同质增强型PMIA中空纤维膜污染及其MBR工艺处理城市生活污水

发布时间：2017-12-31 17:37

本文关键词：同质增强型PMIA中空纤维膜污染及其MBR工艺处理城市生活污水　出处：《化工学报》2016年09期 　论文类型：期刊论文

【摘要】：以碳酸钙悬浮液、活性污泥混合液及蛋白溶液作为过滤介质,采用标准堵塞过滤和沉积过滤数学模型预测3 h内膜污染类型,结合膜孔径分布、过滤介质粒径分布和污染阻力分布,研究同质增强型聚间苯二甲酰间苯二胺(PMIA)中空纤维超滤膜污染机理。将同质增强型PMIA中空纤维膜应用于MBR系统处理城市生活污水,监测其长期运行的出水水质;借助场发射扫描电镜和特征X射线能谱仪对比分析水洗和化学清洗效果。研究结果表明,当过滤介质为蛋白时,t-t/V线性相关系数为0.9940,膜污染符合标准堵塞模型;当过滤介质为碳酸钙悬浮液和污泥混合液时,V-t/V线性相关系数分别为0.9733、0.9994,二者较为符合沉积模型。应用于MBR中的同质增强型PMIA中空纤维膜对COD、NH_4~+-N、TP的平均去除率分别为97.78%、96.71%、49.81%,出水水质较好。经化学清洗后膜表面元素接近于原膜,清洗效果较佳。
[Abstract]:The calcium carbonate suspension, activated sludge and protein solution as the filter medium, using standard blocking filtration and sedimentation filtration mathematical model for predicting 3 h endometrial pollution type, combined with membrane filtration medium pore size distribution, particle size distribution and pollution resistance distribution of homogeneous enhanced poly two formyl amine benzene two (PMIA) hollow fiber ultrafiltration membrane fouling mechanism. The homogeneous enhanced PMIA hollow fiber membrane used in MBR system of city sewage treatment, monitoring the running state of the water quality; by means of field emission scanning electron microscopy and X ray spectrometer comparative analysis of water and chemical cleaning effect. The results show that, when the filter media for protein. T-t/V linear correlation coefficient is 0.9940, the membrane pollution standard blocking model; when the filter medium is calcium carbonate suspension and sludge mixture, V-t/V linear correlation coefficients were 0.9733,0.9994, two The average removal rate of COD, NH_4~+-N and TP for MBR is 97.78%, 96.71% and 49.81%, respectively, and the effluent quality is better. After chemical cleaning, the surface elements of PMIA are close to the original membrane, and the cleaning effect is better.

【作者单位】：天津工业大学省部共建分离膜与膜过程国家重点实验室;天津工业大学环境与化学工程学院;
【分类号】：X703
【正文快照】： 引言膜生物反应器(MBR)是一种融合传统废水生物处理技术和膜分离技术的新型污水处理技术,具有对污染物去除效率高、出水水质稳定、操作管理方便等优势,已在污水处理中得到广泛应用[1-3]。目前,应用于MBR技术的膜材料包括无机膜和有机膜。无机膜材料虽然具有很强的耐高温、耐污

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