How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs
Improving the recovery of desalination processes can have economic benefits, as feed and brine volumes are minimised. Furthermore, brine volume minimisation (BVM) simplifies brine treatment prior to disposal and hence, alleviates potential environmental concerns. However, BVM is not widely applied,...
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sg-ntu-dr.10356-1617582022-09-19T05:39:32Z How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs Mo, Zijing Peters, Christian D. Long, Cheng Hankins, Nicholas P. She, Qianhong School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) School of Computer Science and Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Environmental engineering Osmotically Assisted Reverse Osmosis Split-Feed Counterflow Reverse Osmosis Improving the recovery of desalination processes can have economic benefits, as feed and brine volumes are minimised. Furthermore, brine volume minimisation (BVM) simplifies brine treatment prior to disposal and hence, alleviates potential environmental concerns. However, BVM is not widely applied, as it is generally more energy intensive and costly. This may change in the future, as new high-recovery membrane processes, such as split-feed osmotically assisted reverse osmosis (SF-OARO), can potentially lower the required operating pressure and the energy consumption associated with brine dewatering via osmotic counterbalance. In addition, the added flexibility of OARO integrated systems may further reduce the unit water cost (UWC) in regions with varying-electricity tariffs. To verify these hypothesised advantages of OARO, this study explores the economic and technical viability of SF-OARO. Under constant electricity tariffs, the results indicate that the optimized SF-OARO process can achieve a higher process recovery (65% versus 50%) while operating at a 4.1% lower UWC than conventional RO (CRO), when assuming an intermediate brine disposal cost of 0.3 $/m3. This cost advantage of SF-OARO further expands under operation with varying-electricity tariffs. In summary, the presented results indicate that the SF-OARO process is the preferred and cheaper choice once the brine disposal cost exceeds 0.21 $/m3 of brine. Ministry of Education (MOE) This research was supported by the Ministry of Education, Singapore, under the Academic Research Fund Tier 1 (RG84/19). 2022-09-19T05:39:32Z 2022-09-19T05:39:32Z 2022 Journal Article Mo, Z., Peters, C. D., Long, C., Hankins, N. P. & She, Q. (2022). How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs. Desalination, 530, 115670-. https://dx.doi.org/10.1016/j.desal.2022.115670 0011-9164 https://hdl.handle.net/10356/161758 10.1016/j.desal.2022.115670 2-s2.0-85125587098 530 115670 en RG84/19 Desalination © 2022 Elsevier B.V. All rights reserved. |
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Engineering::Environmental engineering Osmotically Assisted Reverse Osmosis Split-Feed Counterflow Reverse Osmosis Mo, Zijing Peters, Christian D. Long, Cheng Hankins, Nicholas P. She, Qianhong How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs |
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Improving the recovery of desalination processes can have economic benefits, as feed and brine volumes are minimised. Furthermore, brine volume minimisation (BVM) simplifies brine treatment prior to disposal and hence, alleviates potential environmental concerns. However, BVM is not widely applied, as it is generally more energy intensive and costly. This may change in the future, as new high-recovery membrane processes, such as split-feed osmotically assisted reverse osmosis (SF-OARO), can potentially lower the required operating pressure and the energy consumption associated with brine dewatering via osmotic counterbalance. In addition, the added flexibility of OARO integrated systems may further reduce the unit water cost (UWC) in regions with varying-electricity tariffs. To verify these hypothesised advantages of OARO, this study explores the economic and technical viability of SF-OARO. Under constant electricity tariffs, the results indicate that the optimized SF-OARO process can achieve a higher process recovery (65% versus 50%) while operating at a 4.1% lower UWC than conventional RO (CRO), when assuming an intermediate brine disposal cost of 0.3 $/m3. This cost advantage of SF-OARO further expands under operation with varying-electricity tariffs. In summary, the presented results indicate that the SF-OARO process is the preferred and cheaper choice once the brine disposal cost exceeds 0.21 $/m3 of brine. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Mo, Zijing Peters, Christian D. Long, Cheng Hankins, Nicholas P. She, Qianhong |
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Article |
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Mo, Zijing Peters, Christian D. Long, Cheng Hankins, Nicholas P. She, Qianhong |
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Mo, Zijing |
title |
How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs |
title_short |
How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs |
title_full |
How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs |
title_fullStr |
How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs |
title_full_unstemmed |
How split-feed osmotically assisted reverse osmosis (SF-OARO) can outperform conventional reverse osmosis (CRO) processes under constant and varying electricity tariffs |
title_sort |
how split-feed osmotically assisted reverse osmosis (sf-oaro) can outperform conventional reverse osmosis (cro) processes under constant and varying electricity tariffs |
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2022 |
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https://hdl.handle.net/10356/161758 |
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1745574613669117952 |