by backwashing with ozonated water. Separation and Purification Technology, 142 268-273.

Scopus Eid


  • 2-s2.0-84921624932

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3781

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 268

End Page


  • 273

Volume


  • 142

Place Of Publication


  • United Kingdom