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The antifouling performance for Polyvinylidene Fluoride membrane modified by Plasma treatment in a MBR

Authors： LI Peng1, YANG Qin1,2,3,*, DIN Yun1, LIU Junjie1, TA Xinxin1, MA Yanhong1

Units： (1. School of Environmental and Municipal Engineering, Lanzhou Jiao tong University;

KeyWords： plasma; Polyvinylidene fluoride(PVDF); MBR; cake layer

ClassificationCode：X316

year,volume(issue):pagination： 2014,34(3):110-115

Abstract：

Polyvinylidene fluoride (PVDF) hollow fiber ultrafiltration membrane was modified by acrylic acid (AA) plasma chemical sedimentary. The experiments of fourier attenuated total reflection infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), EDS and mechanical properties test analysis showed that after modified, there were some carboxyl in the membrane surface, and AA monomer was grafted successfully. Meanwhile, the flexibility of modified membrane was improved, and water flux increased by 12.04%-16.12%. Using submerged MBR reactor, gas-water ratio with 20:1，the modified membrane and the original membrane were made parallel contrast experiment. The result showed that the change of surface properties of membrane can hinder sedimentary and compacting of cake layer pollutants effectively on the membrane surface. After hydraulic and chemical cleaning, the flux recovery rate of modified membrane flux recovery rate is slightly higher than the original film, so the ability of resistance cake layer pollutants modified membrane is stronger than original membrane. The effluent turbidity of membrane and original membrane were 0 NTU, and the COD removal rate showed that the water effect of modified membrane is better than the original membrane.

Funds：

国家自然科学基金资助项目（50578072）；教育部长江学者创新团队（IRT0966）；寒旱地区水资源综合利用教育部工程中心

AuthorIntro：

李鹏(1990-)，男，甘肃定西，工学硕士，研究方向为水处理技术；联系方式：15117022708，E-mail:liplzjtu@126.com. *通讯作者：杨庆（1974—），男，教授；研究方向为水处理技术；联系方式：13993148205，E-mail:yangq@mail.lzjtu.cn

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