A case study of fouling development and flux reversibility of treating actual lake water by forward osmosis process

Youngpil Chun; Francois Zaviska; Emile Cornelissen; Linda Zou

doi:10.1016/j.desal.2014.11.009

A case study of fouling development and flux reversibility of treating actual lake water by forward osmosis process

Youngpil Chun
, Francois Zaviska
, Emile Cornelissen
, Linda Zou

Civil & Environmental Engineering

University of South Australia
KWR Watercycle Research Institute

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

39 Scopus citations

Abstract

Non-chlorinated actual brackish lake water was used as feed to examine the fouling behaviour, includes biofouling and cleaning effects of forward osmosis (FO). Fouling experiments were conducted at different filtration time durations on thin film composite (TFC) membrane in FO mode (active layer facing the feed). Fouling was formed on membrane surface and followed an exponential trend during the experimental period. Microbiological assays and fluorescence excitation-emission spectrophotometer were used to examine the details of the foulants and provide information on the physiological state of the membrane foulants in the FO system. The results indicated that the fouling observed was the combination of bacterial biomass (biofouling) and protein-like organic constituents derived from microbial activity (organic fouling). At the end of the 24. h fouling experiments, the water flux declined by approximately 65% of the initial value. However, the flux was completely recovered to its initial level following hydraulic cleaning by deionized (DI) water; the fouling on the FO membrane is found to be reversible.

Original language	British English
Pages (from-to)	55-64
Number of pages	10
Journal	Desalination
Volume	357
DOIs	https://doi.org/10.1016/j.desal.2014.11.009
State	Published - 2 Feb 2015

Keywords

Forward osmosis
Membrane fouling
Membrane hydraulic cleaning
Non-chlorinated actual brackish surface water

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title = "A case study of fouling development and flux reversibility of treating actual lake water by forward osmosis process",

abstract = "Non-chlorinated actual brackish lake water was used as feed to examine the fouling behaviour, includes biofouling and cleaning effects of forward osmosis (FO). Fouling experiments were conducted at different filtration time durations on thin film composite (TFC) membrane in FO mode (active layer facing the feed). Fouling was formed on membrane surface and followed an exponential trend during the experimental period. Microbiological assays and fluorescence excitation-emission spectrophotometer were used to examine the details of the foulants and provide information on the physiological state of the membrane foulants in the FO system. The results indicated that the fouling observed was the combination of bacterial biomass (biofouling) and protein-like organic constituents derived from microbial activity (organic fouling). At the end of the 24. h fouling experiments, the water flux declined by approximately 65\% of the initial value. However, the flux was completely recovered to its initial level following hydraulic cleaning by deionized (DI) water; the fouling on the FO membrane is found to be reversible.",

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author = "Youngpil Chun and Francois Zaviska and Emile Cornelissen and Linda Zou",

note = "Funding Information: The authors would like to acknowledge the financial support of the National Centre of Excellence in Desalination Australia (Funding Round 4) , which is funded by the Australian Government through the {\textquoteleft}Water for the Future{\textquoteright} initiative. The authors are also grateful to technical advisories and comments received from Dr Con Pelekani at SA Water and Mr Peter Nicoll at Modern Water, UK. Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

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AU - Chun, Youngpil

AU - Zaviska, Francois

AU - Cornelissen, Emile

AU - Zou, Linda

N1 - Funding Information: The authors would like to acknowledge the financial support of the National Centre of Excellence in Desalination Australia (Funding Round 4) , which is funded by the Australian Government through the ‘Water for the Future’ initiative. The authors are also grateful to technical advisories and comments received from Dr Con Pelekani at SA Water and Mr Peter Nicoll at Modern Water, UK. Publisher Copyright: © 2014 Elsevier B.V.

PY - 2015/2/2

Y1 - 2015/2/2

N2 - Non-chlorinated actual brackish lake water was used as feed to examine the fouling behaviour, includes biofouling and cleaning effects of forward osmosis (FO). Fouling experiments were conducted at different filtration time durations on thin film composite (TFC) membrane in FO mode (active layer facing the feed). Fouling was formed on membrane surface and followed an exponential trend during the experimental period. Microbiological assays and fluorescence excitation-emission spectrophotometer were used to examine the details of the foulants and provide information on the physiological state of the membrane foulants in the FO system. The results indicated that the fouling observed was the combination of bacterial biomass (biofouling) and protein-like organic constituents derived from microbial activity (organic fouling). At the end of the 24. h fouling experiments, the water flux declined by approximately 65% of the initial value. However, the flux was completely recovered to its initial level following hydraulic cleaning by deionized (DI) water; the fouling on the FO membrane is found to be reversible.

AB - Non-chlorinated actual brackish lake water was used as feed to examine the fouling behaviour, includes biofouling and cleaning effects of forward osmosis (FO). Fouling experiments were conducted at different filtration time durations on thin film composite (TFC) membrane in FO mode (active layer facing the feed). Fouling was formed on membrane surface and followed an exponential trend during the experimental period. Microbiological assays and fluorescence excitation-emission spectrophotometer were used to examine the details of the foulants and provide information on the physiological state of the membrane foulants in the FO system. The results indicated that the fouling observed was the combination of bacterial biomass (biofouling) and protein-like organic constituents derived from microbial activity (organic fouling). At the end of the 24. h fouling experiments, the water flux declined by approximately 65% of the initial value. However, the flux was completely recovered to its initial level following hydraulic cleaning by deionized (DI) water; the fouling on the FO membrane is found to be reversible.

KW - Forward osmosis

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KW - Membrane hydraulic cleaning

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A case study of fouling development and flux reversibility of treating actual lake water by forward osmosis process

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