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

作　　者：Yue Zhou Wenjun Li Hongjun Hu Zhaohui Wang Zhaoliang Cui 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2025年第1期114-122,共9页中国化学工程学报(英文版)

基　　金：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：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 NH_(4)^(+)-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 

分 类 号：X70[环境科学与工程—环境工程]