Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process
Membrane distillation (MD) is a technology that can treat feed solutions with higher osmotic pressure, as well as produce high-purity water. However, the water production cost of the MD process is expensive. In this study, to decrease the water production cost, we attempted to evaluate the effect of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/11/4/252 |
| _version_ | 1797539428981276672 |
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| author | Yuki Suga Ryousuke Takagi Hideto Matsuyama |
| author_facet | Yuki Suga Ryousuke Takagi Hideto Matsuyama |
| author_sort | Yuki Suga |
| collection | DOAJ |
| description | Membrane distillation (MD) is a technology that can treat feed solutions with higher osmotic pressure, as well as produce high-purity water. However, the water production cost of the MD process is expensive. In this study, to decrease the water production cost, we attempted to evaluate the effect of membrane characteristics on the long-term stability of a vacuum MD (VMD) system. We fabricated four different types of polyvinylidene difluoride hollow fiber membranes, and operated a VMD system with 3.5 wt% NaCl aqueous solution at 65 °C as a feed under 11 kPa of air gap pressure. Consequently, in the proposed VMD system, it is found that the liquid entry pressure (LEP) is the most important factor. When LEP was higher than 0.37 MPa, the pilot-scale module was very stable for long-term operations, and the vapor flux was approximately 19.3 kg/m<sup>2</sup>·h with a total salt retention factor of over 99.9% during the 300-h operation. |
| first_indexed | 2024-03-10T12:45:56Z |
| format | Article |
| id | doaj.art-d5aefed4122c444aaca9a18995944d36 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T12:45:56Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-d5aefed4122c444aaca9a18995944d362023-11-21T13:31:10ZengMDPI AGMembranes2077-03752021-03-0111425210.3390/membranes11040252Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation ProcessYuki Suga0Ryousuke Takagi1Hideto Matsuyama2Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Nada, Kobe 657-8501, JapanResearch Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Nada, Kobe 657-8501, JapanResearch Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Nada, Kobe 657-8501, JapanMembrane distillation (MD) is a technology that can treat feed solutions with higher osmotic pressure, as well as produce high-purity water. However, the water production cost of the MD process is expensive. In this study, to decrease the water production cost, we attempted to evaluate the effect of membrane characteristics on the long-term stability of a vacuum MD (VMD) system. We fabricated four different types of polyvinylidene difluoride hollow fiber membranes, and operated a VMD system with 3.5 wt% NaCl aqueous solution at 65 °C as a feed under 11 kPa of air gap pressure. Consequently, in the proposed VMD system, it is found that the liquid entry pressure (LEP) is the most important factor. When LEP was higher than 0.37 MPa, the pilot-scale module was very stable for long-term operations, and the vapor flux was approximately 19.3 kg/m<sup>2</sup>·h with a total salt retention factor of over 99.9% during the 300-h operation.https://www.mdpi.com/2077-0375/11/4/252membrane distillationhollow fiber membranepolyvinylidene difluoridehydrophobic treatmentlong term operationliquid entry pressure |
| spellingShingle | Yuki Suga Ryousuke Takagi Hideto Matsuyama Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process Membranes membrane distillation hollow fiber membrane polyvinylidene difluoride hydrophobic treatment long term operation liquid entry pressure |
| title | Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process |
| title_full | Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process |
| title_fullStr | Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process |
| title_full_unstemmed | Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process |
| title_short | Effect of the Characteristic Properties of Membrane on Long-Term Stability in the Vacuum Membrane Distillation Process |
| title_sort | effect of the characteristic properties of membrane on long term stability in the vacuum membrane distillation process |
| topic | membrane distillation hollow fiber membrane polyvinylidene difluoride hydrophobic treatment long term operation liquid entry pressure |
| url | https://www.mdpi.com/2077-0375/11/4/252 |
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