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The attachment and growth of Microorganism on the surface modified PVDF hydrophobic hollow fiber membrane in MBfR

Authors： Guo Dongyue, Yu Yue ,Wang Xuan, Lu Xiaolong, Yuan Xiaotong,Zhang Lijuan

Units： State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University

KeyWords： Membrane Biofilm Reactor (MBfR); hydrophobic PVDF hollow fiber membrane; surface modification; biological affinity

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2018,38(4):56-63

Abstract：

Aiming at the insufficient oxygen supply capacity and bioaffinity property of hydrophobic microporous membrane in MBfR, hydrophobic PVDF hollow fiber membrane was modified by self-polymerization and interfacial polymerization to prepare surface modified membrane of PVDF/DOPA and PVDF/TMC-CS that suitable for MBfR technology. In this thesis use mixed microorganism as biological indicator in biological affinity, studying the attachment and growth on membranes to evaluate the difference of biological affinity between the different membranes. The preliminary study on the removal characteristics of different membrane was carried out. The results showed that, compared with the PVDF membrane, the PVDF / DOPA modified membrane had the highest Microorganism thickness of 25 μm after the Microorganism attachment and growth. biofilm thickness preferentially matured with more microorganism attached, indicating that the PVDF/DOPA modified membrane have the highest biological affinity; after microorganism attached and growed, the effect of PVDF/DOPA modified membrane on TOC and NH4+-N was stable at 93.48% and 84.74%, capacity of sewage treatment and anti-organic impact load was significantly better than that of other membranes.

Funds：

国家自然科学基金(51408415)，国家自然科学基金项目(21576210)

AuthorIntro：

作者简介：郭东岳（1992-），女，硕士研究生，疏水性PVDF膜表面改性及MBfR应用研究。通讯联系人：Email：xuanwang@tjpu.edu.cn；E-mail：luxiaolong@263.net

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