Filtrate quality from different filter operations

Robert I. Mackie, Michal Zielina, Wojciech Dąbrowski

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    A brief review of the literature on filtrate quality obtained in constant and variable declining rate operation systems is presented, with the general conclusion that both systems usually produce filtrate of similar quality, assuming the flow-rate controllers in the constant flow rate system operate properly. A mathematical model of CR (constant rate) filters and VDR (variable declining rate) filters based on the model by Mackie and Zhao (1999) has been described and used to investigate filtrate quality under different operating conditions. A similar quality of filtrate was achieved in computations carried out for both modes of operation, while the total head loss was much lower in the VDR mode. For the same time of filter runs slightly better filtration quality resulted from CR operation, but for different filter runs resulting from the same head loss of flow just before a backwash, the VDR control system produced lower turbidity filtrate.

    Original languageEnglish
    Pages (from-to)25-35
    Number of pages11
    JournalActa Hydrochimica et Hydrobiologica
    Volume31
    Issue number1
    DOIs
    Publication statusPublished - Jul 2003

    Keywords

    • DECLINING-RATE FILTRATION
    • deep bed filtration
    • water treatment
    • non-homogeneous suspension solids
    • unit bed element model
    • variable declining rate filter
    • CONSTANT-RATE

    Cite this

    Mackie, Robert I. ; Zielina, Michal ; Dąbrowski, Wojciech. / Filtrate quality from different filter operations. In: Acta Hydrochimica et Hydrobiologica. 2003 ; Vol. 31, No. 1. pp. 25-35.
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    abstract = "A brief review of the literature on filtrate quality obtained in constant and variable declining rate operation systems is presented, with the general conclusion that both systems usually produce filtrate of similar quality, assuming the flow-rate controllers in the constant flow rate system operate properly. A mathematical model of CR (constant rate) filters and VDR (variable declining rate) filters based on the model by Mackie and Zhao (1999) has been described and used to investigate filtrate quality under different operating conditions. A similar quality of filtrate was achieved in computations carried out for both modes of operation, while the total head loss was much lower in the VDR mode. For the same time of filter runs slightly better filtration quality resulted from CR operation, but for different filter runs resulting from the same head loss of flow just before a backwash, the VDR control system produced lower turbidity filtrate.",
    keywords = "DECLINING-RATE FILTRATION, deep bed filtration, water treatment, non-homogeneous suspension solids, unit bed element model, variable declining rate filter, CONSTANT-RATE",
    author = "Mackie, {Robert I.} and Michal Zielina and Wojciech Dąbrowski",
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    Filtrate quality from different filter operations. / Mackie, Robert I.; Zielina, Michal; Dąbrowski, Wojciech.

    In: Acta Hydrochimica et Hydrobiologica, Vol. 31, No. 1, 07.2003, p. 25-35.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Filtrate quality from different filter operations

    AU - Mackie, Robert I.

    AU - Zielina, Michal

    AU - Dąbrowski, Wojciech

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    AB - A brief review of the literature on filtrate quality obtained in constant and variable declining rate operation systems is presented, with the general conclusion that both systems usually produce filtrate of similar quality, assuming the flow-rate controllers in the constant flow rate system operate properly. A mathematical model of CR (constant rate) filters and VDR (variable declining rate) filters based on the model by Mackie and Zhao (1999) has been described and used to investigate filtrate quality under different operating conditions. A similar quality of filtrate was achieved in computations carried out for both modes of operation, while the total head loss was much lower in the VDR mode. For the same time of filter runs slightly better filtration quality resulted from CR operation, but for different filter runs resulting from the same head loss of flow just before a backwash, the VDR control system produced lower turbidity filtrate.

    KW - DECLINING-RATE FILTRATION

    KW - deep bed filtration

    KW - water treatment

    KW - non-homogeneous suspension solids

    KW - unit bed element model

    KW - variable declining rate filter

    KW - CONSTANT-RATE

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