Eco-friendly regeneration of end-of-life PVDF membrane with triethyl phosphate:Efficiency and mechanism  

作　　者：Lingna Wang Chenxin Tian Ruobin Dai Zhiwei Wang 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse,Shanghai Institute of Pollution Control and Ecological Security,School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China

出　　处：《Chinese Chemical Letters》2024年第9期315-319,共5页中国化学快报（英文版）

基　　金：National Natural Science Foundation of China(Nos.51925806 and 52200108)for the financial support of the work;supported by the Chenguang Program of Shanghai Education Development Foundation;Shanghai Municipal Education Commission。

摘　　要：Membrane will inevitably reach the end of its lifespan due to the irrecoverable fouling accumulation in membrane bioreactors(MBRs)during long-term operation.Herein,we developed an eco-friendly membrane regeneration strategy with triethyl phosphate(TEP),which successfully prolonged the lifespan of end-of-life(EOL)polyvinylidene fluoride(PVDF)membranes in a large-scale MBR.The regenerated(Rg)membrane exhibited a water permeance of 534.8±45.7 L m^(-2)h^(-1)bar-1,along with stable rejection rate,which was comparable with that of the new membrane.Furthermore,compared to the membrane subjected solely to preliminary cleaning,the Rg membrane presented a more hydrophilic surface due to the combination of preliminary cleaning and solvent-based processing.Besides,the Rg membrane presented less fouling propensity with the critical flux of 15.2 L m^(-2)h^(-1),significantly higher than that of the EOL membrane(4.0 L m^(-2)h^(-1)).Importantly,the membrane regeneration strategy was capable of guaranteeing the effluent quality in MBR systems for treating real municipal wastewater.This study provides an eco-friendly membrane regeneration strategy for effectively removing the irrecoverable foulants,thereby promoting the advancement of sustainable membrane-based wastewater treatment technology.

关 键 词：End-of-life membrane regeneration Membrane bioreactor Preliminary cleaning Solvent-based processing Irrecoverable fouling removal 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]