Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate

Byung Soo Oh; Sang Geun Oh; Yeon Jung Jung; Yun Young Hwang; Joon Wun Kang; In S. Kim

doi:10.5004/dwt.2010.1780

Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate

Byung Soo Oh, Sang Geun Oh, Yeon Jung Jung, Yun Young Hwang, Joon Wun Kang, In S. Kim

Division of Environmental Engineering

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

22 Citations (Scopus)

Abstract

This study evaluated the possibility of an electrochemical process as a pre-treatment of a seawater reverse osmosis (SWRO) desalination plant. Initially, during electrolysis of seawater the formation trend of free chlorine was observed and then inactivation rate of Bacillus sp. isolate obtained from natural seawater was measured to evaluate the potential for reducing biofouling of SWRO membrane. As a result, the Bacillus sp. spores present in seawater were completely inactivated at approx. 210 s of electrolysis time, showing 2.4-time higher inactivation rate compared to chlorination alone. This study also investigated the formation trend of perchlorate (ClO⁻₄) during electrolysis of seawater and its rejection by microfi ltration and the SWRO membrane. After 5 min of electrolysis, 27 μg/L of ClO⁻₄ was produced. It was also found that 20% and 98% rejection efficiencies of ClO⁻₄ were observed through microfi ltration and SWRO filtration. The optimum condition of the electrochemical process as a pre-treatment in the seawater desalination plant was determined to be ~4 min of electrolysis time and 110 mA/cm² of current density under the tested natural seawater condition.

Original language	English
Pages (from-to)	245-250
Number of pages	6
Journal	Desalination and Water Treatment
Volume	18
Issue number	1-3
DOIs	https://doi.org/10.5004/dwt.2010.1780
Publication status	Published - 2010 Jun

Bibliographical note

Funding Information:
This research was supported by a grant (07Sea-HeroA01-01) from the Plant Technology Advancement Program funded by the Ministry of Land, Transport and Maritime Affairs, Korea, and also supported by the Brain Korea 21 program of the Ministry of Education.

All Science Journal Classification (ASJC) codes

Water Science and Technology
Ocean Engineering
Pollution

Access to Document

10.5004/dwt.2010.1780

Cite this

@article{29a9689ae16f482c856519c2e22165c8,

title = "Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate",

abstract = "This study evaluated the possibility of an electrochemical process as a pre-treatment of a seawater reverse osmosis (SWRO) desalination plant. Initially, during electrolysis of seawater the formation trend of free chlorine was observed and then inactivation rate of Bacillus sp. isolate obtained from natural seawater was measured to evaluate the potential for reducing biofouling of SWRO membrane. As a result, the Bacillus sp. spores present in seawater were completely inactivated at approx. 210 s of electrolysis time, showing 2.4-time higher inactivation rate compared to chlorination alone. This study also investigated the formation trend of perchlorate (ClO−4) during electrolysis of seawater and its rejection by microfi ltration and the SWRO membrane. After 5 min of electrolysis, 27 μg/L of ClO−4 was produced. It was also found that 20% and 98% rejection efficiencies of ClO−4 were observed through microfi ltration and SWRO filtration. The optimum condition of the electrochemical process as a pre-treatment in the seawater desalination plant was determined to be ~4 min of electrolysis time and 110 mA/cm2 of current density under the tested natural seawater condition.",

author = "Oh, {Byung Soo} and Oh, {Sang Geun} and Jung, {Yeon Jung} and Hwang, {Yun Young} and Kang, {Joon Wun} and Kim, {In S.}",

note = "Funding Information: This research was supported by a grant (07Sea-HeroA01-01) from the Plant Technology Advancement Program funded by the Ministry of Land, Transport and Maritime Affairs, Korea, and also supported by the Brain Korea 21 program of the Ministry of Education.",

year = "2010",

month = jun,

doi = "10.5004/dwt.2010.1780",

language = "English",

volume = "18",

pages = "245--250",

journal = "Desalination and Water Treatment",

issn = "1944-3994",

publisher = "Taylor and Francis Ltd.",

number = "1-3",

}

TY - JOUR

T1 - Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate

AU - Oh, Byung Soo

AU - Oh, Sang Geun

AU - Jung, Yeon Jung

AU - Hwang, Yun Young

AU - Kang, Joon Wun

AU - Kim, In S.

N1 - Funding Information: This research was supported by a grant (07Sea-HeroA01-01) from the Plant Technology Advancement Program funded by the Ministry of Land, Transport and Maritime Affairs, Korea, and also supported by the Brain Korea 21 program of the Ministry of Education.

PY - 2010/6

Y1 - 2010/6

N2 - This study evaluated the possibility of an electrochemical process as a pre-treatment of a seawater reverse osmosis (SWRO) desalination plant. Initially, during electrolysis of seawater the formation trend of free chlorine was observed and then inactivation rate of Bacillus sp. isolate obtained from natural seawater was measured to evaluate the potential for reducing biofouling of SWRO membrane. As a result, the Bacillus sp. spores present in seawater were completely inactivated at approx. 210 s of electrolysis time, showing 2.4-time higher inactivation rate compared to chlorination alone. This study also investigated the formation trend of perchlorate (ClO−4) during electrolysis of seawater and its rejection by microfi ltration and the SWRO membrane. After 5 min of electrolysis, 27 μg/L of ClO−4 was produced. It was also found that 20% and 98% rejection efficiencies of ClO−4 were observed through microfi ltration and SWRO filtration. The optimum condition of the electrochemical process as a pre-treatment in the seawater desalination plant was determined to be ~4 min of electrolysis time and 110 mA/cm2 of current density under the tested natural seawater condition.

AB - This study evaluated the possibility of an electrochemical process as a pre-treatment of a seawater reverse osmosis (SWRO) desalination plant. Initially, during electrolysis of seawater the formation trend of free chlorine was observed and then inactivation rate of Bacillus sp. isolate obtained from natural seawater was measured to evaluate the potential for reducing biofouling of SWRO membrane. As a result, the Bacillus sp. spores present in seawater were completely inactivated at approx. 210 s of electrolysis time, showing 2.4-time higher inactivation rate compared to chlorination alone. This study also investigated the formation trend of perchlorate (ClO−4) during electrolysis of seawater and its rejection by microfi ltration and the SWRO membrane. After 5 min of electrolysis, 27 μg/L of ClO−4 was produced. It was also found that 20% and 98% rejection efficiencies of ClO−4 were observed through microfi ltration and SWRO filtration. The optimum condition of the electrochemical process as a pre-treatment in the seawater desalination plant was determined to be ~4 min of electrolysis time and 110 mA/cm2 of current density under the tested natural seawater condition.

UR - http://www.scopus.com/inward/record.url?scp=78649473375&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649473375&partnerID=8YFLogxK

U2 - 10.5004/dwt.2010.1780

DO - 10.5004/dwt.2010.1780

M3 - Article

AN - SCOPUS:78649473375

SN - 1944-3994

VL - 18

SP - 245

EP - 250

JO - Desalination and Water Treatment

JF - Desalination and Water Treatment

IS - 1-3

ER -

Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this