Fouling evaluation and mechanisms in a FO-RO hybrid process for direct potable reuse

Byeong Gyu Choi; David Inhyuk Kim; Seungkwan Hong

doi:10.1016/j.memsci.2016.07.035

Fouling evaluation and mechanisms in a FO-RO hybrid process for direct potable reuse

Byeong Gyu Choi
, David Inhyuk Kim
, Seungkwan Hong^*

^*Corresponding author for this work

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

63 Citations (Scopus)

Abstract

A forward osmosis (FO) and reverse osmosis (RO) hybrid process was examined for sustainable direct potable reuse (DPR) of wastewater through integration with seawater desalination. Using real wastewater secondary effluent, feasibility of the FO-RO system for DPR was systematically assessed by investigating fouling behavior and its reversibility and evaluating the quality of produced water. Its technical advantages were further verified by the ease of fouling control. The results for the silt density index (SDI) and the modified fouling index (MFI) clearly demonstrated that FO significantly alleviated the potential of subsequent RO membrane fouling, leading to sustainable RO operation for wastewater reuse. Permeate water flux in FO was significantly recovered by physical cleaning. However, biopolymer-like substances was persistently accumulated on the FO membrane surface even after repeated cleaning, suggesting that pretreatment for removal of such substances causing irreversible fouling are required for long-term operation of the FO-RO process. Lastly, the final product water satisfied all 58 components of the quality standards for drinking water in Korea, confirming that the double barrier provided by the FO and RO membranes was adequate for DPR.

Original language	English
Pages (from-to)	89-98
Number of pages	10
Journal	Journal of Membrane Science
Volume	520
DOIs	https://doi.org/10.1016/j.memsci.2016.07.035
Publication status	Published - 2016 Dec 15

Bibliographical note

Funding Information:
This research was supported by a grant (code 16IFIP-B088091-03 ) from Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

Direct potable reuse (DPR)
FO-RO hybrid process
Fouling potential
Silt density index (SDI)
Wastewater reuse

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2016.07.035

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title = "Fouling evaluation and mechanisms in a FO-RO hybrid process for direct potable reuse",

abstract = "A forward osmosis (FO) and reverse osmosis (RO) hybrid process was examined for sustainable direct potable reuse (DPR) of wastewater through integration with seawater desalination. Using real wastewater secondary effluent, feasibility of the FO-RO system for DPR was systematically assessed by investigating fouling behavior and its reversibility and evaluating the quality of produced water. Its technical advantages were further verified by the ease of fouling control. The results for the silt density index (SDI) and the modified fouling index (MFI) clearly demonstrated that FO significantly alleviated the potential of subsequent RO membrane fouling, leading to sustainable RO operation for wastewater reuse. Permeate water flux in FO was significantly recovered by physical cleaning. However, biopolymer-like substances was persistently accumulated on the FO membrane surface even after repeated cleaning, suggesting that pretreatment for removal of such substances causing irreversible fouling are required for long-term operation of the FO-RO process. Lastly, the final product water satisfied all 58 components of the quality standards for drinking water in Korea, confirming that the double barrier provided by the FO and RO membranes was adequate for DPR.",

keywords = "Direct potable reuse (DPR), FO-RO hybrid process, Fouling potential, Silt density index (SDI), Wastewater reuse",

author = "Choi, \{Byeong Gyu\} and Kim, \{David Inhyuk\} and Seungkwan Hong",

note = "Funding Information: This research was supported by a grant (code 16IFIP-B088091-03 ) from Industrial Facilities \& Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government. Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

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doi = "10.1016/j.memsci.2016.07.035",

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AU - Choi, Byeong Gyu

AU - Kim, David Inhyuk

AU - Hong, Seungkwan

N1 - Funding Information: This research was supported by a grant (code 16IFIP-B088091-03 ) from Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government. Publisher Copyright: © 2016 Elsevier B.V.

PY - 2016/12/15

Y1 - 2016/12/15

N2 - A forward osmosis (FO) and reverse osmosis (RO) hybrid process was examined for sustainable direct potable reuse (DPR) of wastewater through integration with seawater desalination. Using real wastewater secondary effluent, feasibility of the FO-RO system for DPR was systematically assessed by investigating fouling behavior and its reversibility and evaluating the quality of produced water. Its technical advantages were further verified by the ease of fouling control. The results for the silt density index (SDI) and the modified fouling index (MFI) clearly demonstrated that FO significantly alleviated the potential of subsequent RO membrane fouling, leading to sustainable RO operation for wastewater reuse. Permeate water flux in FO was significantly recovered by physical cleaning. However, biopolymer-like substances was persistently accumulated on the FO membrane surface even after repeated cleaning, suggesting that pretreatment for removal of such substances causing irreversible fouling are required for long-term operation of the FO-RO process. Lastly, the final product water satisfied all 58 components of the quality standards for drinking water in Korea, confirming that the double barrier provided by the FO and RO membranes was adequate for DPR.

AB - A forward osmosis (FO) and reverse osmosis (RO) hybrid process was examined for sustainable direct potable reuse (DPR) of wastewater through integration with seawater desalination. Using real wastewater secondary effluent, feasibility of the FO-RO system for DPR was systematically assessed by investigating fouling behavior and its reversibility and evaluating the quality of produced water. Its technical advantages were further verified by the ease of fouling control. The results for the silt density index (SDI) and the modified fouling index (MFI) clearly demonstrated that FO significantly alleviated the potential of subsequent RO membrane fouling, leading to sustainable RO operation for wastewater reuse. Permeate water flux in FO was significantly recovered by physical cleaning. However, biopolymer-like substances was persistently accumulated on the FO membrane surface even after repeated cleaning, suggesting that pretreatment for removal of such substances causing irreversible fouling are required for long-term operation of the FO-RO process. Lastly, the final product water satisfied all 58 components of the quality standards for drinking water in Korea, confirming that the double barrier provided by the FO and RO membranes was adequate for DPR.

KW - Direct potable reuse (DPR)

KW - FO-RO hybrid process

KW - Fouling potential

KW - Silt density index (SDI)

KW - Wastewater reuse

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U2 - 10.1016/j.memsci.2016.07.035

DO - 10.1016/j.memsci.2016.07.035

M3 - Article

AN - SCOPUS:84982683745

SN - 0376-7388

VL - 520

SP - 89

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JO - Journal of Membrane Science

JF - Journal of Membrane Science

ER -

Fouling evaluation and mechanisms in a FO-RO hybrid process for direct potable reuse

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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