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MBfR中改性PVDF疏水中空纤维膜表面微生物附着生长特性研究
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  • 英文篇名:The attachment and growth of microorganism on the surface of modified PVDF hydrophobic hollow fiber membrane in MBfR
  • 作者:郭东岳 ; 于越 ; 王暄 ; 吕晓龙 ; 袁晓彤 ; 张利娟
  • 英文作者:GUO Dongyue;YU Yue;WANG Xuan;LV Xiaolong;YUAN Xiaotong;ZHANG Lijuan;State Key Laboratory of Separation Membranes and Membrane Processes,School of Environmental and Chemical Engineering,Tianjin Polytechnic University;
  • 关键词:膜生物膜反应器(MBfR) ; 疏水性PVDF中空纤维膜 ; 表面改性 ; 生物亲和性
  • 英文关键词:membrane biofilm reactor(MBfR);;hydrophobic PVDF hollow fiber membrane;;surface modification;;biological affinity
  • 中文刊名:MKXY
  • 英文刊名:Membrane Science and Technology
  • 机构:分离膜与膜过程国家重点实验室环境与化学工程学院天津工业大学;
  • 出版日期:2018-08-25
  • 出版单位:膜科学与技术
  • 年:2018
  • 期:v.38;No.191
  • 基金:国家自然科学基金(51408415);国家自然科学基金项目(21576210)
  • 语种:中文;
  • 页:MKXY201804012
  • 页数:8
  • CN:04
  • ISSN:62-1049/TB
  • 分类号:60-67
摘要
针对膜生物膜反应器(MBfR)研究中疏水性微孔膜供氧能力不足、生物亲和性能较差等问题,采用界面聚合及自聚合法对自制的疏水性聚偏氟乙烯(PVDF)中空纤维膜进行表面改性,制备出适合于MBfR技术的PVDF/DOPA改性膜与PVDF/TMC-CS改性膜.选取混合微生物体系研究微生物在原膜和改性膜表面上的粘附生长情况,评价了3种膜材料生物亲和性的差异,并对3种膜材料表面生物膜的MBfR有机物及氨氮处理特性进行了初步研究.研究结果表明,与原膜相比,PVDF/DOPA改性膜在微生物附着生长实验后生长的微生物厚度最高,为25μm,微生物膜优先成熟且附着的微生物数量较多,表明PVDF/DOPA改性膜的生物亲和性最高;附着微生物的PVDF/DOPA改性膜废水处理能力较高,对TOC和NH4+-N的去除效果可稳定保持在93.48%、84.74%左右,同时对废水的抗有机冲击负荷能力明显优于另两种膜材料系统.
        Aiming at the insufficient oxygen supply capacity and bioaffinity property of hydrophobic microporous membrane in MBfR,hydrophobic PVDF hollow fiber membrane was modified by selfpolymerization and interfacial polymerization to prepare surface modified membranes of PVDF/DOPA and PVDF/TMC-CS that suitable for MBfR technology.In this thesis using mixed microorganism as biological indicator in biological affinity,the attachment and growth on membranes to evaluate the difference of biological affinity between the different membranes were studied.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 25μm after attachment and growth of microorganism; biofilm thickness preferentially matured with more microorganism attached which indicated that the PVDF/DOPA modified membrane has the highest biological affinity;after microorganism was attached and growed,the effects of PVDF/DOPA modified membrane on TOC and NH_4~+-N were stable at 93.48% and 84.74%respectively,capacities of sewage treatment and anti-organic impact load were significantly better than that of other membranes.
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