Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process

The energy-efficient reverse osmosis (EERO) desalination process was recently developed for cost-effective high total water recovery. It feeds the retentate from one or more single-stage reverse osmosis (SSRO) stages in series to a countercurrent membrane cascade with recycle (CMCR) consisting of a...

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Main Authors: Chong, Tzyy Haur, Krantz, William B.
其他作者: School of Civil and Environmental Engineering
格式: Article
語言:English
出版: 2020
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在線閱讀:https://hdl.handle.net/10356/141980
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機構: Nanyang Technological University
語言: English
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spelling sg-ntu-dr.10356-1419802020-06-12T09:23:49Z Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process Chong, Tzyy Haur Krantz, William B. School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Civil engineering Desalination Energy-efficient Reverse Osmosis The energy-efficient reverse osmosis (EERO) desalination process was recently developed for cost-effective high total water recovery. It feeds the retentate from one or more single-stage reverse osmosis (SSRO) stages in series to a countercurrent membrane cascade with recycle (CMCR) consisting of a terminal reverse osmosis (RO) stage and one or more low salt-rejection stages. The CMCR permits retentate refluxing in the low salt-rejection stages and multi-pass processing of permeate. The novel 2-2 EERO process is advanced that involves two SSRO stages in series with a 2-stage CMCR. To address problems encountered in a pilot-scale test of the EERO process, it develops an operating strategy involving boosting the pressure to the low salt-rejection stage of the CMCR to compensate for using membranes with a higher salt rejection than required. A process embodiment for mitigating concentration polarization is also advanced. The first estimate of the total cost of water production for three EERO process configurations is made. The EERO process can reduce the osmotic pressure differential by 50% relative to conventional SSRO for the same total water recovery and can achieve 75% total water recovery at a lower total cost of water production than conventional SSRO operated at just 50% water recovery. NRF (Natl Research Foundation, S’pore) EDB (Economic Devt. Board, S’pore) 2020-06-12T09:23:49Z 2020-06-12T09:23:49Z 2018 Journal Article Chong, T. H., & Krantz, W. B. (2018). Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process. Desalination, 443, 70-84. doi:10.1016/j.desal.2018.05.007 0011-9164 https://hdl.handle.net/10356/141980 10.1016/j.desal.2018.05.007 2-s2.0-85047823530 443 70 84 en Desalination © 2018 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Civil engineering
Desalination
Energy-efficient Reverse Osmosis
spellingShingle Engineering::Civil engineering
Desalination
Energy-efficient Reverse Osmosis
Chong, Tzyy Haur
Krantz, William B.
Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process
description The energy-efficient reverse osmosis (EERO) desalination process was recently developed for cost-effective high total water recovery. It feeds the retentate from one or more single-stage reverse osmosis (SSRO) stages in series to a countercurrent membrane cascade with recycle (CMCR) consisting of a terminal reverse osmosis (RO) stage and one or more low salt-rejection stages. The CMCR permits retentate refluxing in the low salt-rejection stages and multi-pass processing of permeate. The novel 2-2 EERO process is advanced that involves two SSRO stages in series with a 2-stage CMCR. To address problems encountered in a pilot-scale test of the EERO process, it develops an operating strategy involving boosting the pressure to the low salt-rejection stage of the CMCR to compensate for using membranes with a higher salt rejection than required. A process embodiment for mitigating concentration polarization is also advanced. The first estimate of the total cost of water production for three EERO process configurations is made. The EERO process can reduce the osmotic pressure differential by 50% relative to conventional SSRO for the same total water recovery and can achieve 75% total water recovery at a lower total cost of water production than conventional SSRO operated at just 50% water recovery.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Chong, Tzyy Haur
Krantz, William B.
format Article
author Chong, Tzyy Haur
Krantz, William B.
author_sort Chong, Tzyy Haur
title Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process
title_short Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process
title_full Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process
title_fullStr Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process
title_full_unstemmed Process economics and operating strategy for the energy-efficient reverse osmosis (EERO) process
title_sort process economics and operating strategy for the energy-efficient reverse osmosis (eero) process
publishDate 2020
url https://hdl.handle.net/10356/141980
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