Journal
DESALINATION AND WATER TREATMENT
Volume 56, Issue 7, Pages 1746-1757Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2014.951972
Keywords
Normalized fouling rate; Membrane properties; Feed water quality; Critical flux; Critical flux for irreversibility
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Funding
- Major Science and Technology Program for Water Pollution Control and Treatment [2012ZX07404-003]
- Program for New Century Excellent Talents in University [NCET-13-0169]
- China Postdoctoral Science Foundation [2013M540293]
- Science and Technology Planning Project of Chancheng District [2013A1044]
- Fundamental Research Funds for the Central University
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The effect of membrane properties, feed water quality, and permeate flux on ultrafiltration (UF) membrane fouling was systematically investigated. Fouling tests were carried out with three types of commercially available UF membrane and a variety of influents. The membrane fouling was assessed by the normalized fouling rate (F-500). The results showed that the PVDF membrane with smaller contact angle was more resistant to membrane fouling than the PVC membrane. As for feed water parameters, significant correlations were observed between turbidity, total organic carbon, UV254, fluorescence intensity, and membrane fouling rates using Pearson Correlation Analysis. This was especially true for hydraulically irreversible fouling rate (F-irr). Moreover, significant correlations between permeate fluxes and membrane fouling rates were observed. With these correlations, the critical flux and critical flux for irreversibility were calculated. It was found that the critical flux is strongly depended on feed water composition rather than membrane properties. Particulate matter, with a size of 0.45-1.2m in diameter, was proved to increase the critical flux and critical flux for irreversibility.
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