Membrane fouling in a submerged membrane bioreactor using track-etched and phase-inversed porous membranes

Choi, Jasmine; Park, Se-Keun; Ng, Henry

doi:10.1016/j.seppur.2008.10.019

“…However, for PVDF and PES hollow fiber membranes, the fouling propensity decreased sharply with increased pore size. This is in agreement with other research results [18,21,29,30]. Marel et al [31] reported that PVDF with large pores showed greatly reduced membrane fouling in submerged membrane bioreactors.…”

Section: Effects Of Membrane Pore Size On Membrane Foulingsupporting

confidence: 93%

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Jeon

¹

,

Rajabzadeh

²

,

Okamura

³

et al. 2016

Water

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Abstract:We aimed to investigate the relationship between membrane material and the development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polyethersulfone (PES), and polyvinylidene fluoride (PVDF) with activated sludge taken from a municipal wastewater treatment plant. The three UF hollow fiber membranes were prepared by a non-solvent-induced phase separation method and had similar water permeabilities and pore sizes. The results revealed that transmembrane pressure (TMP) increased more sharply for the hydrophobic PVDF membrane than for the hydrophilic CA membrane in batch filtration tests, even when membranes with similar permeabilities and pore sizes were used. PVDF hollow fiber membranes with smaller pores had greater fouling propensity than those with larger pores. In contrast, CA hollow fiber membranes showed good mitigation of membrane fouling regardless of pore size. The results obtained in this study suggest that the surface hydrophilicity and pore size of UF membranes clearly affect the fouling properties in MBR operation when using activated sludge.

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“…InFigure 6, roughness correlated to the degree of physically irreversible fouling in the case of MF membranes (A, D and E), implying that roughness is also an important factor in the evolution of physically irreversible fouling. Contact angle and pure water permeability can also be correlated to the degree of physically irreversible fouling in all membranes except for membrane D, which has the highest roughness among the four membranes tested Choi et al (2009). reported that a membrane with low pure water permeability is expected to cause more fouling due to quick compaction of the fouling layer and pore clogging, which could provide an explanation of the results obtained in this study.…”

supporting

confidence: 58%

Influence of membrane properties on physically reversible and irreversible fouling in membrane bioreactors

Tsuyuhara

¹

,

Hanamoto

²

,

Miyoshi

³

et al. 2010

Water Science and Technology

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This study aimed to examine the impact of membrane properties on membrane fouling in membrane bioreactor (MBR). Membrane fouling was divided into two categories: physically reversible and irreversible fouling. Membrane properties related to each type of membrane fouling were investigated separately. Five microfiltration (MF) and one ultrafiltration (UF) membranes with different properties (pore size, contact angle, roughness, zeta potential, and pure water permeability) were examined with a laboratory-scale MBR, fed with synthetic wastewater. Two separate experiments were conducted: the first to examine physically reversible fouling, and the second to examine physically irreversible fouling. The correlation between the degree of each type of fouling and membrane properties was studied. High correlation was observed between the degree of physically reversible fouling and roughness (R(2)=0.96). In contrast, with regard to physically irreversible fouling, strong correlation between roughness and degree of membrane fouling can only be found in the case of MF membranes. Except for the membrane with the highest roughness, the degree of physically irreversible fouling can be well correlated with pure water permeability (lower pure water permeability results in higher degree of physically irreversible fouling) including UF membrane. On the basis of the results obtained in this study, it can be concluded that roughness is an important factor in determination of physically reversible fouling regardless of the types of membrane (i.e. MF or UF membranes) and evolutions of physically irreversible fouling can be mitigated when an MBR is operated with membranes with smooth surface and high pure water permeability.

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“…However, for PVDF and PES hollow fiber membranes, the fouling propensity decreased sharply with increased pore size. This is in agreement with other research results [18,[26][27][28]. Marel et al [29] reported that PVDF with large pores showed greatly reduced membrane fouling in submerged membrane bioreactors.…”

Section: Effects Of Membrane Pore Size On Membrane Foulingsupporting

confidence: 93%

“…For example, Matar et al [17] studied the effect of hydrophobic and hydrophilic membrane surfaces in MBR, and their results showed that fouling behavior in MBR processes are much less dependent on hydrophilicity than previously thought. Choi et al [18] reported that pore structure had a greater influence on the development of membrane fouling than the hydrophilicity of the membrane surface. As such, it is still debatable whether or not the hydrophilicity of the membrane affects membrane fouling mitigation.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Jeon

¹

,

Rajabzadeh

²

,

Okamura

³

et al. 2016

Preprint

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Abstract:We aimed to investigate the relationship between membrane material and the development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polyethersulfone (PES), and polyvinylidene fluoride (PVDF) with activated sludge taken from a municipal wastewater treatment plant. The three UF hollow fiber membranes were prepared by a non-solvent-induced phase separation method and had similar water permeabilities and pore sizes. The results revealed that transmembrane pressure (TMP) increased more sharply for the hydrophobic PVDF membrane than for the hydrophilic CA membrane in batch filtration tests, even when membranes with similar permeabilities and pore sizes were used. PVDF hollow fiber membranes with smaller pores had greater fouling propensity than those with larger pores. In contrast, CA hollow fiber membranes showed good mitigation of membrane fouling regardless of pore size. The results obtained in this study suggest that the surface hydrophilicity and pore size of UF membranes clearly affect the fouling properties in MBR operation when using activated sludge.

show abstract

Membrane fouling in a submerged membrane bioreactor using track-etched and phase-inversed porous membranes

Cited by 47 publications

References 33 publications

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Influence of membrane properties on physically reversible and irreversible fouling in membrane bioreactors

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

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