DOPA/PEI surface-modified poly-4-methyl-1-pentene membranes and application in membrane aeration biofilm reactor

doi:10.1016/j.cjche.2024.10.007

中国化学工程学报 ›› 2025, Vol. 77 ›› Issue (1): 114-122.DOI: 10.1016/j.cjche.2024.10.007

DOPA/PEI surface-modified poly-4-methyl-1-pentene membranes and application in membrane aeration biofilm reactor

Yue Zhou^1,2, Wenjun Li^1,2, Hongjun Hu^1,2, Zhaohui Wang^1,2, Zhaoliang Cui^1,2

1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2. National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China

收稿日期:2024-06-17 修回日期:2024-10-13 接受日期:2024-10-15 出版日期:2025-01-28 发布日期:2024-11-17
通讯作者: Zhaohui Wang,E-mail:zhwang@njtech.edu.cn;Zhaoliang Cui,E-mail:zcui@njtech.edu.cn
作者简介:Dr. Zhaoliang Cui graduated from Nanjing Tech University with a doctorate in Engineering. From September 2011 to May 2014, he served as a postdoctoral and research assistant professor at Hanyang University in South Korea. In 2014, he returned to China and served as a professor in Nanjing University of Technology, established the organic/ultrafiltration membrane research group, and presided over projects such as the National Natural Science Foundation of China, the Natural Science Foundation of Jiangsu Province and the Launching Fund for the Return of Overseas Students of the Ministry of Education. His research interests include theoretical research and industrialization of polymer porous membranes for water treatment applications, and development of ECMO materials.
Yue Zhou obtained her master’s degree in Chemical Engineering from Nanjing Tech University in 2018. Since then, she has been working as an assistant laboratory engineer at the university, specializing in research on membrane processes, surface modifications for membranes, and the utilization of membrane technology in water treatment.
基金资助:
The authors would like to express their appreciation for the financial supported by the National Key Research and Development Program of China (2023YFB3810502), the National Natural Science Foundation of China (22078146), the Key Research and Development program of Anhui Province (2023h11020004).

DOPA/PEI surface-modified poly-4-methyl-1-pentene membranes and application in membrane aeration biofilm reactor

Yue Zhou^1,2, Wenjun Li^1,2, Hongjun Hu^1,2, Zhaohui Wang^1,2, Zhaoliang Cui^1,2

1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2. National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China

Received:2024-06-17 Revised:2024-10-13 Accepted:2024-10-15 Online:2025-01-28 Published:2024-11-17
Contact: Zhaohui Wang,E-mail:zhwang@njtech.edu.cn;Zhaoliang Cui,E-mail:zcui@njtech.edu.cn
Supported by:
The authors would like to express their appreciation for the financial supported by the National Key Research and Development Program of China (2023YFB3810502), the National Natural Science Foundation of China (22078146), the Key Research and Development program of Anhui Province (2023h11020004).

摘要/Abstract

摘要： The membrane aeration biofilm reactor (MABR) represents an innovative approach to wastewater treatment, integrating gas separation membranes with biofilm process and demonstrating effectiveness in treating wastewater rich in ammonia nitrogen. In this system, hollow fiber membranes are essential, serving as a substrate for biofilm attachment while facilitating oxygen transfer to microorganisms through aeration, hydrophobic microporous membranes are utilized in MABR applications. This study focuses on the use of poly-4-methyl-1-pentene (PMP) hollow fiber membranes, which exhibit superior oxygen permeation capabilities compared to traditional hydrophobic microporous membranes. To overcome the challenges posed by the hydrophobic nature and low bubble point of PMP microporous membranes, a hydrophilic modification was conducted using dopamine/poly(ethyleneimine) (DOPA/PEI) co-deposition to enhance microbial adhesion on the membrane surface. The composite membrane modified with DOPA/PEI exhibited an approximately 20% higher NH₄⁺-N removal efficiency than the unmodified membrane. These findings suggest that the incorporation of DOPA/PEI significantly improves MABR performance, underscoring its potential for further research and development in membrane technology for MABR.

关键词: Membrane aeration biofilm reactor, Poly(4-methyl-1-pentene), Hollow fiber membrane, Co-deposition modification

Abstract: The membrane aeration biofilm reactor (MABR) represents an innovative approach to wastewater treatment, integrating gas separation membranes with biofilm process and demonstrating effectiveness in treating wastewater rich in ammonia nitrogen. In this system, hollow fiber membranes are essential, serving as a substrate for biofilm attachment while facilitating oxygen transfer to microorganisms through aeration, hydrophobic microporous membranes are utilized in MABR applications. This study focuses on the use of poly-4-methyl-1-pentene (PMP) hollow fiber membranes, which exhibit superior oxygen permeation capabilities compared to traditional hydrophobic microporous membranes. To overcome the challenges posed by the hydrophobic nature and low bubble point of PMP microporous membranes, a hydrophilic modification was conducted using dopamine/poly(ethyleneimine) (DOPA/PEI) co-deposition to enhance microbial adhesion on the membrane surface. The composite membrane modified with DOPA/PEI exhibited an approximately 20% higher NH₄⁺-N removal efficiency than the unmodified membrane. These findings suggest that the incorporation of DOPA/PEI significantly improves MABR performance, underscoring its potential for further research and development in membrane technology for MABR.

Key words: Membrane aeration biofilm reactor, Poly(4-methyl-1-pentene), Hollow fiber membrane, Co-deposition modification

Yue Zhou, Wenjun Li, Hongjun Hu, Zhaohui Wang, Zhaoliang Cui. DOPA/PEI surface-modified poly-4-methyl-1-pentene membranes and application in membrane aeration biofilm reactor[J]. 中国化学工程学报, 2025, 77(1): 114-122.

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DOPA/PEI surface-modified poly-4-methyl-1-pentene membranes and application in membrane aeration biofilm reactor

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