Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 533, Issue -, Pages 378-389Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2017.03.044
Keywords
Ultrafiltration; Ozone; Powered activated carbon; Peak-fitting; Parallel factor analysis
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Funding
- International Science and Technology Cooperation Program of China [2016YFE0123700]
- Chinese Postdoctoral Funds [0400229109]
- Technological Innovation Action Plan [15391912200]
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This work investigates the effects of combined ozone and powered activated carbon (PAC) pretreatment on ultrafiltration (UF) performance. High performance size exclusion chromatography (HPSEC) combined with peak-fitting prediction and fluorescence excitation-emission matrix spectroscopy coupled with parallel factor analysis (EEM-PARAFAC) were used to analyze membrane fouling and organic removal. We conclude that combined ozone and PAC pretreatment can significantly inhibit an increase in transmembrane pressure (TMP) whereby ozone plays a predominant role in delaying TMP increases. Ozone and activated carbon can greatly improve the removal efficiency of organic matter, especially that of macromolecular biopolymers, medium molecules of humic-like substances and small molecular acids and neutrals; however, the removal efficiency of aromatic proteins containing tyrosine is limited. Macromolecular biopolymers show high correlations with TMP/TMP0, followed by that of building blocks of low molecular acids and neutrals, while humic-like substances have a minor influence on UF membrane fouling. Fluorescence EEM is not valid for use as an indicator of membrane fouling after combined ozone and PAC treatment according to this study.
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