期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 25, 期 25, 页码 25227-25242出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-2613-y
关键词
Hydrophilic modification; Nano-particle; Ultrafiltration membrane; Anti-organic fouling; Anti-biofouling; Wastewater treatment; MBR
资金
- Program of International ST Cooperation [2016YFE0123400]
- National Natural Science Foundation of China [51678183, 51408149]
- Shenzhen Science and Technology Funding Project [JCYJ20160406162038258]
- Guangdong Natural Science Foundation [2017A030313285]
Two hydrophilic poly-vinylidene fluoride (PVDF) ultrafiltration membranes were prepared via in situ embedment of nanoparticles (NP), i.e., TiO2 and Al2O3, respectively, and their anti-organic-fouling and anti-biofouling were comprehensively investigated. Characterization of modified PVDF-NP membranes by XRD and FTIR exhibited that nanoparticles were embedded successfully. Series of fast filtration tests demonstrated that in contrary to virgin PVDF membrane, PVDF-NP membranes have high permeability and anti-organic-fouling ability by decreasing the possibility of organic matters deposition and accumulation. Co-existed Ca2+ in feed solution deteriorated the organic fouling in virgin PVDF and PVDF-NP membranes, which was mainly caused by gelation of macromolecular foulants. PVDF-NP membranes were used to form MBR modules for domestic wastewater treatment, and the long-term monitoring evidenced that hydrophilic modified membranes achieved stably high COD and rejection efficiencies, and better organic rejection capability than mAO process. PVDF-NP membranes possessed consistently high anti-biofouling ability to maintain stable membrane permeability.
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