title: Surface modification of PVDF hollow fiber membrane and its application in membrane aerated biofilm reactor (MABR).
abstract: A novel composite hollow fiber membrane for membrane aerated biofilm rector (MABR) was prepared by coating L-3,4-dihydroxyphenylalanine (DOPA) on the surface of PVDF membrane. MABR process study was conducted to test the performances of the original and modified membranes for 166 days. The results indicate that coated membrane showed 2 times higher gas flux, lower water contact angle (declined from 86.5° to 52°), and significantly improved surface roughness. The modified membrane displayed an excellent MABR performance. Its COD, NH4(+)-N and TN removal efficiencies were kept above 90%, 98.8% and 84.2% during the first 4-month experiment. By tracking experiment at 0.01 MPa, to achieve COD removal efficiency of 85.9%, half an hour is required with the modified membrane, instead of 6h using the original one. Besides, faster NH4(+)-N and TN removal at 0.01 MPa were also achieved with DOPA composite membrane.
authors.affiliation: Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
authors.forename: Feifei
authors.initials: F
authors.lastname: Hou
authors.forename: Baoan
authors.initials: B
authors.lastname: Li
authors.forename: Minghao
authors.initials: M
authors.lastname: Xing
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.forename: Liang
authors.initials: L
authors.lastname: Hu
authors.forename: Shichang
authors.initials: S
authors.lastname: Wang
mesh_terms: D000332:Aerobiosis; D064751:Ammonium Compounds / Q000032:analysis; D001419:Bacteria / Q000378:metabolism; D001673:Biodegradation, Environmental; D018441:Biofilms / Q000254:growth & development*; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D005740:Gases / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D009566:Nitrates / Q000032:analysis; D011145:Polyvinyls / Q000737:chemistry*; D011312:Pressure; D013055:Spectrophotometry, Infrared; D013499:Surface Properties; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*; D005465:Fluorocarbon Polymers
chemical_list: D064751:Ammonium Compounds; D005740:Gases; D008567:Membranes, Artificial; D009566:Nitrates; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers