title: Insight into the roles of tightly and loosely bound extracellular polymeric substances on a granular sludge in ammonium nitrogen removal.
abstract: To explicitly understand the function of extracellular polymeric substances in the treatment of ammonium-nitrogen-rich wastewater using aerobic granular sludge, the three forms of nitrogen (ammonium, nitrite and nitrate nitrogen) contained in tightly and loosely bound extracellular polymeric substances were analyzed. The three forms of nitrogen were monitored in the tightly and loosely bound extracellular polymeric substances in aerobic granular sludge after adsorption. The ammonium nitrogen contained in the extracellular polymeric substances was distributed in both the tightly and loosely bound forms and decreased gradually as the aeration time increased. Ammonium nitrogen remained in the tightly bound extracellular polymeric substances even after aeration was complete. The nitrite and nitrate nitrogen species in the extracellular polymeric substances were mainly present in the loosely bound extracellular polymeric substances. The sources of the three nitrogen forms detected in the extracellular polymeric substances differed relative to the different nitrogen forms.
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China. Electronic address: yanll98@163.com.
authors.forename: Lilong
authors.initials: L
authors.lastname: Yan
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Guoxin
authors.initials: G
authors.lastname: Hao
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Yihan
authors.initials: Y
authors.lastname: Guo
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ren
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Liangbin
authors.initials: L
authors.lastname: Yu
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Xuefei
authors.initials: X
authors.lastname: Bao
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D064751:Ammonium Compounds / Q000737:chemistry*; D001704:Biopolymers / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry; D009573:Nitrites / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry / Q000302:isolation & purification*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D064751:Ammonium Compounds; D001704:Biopolymers; D009566:Nitrates; D009573:Nitrites; D009584:Nitrogen; D012722:Sewage; D062065:Wastewater
keywords: Adsorption; Aerobic granular sludge; LBEPSs; TBEPSs; Various nitrogen forms