Evaluation of potential particulate/colloidal TEP foulants on a pilot scale SWRO desalination study

Sheng Li; Shahnawaz Sinha; TorOve Leiknes; Gary L. Amy; NorEddine Ghaffour

doi:10.1016/j.desal.2016.01.017

Evaluation of potential particulate/colloidal TEP foulants on a pilot scale SWRO desalination study

Sheng Li, Shahnawaz Sinha, TorOve Leiknes, Gary L. Amy, NorEddine Ghaffour

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

27 Scopus citations

Abstract

This pilot study investigated the variation of potential foulants and different fractions of transparent exopolymer particles (TEP), along the treatment scheme under different conditions. The objectives are to provide a comprehensive understanding on which fraction of TEP is more problematic in seawater reverse osmosis (SWRO) fouling, and which pretreatment can better reduce the concentration of TEP. Results showed that TEP deposited on the RO membranes, and the extent of RO fouling increased with the increase of TEP concentration in RO feed water. More TEP was produced in water after chlorination, probably because of the breakdown of bacterial cells and thus the release of internal exopolymers. Moreover, the cartridge filters could behave as an incubator for the regrowth of bacteria deactivated by chlorination and a spot for potential foulant (bacterial TEP) production, and thus enhance the RO membranes fouling. The presence of residual iron and addition of phosphate based antiscalant may also contribute to the higher biofouling of RO membranes. This pilot study provided an opportunity to identify the TEP related issues under different operational conditions in RO desalination of Red Sea water.

Original language	English (US)
Pages (from-to)	127-134
Number of pages	8
Journal	Desalination
Volume	393
DOIs	https://doi.org/10.1016/j.desal.2016.01.017
State	Published - Jan 21 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01

ASJC Scopus subject areas

Water Science and Technology
General Materials Science
General Chemical Engineering
General Chemistry
Mechanical Engineering

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10.1016/j.desal.2016.01.017

https://repository.kaust.edu.sa/bitstream/10754/596504/1/Evaluation%20of%20potential%20particulatecolloidal%20TEP%20foulants%20on%20a%20.pdf

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title = "Evaluation of potential particulate/colloidal TEP foulants on a pilot scale SWRO desalination study",

abstract = "This pilot study investigated the variation of potential foulants and different fractions of transparent exopolymer particles (TEP), along the treatment scheme under different conditions. The objectives are to provide a comprehensive understanding on which fraction of TEP is more problematic in seawater reverse osmosis (SWRO) fouling, and which pretreatment can better reduce the concentration of TEP. Results showed that TEP deposited on the RO membranes, and the extent of RO fouling increased with the increase of TEP concentration in RO feed water. More TEP was produced in water after chlorination, probably because of the breakdown of bacterial cells and thus the release of internal exopolymers. Moreover, the cartridge filters could behave as an incubator for the regrowth of bacteria deactivated by chlorination and a spot for potential foulant (bacterial TEP) production, and thus enhance the RO membranes fouling. The presence of residual iron and addition of phosphate based antiscalant may also contribute to the higher biofouling of RO membranes. This pilot study provided an opportunity to identify the TEP related issues under different operational conditions in RO desalination of Red Sea water.",

author = "Sheng Li and Shahnawaz Sinha and TorOve Leiknes and Amy, {Gary L.} and NorEddine Ghaffour",

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doi = "10.1016/j.desal.2016.01.017",

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AU - Li, Sheng

AU - Sinha, Shahnawaz

AU - Leiknes, TorOve

AU - Amy, Gary L.

AU - Ghaffour, NorEddine

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2016/1/21

Y1 - 2016/1/21

N2 - This pilot study investigated the variation of potential foulants and different fractions of transparent exopolymer particles (TEP), along the treatment scheme under different conditions. The objectives are to provide a comprehensive understanding on which fraction of TEP is more problematic in seawater reverse osmosis (SWRO) fouling, and which pretreatment can better reduce the concentration of TEP. Results showed that TEP deposited on the RO membranes, and the extent of RO fouling increased with the increase of TEP concentration in RO feed water. More TEP was produced in water after chlorination, probably because of the breakdown of bacterial cells and thus the release of internal exopolymers. Moreover, the cartridge filters could behave as an incubator for the regrowth of bacteria deactivated by chlorination and a spot for potential foulant (bacterial TEP) production, and thus enhance the RO membranes fouling. The presence of residual iron and addition of phosphate based antiscalant may also contribute to the higher biofouling of RO membranes. This pilot study provided an opportunity to identify the TEP related issues under different operational conditions in RO desalination of Red Sea water.

AB - This pilot study investigated the variation of potential foulants and different fractions of transparent exopolymer particles (TEP), along the treatment scheme under different conditions. The objectives are to provide a comprehensive understanding on which fraction of TEP is more problematic in seawater reverse osmosis (SWRO) fouling, and which pretreatment can better reduce the concentration of TEP. Results showed that TEP deposited on the RO membranes, and the extent of RO fouling increased with the increase of TEP concentration in RO feed water. More TEP was produced in water after chlorination, probably because of the breakdown of bacterial cells and thus the release of internal exopolymers. Moreover, the cartridge filters could behave as an incubator for the regrowth of bacteria deactivated by chlorination and a spot for potential foulant (bacterial TEP) production, and thus enhance the RO membranes fouling. The presence of residual iron and addition of phosphate based antiscalant may also contribute to the higher biofouling of RO membranes. This pilot study provided an opportunity to identify the TEP related issues under different operational conditions in RO desalination of Red Sea water.

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DO - 10.1016/j.desal.2016.01.017

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JO - Desalination

JF - Desalination

ER -

Evaluation of potential particulate/colloidal TEP foulants on a pilot scale SWRO desalination study

Abstract

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ASJC Scopus subject areas

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