The fouling of microfiltration membranes by NOM after coagulation treatment

Carroll, T; King, Stephen P.; Gray, Stephen; Bolto, B.A.; Booker, N. A.

doi:10.1016/s0043-1354(00)00051-8

Cited by 344 publications

(130 citation statements)

References 22 publications

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“…Two methods, variations of the published procedure (Carroll et al 2000), were used to isolate different components from the NOM. Procedure A is identical to the fraction procedure used before except that it further divides the hydrophilic neutral fraction into two sub-fractions: hydrophobic bases (HB) and residual hydrophilics (Res).…”

Section: Methodsmentioning

confidence: 99%

“…The use of NOM fractions from Moorabool River, near Anakie in south eastern Australia to test which types of compounds are responsible for MF membrane fouling revealed that for a polypropylene (PP) hollow fibre system, the neutral hydrophilic fraction was the most strongly implicated (Carroll et al 2000). There was a 40% decrease in flux after a throughput that caused only a 20% decrease for the other fractions -the strongly and weakly hydrophobic acids and charged hydrophilic material.…”

Section: Introduction 28mentioning

confidence: 99%

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Effect of NOM characteristics and membrane type on microfiltration performance

Gray

Ritchie²,

Tran

et al. 2007

Water Research

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Efforts to understand and predict the role of different organic fractions in the fouling of low-pressure membranes are presented. Preliminary experiments with an experimental apparatus that incorporates automatic backwashing and filtration over several days has shown that microfiltration of the hydrophilic fractions leads to rapid flux decline and the formation of a cake or gel layer, while the hydrophobic fractions show a steady flux decline and no obvious formation of a gel or cake layer. The addition of calcium to the weakly hydrophobic acid (WHA) fraction led to the formation of a gel layer from associations between components of the WHA. The dominant foulants were found to be the neutral and charged hydrophilic compounds, with hydrophobic and small pore size membranes being the most readily fouled. The findings suggest that surface analyses such as FTIR will preferentially identify hydrophilic compounds as the main foulants, as these components form a gel layer on the surface while the hydrophobic compounds adsorb within the membrane pores.Furthermore, coagulation pre-treatment is also likely to reduce fouling by reducing pore constriction rather than the formation of a gel layer, as coagulants remove the hydrophobic compounds to a large extent and very little of the hydrophilic neutral components.

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Section: Methodsmentioning

confidence: 99%

Section: Introduction 28mentioning

confidence: 99%

Effect of NOM characteristics and membrane type on microfiltration performance

Gray

Ritchie²,

Tran

et al. 2007

Water Research

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show abstract

“…Madrona (2010) used coagulation/ flocculation with moringa, followed by MF with ceramic membranes with porosity of 0.1 and 0.2 μm, for the treatment of surface water and observed fouling percentages of around 94% during the filtration of raw water and slightly lower values, around 88%, when water previously coagulated/flocculated with moringa was filtered. Carroll et al (2000) used polypropylene hollow fiber MF membrane to filter surface water from the Moorabool River, Australia, and observed fouling percentages of 80% for water without pretreatment and 50% for water pretreated by coagulation with alum.…”

Section: Results Obtained In Microfiltration Process (Mf) and Coagulamentioning

confidence: 99%

Application of Hybrid Process of Coagulation/Flocculation and Membrane Filtration for the Removal of Protozoan Parasites from Water

Nishi¹,

Vieira²,

Falavigna-Guilherme³

et al. 2013

Water Treatment

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“…Madrona (2010) used coagulation/ flocculation with moringa, followed by MF with ceramic membranes with porosity of 0.1 and 0.2 µm, for the treatment of surface water and observed fouling percentages of around 94% during the filtration of raw water and slightly lower values, around 88%, when water previously coagulated/flocculated with moringa was filtered. Carroll et al (2000) used polypropylene hollow fiber MF membrane to filter surface water from the Moorabool River, Australia, and observed fouling percentages of 80% for water without pretreatment and 50% for water pretreated by coagulation with alum.…”

Section: Ecological Water Quality -Water Treatment and Reusementioning

confidence: 99%