Coagulation Pretreatment for Ultrafiltration of a Surface Water

Lahoussine-Turcaud, V.; Wiesner, Mark R.; Bottero, Jean‐Yves; Mallevialle, J.

doi:10.1002/j.1551-8833.1990.tb07070.x

Cited by 73 publications

(18 citation statements)

References 17 publications

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“…Application of an integrated process composed of coagulation and MF or UF results in higher NOM removal and lower coagulant dosage [9][10][11][12][13][14][15][16]. This effect is obtained due to the fact that the conditions of coagulation and the coagulant selection can be optimised, specially forNOM removal, for particle removal is assured.…”

Section: Membrane Filtrationmentioning

confidence: 99%

Application of ultrafiltration integrated with coagulation for improved NOM removal

Kabsch-Korbutowicz

2005

Desalination

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Section: Membrane Filtrationmentioning

confidence: 99%

Application of ultrafiltration integrated with coagulation for improved NOM removal

Kabsch-Korbutowicz

2005

Desalination

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“…For this purpose, information on constituents that cause R irr is indispensable. Natural organic matter (NOM), composed of humic substances as well as non-humic materials, contained in natural water has been demonstrated in a number of studies to be the foulant that causes membrane fouling (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). NOM represents a wide range of macro-molecular organic compounds.…”

Section: Introductionmentioning

confidence: 99%

Irreversible Fouling in MF/UF Membranes Caused by Natural Organic Matters (NOMs) Isolated from Different Origins

Kimura

Yamamura

Watanabe

2006

Separation Science and Technology

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For more efficient use of membrane technology in water treatment, it is essential to understand more about the fouling that requires chemical cleaning to be eliminated (i.e., irreversible fouling). In this study, five different MF/UF membranes and four types of organic matter collected from different origins were examined in terms of the degree of irreversible membrane fouling. Experimental results demonstrated that the extent of irreversible fouling differed significantly depending on the properties of both the membrane and organic matter. Among the tested membranes, UF membranes made of polyacrylonitrile (PAN) exhibited the best performance in terms of prevention of irreversible fouling. In contrast, MF membranes, especially one made of polyvinylidenefluoride (PVDF), suffered significant irreversible fouling. Conventional methods for characterization of organic matter such as specific ultraviolet absorption (SUVA), XAD fractionation, and excitation-emission matrix (EEM) were found to be inadequate for prediction of the degree of irreversible fouling. This is because these analytical methods represent an average property of bulk organic matter, while the fouling was actually caused by some specific fractions. It was revealed that hydrophilic fraction of the organic matter was responsible for the irreversible fouling regardless of the type of membranes or organic matter.

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“…Small particles that might otherwise pass through settling basins, and perhaps even packed-bed filters, can be removed by membrane filters. This allows for greater flexibility and economy in the use of coagulant (Lahoussine et al, 1990a;Lahoussine et al, 1990b;O1ivieri and Picher, 1991).…”

Section: Water Qualitymentioning

confidence: 99%

Impacts of coagulation pretreatment on MF filtration and a comparative study of different membrane module types

Liu

Kim

Yun

et al. 2006

J Ocean Univ. China

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Changes in the regulatory requirements and the forthcoming Disinfectant/Disinfection By-Products (D/DBP) Rule will require that drinking water treatment facilities be operated to achieve maximum removals of particles and disinfectant tolerant microorganisms as well as natural organic matter (NOM). For drinking water production, the use of membrane filtration processes such as microfiltration and ultrafiltration (MF/UF) alone to satisfy the turbidity, particle and microorganism removal a requirement of the surface water treatment regulation (SWTR) is not enough. MF/UF treatment processes can achieve only nominal (10 percent) removal of disinfection by-products (DBP) precursors (James, et al., 1995). On the other hand, too fast fouling can make the filtration processes more difficult to carry on. To solve these problems, many authors have been interested in installing coagulation pretreatment before membrane filtration to improve membrane performance. However, previous studies reported conflicting results. Some supported the effectiveness of coagulation pretreatment, while others contended that coagulation aggravated membrane performance. This research aims to identify the effects of coagulation pretreatment on membrane filtration through a pilot study using PVDF membrane in combination with analyzing the rationale of coagulation. Another objective of this research was to evaluate the different impacts on membrane performance of using different membrane modules (the submerged module and pressured module). The results showed that coagulation pretreatment greatly improved the membrane performance, extending the filtration time as well as reducing the permeated organic level, and that the submerged module is much more efficient than the pressured module.

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Coagulation Pretreatment for Ultrafiltration of a Surface Water

Cited by 73 publications

References 17 publications

Application of ultrafiltration integrated with coagulation for improved NOM removal

Application of ultrafiltration integrated with coagulation for improved NOM removal

Irreversible Fouling in MF/UF Membranes Caused by Natural Organic Matters (NOMs) Isolated from Different Origins

Impacts of coagulation pretreatment on MF filtration and a comparative study of different membrane module types

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