The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment
Standalone membrane distillation (MD) and forward osmosis (FO) have been considered as promising technologies for produced water treatment. However, standalone MD is still vulnerable to membrane-wetting and scaling problems, while the standalone FO is energy-intensive, since it requires the recovery...
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2020
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my.utp.eprints.300242022-03-25T03:18:05Z The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment Nawi, N.I.M. Bilad, M.R. Anath, G. Nordin, N.A.H. Kurnia, J.C. Wibisono, Y. Arahman, N. Standalone membrane distillation (MD) and forward osmosis (FO) have been considered as promising technologies for produced water treatment. However, standalone MD is still vulnerable to membrane-wetting and scaling problems, while the standalone FO is energy-intensive, since it requires the recovery of the draw solution (DS). Thus, the idea of coupling FO and MD is proposed as a promising combination in which the MD facilitate DS recovery for FO�and FO acts as pretreatment to enhance fouling and wetting-resistance of the MD. This study was therefore conducted to investigate the effect of DS temperature on the dynamic of water flux of a hybrid FO�MD. First, the effect of the DS temperature on the standalone FO and MD was evaluated. Later, the flux dynamics of both units were evaluated when the FO and DS recovery (via MD) was run simultaneously. Results show that an increase in the temperature difference (from 20 to 60� C) resulted in an increase of the FO and MD fluxes from 11.17 ± 3.85 to 30.17 ± 5.51 L m�2 h�1, and from 0.5 ± 0.75 to 16.08 L m�2 h�1, respectively. For the hybrid FO�MD, either MD or FO could act as the limiting process that dictates the equilibrium flux. Both the concentration and the temperature of DS affected the flux dynamic. When the FO flux was higher than MD flux, DS was diluted, and its temperature decreased; both then lowered the FO flux until reaching an equilibrium (equal FO and MD flux). When FO flux was lower than MD flux, the DS was concentrated which increased the FO flux until reaching the equilibrium. The overall results suggest the importance of temperature and concentration of solutes in the DS in affecting the water flux dynamic hybrid process. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. MDPI AG 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85090383236&doi=10.3390%2fmembranes10090225&partnerID=40&md5=eca4d87502abe56ee25c84605547e4bf Nawi, N.I.M. and Bilad, M.R. and Anath, G. and Nordin, N.A.H. and Kurnia, J.C. and Wibisono, Y. and Arahman, N. (2020) The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment. Membranes, 10 (9). pp. 1-13. http://eprints.utp.edu.my/30024/ |
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Standalone membrane distillation (MD) and forward osmosis (FO) have been considered as promising technologies for produced water treatment. However, standalone MD is still vulnerable to membrane-wetting and scaling problems, while the standalone FO is energy-intensive, since it requires the recovery of the draw solution (DS). Thus, the idea of coupling FO and MD is proposed as a promising combination in which the MD facilitate DS recovery for FO�and FO acts as pretreatment to enhance fouling and wetting-resistance of the MD. This study was therefore conducted to investigate the effect of DS temperature on the dynamic of water flux of a hybrid FO�MD. First, the effect of the DS temperature on the standalone FO and MD was evaluated. Later, the flux dynamics of both units were evaluated when the FO and DS recovery (via MD) was run simultaneously. Results show that an increase in the temperature difference (from 20 to 60� C) resulted in an increase of the FO and MD fluxes from 11.17 ± 3.85 to 30.17 ± 5.51 L m�2 h�1, and from 0.5 ± 0.75 to 16.08 L m�2 h�1, respectively. For the hybrid FO�MD, either MD or FO could act as the limiting process that dictates the equilibrium flux. Both the concentration and the temperature of DS affected the flux dynamic. When the FO flux was higher than MD flux, DS was diluted, and its temperature decreased; both then lowered the FO flux until reaching an equilibrium (equal FO and MD flux). When FO flux was lower than MD flux, the DS was concentrated which increased the FO flux until reaching the equilibrium. The overall results suggest the importance of temperature and concentration of solutes in the DS in affecting the water flux dynamic hybrid process. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
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Article |
| author |
Nawi, N.I.M. Bilad, M.R. Anath, G. Nordin, N.A.H. Kurnia, J.C. Wibisono, Y. Arahman, N. |
| spellingShingle |
Nawi, N.I.M. Bilad, M.R. Anath, G. Nordin, N.A.H. Kurnia, J.C. Wibisono, Y. Arahman, N. The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| author_facet |
Nawi, N.I.M. Bilad, M.R. Anath, G. Nordin, N.A.H. Kurnia, J.C. Wibisono, Y. Arahman, N. |
| author_sort |
Nawi, N.I.M. |
| title |
The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| title_short |
The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| title_full |
The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| title_fullStr |
The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| title_full_unstemmed |
The water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| title_sort |
water flux dynamic in a hybrid forward osmosis-membrane distillation for produced water treatment |
| publisher |
MDPI AG |
| publishDate |
2020 |
| url |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85090383236&doi=10.3390%2fmembranes10090225&partnerID=40&md5=eca4d87502abe56ee25c84605547e4bf http://eprints.utp.edu.my/30024/ |
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1738657049120604160 |
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13.211869 |