Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties
Anti-fouling behavior of polyvinylidene fluoride (PVDF) membrane in membrane bioreactors (MBRs) can be enhanced by improving its physicochemical properties. To evaluate the membrane anti-fouling ability, this study comprehensively investigated the effect of variation in fabrication parameters (i.e....
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Elsevier
2025-01-01
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| Series: | Desalination and Water Treatment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625000773 |
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| author | Linxi Hou Jie Zhang Xinying Zhang Zhichao Wu Qiaoying Wang |
| author_facet | Linxi Hou Jie Zhang Xinying Zhang Zhichao Wu Qiaoying Wang |
| author_sort | Linxi Hou |
| collection | DOAJ |
| description | Anti-fouling behavior of polyvinylidene fluoride (PVDF) membrane in membrane bioreactors (MBRs) can be enhanced by improving its physicochemical properties. To evaluate the membrane anti-fouling ability, this study comprehensively investigated the effect of variation in fabrication parameters (i.e. PVDF and polyvinylpyrrolidone (PVP) concentration, scraper clearance and evaporation time) on membrane properties, especially critical flux. The result illustrated that membrane properties could be significantly improved (p < 0.05) with a lower PVDF concentration, appropriate PVP concentration and prolonged evaporation time. Under the optimal parameter (9 wt% PVDF, 5 wt% PVP, 40 s evaporation time and 200 μm scraper clearance), the membrane was obtained with porous structure (68.16 ± 0.49 % of porosity), guaranteed permeability (3316.85 ± 32.74 L/(m2·h) of pure water flux) and improved hydrophilicity (59.33 ± 0.39 ° of contact angle). The membrane with high porosity and pure water flux was more likely to enhance its critical flux through correlation analysis, and the optimized membrane also achieved the highest critical flux (42.35 ± 4.65 L/(m2·h)). Its anti-fouling performance was verified successfully in anaerobic-anoxic-oxic MBR system compared with the selected commercial membrane for long-term operation (41 days) and lower membrane resistance (214.52 × 107 m−1). |
| format | Article |
| id | doaj-art-58aa02ce60b44330b1f0fad5e48d7c64 |
| institution | OA Journals |
| issn | 1944-3986 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Desalination and Water Treatment |
| spelling | doaj-art-58aa02ce60b44330b1f0fad5e48d7c642025-08-20T02:11:05ZengElsevierDesalination and Water Treatment1944-39862025-01-0132110106110.1016/j.dwt.2025.101061Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane propertiesLinxi Hou0Jie Zhang1Xinying Zhang2Zhichao Wu3Qiaoying Wang4Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaSchool of Chemistry and Materials Engineering, Huizhou University, 46 Yanda Road, Huizhou 516007, ChinaInnovation Center for Soil Remediation and Restoration Technologies, College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, ChinaShanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaShanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Corresponding author.Anti-fouling behavior of polyvinylidene fluoride (PVDF) membrane in membrane bioreactors (MBRs) can be enhanced by improving its physicochemical properties. To evaluate the membrane anti-fouling ability, this study comprehensively investigated the effect of variation in fabrication parameters (i.e. PVDF and polyvinylpyrrolidone (PVP) concentration, scraper clearance and evaporation time) on membrane properties, especially critical flux. The result illustrated that membrane properties could be significantly improved (p < 0.05) with a lower PVDF concentration, appropriate PVP concentration and prolonged evaporation time. Under the optimal parameter (9 wt% PVDF, 5 wt% PVP, 40 s evaporation time and 200 μm scraper clearance), the membrane was obtained with porous structure (68.16 ± 0.49 % of porosity), guaranteed permeability (3316.85 ± 32.74 L/(m2·h) of pure water flux) and improved hydrophilicity (59.33 ± 0.39 ° of contact angle). The membrane with high porosity and pure water flux was more likely to enhance its critical flux through correlation analysis, and the optimized membrane also achieved the highest critical flux (42.35 ± 4.65 L/(m2·h)). Its anti-fouling performance was verified successfully in anaerobic-anoxic-oxic MBR system compared with the selected commercial membrane for long-term operation (41 days) and lower membrane resistance (214.52 × 107 m−1).http://www.sciencedirect.com/science/article/pii/S1944398625000773PVDF membraneMembrane fabricationMembrane foulingMembrane bioreactorCritical flux |
| spellingShingle | Linxi Hou Jie Zhang Xinying Zhang Zhichao Wu Qiaoying Wang Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties Desalination and Water Treatment PVDF membrane Membrane fabrication Membrane fouling Membrane bioreactor Critical flux |
| title | Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties |
| title_full | Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties |
| title_fullStr | Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties |
| title_full_unstemmed | Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties |
| title_short | Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties |
| title_sort | enhancement of pvdf membrane anti fouling ability based on critical flux effects of fabrication parameters and membrane properties |
| topic | PVDF membrane Membrane fabrication Membrane fouling Membrane bioreactor Critical flux |
| url | http://www.sciencedirect.com/science/article/pii/S1944398625000773 |
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