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

Research output: Contribution to journalArticle

17 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/cm 2 of current density under the tested natural seawater condition.

Original languageEnglish
Pages (from-to)245-250
Number of pages6
JournalDesalination and Water Treatment
Volume18
Issue number1-3
DOIs
Publication statusPublished - 2010 Jun

Fingerprint

perchlorate
Seawater
Electrolysis
Chlorine
chlorine
electrokinesis
seawater
Reverse osmosis
Osmosis membranes
Bacilli
Desalination
evaluation
membrane
Biofouling
biofouling
Chlorination
chlorination
spore
Current density

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cite this

Oh, Byung Soo ; Oh, Sang Geun ; Jung, Yeon Jung ; Hwang, Yun Young ; Kang, Joon Wun ; Kim, In S. / Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate. In: Desalination and Water Treatment. 2010 ; Vol. 18, No. 1-3. pp. 245-250.
@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/cm 2 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.}",
year = "2010",
month = "6",
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",

}

Evaluation of a seawater electrolysis process considering formation of free chlorine and perchlorate. / Oh, Byung Soo; Oh, Sang Geun; Jung, Yeon Jung; Hwang, Yun Young; Kang, Joon Wun; Kim, In S.

In: Desalination and Water Treatment, Vol. 18, No. 1-3, 06.2010, p. 245-250.

Research output: Contribution to journalArticle

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.

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/cm 2 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/cm 2 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

VL - 18

SP - 245

EP - 250

JO - Desalination and Water Treatment

JF - Desalination and Water Treatment

SN - 1944-3994

IS - 1-3

ER -