MABR用中空纤维膜制备及性能研究

摘要探究了制膜条件对热致相分离法制备的聚丙烯中空纤维膜性能的影响,制备出孔径分布窄、泡点压力高的中空纤维膜。用邻苯二酚(CCh)-聚乙烯亚胺(PEI)共沉积法对膜进行了改性,对膜的形貌、性能进行了表征和测试。改性后接触角降低,表面电位提高。膜曝气式生物膜反应器(MABR)实验结果表明,改性膜挂膜时间短,氧总传递系数增大约3倍,COD去除率达89.0%,NH⁺₄-N去除率达89.3%。改性膜也表现出良好的抗污染能力,在连续运行20 d后氧总传递系数降幅4.6%,远低于原膜降幅27.9%。

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	纪清源
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关键词：膜曝气式生物膜反应器(MABR) 表面改性中空纤维膜热致相分离邻苯二酚聚乙烯亚胺

Abstract： The polypropylene hollow fiber membranes were prepared by the thermally induced phase separation method and the effect of preparing conditions on the properties of membranes was investigated in this paper. The resulted hollow fiber membranes have the advantage of narrow pore size distribution and high bubble point pressure. We also modified the membranes by the co-deposition of catechol (CCh) and polyethyleneimine (PEI). After the modification, the membranes have lower contact angle and higher Zeta potential. Membrane aerated biofilm reactor (MABR) experiments reveal that the modified membranes take less time to complete bioadhesion and the total oxygen transfer coefficient increases by about 3 times, with a COD degradation rate of 89.0% and an ammonia nitrogen degradation rate of 89.3%. The modified membranes also show good anti-fouling ability. After the continuous operation for 20 d, the decrease of modified membranes in total oxygen transfer coefficient is 4.6%, much less than that of the original membranes (27.9%).

Keywords： membrane aerated biofilm reactor (MABR) surface modification hollow fiber membranes thermally induced phase separation catechol polyethyleneimide

Received 2023-04-13;

Corresponding Authors: 解利昕,研究员,xie_lixin@tju.edu.cn。 Email: xie_lixin@tju.edu.cn

About author: 纪清源(1997—),女,硕士研究生,现从事化工分离和水处理方面的研究。

引用本文:

纪清源, 解利昕, 吴怡萱, 徐世昌.MABR用中空纤维膜制备及性能研究[J]. 化学工业与工程, 2025,42(2): 80-88

JI Qingyuan, XIE Lixin, WU Yixuan, XU Shichang.Preparation and properties of hollow fiber membrane for MABR[J]. Chemcial Industry and Engineering, 2025,42(2): 80-88

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