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

doi:10.11949/j.issn.0438-1157.20160059

化工学报 ›› 2016, Vol. 67 ›› Issue (9): 3954-3964.DOI: 10.11949/j.issn.0438-1157.20160059

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

柴俪洪^1,2, 肖长发¹, 权全¹, 刘海亮¹, 陈明星¹, 赵斌²

1 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 300387;
2 天津工业大学环境与化学工程学院, 天津 300387

收稿日期:2016-01-15 修回日期:2016-05-05 出版日期:2016-09-05 发布日期:2016-09-05
通讯作者: 肖长发
基金资助:
国家自然科学基金项目（21274109）。

Membrane fouling and dealing with domestic sewage in MBR of homogeneous enhanced PMIA hollow fiber membranes

CHAI Lihong^1,2, XIAO Changfa¹, QUAN Quan¹, LIU Hailiang¹, CHEN Mingxing¹, ZHAO Bin²

1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
2 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China

Received:2016-01-15 Revised:2016-05-05 Online:2016-09-05 Published:2016-09-05
Supported by:
supported by the National Natural Science Foundation of China (21274109).

摘要/Abstract

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、NH₄⁺-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。

关键词: 中空纤维膜, 聚间苯二甲酰间苯二胺, 膜污染, 数学模型, 膜生物反应器

Abstract:

The fouling mechanisms of the homogeneous enhanced aromatic poly(m-phenyleneisophthalamide) (PMIA) hollow fiber membranes were determined by experimental data fitting to pore blocking model or cake fouling model, and combined with the membrane pore size distribution, particle size distribution of filter mediums and the membrane resistance distribution during ultrafiltration. Three materials (CaCO₃ suspension, activated sludge and BSA solution) which could induce fouling were used to be filter mediums. In addition, homogeneous enhanced PMIA hollow fiber membranes were applied to membrane bioreactor (MBR) system to deal with domestic sewage. At the meantime, the cleaning effects of water and chemical were analyzed by field emission scanning electron microscopy (FESEM), and the change of quality fraction of inorganic elements after fouling and cleaning of membrane outer surface was performed by energy dispersive X-ray spectrometer (EDX). The results showed that when the filter medium was BSA, the linear correlation coefficient (t-t/V) was 0.9940. Thus, the main type of the membrane fouling in ultrafiltration of BSA solution was attributed to pore blocking. Owing to the linear correlation coefficient(V-t/V) was 0.9733 and 0.9994, respectively, the membrane fouling caused by CaCO₃ suspension and activated sludge was conformed to cake layer formation. Moreover, the MBR operating results showed that the average removal of COD,NH₄⁺-N and TP was up to 97.78%, 96.71% and 49.81%, respectively, being beneficial to improve the effluent quality. Furthermore, the chemical cleaning experiment demonstrated that the kinds of inorganic elements of the membrane outer surface were close to the original film. The pollutants were easier to be removed by chemical cleaning.

Key words: hollow fiber membrane, PMIA, membrane fouling, mathematical model, membrane bioreactor(MBR)

中图分类号:

X703

柴俪洪, 肖长发, 权全, 刘海亮, 陈明星, 赵斌. 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[J]. 化工学报, 2016, 67(9): 3954-3964.

CHAI Lihong, XIAO Changfa, QUAN Quan, LIU Hailiang, CHEN Mingxing, ZHAO Bin. Membrane fouling and dealing with domestic sewage in MBR of homogeneous enhanced PMIA hollow fiber membranes[J]. CIESC Journal, 2016, 67(9): 3954-3964.

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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

Membrane fouling and dealing with domestic sewage in MBR of homogeneous enhanced PMIA hollow fiber membranes

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