New disinfectant to control biofouling of polyamide reverse osmosis membrane

Jihyun Yu; Youngbin Baek; Hongsik Yoon; Jeyong Yoon

doi:10.1016/j.memsci.2012.09.057

New disinfectant to control biofouling of polyamide reverse osmosis membrane

Jihyun Yu, Youngbin Baek, Hongsik Yoon, Jeyong Yoon

Seoul National University

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

31 Scopus citations

Abstract

Biofouling control in the polyamide RO membrane process has been restricted since the membranes are vulnerable to chlorine which is an effective disinfectant for water treatment. Chlorine eventually decreases salt rejection and shortens membrane life expectancy. This study investigated dichloroisocyanurate (DCC) for biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. The evaluation of DCC consisted of membrane performance tests and antimicrobial effect in comparison with those of chlorine under the identical conditions. Permeate flux, salt rejection, and surface characterization were examined as membrane performance indicators after exposure to disinfectants. The antimicrobial effect of DCC was investigated on biofilm grown on membrane surface. The results showed that normalized salt rejections of DCC-exposed membranes were stably kept at 99% without the sacrifice of flux, while those of chlorine-exposed membranes decreased to 80%. The biofilms grown on RO membrane were inactivated by DCC as much as chlorine. This study suggests the excellent possibility of DCC usage for biofouling control in RO process.

Original language	English
Pages (from-to)	30-36
Number of pages	7
Journal	Journal of Membrane Science
Volume	427
DOIs	https://doi.org/10.1016/j.memsci.2012.09.057
State	Published - 5 Jan 2013
Externally published	Yes

Bibliographical note

Funding Information:
This study reports a new promising chloramine based disinfectant, DCC, for the purpose of biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. Although polyamide RO membrane was exposed to high DCC solution, DCC-exposed membranes in RO process showed very excellent results in terms of permeate flux and salt rejection. RO membranes exposed to highly concentrated DCC (5000 mg/L) maintained stable permeate flux and superior salt rejection (99%), while chlorine-exposed membranes did not. The superior integrity of DCC-exposed membrane was also supported by FTIR and XPS. Furthermore, DCC was shown to possess better biofilm inactivation than chlorine under the same TAC concentration, showing promising use for biofouling control in RO process.

Keywords

Antimicrobial effect
Biofouling
Chloramine
Chlorine
Dichloroisocyanurate (DCC)
Polyamide RO membrane

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.memsci.2012.09.057

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title = "New disinfectant to control biofouling of polyamide reverse osmosis membrane",

abstract = "Biofouling control in the polyamide RO membrane process has been restricted since the membranes are vulnerable to chlorine which is an effective disinfectant for water treatment. Chlorine eventually decreases salt rejection and shortens membrane life expectancy. This study investigated dichloroisocyanurate (DCC) for biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. The evaluation of DCC consisted of membrane performance tests and antimicrobial effect in comparison with those of chlorine under the identical conditions. Permeate flux, salt rejection, and surface characterization were examined as membrane performance indicators after exposure to disinfectants. The antimicrobial effect of DCC was investigated on biofilm grown on membrane surface. The results showed that normalized salt rejections of DCC-exposed membranes were stably kept at 99% without the sacrifice of flux, while those of chlorine-exposed membranes decreased to 80%. The biofilms grown on RO membrane were inactivated by DCC as much as chlorine. This study suggests the excellent possibility of DCC usage for biofouling control in RO process.",

keywords = "Antimicrobial effect, Biofouling, Chloramine, Chlorine, Dichloroisocyanurate (DCC), Polyamide RO membrane",

author = "Jihyun Yu and Youngbin Baek and Hongsik Yoon and Jeyong Yoon",

note = "Funding Information: This study reports a new promising chloramine based disinfectant, DCC, for the purpose of biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. Although polyamide RO membrane was exposed to high DCC solution, DCC-exposed membranes in RO process showed very excellent results in terms of permeate flux and salt rejection. RO membranes exposed to highly concentrated DCC (5000 mg/L) maintained stable permeate flux and superior salt rejection (99%), while chlorine-exposed membranes did not. The superior integrity of DCC-exposed membrane was also supported by FTIR and XPS. Furthermore, DCC was shown to possess better biofilm inactivation than chlorine under the same TAC concentration, showing promising use for biofouling control in RO process. ",

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AU - Yu, Jihyun

AU - Baek, Youngbin

AU - Yoon, Hongsik

AU - Yoon, Jeyong

N1 - Funding Information: This study reports a new promising chloramine based disinfectant, DCC, for the purpose of biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. Although polyamide RO membrane was exposed to high DCC solution, DCC-exposed membranes in RO process showed very excellent results in terms of permeate flux and salt rejection. RO membranes exposed to highly concentrated DCC (5000 mg/L) maintained stable permeate flux and superior salt rejection (99%), while chlorine-exposed membranes did not. The superior integrity of DCC-exposed membrane was also supported by FTIR and XPS. Furthermore, DCC was shown to possess better biofilm inactivation than chlorine under the same TAC concentration, showing promising use for biofouling control in RO process.

PY - 2013/1/5

Y1 - 2013/1/5

N2 - Biofouling control in the polyamide RO membrane process has been restricted since the membranes are vulnerable to chlorine which is an effective disinfectant for water treatment. Chlorine eventually decreases salt rejection and shortens membrane life expectancy. This study investigated dichloroisocyanurate (DCC) for biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. The evaluation of DCC consisted of membrane performance tests and antimicrobial effect in comparison with those of chlorine under the identical conditions. Permeate flux, salt rejection, and surface characterization were examined as membrane performance indicators after exposure to disinfectants. The antimicrobial effect of DCC was investigated on biofilm grown on membrane surface. The results showed that normalized salt rejections of DCC-exposed membranes were stably kept at 99% without the sacrifice of flux, while those of chlorine-exposed membranes decreased to 80%. The biofilms grown on RO membrane were inactivated by DCC as much as chlorine. This study suggests the excellent possibility of DCC usage for biofouling control in RO process.

AB - Biofouling control in the polyamide RO membrane process has been restricted since the membranes are vulnerable to chlorine which is an effective disinfectant for water treatment. Chlorine eventually decreases salt rejection and shortens membrane life expectancy. This study investigated dichloroisocyanurate (DCC) for biofouling control in polyamide RO membrane process which could be employed to be a CIP agent or a disinfectant in pretreatment. The evaluation of DCC consisted of membrane performance tests and antimicrobial effect in comparison with those of chlorine under the identical conditions. Permeate flux, salt rejection, and surface characterization were examined as membrane performance indicators after exposure to disinfectants. The antimicrobial effect of DCC was investigated on biofilm grown on membrane surface. The results showed that normalized salt rejections of DCC-exposed membranes were stably kept at 99% without the sacrifice of flux, while those of chlorine-exposed membranes decreased to 80%. The biofilms grown on RO membrane were inactivated by DCC as much as chlorine. This study suggests the excellent possibility of DCC usage for biofouling control in RO process.

KW - Antimicrobial effect

KW - Biofouling

KW - Chloramine

KW - Chlorine

KW - Dichloroisocyanurate (DCC)

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ER -

New disinfectant to control biofouling of polyamide reverse osmosis membrane

Abstract

Bibliographical note

Keywords

UN SDGs

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