Enhancement of PVDF membrane anti-fouling ability based on critical flux: Effects of fabrication parameters and membrane properties

被引：0
作者：
Hou, Linxi [1 ]
Zhang, Jie [2 ]
Zhang, Xinying [3 ]
Wu, Zhichao [1 ]
Wang, Qiaoying [1 ]
机构：
[1] Tongji Univ, Coll Environm Sci & Engn, Shanghai Inst Pollut Control & Ecol Secur, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
[2] Huizhou Univ, Sch Chem & Mat Engn, 46 Yanda Rd, Huizhou 516007, Peoples R China
[3] Fuzhou Univ, Coll Environm & Safety Engn, Innovat Ctr Soil Remediat & Restorat Technol, Fuzhou 350108, Peoples R China
来源：
DESALINATION AND WATER TREATMENT | 2025年 / 321卷
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
PVDF membrane; Membrane fabrication; Membrane fouling; Membrane bioreactor; Critical flux; PHASE INVERSION PARAMETERS; WASTE-WATER TREATMENT; ULTRAFILTRATION MEMBRANE; BIOREACTORS; PVP; MBR; PERFORMANCE; FILTRATION; THERMODYNAMICS; SEPARATION;
D O I：
10.1016/j.dwt.2025.101061
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
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 mu m scraper clearance), the membrane was obtained with porous structure (68.16 f 0.49 % of porosity), guaranteed permeability (3316.85 f 32.74 L/(m(2)& sdot;h) of pure water flux) and improved hydrophilicity (59.33 f 0.39 degrees 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 f 4.65 L/(m(2)& sdot;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 x 10(7) m(-1)).
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页数：12
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