title: Efficient treatment of phenolic wastewater with high salinity using a novel integrated system of magnetically immobilized cells coupling with electrodes.
abstract: A novel integrated system in which magnetically immobilized cells coupled with a pair of stainless iron meshes-graphite plate electrodes has been designed and operated to enhance the treatment performance of phenolic wastewater under high salinity. With NaCl concentration increased, phenol, o-cresol, m-cresol, p-cresol and COD removal rates by integrated system increased significantly, which were obviously higher than the sum of removal rates by single magnetically immobilized cells and electrode reaction. This integrated system exhibited higher removal rates for all the compounds than that by single magnetically immobilized cells during six cycles for reuse, and it still performed better, even when the voltage was cut off. These results indicated that there was a coupling effect between biodegradation and electrode reaction. The investigation of phenol hydroxylase activity and cells concentration confirmed that electrode reaction played an important role in this coupling effect.
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Key Lab of Marine Fishery Molecular Biology, Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, China.
authors.forename: Bei
authors.initials: B
authors.lastname: Jiang
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian 116081, China. Electronic address: shishengnan013@163.com.
authors.forename: Shengnan
authors.initials: S
authors.lastname: Shi
authors.affiliation: Liaoning Key Lab of Marine Fishery Molecular Biology, Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, China.
authors.forename: Lun
authors.initials: L
authors.lastname: Song
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian 116081, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Tan
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian 116081, China.
authors.forename: Meidi
authors.initials: M
authors.lastname: Li
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian 116081, China.
authors.forename: Jiaxin
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian 116081, China.
authors.forename: Lanlan
authors.initials: L
authors.lastname: Xue
mesh_terms: D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D018914:Cells, Immobilized / Q000737:chemistry / Q000378:metabolism; D003408:Cresols / Q000302:isolation & purification; D004566:Electrodes; D008280:Magnetics; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D054712:Salinity; D012965:Sodium Chloride; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D003408:Cresols; D010636:Phenols; D012965:Sodium Chloride; D062065:Wastewater; C032538:4-cresol; C034047:2-cresol
keywords: Electrode reaction; High salinity; Integrated system; Magnetically immobilized cells; Phenolic wastewater