首页|Eco-friendly regeneration of end-of-life PVDF membrane with triethyl phosphate:Efficiency and mechanism
Eco-friendly regeneration of end-of-life PVDF membrane with triethyl phosphate:Efficiency and mechanism
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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 mem-brane 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±45.7L 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 sub-jected 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 15.2L 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 guarantee-ing 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.
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
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