A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment
In this study, permeate quality, membrane performance, and microbial community in a gravity-driven microfiltration (GDM) reactor and a biofiltration (BF) + GDM reactor for seawater reverse osmosis (RO) desalination pretreatment were compared at both lab-scale and pilot-scale. The presence of BF colu...
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sg-ntu-dr.10356-1441732021-02-15T05:29:17Z A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment Lee, Seonki Suwarno, Stanislaus Raditya Quek, Bryan Wei Hong Kim, Lanhee Wu, Bing Chong, Tzyy Haur School of Civil and Environmental Engineering King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Division of Biological and Environmental Science and Engineering (BESE), Saudi Arabia Faculty of Civil and Environmental Engineering, University of Iceland, Iceland Nanyang Environment and Water Research Institute Engineering::Environmental engineering::Water treatment Biofiltration Energy Consumption In this study, permeate quality, membrane performance, and microbial community in a gravity-driven microfiltration (GDM) reactor and a biofiltration (BF) + GDM reactor for seawater reverse osmosis (RO) desalination pretreatment were compared at both lab-scale and pilot-scale. The presence of BF column was more efficient in removing soluble organic substances by biosorption/biodegradation, leading to superior permeate quality from BF + GDM and subsequently lower RO fouling than GDM. Compared to the biofilm-saturated anthracite media, the granular activated carbon media in BF improved the assimilable organic substances removal in BF + GDM. Although less organic substances and microbial cells were accumulated on the membrane in BF + GDM, its permeate flux was 10–20% lower than GDM. Furthermore, BF lowered the amounts and diversity of prokaryotes (due to less organic substances) and eukaryotes (due to BF media rejection and lacking of prokaryotic preys) in the membrane biofilm of BF + GDM, but did not cause significant shifts of predominant species. Thus, the lower flux in BF + GDM was attributed to the limited predation and movement of eukaryotes in membrane biofilm, which may result in the formation of less porous and compact biofilm layer. The cost analysis indicated that BF + GDM-RO requires 5.2% less operating cost and 1.5% less water production cost than GDM-RO. Economic Development Board (EDB) Public Utilities Board (PUB) Accepted version This study is under the Singapore Membrane Technology Centre Seawater Facility project (TBD-WTTM-1504-0002), which is supported by the PUB, Singapore's National Water Agency. The Economic Development Board (EDB) of Singapore is acknowledged for funding the Singapore Membrane Technology Centre (SMTC), Nanyang Technological University. 2020-10-19T08:00:24Z 2020-10-19T08:00:24Z 2019 Journal Article Lee, S., Suwarno, S. R., Quek, B. W. H., Kim, L., Wu, B., & Chong, T. H. (2019). A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment. Water Research, 154, 72-83. doi:10.1016/j.watres.2019.01.044 0043-1354 https://hdl.handle.net/10356/144173 10.1016/j.watres.2019.01.044 154 72 83 en Water Reserach © 2019 Elsevier Ltd. All rights reserved. This paper was published in Water Research and is made available with permission of Elsevier Ltd. application/pdf |
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Engineering::Environmental engineering::Water treatment Biofiltration Energy Consumption Lee, Seonki Suwarno, Stanislaus Raditya Quek, Bryan Wei Hong Kim, Lanhee Wu, Bing Chong, Tzyy Haur A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment |
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In this study, permeate quality, membrane performance, and microbial community in a gravity-driven microfiltration (GDM) reactor and a biofiltration (BF) + GDM reactor for seawater reverse osmosis (RO) desalination pretreatment were compared at both lab-scale and pilot-scale. The presence of BF column was more efficient in removing soluble organic substances by biosorption/biodegradation, leading to superior permeate quality from BF + GDM and subsequently lower RO fouling than GDM. Compared to the biofilm-saturated anthracite media, the granular activated carbon media in BF improved the assimilable organic substances removal in BF + GDM. Although less organic substances and microbial cells were accumulated on the membrane in BF + GDM, its permeate flux was 10–20% lower than GDM. Furthermore, BF lowered the amounts and diversity of prokaryotes (due to less organic substances) and eukaryotes (due to BF media rejection and lacking of prokaryotic preys) in the membrane biofilm of BF + GDM, but did not cause significant shifts of predominant species. Thus, the lower flux in BF + GDM was attributed to the limited predation and movement of eukaryotes in membrane biofilm, which may result in the formation of less porous and compact biofilm layer. The cost analysis indicated that BF + GDM-RO requires 5.2% less operating cost and 1.5% less water production cost than GDM-RO. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Lee, Seonki Suwarno, Stanislaus Raditya Quek, Bryan Wei Hong Kim, Lanhee Wu, Bing Chong, Tzyy Haur |
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Article |
author |
Lee, Seonki Suwarno, Stanislaus Raditya Quek, Bryan Wei Hong Kim, Lanhee Wu, Bing Chong, Tzyy Haur |
author_sort |
Lee, Seonki |
title |
A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment |
title_short |
A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment |
title_full |
A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment |
title_fullStr |
A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment |
title_full_unstemmed |
A comparison of gravity-driven membrane (GDM) reactor and biofiltration + GDM reactor for seawater reverse osmosis desalination pretreatment |
title_sort |
comparison of gravity-driven membrane (gdm) reactor and biofiltration + gdm reactor for seawater reverse osmosis desalination pretreatment |
publishDate |
2020 |
url |
https://hdl.handle.net/10356/144173 |
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1696984377023528960 |