title: [Rapid Start-up of Simultaneous Nitrification and Denitrification Coupled Phosphorus Removal Process and Its Performing Characteristics].
abstract: In this study, simultaneous nitrification and denitrification (SND) coupled Phosphorus removal process through gradually decreasing DO concentration was investigated by treating wastewater with a low COD/TN ratio (C/N = 3 : 1-4: 1) in a sequencing batch reactor (SBR) inoculated with aerobic granular sludge (AGS). Successful SND coupled Phosphorus phenomenon occurred after 20d at the DO concentration of 0.50-1.0 mg x L(-1). In the following 40 days, the average removal rates of COD, NH4(+) -N, TN and TP were 84.84% , 93.51%, 77.06% and 85.69%, and the NO3(-) -N and NO2(-) -N average accumulations in the effluent were only 4.01 mg x L(-1) and 3.17 mg x L(-1), respectively. The AGS had complete forms and good settling performances, and the sludge volume index (SVI) was about 55.22 mL x g(-1) at the end of starting-up stage. The results of different nitrogen sources showed that the removal rate of TN was in the order of NH4(+) -N > NO2(-) -N > NO3(-) -N, and the removal rate of TP was in the order of NO3(-) -N > NO2(-) -N > NH4(+) -N. The nitrogen and phosphorus removal of wastewater were mainly realized by simultaneous nitrification and denitrification and denitrifying phosphorus removal, respectively.
authors.forename: Lu
authors.initials: L
authors.lastname: Leng
authors.forename: Xin
authors.initials: X
authors.lastname: Xin
authors.forename: Hang
authors.initials: H
authors.lastname: Lu
authors.forename: Ya-nan
authors.initials: YN
authors.lastname: Tang
authors.forename: Li-hua
authors.initials: LH
authors.lastname: Wan
authors.forename: Jun-yuan
authors.initials: JY
authors.lastname: Guo
authors.forename: Qing-feng
authors.initials: QF
authors.lastname: Cheng
mesh_terms: D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D058440:Denitrification; D058465:Nitrification; D009584:Nitrogen / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry
chemical_list: D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater