A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization

Eui-Jong Lee; Alicia K. J. An; Pejman Hadi; Dickson Y. S. Yan; Hyung-Sook Kim

doi:10.1080/08927014.2016.1140746

A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization

Eui-Jong Lee
, Alicia K. J. An^*
, Pejman Hadi
, Dickson Y. S. Yan
, Hyung-Sook Kim

^*Corresponding author for this work

School of Energy and Environment

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

13 Citations (Scopus)

Abstract

This study aimed at unfolding the role and mechanisms of chemically enhanced cleaning-in-place (CIP) regimes in fouling control of polytetrafluoroethylene (PTFE) made flat sheet (FS) membrane bio-reactors (MBRs). The trans-membrane pressure (TMP) was successfully maintained below 10 kPa using a daily CIP regime consisting of 100 to 600 mg l⁻¹ of NaOCl and cake layer resistance control was shown to be critical for effective high-flux MBR operation. In contrast, in the control unit without the CIP, the TMP exceeded 35 kPa at a flux of 40 LMH. The extracellular polymeric substances associated with proteins (EPS_protein) were also controlled effectively with a daily application of the CIP to the fouled membrane. Moreover, the CIP prompted a thinner and looser bio-cake layer on the membrane surface, suggesting that in situ CIP can be a favorable method to control FS membrane fouling at high-flux MBR operation.

Original language	English
Pages (from-to)	301-312
Journal	Biofouling
Volume	32
Issue number	3
Online published	24 Feb 2016
DOIs	https://doi.org/10.1080/08927014.2016.1140746
Publication status	Published - 2016

Research Keywords

Bio-cake layer
cleaning-in-place
extracellular polymeric substances
membrane bioreactor
membrane fouling

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title = "A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization",

abstract = "This study aimed at unfolding the role and mechanisms of chemically enhanced cleaning-in-place (CIP) regimes in fouling control of polytetrafluoroethylene (PTFE) made flat sheet (FS) membrane bio-reactors (MBRs). The trans-membrane pressure (TMP) was successfully maintained below 10 kPa using a daily CIP regime consisting of 100 to 600 mg l−1 of NaOCl and cake layer resistance control was shown to be critical for effective high-flux MBR operation. In contrast, in the control unit without the CIP, the TMP exceeded 35 kPa at a flux of 40 LMH. The extracellular polymeric substances associated with proteins (EPSprotein) were also controlled effectively with a daily application of the CIP to the fouled membrane. Moreover, the CIP prompted a thinner and looser bio-cake layer on the membrane surface, suggesting that in situ CIP can be a favorable method to control FS membrane fouling at high-flux MBR operation.",

keywords = "Bio-cake layer, cleaning-in-place, extracellular polymeric substances, membrane bioreactor, membrane fouling",

author = "Eui-Jong Lee and An, \{Alicia K. J.\} and Pejman Hadi and Yan, \{Dickson Y. S.\} and Hyung-Sook Kim",

year = "2016",

doi = "10.1080/08927014.2016.1140746",

language = "English",

volume = "32",

pages = "301--312",

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T1 - A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane

T2 - fouling mitigation and membrane characterization

AU - Lee, Eui-Jong

AU - An, Alicia K. J.

AU - Hadi, Pejman

AU - Yan, Dickson Y. S.

AU - Kim, Hyung-Sook

PY - 2016

Y1 - 2016

N2 - This study aimed at unfolding the role and mechanisms of chemically enhanced cleaning-in-place (CIP) regimes in fouling control of polytetrafluoroethylene (PTFE) made flat sheet (FS) membrane bio-reactors (MBRs). The trans-membrane pressure (TMP) was successfully maintained below 10 kPa using a daily CIP regime consisting of 100 to 600 mg l−1 of NaOCl and cake layer resistance control was shown to be critical for effective high-flux MBR operation. In contrast, in the control unit without the CIP, the TMP exceeded 35 kPa at a flux of 40 LMH. The extracellular polymeric substances associated with proteins (EPSprotein) were also controlled effectively with a daily application of the CIP to the fouled membrane. Moreover, the CIP prompted a thinner and looser bio-cake layer on the membrane surface, suggesting that in situ CIP can be a favorable method to control FS membrane fouling at high-flux MBR operation.

AB - This study aimed at unfolding the role and mechanisms of chemically enhanced cleaning-in-place (CIP) regimes in fouling control of polytetrafluoroethylene (PTFE) made flat sheet (FS) membrane bio-reactors (MBRs). The trans-membrane pressure (TMP) was successfully maintained below 10 kPa using a daily CIP regime consisting of 100 to 600 mg l−1 of NaOCl and cake layer resistance control was shown to be critical for effective high-flux MBR operation. In contrast, in the control unit without the CIP, the TMP exceeded 35 kPa at a flux of 40 LMH. The extracellular polymeric substances associated with proteins (EPSprotein) were also controlled effectively with a daily application of the CIP to the fouled membrane. Moreover, the CIP prompted a thinner and looser bio-cake layer on the membrane surface, suggesting that in situ CIP can be a favorable method to control FS membrane fouling at high-flux MBR operation.

KW - Bio-cake layer

KW - cleaning-in-place

KW - extracellular polymeric substances

KW - membrane bioreactor

KW - membrane fouling

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U2 - 10.1080/08927014.2016.1140746

DO - 10.1080/08927014.2016.1140746

M3 - RGC 21 - Publication in refereed journal

SN - 0892-7014

VL - 32

SP - 301

EP - 312

JO - Biofouling

JF - Biofouling

IS - 3

ER -

A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization

Abstract

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