title: Simultaneous nitrification and denitrification by EPSs in aerobic granular sludge enhanced nitrogen removal of ammonium-nitrogen-rich wastewater.
abstract: In this study, role of extracellular polymeric substances (EPSs) in enhancing nitrogen-removal from ammonium-nitrogen-rich wastewater using aerobic granular sludge (AGS) technology were analyzed. AGS enabled ammonium oxidation and denitrification to occur simultaneously. Air stripping and simultaneous nitrification-denitrification contributed to total-nitrogen removal. Clone-library analysis revealed that close relatives of Nitrosomonas eutropha and heterotrophic denitrifiers were dominant in the AGS, whereas anammox bacteria were not detected. EPSs adsorption of ammonium, nitrite, and nitrate nitrogen results in improved removal of nitrogen in batch experiments.
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: Shaoliang
authors.initials: S
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: Xiaolei
authors.initials: X
authors.lastname: Zhang
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: Yan
authors.initials: Y
authors.lastname: Wen
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 Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000332:Aerobiosis; D064751:Ammonium Compounds / Q000302:isolation & purification*; D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D001704:Biopolymers / Q000032:analysis*; D019149:Bioreactors / Q000382:microbiology; D058440:Denitrification; D058465:Nitrification; D009584:Nitrogen / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D010316:Particle Size; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D064751:Ammonium Compounds; D001704:Biopolymers; D009584:Nitrogen; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Adsorbed various nitrogen forms; EPSs in aerobic granular sludge; Enhanced nitrogen removal; Simultaneous nitrification and denitrification