膜材料对膜曝气生物膜反应器性能影响的比较

发布时间：2018-04-29 19:38

本文选题：MABR + PVDF　；参考：《化工学报》2016年04期

【摘要】：选择聚偏氟乙烯(PVDF)和聚丙烯(PP)中空纤维曝气膜作为膜曝气生物膜反应器(MABR)的膜组件材料,比较两种膜材料由于亲疏水性能、表面形态、生物相容性等性质的差别,对MABR挂膜启动速度、生物附着量、脱氮除碳及膜污染等性能的影响。研究显示,运行末期PVDF和PP膜纤维生物附着量分别为35.62 g·m~(-2)和30.63 g·m~(-2)。通过场发射扫描电子显微镜观察两种膜表面生物污染情况,PVDF膜纤维表面呈鱼鳞状结构,有效保护了膜孔不被微生物完全堵塞。在90 d的运行周期内以PVDF为曝气膜材料的MABR获得了90%以上的COD去除率和78%的TN去除率;而以PP为曝气膜的MABR由于运行后期曝气膜纤维污染严重仅得到了76.5%的COD去除率和49.1%的TN去除率。因此,PVDF曝气纤维更适于作膜曝气生物膜反应器的曝气膜。
[Abstract]:Poly (vinylidene fluoride PVDF) and polypropylene (PP) hollow fiber aerated membranes were selected as membrane component materials for membrane aeration biofilm reactor (MBR). The differences of the two membrane materials due to their hydrophobicity, surface morphology and biocompatibility were compared. The effects on the start-up speed, biological adhesion, nitrogen and carbon removal and membrane fouling of MABR were investigated. The results showed that the bioadhesion of PVDF and PP membrane fibers at the end of operation was 35.62 g / m ~ (-2) and 30.63 g / m ~ (-2) respectively. Two kinds of membrane surface biological contamination were observed by field emission scanning electron microscope (SEM). PVDF membrane fiber surface was fish scale structure, which effectively protected the membrane pore from being completely blocked by microorganism. Over 90% COD removal rate and 78% TN removal rate were obtained in MABR with PVDF as aeration membrane material in 90 days. However, MABR with PP as aeration membrane had only 76.5% COD removal rate and 49.1% TN removal efficiency due to serious aeration membrane fiber pollution in the later stage of operation. Therefore, PVDF aerated fiber is more suitable for aeration membrane in membrane aeration biofilm reactor.
【作者单位】：天津工业大学环境与化学工程学院;天津工业大学省部共建分离膜与膜过程国家重点实验室;中海油天津化工研究设计院国家工业水处理工程技术研究中心;
【基金】：国家自然科学基金项目(51108316) 中国博士后科学基金项目(2015M571267) 天津市科技计划项目(14ZCDGSF00128)~~
【分类号】：X703.1

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