Effect of membrane fouling reducer on cake structure and membrane permeability in membrane bioreactor

Byung Kook Hwang; Woo Nyoung Lee; Pyung Kyu Park; Chung Hak Lee; In Soung Chang

doi:10.1016/j.memsci.2006.11.032

Effect of membrane fouling reducer on cake structure and membrane permeability in membrane bioreactor

Byung Kook Hwang, Woo Nyoung Lee, Pyung Kyu Park, Chung Hak Lee, In Soung Chang

Division of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

108 Citations (Scopus)

Abstract

The nature of the cake formed on a membrane surface is a key factor for understanding membrane fouling phenomenon in membrane bioreactor (MBR) systems. Most studies on membrane fouling have been carried out with the analysis of microbial characteristics in the bulk phase rather than in the cake because the preparation of intact cake specimen is hardly possible. In this study, the cake on a membrane surface in a MBR system was non-destructively examined using confocal laser scanning microscopy (CLSM) and digital image analysis. This CLSM-Image analysis technique was then applied to elucidate the mechanism of significant flux enhancement that occurs when a membrane fouling reducer (MFR) was added to MBR. Even though the cake of the MFR reactor was thicker than that of the control reactor, membrane fouling was decreased primarily as the result of increased cake porosity. The concentration of soluble extra-cellular polymeric substances (EPS) in the MFR reactor was lower, but the bound EPS concentration was higher than that in the control reactor. Cakes formed in the presence vis-à-vis at the absence of MFR were compared in terms of structural features and the spatial distribution of cellular and polymeric cake constituents which were determined using the CLSM data and image analysis.

Original language	English
Pages (from-to)	149-156
Number of pages	8
Journal	Journal of Membrane Science
Volume	288
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2006.11.032
Publication status	Published - 2007 Feb 1

Bibliographical note

Funding Information:
This study was supported in part by the Korean Ministry of Environment through a Grant 2006-07001-0064-1. The authors wish to thank the National Instrumentation Center for Environment Management (NICEM) for allowing us to use the confocal laser scanning microscope system. Membrane fouling reducer (MFR) support from the NALCO is also acknowledged.

All Science Journal Classification (ASJC) codes

Biochemistry
Materials Science(all)
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2006.11.032

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title = "Effect of membrane fouling reducer on cake structure and membrane permeability in membrane bioreactor",

abstract = "The nature of the cake formed on a membrane surface is a key factor for understanding membrane fouling phenomenon in membrane bioreactor (MBR) systems. Most studies on membrane fouling have been carried out with the analysis of microbial characteristics in the bulk phase rather than in the cake because the preparation of intact cake specimen is hardly possible. In this study, the cake on a membrane surface in a MBR system was non-destructively examined using confocal laser scanning microscopy (CLSM) and digital image analysis. This CLSM-Image analysis technique was then applied to elucidate the mechanism of significant flux enhancement that occurs when a membrane fouling reducer (MFR) was added to MBR. Even though the cake of the MFR reactor was thicker than that of the control reactor, membrane fouling was decreased primarily as the result of increased cake porosity. The concentration of soluble extra-cellular polymeric substances (EPS) in the MFR reactor was lower, but the bound EPS concentration was higher than that in the control reactor. Cakes formed in the presence vis-{\`a}-vis at the absence of MFR were compared in terms of structural features and the spatial distribution of cellular and polymeric cake constituents which were determined using the CLSM data and image analysis.",

author = "Hwang, {Byung Kook} and Lee, {Woo Nyoung} and Park, {Pyung Kyu} and Lee, {Chung Hak} and Chang, {In Soung}",

note = "Funding Information: This study was supported in part by the Korean Ministry of Environment through a Grant 2006-07001-0064-1. The authors wish to thank the National Instrumentation Center for Environment Management (NICEM) for allowing us to use the confocal laser scanning microscope system. Membrane fouling reducer (MFR) support from the NALCO is also acknowledged.",

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N2 - The nature of the cake formed on a membrane surface is a key factor for understanding membrane fouling phenomenon in membrane bioreactor (MBR) systems. Most studies on membrane fouling have been carried out with the analysis of microbial characteristics in the bulk phase rather than in the cake because the preparation of intact cake specimen is hardly possible. In this study, the cake on a membrane surface in a MBR system was non-destructively examined using confocal laser scanning microscopy (CLSM) and digital image analysis. This CLSM-Image analysis technique was then applied to elucidate the mechanism of significant flux enhancement that occurs when a membrane fouling reducer (MFR) was added to MBR. Even though the cake of the MFR reactor was thicker than that of the control reactor, membrane fouling was decreased primarily as the result of increased cake porosity. The concentration of soluble extra-cellular polymeric substances (EPS) in the MFR reactor was lower, but the bound EPS concentration was higher than that in the control reactor. Cakes formed in the presence vis-à-vis at the absence of MFR were compared in terms of structural features and the spatial distribution of cellular and polymeric cake constituents which were determined using the CLSM data and image analysis.

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Effect of membrane fouling reducer on cake structure and membrane permeability in membrane bioreactor

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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